cache variable lookups

2026-01-01 15:55:40 +03:00 · 2013-05-16 20:47:00 -04:00
212 changed files with 6297 additions and 14657 deletions
--- a/.github/probots.yml
+++ b/.github/probots.yml
@@ -1,2 +0,0 @@
-enabled:
-  - cla
--- a/.gitignore
+++ b/.gitignore
@@ -4,7 +4,3 @@
 pkg
 *.rbc
 .rvmrc
-.ruby-version
-Gemfile.lock
-.bundle
-.byebug_history
--- a/.rubocop-https---shopify-github-io-ruby-style-guide-rubocop-yml
+++ b/.rubocop-https---shopify-github-io-ruby-style-guide-rubocop-yml
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,17 +0,0 @@
-inherit_from:
-  - 'https://shopify.github.io/ruby-style-guide/rubocop.yml'
-  - .rubocop_todo.yml
-
-require: rubocop-performance
-
-Performance:
-  Enabled: true
-
-AllCops:
-  TargetRubyVersion: 2.4
-  Exclude:
-    - 'vendor/bundle/**/*'
-
-Naming/MethodName:
-  Exclude:
-    - 'example/server/liquid_servlet.rb'
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,48 +0,0 @@
-# This configuration was generated by
-# `rubocop --auto-gen-config`
-# on 2019-09-11 06:34:25 +1000 using RuboCop version 0.74.0.
-# The point is for the user to remove these configuration records
-# one by one as the offenses are removed from the code base.
-# Note that changes in the inspected code, or installation of new
-# versions of RuboCop, may require this file to be generated again.
-
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: runtime_error, standard_error
-Lint/InheritException:
-  Exclude:
-    - 'lib/liquid/interrupts.rb'
-
-# Offense count: 98
-# Cop supports --auto-correct.
-# Configuration parameters: AutoCorrect, AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
-# URISchemes: http, https
-Layout/LineLength:
-  Max: 294
-
-# Offense count: 44
-Naming/ConstantName:
-  Exclude:
-    - 'lib/liquid.rb'
-    - 'lib/liquid/block_body.rb'
-    - 'lib/liquid/tags/assign.rb'
-    - 'lib/liquid/tags/capture.rb'
-    - 'lib/liquid/tags/case.rb'
-    - 'lib/liquid/tags/cycle.rb'
-    - 'lib/liquid/tags/for.rb'
-    - 'lib/liquid/tags/if.rb'
-    - 'lib/liquid/tags/include.rb'
-    - 'lib/liquid/tags/raw.rb'
-    - 'lib/liquid/tags/table_row.rb'
-    - 'lib/liquid/variable.rb'
-    - 'performance/shopify/comment_form.rb'
-    - 'performance/shopify/paginate.rb'
-    - 'test/integration/tags/include_tag_test.rb'
-
-# Offense count: 5
-Style/ClassVars:
-  Exclude:
-    - 'lib/liquid/condition.rb'
-    - 'lib/liquid/strainer.rb'
-    - 'lib/liquid/template.rb'
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,26 +1,13 @@
-language: ruby
-cache: bundler
-
 rvm:
-  - 2.4
-  - 2.5
-  - 2.6
-  - &latest_ruby 2.7
-  - ruby-head
+  - 1.8.7
+  - 1.9.3
+  - ree
+  - jruby-18mode
+  - jruby-19mode
+  - rbx-18mode
+  - rbx-19mode

-matrix:
-  include:
-    - rvm: *latest_ruby
-      script: bundle exec rake memory_profile:run
-      name: Profiling Memory Usage
-  allow_failures:
-    - rvm: ruby-head
-
-branches:
-  only:
-    - master
-    - gh-pages
-    - /.*-stable/
+script: "rake test"

 notifications:
  disable: true
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,25 +0,0 @@
-# How to contribute
-
-## Things we will merge
-
-* Bugfixes
-* Performance improvements
-* Features that are likely to be useful to the majority of Liquid users
-
-## Things we won't merge
-
-* Code that introduces considerable performance degrations
-* Code that touches performance-critical parts of Liquid and comes without benchmarks
-* Features that are not important for most people (we want to keep the core Liquid code small and tidy)
-* Features that can easily be implemented on top of Liquid (for example as a custom filter or custom filesystem)
-* Code that does not include tests
-* Code that breaks existing tests
-
-## Workflow
-
-* Fork the Liquid repository
-* Create a new branch in your fork
-* If it makes sense, add tests for your code and/or run a performance benchmark
-* Make sure all tests pass (`bundle exec rake`)
-* Create a pull request
-
--- a/27
+++ b/27
@@ -1,27 +0,0 @@
-# frozen_string_literal: true
-
-source 'https://rubygems.org'
-git_source(:github) do |repo_name|
-  "https://github.com/#{repo_name}.git"
-end
-
-gemspec
-
-group :benchmark, :test do
-  gem 'benchmark-ips'
-  gem 'memory_profiler'
-  gem 'terminal-table'
-
-  install_if -> { RUBY_PLATFORM !~ /mingw|mswin|java/ && RUBY_ENGINE != 'truffleruby' } do
-    gem 'stackprof'
-  end
-end
-
-group :test do
-  gem 'rubocop', '~> 0.78.0', require: false
-  gem 'rubocop-performance', require: false
-
-  platform :mri, :truffleruby do
-    gem 'liquid-c', github: 'Shopify/liquid-c', ref: 'master'
-  end
-end
--- a/History.md
+++ b/History.md
@@ -1,222 +1,4 @@
-# Liquid Change Log
-
-### Unreleased
-
-* Split Strainer class as a factory and a template (#1208) [Thierry Joyal]
-* Remove handling of a nil context in the Strainer class (#1218) [Thierry Joyal]
-* StaticRegisters#fetch to raise on missing key (#1250) [Thierry Joyal]
-
-## 4.0.3 / 2019-03-12
-
-### Fixed
-* Fix break and continue tags inside included templates in loops (#1072) [Justin Li]
-
-## 4.0.2 / 2019-03-08
-
-### Changed
-* Add `where` filter (#1026) [Samuel Doiron]
-* Add `ParseTreeVisitor` to iterate the Liquid AST (#1025) [Stephen Paul Weber]
-* Improve `strip_html` performance (#1032) [printercu]
-
-### Fixed
-* Add error checking for invalid combinations of inputs to sort, sort_natural, where, uniq, map, compact filters (#1059) [Garland Zhang]
-* Validate the character encoding in url_decode (#1070) [Clayton Smith]
-
-## 4.0.1 / 2018-10-09
-
-### Changed
-* Add benchmark group in Gemfile (#855) [Jerry Liu]
-* Allow benchmarks to benchmark render by itself (#851) [Jerry Liu]
-* Avoid calling `line_number` on String node when rescuing a render error. (#860) [Dylan Thacker-Smith]
-* Avoid duck typing to detect whether to call render on a node. [Dylan Thacker-Smith]
-* Clarify spelling of `reversed` on `for` block tag (#843) [Mark Crossfield]
-* Replace recursion with loop to avoid potential stack overflow from malicious input (#891, #892) [Dylan Thacker-Smith]
-* Limit block tag nesting to 100 (#894) [Dylan Thacker-Smith]
-* Replace `assert_equal nil` with `assert_nil` (#895) [Dylan Thacker-Smith]
-* Remove Spy Gem (#896) [Dylan Thacker-Smith]
-* Add `collection_name` and `variable_name` reader to `For` block (#909)
-* Symbols render as strings (#920) [Justin Li]
-* Remove default value from Hash objects (#932) [Maxime Bedard]
-* Remove one level of nesting (#944) [Dylan Thacker-Smith]
-* Update Rubocop version (#952) [Justin Li]
-* Add `at_least` and `at_most` filters (#954, #958) [Nithin Bekal]
-* Add a regression test for a liquid-c trim mode bug (#972) [Dylan Thacker-Smith]
-* Use https rather than git protocol to fetch liquid-c [Dylan Thacker-Smith]
-* Add tests against Ruby 2.4 (#963) and 2.5 (#981)
-* Replace RegExp literals with constants (#988) [Ashwin Maroli]
-* Replace unnecessary `#each_with_index` with `#each` (#992) [Ashwin Maroli]
-* Improve the unexpected end delimiter message for block tags. (#1003) [Dylan Thacker-Smith]
-* Refactor and optimize rendering (#1005) [Christopher Aue]
-* Add installation instruction (#1006) [Ben Gift]
-* Remove Circle CI (#1010)
-* Rename deprecated `BigDecimal.new` to `BigDecimal` (#1024) [Koichi ITO]
-* Rename deprecated Rubocop name (#1027) [Justin Li]
-
-### Fixed
-* Handle `join` filter on non String joiners (#857) [Richard Monette]
-* Fix duplicate inclusion condition logic error of `Liquid::Strainer.add_filter` method (#861)
-* Fix `escape`, `url_encode`, `url_decode` not handling non-string values (#898) [Thierry Joyal]
-* Fix raise when variable is defined but nil when using `strict_variables` [Pascal Betz]
-* Fix `sort` and `sort_natural` to handle arrays with nils (#930) [Eric Chan]
-
-## 4.0.0 / 2016-12-14 / branch "4-0-stable"
-
-### Changed
-* Render an opaque internal error by default for non-Liquid::Error (#835) [Dylan Thacker-Smith]
-* Ruby 2.0 support dropped (#832) [Dylan Thacker-Smith]
-* Add to_number Drop method to allow custom drops to work with number filters (#731)
-* Add strict_variables and strict_filters options to detect undefined references (#691)
-* Improve loop performance (#681) [Florian Weingarten]
-* Rename Drop method `before_method` to `liquid_method_missing` (#661) [Thierry Joyal]
-* Add url_decode filter to invert url_encode (#645) [Larry Archer]
-* Add global_filter to apply a filter to all output (#610) [Loren Hale]
-* Add compact filter (#600) [Carson Reinke]
-* Rename deprecated "has_key?" and "has_interrupt?" methods (#593) [Florian Weingarten]
-* Include template name with line numbers in render errors (574) [Dylan Thacker-Smith]
-* Add sort_natural filter (#554) [Martin Hanzel]
-* Add forloop.parentloop as a reference to the parent loop (#520) [Justin Li]
-* Block parsing moved to BlockBody class (#458) [Dylan Thacker-Smith]
-* Add concat filter to concatenate arrays (#429) [Diogo Beato]
-* Ruby 1.9 support dropped (#491) [Justin Li]
-* Liquid::Template.file_system's read_template_file method is no longer passed the context. (#441) [James Reid-Smith]
-* Remove `liquid_methods` (See https://github.com/Shopify/liquid/pull/568 for replacement)
-* Liquid::Template.register_filter raises when the module overrides registered public methods as private or protected (#705) [Gaurav Chande]
-
-### Fixed
-
-* Fix variable names being detected as an operator when starting with contains (#788) [Michael Angell]
-* Fix include tag used with strict_variables (#828) [QuickPay]
-* Fix map filter when value is a Proc (#672) [Guillaume Malette]
-* Fix truncate filter when value is not a string (#672) [Guillaume Malette]
-* Fix behaviour of escape filter when input is nil (#665) [Tanel Jakobsoo]
-* Fix sort filter behaviour with empty array input (#652) [Marcel Cary]
-* Fix test failure under certain timezones (#631) [Dylan Thacker-Smith]
-* Fix bug in uniq filter (#595) [Florian Weingarten]
-* Fix bug when "blank" and "empty" are used as variable names (#592) [Florian Weingarten]
-* Fix condition parse order in strict mode (#569) [Justin Li]
-* Fix naming of the "context variable" when dynamically including a template (#559) [Justin Li]
-* Gracefully accept empty strings in the date filter (#555) [Loren Hale]
-* Fix capturing into variables with a hyphen in the name (#505) [Florian Weingarten]
-* Fix case sensitivity regression in date standard filter (#499) [Kelley Reynolds]
-* Disallow filters with no variable in strict mode (#475) [Justin Li]
-* Disallow variable names in the strict parser that are not valid in the lax parser (#463) [Justin Li]
-* Fix BlockBody#warnings taking exponential time to compute (#486) [Justin Li]
-
-## 3.0.5 / 2015-07-23 / branch "3-0-stable"
-
-* Fix test failure under certain timezones [Dylan Thacker-Smith]
-
-## 3.0.4 / 2015-07-17
-
-* Fix chained access to multi-dimensional hashes [Florian Weingarten]
-
-## 3.0.3 / 2015-05-28
-
-* Fix condition parse order in strict mode (#569) [Justin Li]
-
-## 3.0.2 / 2015-04-24
-
-* Expose VariableLookup private members (#551) [Justin Li]
-* Documentation fixes
-
-## 3.0.1 / 2015-01-23
-
-* Remove duplicate `index0` key in TableRow tag (#502) [Alfred Xing]
-
-## 3.0.0 / 2014-11-12
-
-* Removed Block#end_tag. Instead, override parse with `super` followed by your code. See #446 [Dylan Thacker-Smith]
-* Fixed condition with wrong data types (#423) [Bogdan Gusiev]
-* Add url_encode to standard filters (#421) [Derrick Reimer]
-* Add uniq to standard filters [Florian Weingarten]
-* Add exception_handler feature (#397) and #254 [Bogdan Gusiev, Florian Weingarten]
-* Optimize variable parsing to avoid repeated regex evaluation during template rendering #383 [Jason Hiltz-Laforge]
-* Optimize checking for block interrupts to reduce object allocation #380 [Jason Hiltz-Laforge]
-* Properly set context rethrow_errors on render! #349 [Thierry Joyal]
-* Fix broken rendering of variables which are equal to false (#345) [Florian Weingarten]
-* Remove ActionView template handler [Dylan Thacker-Smith]
-* Freeze lots of string literals for new Ruby 2.1 optimization (#297) [Florian Weingarten]
-* Allow newlines in tags and variables (#324) [Dylan Thacker-Smith]
-* Tag#parse is called after initialize, which now takes options instead of tokens as the 3rd argument. See #321 [Dylan Thacker-Smith]
-* Raise `Liquid::ArgumentError` instead of `::ArgumentError` when filter has wrong number of arguments #309 [Bogdan Gusiev]
-* Add a to_s default for liquid drops (#306) [Adam Doeler]
-* Add strip, lstrip, and rstrip to standard filters [Florian Weingarten]
-* Make if, for & case tags return complete and consistent nodelists (#250) [Nick Jones]
-* Prevent arbitrary method invocation on condition objects (#274) [Dylan Thacker-Smith]
-* Don't call to_sym when creating conditions for security reasons (#273) [Bouke van der Bijl]
-* Fix resource counting bug with respond_to?(:length) (#263) [Florian Weingarten]
-* Allow specifying custom patterns for template filenames (#284) [Andrei Gladkyi]
-* Allow drops to optimize loading a slice of elements (#282) [Tom Burns]
-* Support for passing variables to snippets in subdirs (#271) [Joost Hietbrink]
-* Add a class cache to avoid runtime extend calls (#249) [James Tucker]
-* Remove some legacy Ruby 1.8 compatibility code (#276) [Florian Weingarten]
-* Add default filter to standard filters (#267) [Derrick Reimer]
-* Add optional strict parsing and warn parsing (#235) [Tristan Hume]
-* Add I18n syntax error translation (#241) [Simon Hørup Eskildsen, Sirupsen]
-* Make sort filter work on enumerable drops (#239) [Florian Weingarten]
-* Fix clashing method names in enumerable drops (#238) [Florian Weingarten]
-* Make map filter work on enumerable drops (#233) [Florian Weingarten]
-* Improved whitespace stripping for blank blocks, related to #216 [Florian Weingarten]
-
-## 2.6.3 / 2015-07-23 / branch "2-6-stable"
-
-* Fix test failure under certain timezones [Dylan Thacker-Smith]
-
-## 2.6.2 / 2015-01-23
-
-* Remove duplicate hash key [Parker Moore]
-
-## 2.6.1 / 2014-01-10
-
-Security fix, cherry-picked from master (4e14a65):
-* Don't call to_sym when creating conditions for security reasons (#273) [Bouke van der Bijl]
-* Prevent arbitrary method invocation on condition objects (#274) [Dylan Thacker-Smith]
-
-## 2.6.0 / 2013-11-25
-
-IMPORTANT: Liquid 2.6 is going to be the last version of Liquid which maintains explicit Ruby 1.8 compatability.
-The following releases will only be tested against Ruby 1.9 and Ruby 2.0 and are likely to break on Ruby 1.8.
-
-* Bugfix for #106: fix example servlet [gnowoel]
-* Bugfix for #97: strip_html filter supports multi-line tags [Jo Liss]
-* Bugfix for #114: strip_html filter supports style tags [James Allardice]
-* Bugfix for #117: 'now' support for date filter in Ruby 1.9 [Notre Dame Webgroup]
-* Bugfix for #166: truncate filter on UTF-8 strings with Ruby 1.8 [Florian Weingarten]
-* Bugfix for #204: 'raw' parsing bug [Florian Weingarten]
-* Bugfix for #150: 'for' parsing bug [Peter Schröder]
-* Bugfix for #126: Strip CRLF in strip_newline [Peter Schröder]
-* Bugfix for #174, "can't convert Fixnum into String" for "replace" [jsw0528]
-* Allow a Liquid::Drop to be passed into Template#render [Daniel Huckstep]
-* Resource limits [Florian Weingarten]
-* Add reverse filter [Jay Strybis]
-* Add utf-8 support
-* Use array instead of Hash to keep the registered filters [Tasos Stathopoulos]
-* Cache tokenized partial templates [Tom Burns]
-* Avoid warnings in Ruby 1.9.3 [Marcus Stollsteimer]
-* Better documentation for 'include' tag (closes #163) [Peter Schröder]
-* Use of BigDecimal on filters to have better precision (closes #155) [Arthur Nogueira Neves]
-
-## 2.5.5 / 2014-01-10 / branch "2-5-stable"
-
-Security fix, cherry-picked from master (4e14a65):
-* Don't call to_sym when creating conditions for security reasons (#273) [Bouke van der Bijl]
-* Prevent arbitrary method invocation on condition objects (#274) [Dylan Thacker-Smith]
-
-## 2.5.4 / 2013-11-11
-
-* Fix "can't convert Fixnum into String" for "replace" (#173), [jsw0528]
-
-## 2.5.3 / 2013-10-09
-
-* #232, #234, #237: Fix map filter bugs [Florian Weingarten]
-
-## 2.5.2 / 2013-09-03 / deleted
-
-Yanked from rubygems, as it contained too many changes that broke compatibility. Those changes will be on following major releases.
-
-## 2.5.1 / 2013-07-24
-
-* #230: Fix security issue with map filter, Use invoke_drop in map filter [Florian Weingarten]
+# Liquid Version History

 ## 2.5.0 / 2013-03-06

@@ -226,7 +8,6 @@ Yanked from rubygems, as it contained too many changes that broke compatibility.
 * Fix filter parser for args without space separators
 * Add support for filter keyword arguments

-
 ## 2.4.0 / 2012-08-03

 * Performance improvements
--- a/2
+++ b/2
@@ -17,4 +17,4 @@ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--- a/README.md
+++ b/README.md
@@ -1,14 +1,5 @@
-[![Build Status](https://api.travis-ci.org/Shopify/liquid.svg?branch=master)](http://travis-ci.org/Shopify/liquid)
-[![Inline docs](http://inch-ci.org/github/Shopify/liquid.svg?branch=master)](http://inch-ci.org/github/Shopify/liquid)
-
 # Liquid template engine

-* [Contributing guidelines](CONTRIBUTING.md)
-* [Version history](History.md)
-* [Liquid documentation from Shopify](http://docs.shopify.com/themes/liquid-basics)
-* [Liquid Wiki at GitHub](https://github.com/Shopify/liquid/wiki)
-* [Website](http://liquidmarkup.org/)
-
 ## Introduction

 Liquid is a template engine which was written with very specific requirements:
@@ -42,8 +33,6 @@ Liquid is a template engine which was written with very specific requirements:

 ## How to use Liquid

-Install Liquid by adding `gem 'liquid'` to your gemfile.
-
 Liquid supports a very simple API based around the Liquid::Template class.
 For standard use you can just pass it the content of a file and call render with a parameters hash.

@@ -52,63 +41,4 @@ For standard use you can just pass it the content of a file and call render with
@template.render('name' => 'tobi')                # => "hi tobi"
 ```

-### Error Modes
-
-Setting the error mode of Liquid lets you specify how strictly you want your templates to be interpreted.
-Normally the parser is very lax and will accept almost anything without error. Unfortunately this can make
-it very hard to debug and can lead to unexpected behaviour. 
-
-Liquid also comes with a stricter parser that can be used when editing templates to give better error messages
-when templates are invalid. You can enable this new parser like this:
-
-```ruby
-Liquid::Template.error_mode = :strict # Raises a SyntaxError when invalid syntax is used
-Liquid::Template.error_mode = :warn # Adds errors to template.errors but continues as normal
-Liquid::Template.error_mode = :lax # The default mode, accepts almost anything.
-```
-
-If you want to set the error mode only on specific templates you can pass `:error_mode` as an option to `parse`:
-```ruby
-Liquid::Template.parse(source, :error_mode => :strict)
-```
-This is useful for doing things like enabling strict mode only in the theme editor.
-
-It is recommended that you enable `:strict` or `:warn` mode on new apps to stop invalid templates from being created.
-It is also recommended that you use it in the template editors of existing apps to give editors better error messages.
-
-### Undefined variables and filters
-
-By default, the renderer doesn't raise or in any other way notify you if some variables or filters are missing, i.e. not passed to the `render` method.
-You can improve this situation by passing `strict_variables: true` and/or `strict_filters: true` options to the `render` method.
-When one of these options is set to true, all errors about undefined variables and undefined filters will be stored in `errors` array of a `Liquid::Template` instance.
-Here are some examples:
-
-```ruby
-template = Liquid::Template.parse("{{x}} {{y}} {{z.a}} {{z.b}}")
-template.render({ 'x' => 1, 'z' => { 'a' => 2 } }, { strict_variables: true })
-#=> '1  2 ' # when a variable is undefined, it's rendered as nil
-template.errors
-#=> [#<Liquid::UndefinedVariable: Liquid error: undefined variable y>, #<Liquid::UndefinedVariable: Liquid error: undefined variable b>]
-```
-
-```ruby
-template = Liquid::Template.parse("{{x | filter1 | upcase}}")
-template.render({ 'x' => 'foo' }, { strict_filters: true })
-#=> '' # when at least one filter in the filter chain is undefined, a whole expression is rendered as nil
-template.errors
-#=> [#<Liquid::UndefinedFilter: Liquid error: undefined filter filter1>]
-```
-
-If you want to raise on a first exception instead of pushing all of them in `errors`, you can use `render!` method:
-
-```ruby
-template = Liquid::Template.parse("{{x}} {{y}}")
-template.render!({ 'x' => 1}, { strict_variables: true })
-#=> Liquid::UndefinedVariable: Liquid error: undefined variable y
-```
-
-### Usage tracking
-
-To help track usages of a feature or code path in production, we have released opt-in usage tracking. To enable this, we provide an empty `Liquid:: Usage.increment` method which you can customize to your needs. The feature is well suited to https://github.com/Shopify/statsd-instrument. However, the choice of implementation is up to you.
-
-Once you have enabled usage tracking, we recommend reporting any events through Github Issues that your system may be logging. It is highly likely this event has been added to consider deprecating or improving code specific to this event, so please raise any concerns.
+[![Build Status](https://secure.travis-ci.org/Shopify/liquid.png)](http://travis-ci.org/Shopify/liquid)
--- a/99
+++ b/99
@@ -1,106 +1,53 @@
-# frozen_string_literal: true
+#!/usr/bin/env ruby

+require 'rubygems'
 require 'rake'
 require 'rake/testtask'
-$LOAD_PATH.unshift(File.expand_path("../lib", __FILE__))
-require "liquid/version"
+require 'rubygems/package_task'

-task(default: [:test, :rubocop])
+task :default => 'test'

-desc('run test suite with default parser')
-Rake::TestTask.new(:base_test) do |t|
+Rake::TestTask.new(:test) do |t|
  t.libs << '.' << 'lib' << 'test'
-  t.test_files = FileList['test/{integration,unit}/**/*_test.rb']
-  t.verbose    = false
+  t.test_files = FileList['test/liquid/**/*_test.rb']
+  t.verbose = false
 end

-desc('run test suite with warn error mode')
-task :warn_test do
-  ENV['LIQUID_PARSER_MODE'] = 'warn'
-  Rake::Task['base_test'].invoke
+gemspec = eval(File.read('liquid.gemspec'))
+Gem::PackageTask.new(gemspec) do |pkg|
+  pkg.gem_spec = gemspec
 end

-task :rubocop do
-  if RUBY_ENGINE == 'ruby'
-    require 'rubocop/rake_task'
-    RuboCop::RakeTask.new
-  end
-end
-
-desc('runs test suite with both strict and lax parsers')
-task :test do
-  ENV['LIQUID_PARSER_MODE'] = 'lax'
-  Rake::Task['base_test'].invoke
-
-  ENV['LIQUID_PARSER_MODE'] = 'strict'
-  Rake::Task['base_test'].reenable
-  Rake::Task['base_test'].invoke
-
-  if RUBY_ENGINE == 'ruby' || RUBY_ENGINE == 'truffleruby'
-    ENV['LIQUID_C'] = '1'
-
-    ENV['LIQUID_PARSER_MODE'] = 'lax'
-    Rake::Task['base_test'].reenable
-    Rake::Task['base_test'].invoke
-
-    ENV['LIQUID_PARSER_MODE'] = 'strict'
-    Rake::Task['base_test'].reenable
-    Rake::Task['base_test'].invoke
-  end
-end
-
-task(gem: :build)
-task :build do
-  system "gem build liquid.gemspec"
-end
-
-task install: :build do
-  system "gem install liquid-#{Liquid::VERSION}.gem"
-end
-
-task release: :build do
-  system "git tag -a v#{Liquid::VERSION} -m 'Tagging #{Liquid::VERSION}'"
-  system "git push --tags"
-  system "gem push liquid-#{Liquid::VERSION}.gem"
-  system "rm liquid-#{Liquid::VERSION}.gem"
+desc "Build the gem and release it to rubygems.org"
+task :release => :gem do
+  sh "gem push pkg/liquid-#{gemspec.version}.gem"
 end

 namespace :benchmark do
-  desc "Run the liquid benchmark with lax parsing"
+
+  desc "Run the liquid benchmark"
  task :run do
-    ruby "./performance/benchmark.rb lax"
+    ruby "./performance/benchmark.rb"
  end

-  desc "Run the liquid benchmark with strict parsing"
-  task :strict do
-    ruby "./performance/benchmark.rb strict"
-  end
 end

+
 namespace :profile do
+
  desc "Run the liquid profile/performance coverage"
  task :run do
    ruby "./performance/profile.rb"
  end

-  desc "Run the liquid profile/performance coverage with strict parsing"
-  task :strict do
-    ruby "./performance/profile.rb strict"
+  desc "Run KCacheGrind"
+  task :grind => :run  do
+    system "qcachegrind /tmp/liquid.rubyprof_calltreeprinter.txt"
  end
+
 end

-namespace :memory_profile do
-  desc "Run memory profiler"
-  task :run do
-    ruby "./performance/memory_profile.rb"
-  end
-end
-
-desc("Run example")
+desc "Run example"
 task :example do
  ruby "-w -d -Ilib example/server/server.rb"
 end
-
-task :console do
-  exec 'irb -I lib -r liquid'
-end
--- a/example/server/example_servlet.rb
+++ b/example/server/example_servlet.rb
@@ -1,46 +1,41 @@
-# frozen_string_literal: true
-
 module ProductsFilter
  def price(integer)
-    format("$%.2d USD", integer / 100.0)
+    sprintf("$%.2d USD", integer / 100.0)
  end
-
+  
  def prettyprint(text)
-    text.gsub(/\*(.*)\*/, '<b>\1</b>')
+    text.gsub( /\*(.*)\*/, '<b>\1</b>' )
  end
-
+  
  def count(array)
    array.size
  end
-
+  
  def paragraph(p)
    "<p>#{p}</p>"
  end
 end

 class Servlet < LiquidServlet
+  
  def index
    { 'date' => Time.now }
  end
-
-  def products
-    { 'products' => products_list, 'more_products' => more_products_list, 'description' => description, 'section' => 'Snowboards', 'cool_products' => true }
-  end
-
-  private
-
-  def products_list
-    [{ 'name' => 'Arbor Draft', 'price' => 39900, 'description' => 'the *arbor draft* is a excellent product' },
-     { 'name' => 'Arbor Element', 'price' => 40000, 'description' => 'the *arbor element* rocks for freestyling' },
-     { 'name' => 'Arbor Diamond', 'price' => 59900, 'description' => 'the *arbor diamond* is a made up product because im obsessed with arbor and have no creativity' }]
-  end
-
-  def more_products_list
-    [{ 'name' => 'Arbor Catalyst', 'price' => 39900, 'description' => 'the *arbor catalyst* is an advanced drop-through for freestyle and flatground performance and versatility' },
-     { 'name' => 'Arbor Fish', 'price' => 40000, 'description' => 'the *arbor fish* is a compact pin that features an extended wheelbase and time-honored teardrop shape' }]
+  
+  def products    
+    { 'products' => products_list, 'section' => 'Snowboards', 'cool_products' => true}    
  end

  def description
    "List of Products ~ This is a list of products with price and description."
  end
+
+  private
+  
+  def products_list
+    [{'name' => 'Arbor Draft', 'price' => 39900, 'description' => 'the *arbor draft* is a excellent product' },
+    {'name' => 'Arbor Element', 'price' => 40000, 'description' => 'the *arbor element* rocks for freestyling'},
+    {'name' => 'Arbor Diamond', 'price' => 59900, 'description' => 'the *arbor diamond* is a made up product because im obsessed with arbor and have no creativity'}]
+  end
+  
 end
--- a/example/server/liquid_servlet.rb
+++ b/example/server/liquid_servlet.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 class LiquidServlet < WEBrick::HTTPServlet::AbstractServlet
+
  def do_GET(req, res)
    handle(:get, req, res)
  end
@@ -8,23 +7,22 @@ class LiquidServlet < WEBrick::HTTPServlet::AbstractServlet
  def do_POST(req, res)
    handle(:post, req, res)
  end
-
+  
  private
-
-  def handle(_type, req, res)
-    @request  = req
-    @response = res
-
-    @request.path_info =~ /(\w+)\z/
-    @action  = Regexp.last_match(1) || 'index'
-    @assigns = send(@action) if respond_to?(@action)
+  
+  def handle(type, req, res)
+    @request, @response = req, res
+    
+    @request.path_info =~ /(\w+)$/
+    @action = $1 || 'index'    
+    @assigns = send(@action) if respond_to?(@action)    

    @response['Content-Type'] = "text/html"
    @response.status = 200
-    @response.body   = Liquid::Template.parse(read_template).render(@assigns, filters: [ProductsFilter])
+    @response.body = Liquid::Template.parse(read_template).render(@assigns, :filters => [ProductsFilter])      
  end
-
+  
  def read_template(filename = @action)
-    File.read("#{__dir__}/templates/#{filename}.liquid")
+    File.read( File.dirname(__FILE__) + "/templates/#{filename}.liquid" )
  end
-end
+end
--- a/example/server/server.rb
+++ b/example/server/server.rb
@@ -1,14 +1,14 @@
-# frozen_string_literal: true
-
 require 'webrick'
 require 'rexml/document'

-require_relative '../../lib/liquid'
-require_relative 'liquid_servlet'
-require_relative 'example_servlet'
+DIR = File.expand_path(File.dirname(__FILE__))
+
+require DIR + '/../../lib/liquid'
+require DIR + '/liquid_servlet'
+require DIR + '/example_servlet'

 # Setup webrick
-server = WEBrick::HTTPServer.new(Port: ARGV[1] || 3000)
+server = WEBrick::HTTPServer.new( :Port => ARGV[1] || 3000 )
 server.mount('/', Servlet)
-trap("INT") { server.shutdown }
+trap("INT"){ server.shutdown }
 server.start
--- a/example/server/templates/index.liquid
+++ b/example/server/templates/index.liquid
@@ -3,4 +3,4 @@
 <p>It is {{date}}</p>


-<p>Check out the <a href="/products">Products</a> screen </p>
+<p>Check out the <a href="http://localhost:3000/products">Products</a> screen </p>
--- a/example/server/templates/products.liquid
+++ b/example/server/templates/products.liquid
@@ -1,49 +1,49 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
-  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 
+	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
-  <head>
-    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
-    <meta http-equiv="Content-Language" content="en-us" />
+	<head>
+		<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
+		<meta http-equiv="Content-Language" content="en-us" />
+		
+		<title>products</title>
+		
+		<meta name="ROBOTS" content="ALL" />
+		<meta http-equiv="imagetoolbar" content="no" />
+		<meta name="MSSmartTagsPreventParsing" content="true" />
+		<meta name="Copyright" content="(c) 2005 Copyright content:  Copyright design: Tobias Luetke" />
+		<!-- (c) Copyright 2005 by Tobias Luetke All Rights Reserved. -->
+	</head>
+	
+	<body>

-    <title>products</title>
+	  <h1>{{ description | split: '~' | first }}</h1>

-    <meta name="ROBOTS" content="ALL" />
-    <meta http-equiv="imagetoolbar" content="no" />
-    <meta name="MSSmartTagsPreventParsing" content="true" />
-    <meta name="Copyright" content="(c) 2005 Copyright content:  Copyright design: Tobias Luetke" />
-    <!-- (c) Copyright 2005 by Tobias Luetke All Rights Reserved. -->
-  </head>
+	  <h2>{{ description | split: '~' | last }}</h2>

-  <body>
-    {% assign all_products = products | concat: more_products  %}
-    <h1>{{ description | split: '~' | first }}</h1>
-
-    <h2>{{ description | split: '~' | last }}</h2>
-
-    <h2>There are currently {{all_products | count}} products in the {{section}} catalog</h2>
+	  <h2>There are currently {{products | count}} products in the {{section}} catalog</h2>

    {% if cool_products %}
-      Cool products :)
+      Cool products :) 
    {% else %}
-      Uncool products :(
+      Uncool products :(    
    {% endif %}

    <ul id="products">
-
-      {% for product in all_products %}
+      
+      {% for product in products %}
        <li>
          <h2>{{product.name}}</h2>
          Only {{product.price | price }}
-
+      
          {{product.description | prettyprint | paragraph }}
-
+          
          {{ 'it rocks!' | paragraph }}
-
-        </li>
+          
+        </li>      
      {% endfor %}
-
+      
    </ul>
-
-  </body>
+	
+	</body>
 </html>
--- a/init.rb
+++ b/init.rb
@@ -0,0 +1,8 @@
+require 'liquid'
+require 'extras/liquid_view'
+
+if defined? ActionView::Template and ActionView::Template.respond_to? :register_template_handler
+  ActionView::Template
+else
+  ActionView::Base
+end.register_template_handler(:liquid, LiquidView)
--- a/lib/extras/liquid_view.rb
+++ b/lib/extras/liquid_view.rb
@@ -0,0 +1,51 @@
+# LiquidView is a action view extension class. You can register it with rails
+# and use liquid as an template system for .liquid files
+#
+# Example
+# 
+#   ActionView::Base::register_template_handler :liquid, LiquidView
+class LiquidView
+  PROTECTED_ASSIGNS = %w( template_root response _session template_class action_name request_origin session template
+                          _response url _request _cookies variables_added _flash params _headers request cookies
+                          ignore_missing_templates flash _params logger before_filter_chain_aborted headers )
+  PROTECTED_INSTANCE_VARIABLES = %w( @_request @controller @_first_render @_memoized__pick_template @view_paths 
+                                     @helpers @assigns_added @template @_render_stack @template_format @assigns )
+  
+  def self.call(template)
+    "LiquidView.new(self).render(template, local_assigns)"
+  end
+
+  def initialize(view)
+    @view = view
+  end
+  
+  def render(template, local_assigns = nil)
+    @view.controller.headers["Content-Type"] ||= 'text/html; charset=utf-8'
+    
+    # Rails 2.2 Template has source, but not locals
+    if template.respond_to?(:source) && !template.respond_to?(:locals)
+      assigns = (@view.instance_variables - PROTECTED_INSTANCE_VARIABLES).inject({}) do |hash, ivar|
+                  hash[ivar[1..-1]] = @view.instance_variable_get(ivar)
+                  hash
+                end
+    else
+      assigns = @view.assigns.reject{ |k,v| PROTECTED_ASSIGNS.include?(k) }
+    end
+    
+    source = template.respond_to?(:source) ? template.source : template
+    local_assigns = (template.respond_to?(:locals) ? template.locals : local_assigns) || {}
+    
+    if content_for_layout = @view.instance_variable_get("@content_for_layout")
+      assigns['content_for_layout'] = content_for_layout
+    end
+    assigns.merge!(local_assigns.stringify_keys)
+    
+    liquid = Liquid::Template.parse(source)
+    liquid.render(assigns, :filters => [@view.controller.master_helper_module], :registers => {:action_view => @view, :controller => @view.controller})
+  end
+
+  def compilable?
+    false
+  end
+
+end
--- a/lib/liquid.rb
+++ b/lib/liquid.rb
@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 # Copyright (c) 2005 Tobias Luetke
 #
 # Permission is hereby granted, free of charge, to any person obtaining
@@ -22,68 +20,50 @@
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 module Liquid
+  WordRegex                   = RUBY_VERSION < "1.9" ? '\w' : '[[:word:]]'
  FilterSeparator             = /\|/
  ArgumentSeparator           = ','
  FilterArgumentSeparator     = ':'
  VariableAttributeSeparator  = '.'
-  WhitespaceControl           = '-'
  TagStart                    = /\{\%/
  TagEnd                      = /\%\}/
-  VariableSignature           = /\(?[\w\-\.\[\]]\)?/
-  VariableSegment             = /[\w\-]/
+  VariableSignature           = /\(?[#{WordRegex}\-\.\[\]]\)?/o
+  VariableSegment             = /[#{WordRegex}\-]/o
  VariableStart               = /\{\{/
  VariableEnd                 = /\}\}/
  VariableIncompleteEnd       = /\}\}?/
  QuotedString                = /"[^"]*"|'[^']*'/
  QuotedFragment              = /#{QuotedString}|(?:[^\s,\|'"]|#{QuotedString})+/o
-  TagAttributes               = /(\w+)\s*\:\s*(#{QuotedFragment})/o
-  AnyStartingTag              = /#{TagStart}|#{VariableStart}/o
-  PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/om
-  TemplateParser              = /(#{PartialTemplateParser}|#{AnyStartingTag})/om
+  StrictQuotedFragment        = /"[^"]+"|'[^']+'|[^\s|:,]+/
+  FirstFilterArgument         = /#{FilterArgumentSeparator}(?:#{StrictQuotedFragment})/o
+  OtherFilterArgument         = /#{ArgumentSeparator}(?:#{StrictQuotedFragment})/o
+  SpacelessFilter             = /^(?:'[^']+'|"[^"]+"|[^'"])*#{FilterSeparator}(?:#{StrictQuotedFragment})(?:#{FirstFilterArgument}(?:#{OtherFilterArgument})*)?/o
+  Expression                  = /(?:#{QuotedFragment}(?:#{SpacelessFilter})*)/o
+  TagAttributes               = /(#{WordRegex}+)\s*\:\s*(#{QuotedFragment})/o
+  AnyStartingTag              = /\{\{|\{\%/
+  PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/o
+  TemplateParser              = /(#{PartialTemplateParser}|#{AnyStartingTag})/o
  VariableParser              = /\[[^\]]+\]|#{VariableSegment}+\??/o
-
-  singleton_class.send(:attr_accessor, :cache_classes)
-  self.cache_classes = true
 end

-require "liquid/version"
-require 'liquid/parse_tree_visitor'
-require 'liquid/lexer'
-require 'liquid/parser'
-require 'liquid/i18n'
 require 'liquid/drop'
-require 'liquid/tablerowloop_drop'
-require 'liquid/forloop_drop'
 require 'liquid/extensions'
 require 'liquid/errors'
 require 'liquid/interrupts'
-require 'liquid/strainer_factory'
-require 'liquid/strainer_template'
-require 'liquid/expression'
+require 'liquid/strainer'
 require 'liquid/context'
-require 'liquid/parser_switching'
 require 'liquid/tag'
 require 'liquid/block'
-require 'liquid/block_body'
 require 'liquid/document'
 require 'liquid/variable'
-require 'liquid/variable_lookup'
-require 'liquid/range_lookup'
 require 'liquid/file_system'
-require 'liquid/resource_limits'
 require 'liquid/template'
+require 'liquid/htmltags'
 require 'liquid/standardfilters'
 require 'liquid/condition'
+require 'liquid/module_ex'
 require 'liquid/utils'
-require 'liquid/tokenizer'
-require 'liquid/parse_context'
-require 'liquid/partial_cache'
-require 'liquid/usage'
-require 'liquid/register'
-require 'liquid/static_registers'
-require 'liquid/template_factory'

 # Load all the tags of the standard library
 #
-Dir["#{__dir__}/liquid/tags/*.rb"].each { |f| require f }
-Dir["#{__dir__}/liquid/registers/*.rb"].each { |f| require f }
+Dir[File.dirname(__FILE__) + '/liquid/tags/*.rb'].each { |f| require f }
--- a/lib/liquid/block.rb
+++ b/lib/liquid/block.rb
@@ -1,80 +1,115 @@
-# frozen_string_literal: true
-
 module Liquid
-  class Block < Tag
-    MAX_DEPTH = 100

-    def initialize(tag_name, markup, options)
-      super
-      @blank = true
-    end
+  class Block < Tag
+    IsTag             = /^#{TagStart}/o
+    IsVariable        = /^#{VariableStart}/o
+    FullToken         = /^#{TagStart}\s*(#{WordRegex}+)\s*(.*)?#{TagEnd}$/o
+    ContentOfVariable = /^#{VariableStart}(.*)#{VariableEnd}$/o

    def parse(tokens)
-      @body = BlockBody.new
-      while parse_body(@body, tokens)
+      @nodelist ||= []
+      @nodelist.clear
+
+      while token = tokens.shift
+
+        case token
+        when IsTag
+          if token =~ FullToken
+
+            # if we found the proper block delimitor just end parsing here and let the outer block
+            # proceed
+            if block_delimiter == $1
+              end_tag
+              return
+            end
+
+            # fetch the tag from registered blocks
+            if tag = Template.tags[$1]
+              @nodelist << tag.new($1, $2, tokens)
+            else
+              # this tag is not registered with the system
+              # pass it to the current block for special handling or error reporting
+              unknown_tag($1, $2, tokens)
+            end
+          else
+            raise SyntaxError, "Tag '#{token}' was not properly terminated with regexp: #{TagEnd.inspect} "
+          end
+        when IsVariable
+          @nodelist << create_variable(token)
+        when ''
+          # pass
+        else
+          @nodelist << token
+        end
      end
+
+      # Make sure that its ok to end parsing in the current block.
+      # Effectively this method will throw and exception unless the current block is
+      # of type Document
+      assert_missing_delimitation!
    end

-    # For backwards compatibility
-    def render(context)
-      @body.render(context)
+    def end_tag
    end

-    def blank?
-      @blank
-    end
-
-    def nodelist
-      @body.nodelist
-    end
-
-    def unknown_tag(tag, _params, _tokens)
-      if tag == 'else'
-        raise SyntaxError, parse_context.locale.t("errors.syntax.unexpected_else",
-          block_name: block_name)
-      elsif tag.start_with?('end')
-        raise SyntaxError, parse_context.locale.t("errors.syntax.invalid_delimiter",
-          tag: tag,
-          block_name: block_name,
-          block_delimiter: block_delimiter)
+    def unknown_tag(tag, params, tokens)
+      case tag
+      when 'else'
+        raise SyntaxError, "#{block_name} tag does not expect else tag"
+      when 'end'
+        raise SyntaxError, "'end' is not a valid delimiter for #{block_name} tags. use #{block_delimiter}"
      else
-        raise SyntaxError, parse_context.locale.t("errors.syntax.unknown_tag", tag: tag)
+        raise SyntaxError, "Unknown tag '#{tag}'"
      end
    end

+    def block_delimiter
+      "end#{block_name}"
+    end
+
    def block_name
      @tag_name
    end

-    def block_delimiter
-      @block_delimiter ||= "end#{block_name}"
+    def create_variable(token)
+      token.scan(ContentOfVariable) do |content|
+        return Variable.new(content.first)
+      end
+      raise SyntaxError.new("Variable '#{token}' was not properly terminated with regexp: #{VariableEnd.inspect} ")
+    end
+
+    def render(context)
+      render_all(@nodelist, context)
    end

    protected

-    def parse_body(body, tokens)
-      if parse_context.depth >= MAX_DEPTH
-        raise StackLevelError, "Nesting too deep"
-      end
-      parse_context.depth += 1
-      begin
-        body.parse(tokens, parse_context) do |end_tag_name, end_tag_params|
-          @blank &&= body.blank?
+    def assert_missing_delimitation!
+      raise SyntaxError.new("#{block_name} tag was never closed")
+    end

-          return false if end_tag_name == block_delimiter
-          unless end_tag_name
-            raise SyntaxError, parse_context.locale.t("errors.syntax.tag_never_closed", block_name: block_name)
+    def render_all(list, context)
+      output = []
+      list.each do |token|
+        # Break out if we have any unhanded interrupts.
+        break if context.has_interrupt?
+
+        begin
+          # If we get an Interrupt that means the block must stop processing. An
+          # Interrupt is any command that stops block execution such as {% break %} 
+          # or {% continue %}
+          if token.is_a? Continue or token.is_a? Break
+            context.push_interrupt(token.interrupt)
+            break
          end

-          # this tag is not registered with the system
-          # pass it to the current block for special handling or error reporting
-          unknown_tag(end_tag_name, end_tag_params, tokens)
+          output << (token.respond_to?(:render) ? token.render(context) : token)
+        rescue ::StandardError => e
+          output << (context.handle_error(e))
        end
-      ensure
-        parse_context.depth -= 1
      end

-      true
+      output.join
    end
  end
 end
--- a/lib/liquid/block_body.rb
+++ b/lib/liquid/block_body.rb
@@ -1,219 +0,0 @@
-# frozen_string_literal: true
-
-require 'English'
-
-module Liquid
-  class BlockBody
-    LiquidTagToken      = /\A\s*(\w+)\s*(.*?)\z/o
-    FullToken           = /\A#{TagStart}#{WhitespaceControl}?(\s*)(\w+)(\s*)(.*?)#{WhitespaceControl}?#{TagEnd}\z/om
-    ContentOfVariable   = /\A#{VariableStart}#{WhitespaceControl}?(.*?)#{WhitespaceControl}?#{VariableEnd}\z/om
-    WhitespaceOrNothing = /\A\s*\z/
-    TAGSTART            = "{%"
-    VARSTART            = "{{"
-
-    attr_reader :nodelist
-
-    def initialize
-      @nodelist = []
-      @blank    = true
-    end
-
-    def parse(tokenizer, parse_context, &block)
-      parse_context.line_number = tokenizer.line_number
-
-      if tokenizer.for_liquid_tag
-        parse_for_liquid_tag(tokenizer, parse_context, &block)
-      else
-        parse_for_document(tokenizer, parse_context, &block)
-      end
-    end
-
-    private def parse_for_liquid_tag(tokenizer, parse_context)
-      while (token = tokenizer.shift)
-        unless token.empty? || token =~ WhitespaceOrNothing
-          unless token =~ LiquidTagToken
-            # line isn't empty but didn't match tag syntax, yield and let the
-            # caller raise a syntax error
-            return yield token, token
-          end
-          tag_name = Regexp.last_match(1)
-          markup   = Regexp.last_match(2)
-          unless (tag = registered_tags[tag_name])
-            # end parsing if we reach an unknown tag and let the caller decide
-            # determine how to proceed
-            return yield tag_name, markup
-          end
-          new_tag = tag.parse(tag_name, markup, tokenizer, parse_context)
-          @blank &&= new_tag.blank?
-          @nodelist << new_tag
-        end
-        parse_context.line_number = tokenizer.line_number
-      end
-
-      yield nil, nil
-    end
-
-    # @api private
-    def self.unknown_tag_in_liquid_tag(end_tag_name, end_tag_markup)
-      yield end_tag_name, end_tag_markup
-    ensure
-      Usage.increment("liquid_tag_contains_outer_tag") unless $ERROR_INFO.is_a?(SyntaxError)
-    end
-
-    private def parse_liquid_tag(markup, parse_context, &block)
-      liquid_tag_tokenizer = Tokenizer.new(markup, line_number: parse_context.line_number, for_liquid_tag: true)
-      parse_for_liquid_tag(liquid_tag_tokenizer, parse_context) do |end_tag_name, end_tag_markup|
-        next unless end_tag_name
-        self.class.unknown_tag_in_liquid_tag(end_tag_name, end_tag_markup, &block)
-      end
-    end
-
-    private def parse_for_document(tokenizer, parse_context, &block)
-      while (token = tokenizer.shift)
-        next if token.empty?
-        case
-        when token.start_with?(TAGSTART)
-          whitespace_handler(token, parse_context)
-          unless token =~ FullToken
-            raise_missing_tag_terminator(token, parse_context)
-          end
-          tag_name = Regexp.last_match(2)
-          markup   = Regexp.last_match(4)
-
-          if parse_context.line_number
-            # newlines inside the tag should increase the line number,
-            # particularly important for multiline {% liquid %} tags
-            parse_context.line_number += Regexp.last_match(1).count("\n") + Regexp.last_match(3).count("\n")
-          end
-
-          if tag_name == 'liquid'
-            parse_liquid_tag(markup, parse_context, &block)
-            next
-          end
-
-          unless (tag = registered_tags[tag_name])
-            # end parsing if we reach an unknown tag and let the caller decide
-            # determine how to proceed
-            return yield tag_name, markup
-          end
-          new_tag = tag.parse(tag_name, markup, tokenizer, parse_context)
-          @blank &&= new_tag.blank?
-          @nodelist << new_tag
-        when token.start_with?(VARSTART)
-          whitespace_handler(token, parse_context)
-          @nodelist << create_variable(token, parse_context)
-          @blank = false
-        else
-          if parse_context.trim_whitespace
-            token.lstrip!
-          end
-          parse_context.trim_whitespace = false
-          @nodelist << token
-          @blank &&= !!(token =~ WhitespaceOrNothing)
-        end
-        parse_context.line_number = tokenizer.line_number
-      end
-
-      yield nil, nil
-    end
-
-    def whitespace_handler(token, parse_context)
-      if token[2] == WhitespaceControl
-        previous_token = @nodelist.last
-        if previous_token.is_a?(String)
-          previous_token.rstrip!
-        end
-      end
-      parse_context.trim_whitespace = (token[-3] == WhitespaceControl)
-    end
-
-    def blank?
-      @blank
-    end
-
-    def render(context)
-      render_to_output_buffer(context, +'')
-    end
-
-    def render_to_output_buffer(context, output)
-      context.resource_limits.render_score += @nodelist.length
-
-      idx = 0
-      while (node = @nodelist[idx])
-        previous_output_size = output.bytesize
-
-        case node
-        when String
-          output << node
-        when Variable
-          render_node(context, output, node)
-        when Block
-          render_node(context, node.blank? ? +'' : output, node)
-          break if context.interrupt? # might have happened in a for-block
-        when Continue, Break
-          # If we get an Interrupt that means the block must stop processing. An
-          # Interrupt is any command that stops block execution such as {% break %}
-          # or {% continue %}
-          context.push_interrupt(node.interrupt)
-          break
-        else # Other non-Block tags
-          render_node(context, output, node)
-          break if context.interrupt? # might have happened through an include
-        end
-        idx += 1
-
-        raise_if_resource_limits_reached(context, output.bytesize - previous_output_size)
-      end
-
-      output
-    end
-
-    private
-
-    def render_node(context, output, node)
-      if node.disabled?(context)
-        output << node.disabled_error_message
-        return
-      end
-      disable_tags(context, node.disabled_tags) do
-        node.render_to_output_buffer(context, output)
-      end
-    rescue UndefinedVariable, UndefinedDropMethod, UndefinedFilter => e
-      context.handle_error(e, node.line_number)
-    rescue ::StandardError => e
-      line_number = node.is_a?(String) ? nil : node.line_number
-      output << context.handle_error(e, line_number)
-    end
-
-    def disable_tags(context, tags, &block)
-      return yield if tags.empty?
-      context.registers[:disabled_tags].disable(tags, &block)
-    end
-
-    def raise_if_resource_limits_reached(context, length)
-      context.resource_limits.render_length += length
-      return unless context.resource_limits.reached?
-      raise MemoryError, "Memory limits exceeded"
-    end
-
-    def create_variable(token, parse_context)
-      token.scan(ContentOfVariable) do |content|
-        markup = content.first
-        return Variable.new(markup, parse_context)
-      end
-      raise_missing_variable_terminator(token, parse_context)
-    end
-
-    def raise_missing_tag_terminator(token, parse_context)
-      raise SyntaxError, parse_context.locale.t("errors.syntax.tag_termination", token: token, tag_end: TagEnd.inspect)
-    end
-
-    def raise_missing_variable_terminator(token, parse_context)
-      raise SyntaxError, parse_context.locale.t("errors.syntax.variable_termination", token: token, tag_end: VariableEnd.inspect)
-    end
-
-    def registered_tags
-      Template.tags
-    end
-  end
-end
--- a/lib/liquid/condition.rb
+++ b/lib/liquid/condition.rb
@@ -1,75 +1,55 @@
-# frozen_string_literal: true
-
 module Liquid
  # Container for liquid nodes which conveniently wraps decision making logic
  #
  # Example:
  #
-  #   c = Condition.new(1, '==', 1)
+  #   c = Condition.new('1', '==', '1')
  #   c.evaluate #=> true
  #
  class Condition #:nodoc:
    @@operators = {
-      '==' => ->(cond, left, right) {  cond.send(:equal_variables, left, right) },
-      '!=' => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
-      '<>' => ->(cond, left, right) { !cond.send(:equal_variables, left, right) },
-      '<' => :<,
-      '>' => :>,
+      '==' => lambda { |cond, left, right|  cond.send(:equal_variables, left, right) },
+      '!=' => lambda { |cond, left, right| !cond.send(:equal_variables, left, right) },
+      '<>' => lambda { |cond, left, right| !cond.send(:equal_variables, left, right) },
+      '<'  => :<,
+      '>'  => :>,
      '>=' => :>=,
      '<=' => :<=,
-      'contains' => lambda do |_cond, left, right|
-        if left && right && left.respond_to?(:include?)
-          right = right.to_s if left.is_a?(String)
-          left.include?(right)
-        else
-          false
-        end
-      end,
+      'contains' => lambda { |cond, left, right| left && right ? left.include?(right) : false }
    }

    def self.operators
      @@operators
    end

-    attr_reader :attachment, :child_condition
+    attr_reader :attachment
    attr_accessor :left, :operator, :right

    def initialize(left = nil, operator = nil, right = nil)
-      @left     = left
-      @operator = operator
-      @right    = right
-
+      @left, @operator, @right = left, operator, right
      @child_relation  = nil
      @child_condition = nil
    end

    def evaluate(context = Context.new)
-      condition = self
-      result = nil
-      loop do
-        result = interpret_condition(condition.left, condition.right, condition.operator, context)
+      result = interpret_condition(left, right, operator, context)

-        case condition.child_relation
-        when :or
-          break if result
-        when :and
-          break unless result
-        else
-          break
-        end
-        condition = condition.child_condition
+      case @child_relation
+      when :or
+        result || @child_condition.evaluate(context)
+      when :and
+        result && @child_condition.evaluate(context)
+      else
+        result
      end
-      result
    end

    def or(condition)
-      @child_relation  = :or
-      @child_condition = condition
+      @child_relation, @child_condition = :or, condition
    end

    def and(condition)
-      @child_relation  = :and
-      @child_condition = condition
+      @child_relation, @child_condition = :and, condition
    end

    def attach(attachment)
@@ -84,24 +64,20 @@ module Liquid
      "#<Condition #{[@left, @operator, @right].compact.join(' ')}>"
    end

-    protected
-
-    attr_reader :child_relation
-
    private

    def equal_variables(left, right)
-      if left.is_a?(Liquid::Expression::MethodLiteral)
-        if right.respond_to?(left.method_name)
-          return right.send(left.method_name)
+      if left.is_a?(Symbol)
+        if right.respond_to?(left)
+          return right.send(left.to_s)
        else
          return nil
        end
      end

-      if right.is_a?(Liquid::Expression::MethodLiteral)
-        if left.respond_to?(right.method_name)
-          return left.send(right.method_name)
+      if right.is_a?(Symbol)
+        if left.respond_to?(right)
+          return left.send(right.to_s)
        else
          return nil
        end
@@ -114,41 +90,31 @@ module Liquid
      # If the operator is empty this means that the decision statement is just
      # a single variable. We can just poll this variable from the context and
      # return this as the result.
-      return context.evaluate(left) if op.nil?
+      return context[left] if op == nil

-      left  = context.evaluate(left)
-      right = context.evaluate(right)
+      left, right = context[left], context[right]

-      operation = self.class.operators[op] || raise(Liquid::ArgumentError, "Unknown operator #{op}")
+      operation = self.class.operators[op] || raise(ArgumentError.new("Unknown operator #{op}"))

      if operation.respond_to?(:call)
        operation.call(self, left, right)
-      elsif left.respond_to?(operation) && right.respond_to?(operation) && !left.is_a?(Hash) && !right.is_a?(Hash)
-        begin
-          left.send(operation, right)
-        rescue ::ArgumentError => e
-          raise Liquid::ArgumentError, e.message
-        end
-      end
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [
-          @node.left, @node.right,
-          @node.child_condition, @node.attachment
-        ].compact
+      elsif left.respond_to?(operation) and right.respond_to?(operation)
+        left.send(operation, right)
+      else
+        nil
      end
    end
  end

+
  class ElseCondition < Condition
    def else?
      true
    end

-    def evaluate(_context)
+    def evaluate(context)
      true
    end
  end
+
 end
--- a/lib/liquid/context.rb
+++ b/lib/liquid/context.rb
@@ -1,6 +1,6 @@
-# frozen_string_literal: true
-
 module Liquid
+
+  
  # Context keeps the variable stack and resolves variables, as well as keywords
  #
  #   context['variable'] = 'testing'
@@ -14,45 +14,22 @@ module Liquid
  #
  #   context['bob']  #=> nil  class Context
  class Context
-    attr_reader :scopes, :errors, :registers, :environments, :resource_limits, :static_registers, :static_environments
-    attr_accessor :exception_renderer, :template_name, :partial, :global_filter, :strict_variables, :strict_filters
+    attr_reader :scopes, :errors, :registers, :environments

-    # rubocop:disable Metrics/ParameterLists
-    def self.build(environments: {}, outer_scope: {}, registers: {}, rethrow_errors: false, resource_limits: nil, static_environments: {})
-      new(environments, outer_scope, registers, rethrow_errors, resource_limits, static_environments)
-    end
-
-    def initialize(environments = {}, outer_scope = {}, registers = {}, rethrow_errors = false, resource_limits = nil, static_environments = {})
-      @environments = [environments]
-      @environments.flatten!
-
-      @static_environments = [static_environments].flat_map(&:freeze).freeze
-      @scopes              = [(outer_scope || {})]
-      @registers           = registers
-      @errors              = []
-      @partial             = false
-      @strict_variables    = false
-      @resource_limits     = resource_limits || ResourceLimits.new(Template.default_resource_limits)
-      @base_scope_depth    = 0
+    def initialize(environments = {}, outer_scope = {}, registers = {}, rethrow_errors = false)
+      @environments   = [environments].flatten
+      @scopes         = [(outer_scope || {})]
+      @registers      = registers
+      @errors         = []
+      @rethrow_errors = rethrow_errors
      squash_instance_assigns_with_environments

-      self.exception_renderer = Template.default_exception_renderer
-      if rethrow_errors
-        self.exception_renderer = ->(_e) { raise }
-      end
-
-      @interrupts    = []
-      @filters       = []
-      @global_filter = nil
-    end
-    # rubocop:enable Metrics/ParameterLists
-
-    def warnings
-      @warnings ||= []
+      @interrupts = []
+      @variable_cache = {}
    end

    def strainer
-      @strainer ||= StrainerFactory.create(self, @filters)
+      @strainer ||= Strainer.create(self)
    end

    # Adds filters to this context.
@@ -61,16 +38,16 @@ module Liquid
    # for that
    def add_filters(filters)
      filters = [filters].flatten.compact
-      @filters += filters
-      @strainer = nil
-    end

-    def apply_global_filter(obj)
-      global_filter.nil? ? obj : global_filter.call(obj)
+      filters.each do |f|
+        raise ArgumentError, "Expected module but got: #{f.class}" unless f.is_a?(Module)
+        Strainer.add_known_filter(f)
+        strainer.extend(f)
+      end
    end

    # are there any not handled interrupts?
-    def interrupt?
+    def has_interrupt?
      !@interrupts.empty?
    end

@@ -84,31 +61,38 @@ module Liquid
      @interrupts.pop
    end

-    def handle_error(e, line_number = nil)
-      e = internal_error unless e.is_a?(Liquid::Error)
-      e.template_name ||= template_name
-      e.line_number   ||= line_number
+    def handle_error(e)
      errors.push(e)
-      exception_renderer.call(e).to_s
+      raise if @rethrow_errors
+
+      case e
+      when SyntaxError
+        "Liquid syntax error: #{e.message}"
+      else
+        "Liquid error: #{e.message}"
+      end
    end

    def invoke(method, *args)
-      strainer.invoke(method, *args).to_liquid
+      strainer.invoke(method, *args)
    end

    # Push new local scope on the stack. use <tt>Context#stack</tt> instead
-    def push(new_scope = {})
+    def push(new_scope={})
+      @variable_cache = {}
      @scopes.unshift(new_scope)
-      check_overflow
+      raise StackLevelError, "Nesting too deep" if @scopes.length > 100
    end

    # Merge a hash of variables in the current local scope
    def merge(new_scopes)
+      @variable_cache = {}
      @scopes[0].merge!(new_scopes)
    end

    # Pop from the stack. use <tt>Context#stack</tt> instead
    def pop
+      @variable_cache = {}
      raise ContextError if @scopes.size == 1
      @scopes.shift
    end
@@ -121,40 +105,20 @@ module Liquid
    #   end
    #
    #   context['var]  #=> nil
-    def stack(new_scope = {})
+    def stack(new_scope={})
+      @variable_cache = {}
      push(new_scope)
      yield
    ensure
      pop
-    end
-
-    # Creates a new context inheriting resource limits, filters, environment etc.,
-    # but with an isolated scope.
-    def new_isolated_subcontext
-      check_overflow
-
-      Context.build(
-        resource_limits: resource_limits,
-        static_environments: static_environments,
-        registers: StaticRegisters.new(registers)
-      ).tap do |subcontext|
-        subcontext.base_scope_depth   = base_scope_depth + 1
-        subcontext.exception_renderer = exception_renderer
-        subcontext.filters  = @filters
-        subcontext.strainer = nil
-        subcontext.errors   = errors
-        subcontext.warnings = warnings
-      end
+      @variable_cache = {}
    end

    def clear_instance_assigns
+      @variable_cache = {}
      @scopes[0] = {}
    end

-    # Only allow String, Numeric, Hash, Array, Proc, Boolean or <tt>Liquid::Drop</tt>
-    def []=(key, value)
-      @scopes[0][key] = value
-    end

    # Look up variable, either resolve directly after considering the name. We can directly handle
    # Strings, digits, floats and booleans (true,false).
@@ -164,98 +128,145 @@ module Liquid
    #
    # Example:
    #   products == empty #=> products.empty?
-    def [](expression)
-      evaluate(Expression.parse(expression))
-    end
+    def resolve(key)        
+      case key
+      when nil, ""
+        return nil
+      when "blank"
+        return :blank?
+      when "empty"
+        return :empty?
+      end
+      
+      result = Parser.parse(key)   
+      stack = []

-    def key?(key)
-      self[key] != nil
-    end
+      result.each do |(sym, value)|          

-    def evaluate(object)
-      object.respond_to?(:evaluate) ? object.evaluate(self) : object
-    end
+        case sym
+        when :id
+          stack.push value
+        when :lookup
+          left = stack.pop
+          value = find_variable(left)
+          
+          stack.push(harden(value))
+        when :range
+          right = stack.pop.to_i
+          left  = stack.pop.to_i
+          
+          stack.push (left..right)
+        when :buildin
+          left = stack.pop
+          value = invoke_buildin(left, value)
+          
+          stack.push(harden(value))
+        when :call
+          left = stack.pop
+          right = stack.pop
+          value = lookup_and_evaluate(right, left)

-    # Fetches an object starting at the local scope and then moving up the hierachy
-    def find_variable(key, raise_on_not_found: true)
-      # This was changed from find() to find_index() because this is a very hot
-      # path and find_index() is optimized in MRI to reduce object allocation
-      index = @scopes.find_index { |s| s.key?(key) }
-
-      variable = if index
-        lookup_and_evaluate(@scopes[index], key, raise_on_not_found: raise_on_not_found)
-      else
-        try_variable_find_in_environments(key, raise_on_not_found: raise_on_not_found)
+          stack.push(harden(value))
+        else 
+          raise "unknown #{sym}"
+        end
      end

-      variable         = variable.to_liquid
-      variable.context = self if variable.respond_to?(:context=)
-
-      variable
+      return stack.first
    end

-    def lookup_and_evaluate(obj, key, raise_on_not_found: true)
-      if @strict_variables && raise_on_not_found && obj.respond_to?(:key?) && !obj.key?(key)
-        raise Liquid::UndefinedVariable, "undefined variable #{key}"
-      end

-      value = obj[key]
-
-      if value.is_a?(Proc) && obj.respond_to?(:[]=)
-        obj[key] = value.arity == 0 ? value.call : value.call(self)
-      else
-        value
-      end
+    # Only allow String, Numeric, Hash, Array, Proc, Boolean or <tt>Liquid::Drop</tt>
+    def []=(key, value)
+      @variable_cache[key] = value
+      @scopes[0][key] = value
    end

-    protected
+    def has_key?(key)
+      resolve(key) != nil
+    end

-    attr_writer :base_scope_depth, :warnings, :errors, :strainer, :filters
+    alias_method :[], :resolve

    private

-    attr_reader :base_scope_depth
+      def invoke_buildin(obj, key)
+        # as weird as this is, liquid unit tests demand that we prioritize hash lookups 
+        # to buildins. So if we got a hash and it has a :first element we need to call that 
+        # instead of sending the first message...

-    def try_variable_find_in_environments(key, raise_on_not_found:)
-      @environments.each do |environment|
-        found_variable = lookup_and_evaluate(environment, key, raise_on_not_found: raise_on_not_found)
-        if !found_variable.nil? || @strict_variables && raise_on_not_found
-          return found_variable
+        if obj.respond_to?(:has_key?) && obj.has_key?(key)
+          return lookup_and_evaluate(obj, key)
+        end
+
+        if obj.respond_to?(key) 
+          return obj.send(key)
+        else
+          return nil    
        end
      end
-      @static_environments.each do |environment|
-        found_variable = lookup_and_evaluate(environment, key, raise_on_not_found: raise_on_not_found)
-        if !found_variable.nil? || @strict_variables && raise_on_not_found
-          return found_variable
+
+      # Fetches an object starting at the local scope and then moving up the hierachy
+      def find_variable(key)
+        if val = @variable_cache[key]
+          return val
        end
-      end
-      nil
-    end

-    def check_overflow
-      raise StackLevelError, "Nesting too deep" if overflow?
-    end
+        scope = @scopes.find { |s| s.has_key?(key) }

-    def overflow?
-      base_scope_depth + @scopes.length > Block::MAX_DEPTH
-    end
-
-    def internal_error
-      # raise and catch to set backtrace and cause on exception
-      raise Liquid::InternalError, 'internal'
-    rescue Liquid::InternalError => exc
-      exc
-    end
-
-    def squash_instance_assigns_with_environments
-      @scopes.last.each_key do |k|
-        @environments.each do |env|
-          if env.key?(k)
-            scopes.last[k] = lookup_and_evaluate(env, k)
-            break
+        if scope.nil?
+          @environments.each do |e|
+            if variable = lookup_and_evaluate(e, key)
+              scope = e
+              break
+            end
          end
        end
+
+        scope     ||= @environments.last || @scopes.last
+        variable  ||= lookup_and_evaluate(scope, key)
+        @variable_cache[key] = variable
+
+        return variable
      end
-    end # squash_instance_assigns_with_environments
+
+      def lookup_and_evaluate(obj, key)
+        return nil unless obj.respond_to?(:[])
+        
+        if obj.is_a?(Array)
+          return nil unless key.is_a?(Integer)
+        end
+
+        value = obj[key]
+
+        if value.is_a?(Proc)      
+          # call the proc
+          value = (value.arity == 0) ? value.call : value.call(self)
+
+          # memozie if possible
+          obj[key] = value if obj.respond_to?(:[]=)
+        end
+
+        value
+      end
+
+      def harden(value)
+        value = value.to_liquid
+        value.context = self if value.respond_to?(:context=)
+        return value
+      end
+
+      def squash_instance_assigns_with_environments
+        @scopes.last.each_key do |k|
+          @environments.each do |env|
+            if env.has_key?(k)
+              scopes.last[k] = lookup_and_evaluate(env, k)
+              break
+            end
+          end
+        end
+      end # squash_instance_assigns_with_environments
+
  end # Context
+
 end # Liquid
--- a/lib/liquid/document.rb
+++ b/lib/liquid/document.rb
@@ -1,29 +1,17 @@
-# frozen_string_literal: true
-
 module Liquid
-  class Document < BlockBody
-    def self.parse(tokens, parse_context)
-      doc = new
-      doc.parse(tokens, parse_context)
-      doc
+  class Document < Block
+    # we don't need markup to open this block
+    def initialize(tokens)
+      parse(tokens)
    end

-    def parse(tokens, parse_context)
-      super do |end_tag_name, _end_tag_params|
-        unknown_tag(end_tag_name, parse_context) if end_tag_name
-      end
-    rescue SyntaxError => e
-      e.line_number ||= parse_context.line_number
-      raise
+    # There isn't a real delimter
+    def block_delimiter
+      []
    end

-    def unknown_tag(tag, parse_context)
-      case tag
-      when 'else', 'end'
-        raise SyntaxError, parse_context.locale.t("errors.syntax.unexpected_outer_tag", tag: tag)
-      else
-        raise SyntaxError, parse_context.locale.t("errors.syntax.unknown_tag", tag: tag)
-      end
+    # Document blocks don't need to be terminated since they are not actually opened
+    def assert_missing_delimitation!
    end
  end
 end
--- a/lib/liquid/drop.rb
+++ b/lib/liquid/drop.rb
@@ -1,8 +1,7 @@
-# frozen_string_literal: true
-
 require 'set'

 module Liquid
+
  # A drop in liquid is a class which allows you to export DOM like things to liquid.
  # Methods of drops are callable.
  # The main use for liquid drops is to implement lazy loaded objects.
@@ -20,61 +19,43 @@ module Liquid
  #   tmpl = Liquid::Template.parse( ' {% for product in product.top_sales %} {{ product.name }} {%endfor%} '  )
  #   tmpl.render('product' => ProductDrop.new ) # will invoke top_sales query.
  #
-  # Your drop can either implement the methods sans any parameters
-  # or implement the liquid_method_missing(name) method which is a catch all.
+  # Your drop can either implement the methods sans any parameters or implement the before_method(name) method which is a
+  # catch all.
  class Drop
    attr_writer :context

+    EMPTY_STRING = ''.freeze
+
    # Catch all for the method
-    def liquid_method_missing(method)
-      return nil unless @context&.strict_variables
-      raise Liquid::UndefinedDropMethod, "undefined method #{method}"
+    def before_method(method)
+      nil
    end

    # called by liquid to invoke a drop
    def invoke_drop(method_or_key)
-      if self.class.invokable?(method_or_key)
+      if method_or_key && method_or_key != EMPTY_STRING && self.class.invokable?(method_or_key)
        send(method_or_key)
      else
-        liquid_method_missing(method_or_key)
+        before_method(method_or_key)
      end
    end

-    def key?(_name)
+    def has_key?(name)
      true
    end

-    def inspect
-      self.class.to_s
-    end
-
    def to_liquid
      self
    end

-    def to_s
-      self.class.name
-    end
+    alias :[] :invoke_drop

-    alias_method :[], :invoke_drop
+    private

    # Check for method existence without invoking respond_to?, which creates symbols
    def self.invokable?(method_name)
-      invokable_methods.include?(method_name.to_s)
-    end
-
-    def self.invokable_methods
-      @invokable_methods ||= begin
-        blacklist = Liquid::Drop.public_instance_methods + [:each]
-
-        if include?(Enumerable)
-          blacklist += Enumerable.public_instance_methods
-          blacklist -= [:sort, :count, :first, :min, :max]
-        end
-
-        whitelist = [:to_liquid] + (public_instance_methods - blacklist)
-        Set.new(whitelist.map(&:to_s))
-      end
+      @invokable_methods ||= Set.new((public_instance_methods - Liquid::Drop.public_instance_methods).map(&:to_s))
+      @invokable_methods.include?(method_name.to_s)
    end
  end
 end
--- a/lib/liquid/errors.rb
+++ b/lib/liquid/errors.rb
@@ -1,58 +1,11 @@
-# frozen_string_literal: true
-
 module Liquid
-  class Error < ::StandardError
-    attr_accessor :line_number
-    attr_accessor :template_name
-    attr_accessor :markup_context
-
-    def to_s(with_prefix = true)
-      str = +""
-      str << message_prefix if with_prefix
-      str << super()
-
-      if markup_context
-        str << " "
-        str << markup_context
-      end
-
-      str
-    end
-
-    private
-
-    def message_prefix
-      str = +""
-      str << if is_a?(SyntaxError)
-        "Liquid syntax error"
-      else
-        "Liquid error"
-      end
-
-      if line_number
-        str << " ("
-        str << template_name << " " if template_name
-        str << "line " << line_number.to_s << ")"
-      end
-
-      str << ": "
-      str
-    end
-  end
-
-  ArgumentError       = Class.new(Error)
-  ContextError        = Class.new(Error)
-  FileSystemError     = Class.new(Error)
-  StandardError       = Class.new(Error)
-  SyntaxError         = Class.new(Error)
-  StackLevelError     = Class.new(Error)
-  TaintedError        = Class.new(Error)
-  MemoryError         = Class.new(Error)
-  ZeroDivisionError   = Class.new(Error)
-  FloatDomainError    = Class.new(Error)
-  UndefinedVariable   = Class.new(Error)
-  UndefinedDropMethod = Class.new(Error)
-  UndefinedFilter     = Class.new(Error)
-  MethodOverrideError = Class.new(Error)
-  InternalError       = Class.new(Error)
+  class Error < ::StandardError; end
+  
+  class ArgumentError < Error; end
+  class ContextError < Error; end
+  class FilterNotFound < Error; end
+  class FileSystemError < Error; end
+  class StandardError < Error; end
+  class SyntaxError < Error; end
+  class StackLevelError < Error; end
 end
--- a/lib/liquid/expression.rb
+++ b/lib/liquid/expression.rb
@@ -1,51 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class Expression
-    class MethodLiteral
-      attr_reader :method_name, :to_s
-
-      def initialize(method_name, to_s)
-        @method_name = method_name
-        @to_s = to_s
-      end
-
-      def to_liquid
-        to_s
-      end
-    end
-
-    LITERALS = {
-      nil => nil, 'nil' => nil, 'null' => nil, '' => nil,
-      'true' => true,
-      'false' => false,
-      'blank' => MethodLiteral.new(:blank?, '').freeze,
-      'empty' => MethodLiteral.new(:empty?, '').freeze
-    }.freeze
-
-    SINGLE_QUOTED_STRING = /\A'(.*)'\z/m
-    DOUBLE_QUOTED_STRING = /\A"(.*)"\z/m
-    INTEGERS_REGEX       = /\A(-?\d+)\z/
-    FLOATS_REGEX         = /\A(-?\d[\d\.]+)\z/
-    RANGES_REGEX         = /\A\((\S+)\.\.(\S+)\)\z/
-
-    def self.parse(markup)
-      if LITERALS.key?(markup)
-        LITERALS[markup]
-      else
-        case markup
-        when SINGLE_QUOTED_STRING, DOUBLE_QUOTED_STRING
-          Regexp.last_match(1)
-        when INTEGERS_REGEX
-          Regexp.last_match(1).to_i
-        when RANGES_REGEX
-          RangeLookup.parse(Regexp.last_match(1), Regexp.last_match(2))
-        when FLOATS_REGEX
-          Regexp.last_match(1).to_f
-        else
-          VariableLookup.parse(markup)
-        end
-      end
-    end
-  end
-end
--- a/lib/liquid/extensions.rb
+++ b/lib/liquid/extensions.rb
@@ -1,5 +1,3 @@
-# frozen_string_literal: true
-
 require 'time'
 require 'date'

@@ -9,56 +7,44 @@ class String # :nodoc:
  end
 end

-class Symbol # :nodoc:
-  def to_liquid
-    to_s
-  end
-end
-
-class Array # :nodoc:
+class Array  # :nodoc:
  def to_liquid
    self
  end
 end

-class Hash # :nodoc:
+class Hash  # :nodoc:
  def to_liquid
    self
  end
 end

-class Numeric # :nodoc:
+class Numeric  # :nodoc:
  def to_liquid
    self
  end
 end

-class Range # :nodoc:
+class Time  # :nodoc:
  def to_liquid
    self
  end
 end

-class Time # :nodoc:
+class DateTime < Date  # :nodoc:
  def to_liquid
    self
  end
 end

-class DateTime < Date # :nodoc:
-  def to_liquid
-    self
-  end
-end
-
-class Date # :nodoc:
+class Date  # :nodoc:
  def to_liquid
    self
  end
 end

 class TrueClass
-  def to_liquid # :nodoc:
+  def to_liquid  # :nodoc:
    self
  end
 end
--- a/lib/liquid/file_system.rb
+++ b/lib/liquid/file_system.rb
@@ -1,26 +1,24 @@
-# frozen_string_literal: true
-
 module Liquid
-  # A Liquid file system is a way to let your templates retrieve other templates for use with the include tag.
+  # A Liquid file system is way to let your templates retrieve other templates for use with the include tag.
  #
-  # You can implement subclasses that retrieve templates from the database, from the file system using a different
+  # You can implement subclasses that retrieve templates from the database, from the file system using a different 
  # path structure, you can provide them as hard-coded inline strings, or any manner that you see fit.
  #
  # You can add additional instance variables, arguments, or methods as needed.
  #
  # Example:
  #
-  #   Liquid::Template.file_system = Liquid::LocalFileSystem.new(template_path)
-  #   liquid = Liquid::Template.parse(template)
+  # Liquid::Template.file_system = Liquid::LocalFileSystem.new(template_path)
+  # liquid = Liquid::Template.parse(template)
  #
  # This will parse the template with a LocalFileSystem implementation rooted at 'template_path'.
  class BlankFileSystem
    # Called by Liquid to retrieve a template file
-    def read_template_file(_template_path)
+    def read_template_file(template_path, context)
      raise FileSystemError, "This liquid context does not allow includes."
    end
  end
-
+  
  # This implements an abstract file system which retrieves template files named in a manner similar to Rails partials,
  # ie. with the template name prefixed with an underscore. The extension ".liquid" is also added.
  #
@@ -28,48 +26,37 @@ module Liquid
  #
  # Example:
  #
-  #   file_system = Liquid::LocalFileSystem.new("/some/path")
-  #
-  #   file_system.full_path("mypartial")       # => "/some/path/_mypartial.liquid"
-  #   file_system.full_path("dir/mypartial")   # => "/some/path/dir/_mypartial.liquid"
-  #
-  # Optionally in the second argument you can specify a custom pattern for template filenames.
-  # The Kernel::sprintf format specification is used.
-  # Default pattern is "_%s.liquid".
-  #
-  # Example:
-  #
-  #   file_system = Liquid::LocalFileSystem.new("/some/path", "%s.html")
-  #
-  #   file_system.full_path("index") # => "/some/path/index.html"
+  # file_system = Liquid::LocalFileSystem.new("/some/path")
+  # 
+  # file_system.full_path("mypartial")       # => "/some/path/_mypartial.liquid"
+  # file_system.full_path("dir/mypartial")   # => "/some/path/dir/_mypartial.liquid"
  #
  class LocalFileSystem
    attr_accessor :root
-
-    def initialize(root, pattern = "_%s.liquid")
-      @root    = root
-      @pattern = pattern
+    
+    def initialize(root)
+      @root = root
    end
-
-    def read_template_file(template_path)
+    
+    def read_template_file(template_path, context)
      full_path = full_path(template_path)
-      raise FileSystemError, "No such template '#{template_path}'" unless File.exist?(full_path)
-
+      raise FileSystemError, "No such template '#{template_path}'" unless File.exists?(full_path)
+      
      File.read(full_path)
    end
-
+    
    def full_path(template_path)
-      raise FileSystemError, "Illegal template name '#{template_path}'" unless %r{\A[^./][a-zA-Z0-9_/]+\z}.match?(template_path)
-
+      raise FileSystemError, "Illegal template name '#{template_path}'" unless template_path =~ /^[^.\/][a-zA-Z0-9_\/]+$/
+      
      full_path = if template_path.include?('/')
-        File.join(root, File.dirname(template_path), @pattern % File.basename(template_path))
+        File.join(root, File.dirname(template_path), "_#{File.basename(template_path)}.liquid")
      else
-        File.join(root, @pattern % template_path)
+        File.join(root, "_#{template_path}.liquid")
      end
-
-      raise FileSystemError, "Illegal template path '#{File.expand_path(full_path)}'" unless File.expand_path(full_path).start_with?(File.expand_path(root))
-
+      
+      raise FileSystemError, "Illegal template path '#{File.expand_path(full_path)}'" unless File.expand_path(full_path) =~ /^#{File.expand_path(root)}/
+      
      full_path
    end
  end
-end
+end
--- a/lib/liquid/forloop_drop.rb
+++ b/lib/liquid/forloop_drop.rb
@@ -1,44 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class ForloopDrop < Drop
-    def initialize(name, length, parentloop)
-      @name       = name
-      @length     = length
-      @parentloop = parentloop
-      @index      = 0
-    end
-
-    attr_reader :name, :length, :parentloop
-
-    def index
-      @index + 1
-    end
-
-    def index0
-      @index
-    end
-
-    def rindex
-      @length - @index
-    end
-
-    def rindex0
-      @length - @index - 1
-    end
-
-    def first
-      @index == 0
-    end
-
-    def last
-      @index == @length - 1
-    end
-
-    protected
-
-    def increment!
-      @index += 1
-    end
-  end
-end
--- a/lib/liquid/htmltags.rb
+++ b/lib/liquid/htmltags.rb
@@ -0,0 +1,74 @@
+module Liquid
+  class TableRow < Block
+    Syntax = /(#{WordRegex}+)\s+in\s+(#{QuotedFragment}+)/o
+
+    def initialize(tag_name, markup, tokens)
+      if markup =~ Syntax
+        @variable_name = $1
+        @collection_name = $2
+        @attributes = {}
+        markup.scan(TagAttributes) do |key, value|
+          @attributes[key] = value
+        end
+      else
+        raise SyntaxError.new("Syntax Error in 'table_row loop' - Valid syntax: table_row [item] in [collection] cols=3")
+      end
+
+      super
+    end
+
+    def render(context)
+      collection = context[@collection_name] or return ''
+
+      from = @attributes['offset'] ? context[@attributes['offset']].to_i : 0
+      to = @attributes['limit'] ? from + context[@attributes['limit']].to_i : nil
+
+      collection = Utils.slice_collection_using_each(collection, from, to)
+
+      length = collection.length
+
+      cols = context[@attributes['cols']].to_i
+
+      row = 1
+      col = 0
+
+      result = "<tr class=\"row1\">\n"
+      context.stack do
+
+        collection.each_with_index do |item, index|
+          context[@variable_name] = item
+          context['tablerowloop'] = {
+            'length'  => length,
+            'index'   => index + 1,
+            'index0'  => index,
+            'col'     => col + 1,
+            'col0'    => col,
+            'index0'  => index,
+            'rindex'  => length - index,
+            'rindex0' => length - index - 1,
+            'first'   => (index == 0),
+            'last'    => (index == length - 1),
+            'col_first' => (col == 0),
+            'col_last'  => (col == cols - 1)
+          }
+
+
+          col += 1
+
+          result << "<td class=\"col#{col}\">" << render_all(@nodelist, context) << '</td>'
+
+          if col == cols and not (index == length - 1)
+            col  = 0
+            row += 1
+            result << "</tr>\n<tr class=\"row#{row}\">"
+          end
+
+        end
+      end
+      result << "</tr>\n"
+      result
+    end
+  end
+
+  Template.register_tag('tablerow', TableRow)
+end
--- a/lib/liquid/i18n.rb
+++ b/lib/liquid/i18n.rb
@@ -1,41 +0,0 @@
-# frozen_string_literal: true
-
-require 'yaml'
-
-module Liquid
-  class I18n
-    DEFAULT_LOCALE = File.join(File.expand_path(__dir__), "locales", "en.yml")
-
-    TranslationError = Class.new(StandardError)
-
-    attr_reader :path
-
-    def initialize(path = DEFAULT_LOCALE)
-      @path = path
-    end
-
-    def translate(name, vars = {})
-      interpolate(deep_fetch_translation(name), vars)
-    end
-    alias_method :t, :translate
-
-    def locale
-      @locale ||= YAML.load_file(@path)
-    end
-
-    private
-
-    def interpolate(name, vars)
-      name.gsub(/%\{(\w+)\}/) do
-        # raise TranslationError, "Undefined key #{$1} for interpolation in translation #{name}"  unless vars[$1.to_sym]
-        (vars[Regexp.last_match(1).to_sym]).to_s
-      end
-    end
-
-    def deep_fetch_translation(name)
-      name.split('.').reduce(locale) do |level, cur|
-        level[cur] || raise(TranslationError, "Translation for #{name} does not exist in locale #{path}")
-      end
-    end
-  end
-end
--- a/lib/liquid/interrupts.rb
+++ b/lib/liquid/interrupts.rb
@@ -1,11 +1,10 @@
-# frozen_string_literal: true
-
 module Liquid
+
  # An interrupt is any command that breaks processing of a block (ex: a for loop).
  class Interrupt
    attr_reader :message

-    def initialize(message = nil)
+    def initialize(message=nil)
      @message = message || "interrupt"
    end
  end
--- a/lib/liquid/lexer.rb
+++ b/lib/liquid/lexer.rb
@@ -1,62 +0,0 @@
-# frozen_string_literal: true
-
-require "strscan"
-module Liquid
-  class Lexer
-    SPECIALS = {
-      '|' => :pipe,
-      '.' => :dot,
-      ':' => :colon,
-      ',' => :comma,
-      '[' => :open_square,
-      ']' => :close_square,
-      '(' => :open_round,
-      ')' => :close_round,
-      '?' => :question,
-      '-' => :dash,
-    }.freeze
-    IDENTIFIER            = /[a-zA-Z_][\w-]*\??/
-    SINGLE_STRING_LITERAL = /'[^\']*'/
-    DOUBLE_STRING_LITERAL = /"[^\"]*"/
-    NUMBER_LITERAL        = /-?\d+(\.\d+)?/
-    DOTDOT                = /\.\./
-    COMPARISON_OPERATOR   = /==|!=|<>|<=?|>=?|contains(?=\s)/
-    WHITESPACE_OR_NOTHING = /\s*/
-
-    def initialize(input)
-      @ss = StringScanner.new(input)
-    end
-
-    def tokenize
-      @output = []
-
-      until @ss.eos?
-        @ss.skip(WHITESPACE_OR_NOTHING)
-        break if @ss.eos?
-        tok      = if (t = @ss.scan(COMPARISON_OPERATOR))
-          [:comparison, t]
-        elsif (t = @ss.scan(SINGLE_STRING_LITERAL))
-          [:string, t]
-        elsif (t = @ss.scan(DOUBLE_STRING_LITERAL))
-          [:string, t]
-        elsif (t = @ss.scan(NUMBER_LITERAL))
-          [:number, t]
-        elsif (t = @ss.scan(IDENTIFIER))
-          [:id, t]
-        elsif (t = @ss.scan(DOTDOT))
-          [:dotdot, t]
-        else
-          c     = @ss.getch
-          if (s = SPECIALS[c])
-            [s, c]
-          else
-            raise SyntaxError, "Unexpected character #{c}"
-          end
-        end
-        @output << tok
-      end
-
-      @output << [:end_of_string]
-    end
-  end
-end
--- a/lib/liquid/locales/en.yml
+++ b/lib/liquid/locales/en.yml
@@ -1,29 +0,0 @@
---
-  errors:
-    syntax:
-      tag_unexpected_args: "Syntax Error in '%{tag}' - Valid syntax: %{tag}"
-      assign: "Syntax Error in 'assign' - Valid syntax: assign [var] = [source]"
-      capture: "Syntax Error in 'capture' - Valid syntax: capture [var]"
-      case: "Syntax Error in 'case' - Valid syntax: case [condition]"
-      case_invalid_when: "Syntax Error in tag 'case' - Valid when condition: {% when [condition] [or condition2...] %}"
-      case_invalid_else: "Syntax Error in tag 'case' - Valid else condition: {% else %} (no parameters) "
-      cycle: "Syntax Error in 'cycle' - Valid syntax: cycle [name :] var [, var2, var3 ...]"
-      for: "Syntax Error in 'for loop' - Valid syntax: for [item] in [collection]"
-      for_invalid_in: "For loops require an 'in' clause"
-      for_invalid_attribute: "Invalid attribute in for loop. Valid attributes are limit and offset"
-      if: "Syntax Error in tag 'if' - Valid syntax: if [expression]"
-      include: "Error in tag 'include' - Valid syntax: include '[template]' (with|for) [object|collection]"
-      unknown_tag: "Unknown tag '%{tag}'"
-      invalid_delimiter: "'%{tag}' is not a valid delimiter for %{block_name} tags. use %{block_delimiter}"
-      unexpected_else: "%{block_name} tag does not expect 'else' tag"
-      unexpected_outer_tag: "Unexpected outer '%{tag}' tag"
-      tag_termination: "Tag '%{token}' was not properly terminated with regexp: %{tag_end}"
-      variable_termination: "Variable '%{token}' was not properly terminated with regexp: %{tag_end}"
-      tag_never_closed: "'%{block_name}' tag was never closed"
-      meta_syntax_error: "Liquid syntax error: #{e.message}"
-      table_row: "Syntax Error in 'table_row loop' - Valid syntax: table_row [item] in [collection] cols=3"
-      render: "Syntax error in tag 'render' - Template name must be a quoted string"
-    argument:
-      include: "Argument error in tag 'include' - Illegal template name"
-    disabled:
-      tag: "usage is not allowed in this context"
--- a/lib/liquid/module_ex.rb
+++ b/lib/liquid/module_ex.rb
@@ -0,0 +1,62 @@
+# Copyright 2007 by Domizio Demichelis
+# This library is free software. It may be used, redistributed and/or modified
+# under the same terms as Ruby itself
+#
+# This extension is usesd in order to expose the object of the implementing class
+# to liquid as it were a Drop. It also limits the liquid-callable methods of the instance
+# to the allowed method passed with the liquid_methods call
+# Example:
+#
+# class SomeClass
+#   liquid_methods :an_allowed_method
+#
+#   def an_allowed_method
+#     'this comes from an allowed method'
+#   end
+#   def unallowed_method
+#     'this will never be an output'
+#   end
+# end
+#
+# if you want to extend the drop to other methods you can defines more methods
+# in the class <YourClass>::LiquidDropClass
+#
+#   class SomeClass::LiquidDropClass
+#     def another_allowed_method
+#       'and this from another allowed method'
+#     end
+#   end
+# end
+#
+# usage:
+# @something = SomeClass.new
+#
+# template:
+# {{something.an_allowed_method}}{{something.unallowed_method}} {{something.another_allowed_method}}
+#
+# output:
+# 'this comes from an allowed method and this from another allowed method'
+#
+# You can also chain associations, by adding the liquid_method call in the
+# association models.
+#
+class Module
+
+  def liquid_methods(*allowed_methods)
+    drop_class = eval "class #{self.to_s}::LiquidDropClass < Liquid::Drop; self; end"
+    define_method :to_liquid do
+      drop_class.new(self)
+    end
+    drop_class.class_eval do
+      def initialize(object)
+        @object = object
+      end
+      allowed_methods.each do |sym|
+        define_method sym do
+          @object.send sym
+        end
+      end
+    end
+  end
+
+end
--- a/lib/liquid/parse_context.rb
+++ b/lib/liquid/parse_context.rb
@@ -1,42 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class ParseContext
-    attr_accessor :locale, :line_number, :trim_whitespace, :depth
-    attr_reader :partial, :warnings, :error_mode
-
-    def initialize(options = {})
-      @template_options = options ? options.dup : {}
-
-      @locale   = @template_options[:locale] ||= I18n.new
-      @warnings = []
-
-      self.depth   = 0
-      self.partial = false
-    end
-
-    def [](option_key)
-      @options[option_key]
-    end
-
-    def partial=(value)
-      @partial = value
-      @options = value ? partial_options : @template_options
-
-      @error_mode = @options[:error_mode] || Template.error_mode
-    end
-
-    def partial_options
-      @partial_options ||= begin
-        dont_pass = @template_options[:include_options_blacklist]
-        if dont_pass == true
-          { locale: locale }
-        elsif dont_pass.is_a?(Array)
-          @template_options.reject { |k, _v| dont_pass.include?(k) }
-        else
-          @template_options
-        end
-      end
-    end
-  end
-end
--- a/lib/liquid/parse_tree_visitor.rb
+++ b/lib/liquid/parse_tree_visitor.rb
@@ -1,42 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class ParseTreeVisitor
-    def self.for(node, callbacks = Hash.new(proc {}))
-      if defined?(node.class::ParseTreeVisitor)
-        node.class::ParseTreeVisitor
-      else
-        self
-      end.new(node, callbacks)
-    end
-
-    def initialize(node, callbacks)
-      @node      = node
-      @callbacks = callbacks
-    end
-
-    def add_callback_for(*classes, &block)
-      callback = block
-      callback = ->(node, _) { yield node } if block.arity.abs == 1
-      callback = ->(_, _) { yield } if block.arity.zero?
-      classes.each { |klass| @callbacks[klass] = callback }
-      self
-    end
-
-    def visit(context = nil)
-      children.map do |node|
-        item, new_context = @callbacks[node.class].call(node, context)
-        [
-          item,
-          ParseTreeVisitor.for(node, @callbacks).visit(new_context || context),
-        ]
-      end
-    end
-
-    protected
-
-    def children
-      @node.respond_to?(:nodelist) ? Array(@node.nodelist) : []
-    end
-  end
-end
--- a/lib/liquid/parser.rb
+++ b/lib/liquid/parser.rb
@@ -1,95 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class Parser
-    def initialize(input)
-      l       = Lexer.new(input)
-      @tokens = l.tokenize
-      @p      = 0 # pointer to current location
-    end
-
-    def jump(point)
-      @p = point
-    end
-
-    def consume(type = nil)
-      token = @tokens[@p]
-      if type && token[0] != type
-        raise SyntaxError, "Expected #{type} but found #{@tokens[@p].first}"
-      end
-      @p += 1
-      token[1]
-    end
-
-    # Only consumes the token if it matches the type
-    # Returns the token's contents if it was consumed
-    # or false otherwise.
-    def consume?(type)
-      token = @tokens[@p]
-      return false unless token && token[0] == type
-      @p += 1
-      token[1]
-    end
-
-    # Like consume? Except for an :id token of a certain name
-    def id?(str)
-      token = @tokens[@p]
-      return false unless token && token[0] == :id
-      return false unless token[1] == str
-      @p += 1
-      token[1]
-    end
-
-    def look(type, ahead = 0)
-      tok = @tokens[@p + ahead]
-      return false unless tok
-      tok[0] == type
-    end
-
-    SINGLE_TOKEN_EXPRESSION_TYPES = [:string, :number].freeze
-    private_constant :SINGLE_TOKEN_EXPRESSION_TYPES
-
-    def expression
-      token = @tokens[@p]
-      if token[0] == :id
-        variable_signature
-      elsif SINGLE_TOKEN_EXPRESSION_TYPES.include?(token[0])
-        consume
-      elsif token.first == :open_round
-        consume
-        first = expression
-        consume(:dotdot)
-        last = expression
-        consume(:close_round)
-        "(#{first}..#{last})"
-      else
-        raise SyntaxError, "#{token} is not a valid expression"
-      end
-    end
-
-    def argument
-      str = +""
-      # might be a keyword argument (identifier: expression)
-      if look(:id) && look(:colon, 1)
-        str << consume << consume << ' '
-      end
-
-      str << expression
-      str
-    end
-
-    def variable_signature
-      str = consume(:id)
-      while look(:open_square)
-        str << consume
-        str << expression
-        str << consume(:close_square)
-      end
-      if look(:dot)
-        str << consume
-        str << variable_signature
-      end
-      str
-    end
-  end
-end
--- a/lib/liquid/parser_switching.rb
+++ b/lib/liquid/parser_switching.rb
@@ -1,33 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  module ParserSwitching
-    def parse_with_selected_parser(markup)
-      case parse_context.error_mode
-      when :strict then strict_parse_with_error_context(markup)
-      when :lax    then lax_parse(markup)
-      when :warn
-        begin
-          strict_parse_with_error_context(markup)
-        rescue SyntaxError => e
-          parse_context.warnings << e
-          lax_parse(markup)
-        end
-      end
-    end
-
-    private
-
-    def strict_parse_with_error_context(markup)
-      strict_parse(markup)
-    rescue SyntaxError => e
-      e.line_number    = line_number
-      e.markup_context = markup_context(markup)
-      raise e
-    end
-
-    def markup_context(markup)
-      "in \"#{markup.strip}\""
-    end
-  end
-end
--- a/lib/liquid/partial_cache.rb
+++ b/lib/liquid/partial_cache.rb
@@ -1,24 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class PartialCache
-    def self.load(template_name, context:, parse_context:)
-      cached_partials = (context.registers[:cached_partials] ||= {})
-      cached = cached_partials[template_name]
-      return cached if cached
-
-      file_system = (context.registers[:file_system] ||= Liquid::Template.file_system)
-      source      = file_system.read_template_file(template_name)
-
-      parse_context.partial = true
-
-      template_factory = (context.registers[:template_factory] ||= Liquid::TemplateFactory.new)
-      template = template_factory.for(template_name)
-
-      partial = template.parse(source, parse_context)
-      cached_partials[template_name] = partial
-    ensure
-      parse_context.partial = false
-    end
-  end
-end
--- a/lib/liquid/profiler.rb
+++ b/lib/liquid/profiler.rb
@@ -1,171 +0,0 @@
-# frozen_string_literal: true
-
-require 'liquid/profiler/hooks'
-
-module Liquid
-  # Profiler enables support for profiling template rendering to help track down performance issues.
-  #
-  # To enable profiling, first require 'liquid/profiler'.
-  # Then, to profile a parse/render cycle, pass the <tt>profile: true</tt> option to <tt>Liquid::Template.parse</tt>.
-  # After <tt>Liquid::Template#render</tt> is called, the template object makes available an instance of this
-  # class via the <tt>Liquid::Template#profiler</tt> method.
-  #
-  #   template = Liquid::Template.parse(template_content, profile: true)
-  #   output  = template.render
-  #   profile = template.profiler
-  #
-  # This object contains all profiling information, containing information on what tags were rendered,
-  # where in the templates these tags live, and how long each tag took to render.
-  #
-  # This is a tree structure that is Enumerable all the way down, and keeps track of tags and rendering times
-  # inside of <tt>{% include %}</tt> tags.
-  #
-  #   profile.each do |node|
-  #     # Access to the node itself
-  #     node.code
-  #
-  #     # Which template and line number of this node.
-  #     # If top level, this will be "<root>".
-  #     node.partial
-  #     node.line_number
-  #
-  #     # Render time in seconds of this node
-  #     node.render_time
-  #
-  #     # If the template used {% include %}, this node will also have children.
-  #     node.children.each do |child2|
-  #       # ...
-  #     end
-  #   end
-  #
-  # Profiler also exposes the total time of the template's render in <tt>Liquid::Profiler#total_render_time</tt>.
-  #
-  # All render times are in seconds. There is a small performance hit when profiling is enabled.
-  #
-  class Profiler
-    include Enumerable
-
-    class Timing
-      attr_reader :code, :partial, :line_number, :children, :total_time, :self_time
-
-      def initialize(node, partial)
-        @code        = node.respond_to?(:raw) ? node.raw : node
-        @partial     = partial
-        @line_number = node.respond_to?(:line_number) ? node.line_number : nil
-        @children    = []
-      end
-
-      def self.start(node, partial)
-        new(node, partial).tap(&:start)
-      end
-
-      def start
-        @start_time = Time.now
-      end
-
-      def finish
-        @end_time   = Time.now
-        @total_time = @end_time - @start_time
-
-        if @children.empty?
-          @self_time = @total_time
-        else
-          total_children_time = 0
-          @children.each do |child|
-            total_children_time += child.total_time
-          end
-          @self_time = @total_time - total_children_time
-        end
-      end
-
-      def render_time
-        @end_time - @start_time
-      end
-    end
-
-    def self.profile_node_render(node)
-      if Profiler.current_profile && node.respond_to?(:render)
-        Profiler.current_profile.start_node(node)
-        output = yield
-        Profiler.current_profile.end_node(node)
-        output
-      else
-        yield
-      end
-    end
-
-    def self.profile_children(template_name)
-      if Profiler.current_profile
-        Profiler.current_profile.push_partial(template_name)
-        output = yield
-        Profiler.current_profile.pop_partial
-        output
-      else
-        yield
-      end
-    end
-
-    def self.current_profile
-      Thread.current[:liquid_profiler]
-    end
-
-    def initialize(partial_name = "<root>")
-      @partial_stack = [partial_name]
-
-      @root_timing  = Timing.new("", current_partial)
-      @timing_stack = [@root_timing]
-
-      @render_start_at = Time.now
-      @render_end_at   = @render_start_at
-    end
-
-    def start
-      Thread.current[:liquid_profiler] = self
-      @render_start_at = Time.now
-    end
-
-    def stop
-      Thread.current[:liquid_profiler] = nil
-      @render_end_at = Time.now
-    end
-
-    def total_render_time
-      @render_end_at - @render_start_at
-    end
-
-    def each(&block)
-      @root_timing.children.each(&block)
-    end
-
-    def [](idx)
-      @root_timing.children[idx]
-    end
-
-    def length
-      @root_timing.children.length
-    end
-
-    def start_node(node)
-      @timing_stack.push(Timing.start(node, current_partial))
-    end
-
-    def end_node(_node)
-      timing = @timing_stack.pop
-      timing.finish
-
-      @timing_stack.last.children << timing
-    end
-
-    def current_partial
-      @partial_stack.last
-    end
-
-    def push_partial(partial_name)
-      @partial_stack.push(partial_name)
-    end
-
-    def pop_partial
-      @partial_stack.pop
-    end
-  end
-end
--- a/lib/liquid/profiler/hooks.rb
+++ b/lib/liquid/profiler/hooks.rb
@@ -1,25 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class BlockBody
-    def render_node_with_profiling(context, output, node)
-      Profiler.profile_node_render(node) do
-        render_node_without_profiling(context, output, node)
-      end
-    end
-
-    alias_method :render_node_without_profiling, :render_node
-    alias_method :render_node, :render_node_with_profiling
-  end
-
-  class Include < Tag
-    def render_to_output_buffer_with_profiling(context, output)
-      Profiler.profile_children(context.evaluate(@template_name_expr).to_s) do
-        render_to_output_buffer_without_profiling(context, output)
-      end
-    end
-
-    alias_method :render_to_output_buffer_without_profiling, :render_to_output_buffer
-    alias_method :render_to_output_buffer, :render_to_output_buffer_with_profiling
-  end
-end
--- a/lib/liquid/range_lookup.rb
+++ b/lib/liquid/range_lookup.rb
@@ -1,39 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class RangeLookup
-    def self.parse(start_markup, end_markup)
-      start_obj = Expression.parse(start_markup)
-      end_obj   = Expression.parse(end_markup)
-      if start_obj.respond_to?(:evaluate) || end_obj.respond_to?(:evaluate)
-        new(start_obj, end_obj)
-      else
-        start_obj.to_i..end_obj.to_i
-      end
-    end
-
-    def initialize(start_obj, end_obj)
-      @start_obj = start_obj
-      @end_obj   = end_obj
-    end
-
-    def evaluate(context)
-      start_int = to_integer(context.evaluate(@start_obj))
-      end_int   = to_integer(context.evaluate(@end_obj))
-      start_int..end_int
-    end
-
-    private
-
-    def to_integer(input)
-      case input
-      when Integer
-        input
-      when NilClass, String
-        input.to_i
-      else
-        Utils.to_integer(input)
-      end
-    end
-  end
-end
--- a/lib/liquid/register.rb
+++ b/lib/liquid/register.rb
@@ -1,6 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class Register
-  end
-end
--- a/lib/liquid/registers/disabled_tags.rb
+++ b/lib/liquid/registers/disabled_tags.rb
@@ -1,32 +0,0 @@
-# frozen_string_literal: true
-module Liquid
-  class DisabledTags < Register
-    def initialize
-      @disabled_tags = {}
-    end
-
-    def disabled?(tag)
-      @disabled_tags.key?(tag) && @disabled_tags[tag] > 0
-    end
-
-    def disable(tags)
-      tags.each(&method(:increment))
-      yield
-    ensure
-      tags.each(&method(:decrement))
-    end
-
-    private
-
-    def increment(tag)
-      @disabled_tags[tag] ||= 0
-      @disabled_tags[tag]  += 1
-    end
-
-    def decrement(tag)
-      @disabled_tags[tag] -= 1
-    end
-  end
-
-  Template.add_register(:disabled_tags, DisabledTags.new)
-end
--- a/lib/liquid/resource_limits.rb
+++ b/lib/liquid/resource_limits.rb
@@ -1,25 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class ResourceLimits
-    attr_accessor :render_length, :render_score, :assign_score,
-      :render_length_limit, :render_score_limit, :assign_score_limit
-
-    def initialize(limits)
-      @render_length_limit = limits[:render_length_limit]
-      @render_score_limit  = limits[:render_score_limit]
-      @assign_score_limit  = limits[:assign_score_limit]
-      reset
-    end
-
-    def reached?
-      (@render_length_limit && @render_length > @render_length_limit) ||
-        (@render_score_limit && @render_score > @render_score_limit) ||
-        (@assign_score_limit && @assign_score > @assign_score_limit)
-    end
-
-    def reset
-      @render_length = @render_score = @assign_score = 0
-    end
-  end
-end
--- a/lib/liquid/standardfilters.rb
+++ b/lib/liquid/standardfilters.rb
@@ -1,36 +1,21 @@
-# frozen_string_literal: true
-
 require 'cgi'
-require 'bigdecimal'

 module Liquid
+
  module StandardFilters
-    HTML_ESCAPE = {
-      '&' => '&amp;',
-      '>' => '&gt;',
-      '<' => '&lt;',
-      '"' => '&quot;',
-      "'" => '&#39;',
-    }.freeze
-    HTML_ESCAPE_ONCE_REGEXP = /["><']|&(?!([a-zA-Z]+|(#\d+));)/
-    STRIP_HTML_BLOCKS       = Regexp.union(
-      %r{<script.*?</script>}m,
-      /<!--.*?-->/m,
-      %r{<style.*?</style>}m
-    )
-    STRIP_HTML_TAGS = /<.*?>/m

    # Return the size of an array or of an string
    def size(input)
+
      input.respond_to?(:size) ? input.size : 0
    end

-    # convert an input string to DOWNCASE
+    # convert a input string to DOWNCASE
    def downcase(input)
      input.to_s.downcase
    end

-    # convert an input string to UPCASE
+    # convert a input string to UPCASE
    def upcase(input)
      input.to_s.upcase
    end
@@ -41,61 +26,31 @@ module Liquid
    end

    def escape(input)
-      CGI.escapeHTML(input.to_s).untaint unless input.nil?
+      CGI.escapeHTML(input) rescue input
    end
-    alias_method :h, :escape

    def escape_once(input)
-      input.to_s.gsub(HTML_ESCAPE_ONCE_REGEXP, HTML_ESCAPE)
+      ActionView::Helpers::TagHelper.escape_once(input)
+    rescue NameError
+      input
    end

-    def url_encode(input)
-      CGI.escape(input.to_s) unless input.nil?
-    end
-
-    def url_decode(input)
-      return if input.nil?
-
-      result = CGI.unescape(input.to_s)
-      raise Liquid::ArgumentError, "invalid byte sequence in #{result.encoding}" unless result.valid_encoding?
-
-      result
-    end
-
-    def slice(input, offset, length = nil)
-      offset = Utils.to_integer(offset)
-      length = length ? Utils.to_integer(length) : 1
-
-      if input.is_a?(Array)
-        input.slice(offset, length) || []
-      else
-        input.to_s.slice(offset, length) || ''
-      end
-    end
+    alias_method :h, :escape

    # Truncate a string down to x characters
    def truncate(input, length = 50, truncate_string = "...")
-      return if input.nil?
-      input_str = input.to_s
-      length    = Utils.to_integer(length)
-
-      truncate_string_str = truncate_string.to_s
-
-      l = length - truncate_string_str.length
+      if input.nil? then return end
+      l = length.to_i - truncate_string.length
      l = 0 if l < 0
-
-      input_str.length > length ? input_str[0...l].concat(truncate_string_str) : input_str
+      input.length > length.to_i ? input[0...l] + truncate_string : input
    end

    def truncatewords(input, words = 15, truncate_string = "...")
-      return if input.nil?
+      if input.nil? then return end
      wordlist = input.to_s.split
-      words    = Utils.to_integer(words)
-
-      l = words - 1
+      l = words.to_i - 1
      l = 0 if l < 0
-
-      wordlist.length > l ? wordlist[0..l].join(" ").concat(truncate_string.to_s) : input
+      wordlist.length > l ? wordlist[0..l].join(" ") + truncate_string : input
    end

    # Split input string into an array of substrings separated by given pattern.
@@ -104,176 +59,65 @@ module Liquid
    #   <div class="summary">{{ post | split '//' | first }}</div>
    #
    def split(input, pattern)
-      input.to_s.split(pattern.to_s)
-    end
-
-    def strip(input)
-      input.to_s.strip
-    end
-
-    def lstrip(input)
-      input.to_s.lstrip
-    end
-
-    def rstrip(input)
-      input.to_s.rstrip
+      input.split(pattern)
    end

    def strip_html(input)
-      empty  = ''
-      result = input.to_s.gsub(STRIP_HTML_BLOCKS, empty)
-      result.gsub!(STRIP_HTML_TAGS, empty)
-      result
+      input.to_s.gsub(/<script.*?<\/script>/, '').gsub(/<!--.*?-->/, '').gsub(/<.*?>/, '')
    end

    # Remove all newlines from the string
    def strip_newlines(input)
-      input.to_s.gsub(/\r?\n/, '')
+      input.to_s.gsub(/\n/, '')
    end

+
    # Join elements of the array with certain character between them
    def join(input, glue = ' ')
-      InputIterator.new(input, context).join(glue)
+      [input].flatten.join(glue)
    end

    # Sort elements of the array
    # provide optional property with which to sort an array of hashes or drops
    def sort(input, property = nil)
-      ary = InputIterator.new(input, context)
-
-      return [] if ary.empty?
-
+      ary = [input].flatten
      if property.nil?
-        ary.sort do |a, b|
-          nil_safe_compare(a, b)
-        end
-      elsif ary.all? { |el| el.respond_to?(:[]) }
-        begin
-          ary.sort { |a, b| nil_safe_compare(a[property], b[property]) }
-        rescue TypeError
-          raise_property_error(property)
-        end
+        ary.sort
+      elsif ary.first.respond_to?('[]') and !ary.first[property].nil?
+        ary.sort {|a,b| a[property] <=> b[property] }
+      elsif ary.first.respond_to?(property)
+        ary.sort {|a,b| a.send(property) <=> b.send(property) }
      end
    end

-    # Sort elements of an array ignoring case if strings
-    # provide optional property with which to sort an array of hashes or drops
-    def sort_natural(input, property = nil)
-      ary = InputIterator.new(input, context)
-
-      return [] if ary.empty?
-
-      if property.nil?
-        ary.sort do |a, b|
-          nil_safe_casecmp(a, b)
-        end
-      elsif ary.all? { |el| el.respond_to?(:[]) }
-        begin
-          ary.sort { |a, b| nil_safe_casecmp(a[property], b[property]) }
-        rescue TypeError
-          raise_property_error(property)
-        end
-      end
-    end
-
-    # Filter the elements of an array to those with a certain property value.
-    # By default the target is any truthy value.
-    def where(input, property, target_value = nil)
-      ary = InputIterator.new(input, context)
-
-      if ary.empty?
-        []
-      elsif ary.first.respond_to?(:[]) && target_value.nil?
-        begin
-          ary.select { |item| item[property] }
-        rescue TypeError
-          raise_property_error(property)
-        end
-      elsif ary.first.respond_to?(:[])
-        begin
-          ary.select { |item| item[property] == target_value }
-        rescue TypeError
-          raise_property_error(property)
-        end
-      end
-    end
-
-    # Remove duplicate elements from an array
-    # provide optional property with which to determine uniqueness
-    def uniq(input, property = nil)
-      ary = InputIterator.new(input, context)
-
-      if property.nil?
-        ary.uniq
-      elsif ary.empty? # The next two cases assume a non-empty array.
-        []
-      elsif ary.first.respond_to?(:[])
-        begin
-          ary.uniq { |a| a[property] }
-        rescue TypeError
-          raise_property_error(property)
-        end
-      end
-    end
-
-    # Reverse the elements of an array
-    def reverse(input)
-      ary = InputIterator.new(input, context)
-      ary.reverse
-    end
-
    # map/collect on a given property
    def map(input, property)
-      InputIterator.new(input, context).map do |e|
-        e = e.call if e.is_a?(Proc)
-
-        if property == "to_liquid"
-          e
-        elsif e.respond_to?(:[])
-          r = e[property]
-          r.is_a?(Proc) ? r.call : r
-        end
-      end
-    rescue TypeError
-      raise_property_error(property)
-    end
-
-    # Remove nils within an array
-    # provide optional property with which to check for nil
-    def compact(input, property = nil)
-      ary = InputIterator.new(input, context)
-
-      if property.nil?
-        ary.compact
-      elsif ary.empty? # The next two cases assume a non-empty array.
-        []
-      elsif ary.first.respond_to?(:[])
-        begin
-          ary.reject { |a| a[property].nil? }
-        rescue TypeError
-          raise_property_error(property)
-        end
+      ary = [input].flatten
+      if ary.first.respond_to?('[]') and !ary.first[property].nil?
+        ary.map {|e| e[property] }
+      elsif ary.first.respond_to?(property)
+        ary.map {|e| e.send(property) }
      end
    end

    # Replace occurrences of a string with another
    def replace(input, string, replacement = '')
-      input.to_s.gsub(string.to_s, replacement.to_s)
+      input.to_s.gsub(string, replacement)
    end

    # Replace the first occurrences of a string with another
    def replace_first(input, string, replacement = '')
-      input.to_s.sub(string.to_s, replacement.to_s)
+      input.to_s.sub(string, replacement)
    end

    # remove a substring
    def remove(input, string)
-      input.to_s.gsub(string.to_s, '')
+      input.to_s.gsub(string, '')
    end

    # remove the first occurrences of a substring
    def remove_first(input, string)
-      input.to_s.sub(string.to_s, '')
+      input.to_s.sub(string, '')
    end

    # add one string to another
@@ -281,13 +125,6 @@ module Liquid
      input.to_s + string.to_s
    end

-    def concat(input, array)
-      unless array.respond_to?(:to_ary)
-        raise ArgumentError, "concat filter requires an array argument"
-      end
-      InputIterator.new(input, context).concat(array)
-    end
-
    # prepend a string to another
    def prepend(input, string)
      string.to_s + input.to_s
@@ -298,7 +135,7 @@ module Liquid
      input.to_s.gsub(/\n/, "<br />\n")
    end

-    # Reformat a date using Ruby's core Time#strftime( string ) -> string
+    # Reformat a date
    #
    #   %a - The abbreviated weekday name (``Sun'')
    #   %A - The  full  weekday  name (``Sunday'')
@@ -312,7 +149,6 @@ module Liquid
    #   %m - Month of the year (01..12)
    #   %M - Minute of the hour (00..59)
    #   %p - Meridian indicator (``AM''  or  ``PM'')
-    #   %s - Number of seconds since 1970-01-01 00:00:00 UTC.
    #   %S - Second of the minute (00..60)
    #   %U - Week  number  of the current year,
    #           starting with the first Sunday as the first
@@ -327,14 +163,25 @@ module Liquid
    #   %Y - Year with century
    #   %Z - Time zone name
    #   %% - Literal ``%'' character
-    #
-    #   See also: http://www.ruby-doc.org/core/Time.html#method-i-strftime
    def date(input, format)
-      return input if format.to_s.empty?

-      return input unless (date = Utils.to_date(input))
+      if format.to_s.empty?
+        return input.to_s
+      end

-      date.strftime(format.to_s)
+      if ((input.is_a?(String) && !/^\d+$/.match(input.to_s).nil?) || input.is_a?(Integer)) && input.to_i > 0
+        input = Time.at(input.to_i)
+      end
+
+      date = input.is_a?(String) ? Time.parse(input) : input
+
+      if date.respond_to?(:strftime)
+        date.strftime(format.to_s)
+      else
+        input
+      end
+    rescue => e
+      input
    end

    # Get the first element of the passed in array
@@ -355,170 +202,43 @@ module Liquid
      array.last if array.respond_to?(:last)
    end

-    # absolute value
-    def abs(input)
-      result = Utils.to_number(input).abs
-      result.is_a?(BigDecimal) ? result.to_f : result
-    end
-
    # addition
    def plus(input, operand)
-      apply_operation(input, operand, :+)
+      to_number(input) + to_number(operand)
    end

    # subtraction
    def minus(input, operand)
-      apply_operation(input, operand, :-)
+      to_number(input) - to_number(operand)
    end

    # multiplication
    def times(input, operand)
-      apply_operation(input, operand, :*)
+      to_number(input) * to_number(operand)
    end

    # division
    def divided_by(input, operand)
-      apply_operation(input, operand, :/)
-    rescue ::ZeroDivisionError => e
-      raise Liquid::ZeroDivisionError, e.message
+      to_number(input) / to_number(operand)
    end

    def modulo(input, operand)
-      apply_operation(input, operand, :%)
-    rescue ::ZeroDivisionError => e
-      raise Liquid::ZeroDivisionError, e.message
-    end
-
-    def round(input, n = 0)
-      result = Utils.to_number(input).round(Utils.to_number(n))
-      result = result.to_f if result.is_a?(BigDecimal)
-      result = result.to_i if n == 0
-      result
-    rescue ::FloatDomainError => e
-      raise Liquid::FloatDomainError, e.message
-    end
-
-    def ceil(input)
-      Utils.to_number(input).ceil.to_i
-    rescue ::FloatDomainError => e
-      raise Liquid::FloatDomainError, e.message
-    end
-
-    def floor(input)
-      Utils.to_number(input).floor.to_i
-    rescue ::FloatDomainError => e
-      raise Liquid::FloatDomainError, e.message
-    end
-
-    def at_least(input, n)
-      min_value = Utils.to_number(n)
-
-      result = Utils.to_number(input)
-      result = min_value if min_value > result
-      result.is_a?(BigDecimal) ? result.to_f : result
-    end
-
-    def at_most(input, n)
-      max_value = Utils.to_number(n)
-
-      result = Utils.to_number(input)
-      result = max_value if max_value < result
-      result.is_a?(BigDecimal) ? result.to_f : result
-    end
-
-    # Set a default value when the input is nil, false or empty
-    #
-    # Example:
-    #    {{ product.title | default: "No Title" }}
-    #
-    # Use `allow_false` when an input should only be tested against nil or empty and not false.
-    #
-    # Example:
-    #    {{ product.title | default: "No Title", allow_false: true }}
-    #
-    def default(input, default_value = '', options = {})
-      options = {} unless options.is_a?(Hash)
-      false_check = options['allow_false'] ? input.nil? : !input
-      false_check || (input.respond_to?(:empty?) && input.empty?) ? default_value : input
+      to_number(input) % to_number(operand)
    end

    private

-    attr_reader :context
-
-    def raise_property_error(property)
-      raise Liquid::ArgumentError, "cannot select the property '#{property}'"
-    end
-
-    def apply_operation(input, operand, operation)
-      result = Utils.to_number(input).send(operation, Utils.to_number(operand))
-      result.is_a?(BigDecimal) ? result.to_f : result
-    end
-
-    def nil_safe_compare(a, b)
-      if !a.nil? && !b.nil?
-        a <=> b
-      else
-        a.nil? ? 1 : -1
-      end
-    end
-
-    def nil_safe_casecmp(a, b)
-      if !a.nil? && !b.nil?
-        a.to_s.casecmp(b.to_s)
-      else
-        a.nil? ? 1 : -1
-      end
-    end
-
-    class InputIterator
-      include Enumerable
-
-      def initialize(input, context)
-        @context = context
-        @input   = if input.is_a?(Array)
-          input.flatten
-        elsif input.is_a?(Hash)
-          [input]
-        elsif input.is_a?(Enumerable)
-          input
+      def to_number(obj)
+        case obj
+        when Numeric
+          obj
+        when String
+          (obj.strip =~ /^\d+\.\d+$/) ? obj.to_f : obj.to_i
        else
-          Array(input)
+          0
        end
      end

-      def join(glue)
-        to_a.join(glue.to_s)
-      end
-
-      def concat(args)
-        to_a.concat(args)
-      end
-
-      def reverse
-        reverse_each.to_a
-      end
-
-      def uniq(&block)
-        to_a.uniq(&block)
-      end
-
-      def compact
-        to_a.compact
-      end
-
-      def empty?
-        @input.each { return false }
-        true
-      end
-
-      def each
-        @input.each do |e|
-          e.context = @context if e.respond_to?(:context=)
-          yield(e.respond_to?(:to_liquid) ? e.to_liquid : e)
-        end
-      end
-    end
  end

  Template.register_filter(StandardFilters)
--- a/lib/liquid/static_registers.rb
+++ b/lib/liquid/static_registers.rb
@@ -1,44 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class StaticRegisters
-    attr_reader :static
-
-    def initialize(registers = {})
-      @static    = registers.is_a?(StaticRegisters) ? registers.static : registers
-      @registers = {}
-    end
-
-    def []=(key, value)
-      @registers[key] = value
-    end
-
-    def [](key)
-      if @registers.key?(key)
-        @registers[key]
-      else
-        @static[key]
-      end
-    end
-
-    def delete(key)
-      @registers.delete(key)
-    end
-
-    UNDEFINED = Object.new
-
-    def fetch(key, default = UNDEFINED, &block)
-      if @registers.key?(key)
-        @registers.fetch(key)
-      elsif default != UNDEFINED
-        @static.fetch(key, default, &block)
-      else
-        @static.fetch(key, &block)
-      end
-    end
-
-    def key?(key)
-      @registers.key?(key) || @static.key?(key)
-    end
-  end
-end
--- a/lib/liquid/strainer.rb
+++ b/lib/liquid/strainer.rb
@@ -0,0 +1,53 @@
+require 'set'
+
+module Liquid
+
+  # Strainer is the parent class for the filters system.
+  # New filters are mixed into the strainer class which is then instantiated for each liquid template render run.
+  #
+  # The Strainer only allows method calls defined in filters given to it via Strainer.global_filter,
+  # Context#add_filters or Template.register_filter
+  class Strainer #:nodoc:
+    @@filters = {}
+    @@known_filters = Set.new
+    @@known_methods = Set.new
+
+    def initialize(context)
+      @context = context
+    end
+
+    def self.global_filter(filter)
+      raise ArgumentError, "Passed filter is not a module" unless filter.is_a?(Module)
+      add_known_filter(filter)
+      @@filters[filter.name] = filter
+    end
+
+    def self.add_known_filter(filter)
+      unless @@known_filters.include?(filter)
+        @@method_blacklist ||= Set.new(Strainer.instance_methods.map(&:to_s))
+        new_methods = filter.instance_methods.map(&:to_s)
+        new_methods.reject!{ |m| @@method_blacklist.include?(m) }
+        @@known_methods.merge(new_methods)
+        @@known_filters.add(filter)
+      end
+    end
+
+    def self.create(context)
+      strainer = Strainer.new(context)
+      @@filters.each { |k,m| strainer.extend(m) }
+      strainer
+    end
+
+    def invoke(method, *args)
+      if invokable?(method)
+        send(method, *args)
+      else
+        args.first
+      end
+    end
+
+    def invokable?(method)
+      @@known_methods.include?(method.to_s) && respond_to?(method)
+    end
+  end
+end
--- a/lib/liquid/strainer_factory.rb
+++ b/lib/liquid/strainer_factory.rb
@@ -1,36 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  # StrainerFactory is the factory for the filters system.
-  module StrainerFactory
-    extend self
-
-    def add_global_filter(filter)
-      strainer_class_cache.clear
-      global_filters << filter
-    end
-
-    def create(context, filters = [])
-      strainer_from_cache(filters).new(context)
-    end
-
-    private
-
-    def global_filters
-      @global_filters ||= []
-    end
-
-    def strainer_from_cache(filters)
-      strainer_class_cache[filters] ||= begin
-        klass = Class.new(StrainerTemplate)
-        global_filters.each { |f| klass.add_filter(f) }
-        filters.each { |f| klass.add_filter(f) }
-        klass
-      end
-    end
-
-    def strainer_class_cache
-      @strainer_class_cache ||= {}
-    end
-  end
-end
--- a/lib/liquid/strainer_template.rb
+++ b/lib/liquid/strainer_template.rb
@@ -1,53 +0,0 @@
-# frozen_string_literal: true
-
-require 'set'
-
-module Liquid
-  # StrainerTemplate is the computed class for the filters system.
-  # New filters are mixed into the strainer class which is then instantiated for each liquid template render run.
-  #
-  # The Strainer only allows method calls defined in filters given to it via StrainerFactory.add_global_filter,
-  # Context#add_filters or Template.register_filter
-  class StrainerTemplate
-    def initialize(context)
-      @context = context
-    end
-
-    class << self
-      def add_filter(filter)
-        return if include?(filter)
-
-        invokable_non_public_methods = (filter.private_instance_methods + filter.protected_instance_methods).select { |m| invokable?(m) }
-        if invokable_non_public_methods.any?
-          raise MethodOverrideError, "Filter overrides registered public methods as non public: #{invokable_non_public_methods.join(', ')}"
-        end
-
-        include(filter)
-
-        filter_methods.merge(filter.public_instance_methods.map(&:to_s))
-      end
-
-      def invokable?(method)
-        filter_methods.include?(method.to_s)
-      end
-
-      private
-
-      def filter_methods
-        @filter_methods ||= Set.new
-      end
-    end
-
-    def invoke(method, *args)
-      if self.class.invokable?(method)
-        send(method, *args)
-      elsif @context.strict_filters
-        raise Liquid::UndefinedFilter, "undefined filter #{method}"
-      else
-        args.first
-      end
-    rescue ::ArgumentError => e
-      raise Liquid::ArgumentError, e.message, e.backtrace
-    end
-  end
-end
--- a/lib/liquid/tablerowloop_drop.rb
+++ b/lib/liquid/tablerowloop_drop.rb
@@ -1,64 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class TablerowloopDrop < Drop
-    def initialize(length, cols)
-      @length = length
-      @row    = 1
-      @col    = 1
-      @cols   = cols
-      @index  = 0
-    end
-
-    attr_reader :length, :col, :row
-
-    def index
-      @index + 1
-    end
-
-    def index0
-      @index
-    end
-
-    def col0
-      @col - 1
-    end
-
-    def rindex
-      @length - @index
-    end
-
-    def rindex0
-      @length - @index - 1
-    end
-
-    def first
-      @index == 0
-    end
-
-    def last
-      @index == @length - 1
-    end
-
-    def col_first
-      @col == 1
-    end
-
-    def col_last
-      @col == @cols
-    end
-
-    protected
-
-    def increment!
-      @index += 1
-
-      if @col == @cols
-        @col = 1
-        @row += 1
-      else
-        @col += 1
-      end
-    end
-  end
-end
--- a/lib/liquid/tag.rb
+++ b/lib/liquid/tag.rb
@@ -1,73 +1,26 @@
-# frozen_string_literal: true
-
 module Liquid
+
  class Tag
-    attr_reader :nodelist, :tag_name, :line_number, :parse_context
-    alias_method :options, :parse_context
-    include ParserSwitching

-    class << self
-      def parse(tag_name, markup, tokenizer, parse_context)
-        tag = new(tag_name, markup, parse_context)
-        tag.parse(tokenizer)
-        tag
-      end
+    attr_accessor :nodelist

-      def disable_tags(*tags)
-        disabled_tags.push(*tags)
-      end
-
-      private :new
-
-      def disabled_tags
-        @disabled_tags ||= []
-      end
+    def initialize(tag_name, markup, tokens)
+      @tag_name   = tag_name
+      @markup     = markup
+      parse(tokens)
    end

-    def initialize(tag_name, markup, parse_context)
-      @tag_name      = tag_name
-      @markup        = markup
-      @parse_context = parse_context
-      @line_number   = parse_context.line_number
-    end
-
-    def parse(_tokens)
-    end
-
-    def raw
-      "#{@tag_name} #{@markup}"
+    def parse(tokens)
    end

    def name
      self.class.name.downcase
    end

-    def render(_context)
+    def render(context)
      ''
    end

-    def disabled?(context)
-      context.registers[:disabled_tags].disabled?(tag_name)
-    end
+  end # Tag

-    def disabled_error_message
-      "#{tag_name} #{options[:locale].t('errors.disabled.tag')}"
-    end
-
-    # For backwards compatibility with custom tags. In a future release, the semantics
-    # of the `render_to_output_buffer` method will become the default and the `render`
-    # method will be removed.
-    def render_to_output_buffer(context, output)
-      output << render(context)
-      output
-    end
-
-    def blank?
-      false
-    end
-
-    def disabled_tags
-      self.class.disabled_tags
-    end
-  end
-end
+end # Tag
--- a/lib/liquid/tags/assign.rb
+++ b/lib/liquid/tags/assign.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 module Liquid
+
  # Assign sets a variable in your template.
  #
  #   {% assign foo = 'monkey' %}
@@ -10,52 +9,25 @@ module Liquid
  #  {{ foo }}
  #
  class Assign < Tag
-    Syntax = /(#{VariableSignature}+)\s*=\s*(.*)\s*/om
-
-    attr_reader :to, :from
-
-    def initialize(tag_name, markup, options)
-      super
+    Syntax = /(#{VariableSignature}+)\s*=\s*(.*)\s*/o
+  
+    def initialize(tag_name, markup, tokens)          
      if markup =~ Syntax
-        @to   = Regexp.last_match(1)
-        @from = Variable.new(Regexp.last_match(2), options)
+        @to = $1
+        @from = Variable.new($2)
      else
-        raise SyntaxError, options[:locale].t('errors.syntax.assign')
+        raise SyntaxError.new("Syntax Error in 'assign' - Valid syntax: assign [var] = [source]")
      end
+      
+      super      
    end
-
-    def render_to_output_buffer(context, output)
-      val = @from.render(context)
-      context.scopes.last[@to] = val
-      context.resource_limits.assign_score += assign_score_of(val)
-      output
-    end
-
-    def blank?
-      true
-    end
-
-    private
-
-    def assign_score_of(val)
-      if val.instance_of?(String)
-        val.bytesize
-      elsif val.instance_of?(Array) || val.instance_of?(Hash)
-        sum = 1
-        # Uses #each to avoid extra allocations.
-        val.each { |child| sum += assign_score_of(child) }
-        sum
-      else
-        1
-      end
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [@node.from]
-      end
-    end
-  end
-
-  Template.register_tag('assign', Assign)
+  
+    def render(context)
+       context.scopes.last[@to] = @from.render(context)
+       ''
+    end 
+  
+  end  
+  
+  Template.register_tag('assign', Assign)  
 end
--- a/lib/liquid/tags/break.rb
+++ b/lib/liquid/tags/break.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 module Liquid
+
  # Break tag to be used to break out of a for loop.
  #
  # == Basic Usage:
@@ -9,11 +8,13 @@ module Liquid
  #        {% break %}
  #      {% endif %}
  #    {% endfor %}
-  #
-  class Break < Tag
+  # 
+  class Break < Tag 
+
    def interrupt
      BreakInterrupt.new
    end
+
  end

  Template.register_tag('break', Break)
--- a/lib/liquid/tags/capture.rb
+++ b/lib/liquid/tags/capture.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 module Liquid
+
  # Capture stores the result of a block into a variable without rendering it inplace.
  #
  #   {% capture heading %}
@@ -13,27 +12,22 @@ module Liquid
  # in a sidebar or footer.
  #
  class Capture < Block
-    Syntax = /(#{VariableSignature}+)/o
+    Syntax = /(#{WordRegex}+)/o

-    def initialize(tag_name, markup, options)
-      super
+    def initialize(tag_name, markup, tokens)
      if markup =~ Syntax
-        @to = Regexp.last_match(1)
+        @to = $1
      else
-        raise SyntaxError, options[:locale].t("errors.syntax.capture")
+        raise SyntaxError.new("Syntax Error in 'capture' - Valid syntax: capture [var]")
      end
-    end

-    def render_to_output_buffer(context, output)
-      previous_output_size = output.bytesize
      super
-      context.scopes.last[@to] = output
-      context.resource_limits.assign_score += (output.bytesize - previous_output_size)
-      output
    end

-    def blank?
-      true
+    def render(context)
+      output = super
+      context.scopes.last[@to] = output
+      ''
    end
  end

--- a/lib/liquid/tags/case.rb
+++ b/lib/liquid/tags/case.rb
@@ -1,33 +1,22 @@
-# frozen_string_literal: true
-
 module Liquid
  class Case < Block
    Syntax     = /(#{QuotedFragment})/o
-    WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/om
+    WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/o

-    attr_reader :blocks, :left
-
-    def initialize(tag_name, markup, options)
-      super
+    def initialize(tag_name, markup, tokens)      
      @blocks = []
-
+      
      if markup =~ Syntax
-        @left = Expression.parse(Regexp.last_match(1))
+        @left = $1
      else
-        raise SyntaxError, options[:locale].t("errors.syntax.case")
+        raise SyntaxError.new("Syntax Error in tag 'case' - Valid syntax: case [condition]")
      end
-    end
-
-    def parse(tokens)
-      body = BlockBody.new
-      body = @blocks.last.attachment while parse_body(body, tokens)
-    end
-
-    def nodelist
-      @blocks.map(&:attachment)
+            
+      super
    end

    def unknown_tag(tag, markup, tokens)
+      @nodelist = []
      case tag
      when 'when'
        record_when_condition(markup)
@@ -38,55 +27,53 @@ module Liquid
      end
    end

-    def render_to_output_buffer(context, output)
-      execute_else_block = true
-
-      @blocks.each do |block|
-        if block.else?
-          block.attachment.render_to_output_buffer(context, output) if execute_else_block
-        elsif block.evaluate(context)
-          execute_else_block = false
-          block.attachment.render_to_output_buffer(context, output)
+    def render(context)      
+      context.stack do          
+        execute_else_block = true
+        
+        output = ''
+        @blocks.each do |block|
+          if block.else? 
+            return render_all(block.attachment, context) if execute_else_block
+          elsif block.evaluate(context)
+            execute_else_block = false        
+            output << render_all(block.attachment, context)
+          end            
        end
-      end
-
-      output
+        output
+      end          
    end
-
+    
    private
-
-    def record_when_condition(markup)
-      body = BlockBody.new
-
+    
+    def record_when_condition(markup)                
      while markup
-        unless markup =~ WhenSyntax
-          raise SyntaxError, options[:locale].t("errors.syntax.case_invalid_when")
-        end
+      	# Create a new nodelist and assign it to the new block
+      	if not markup =~ WhenSyntax
+      	  raise SyntaxError.new("Syntax Error in tag 'case' - Valid when condition: {% when [condition] [or condition2...] %} ")
+      	end

-        markup = Regexp.last_match(2)
+      	markup = $2

-        block = Condition.new(@left, '==', Expression.parse(Regexp.last_match(1)))
-        block.attach(body)
-        @blocks << block
+      	block = Condition.new(@left, '==', $1)        
+      	block.attach(@nodelist)
+      	@blocks.push(block)
      end
    end

-    def record_else_condition(markup)
-      unless markup.strip.empty?
-        raise SyntaxError, options[:locale].t("errors.syntax.case_invalid_else")
-      end
+    def record_else_condition(markup)            

-      block = ElseCondition.new
-      block.attach(BlockBody.new)
+      if not markup.strip.empty?
+        raise SyntaxError.new("Syntax Error in tag 'case' - Valid else condition: {% else %} (no parameters) ")
+      end
+         
+      block = ElseCondition.new            
+      block.attach(@nodelist)
      @blocks << block
    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [@node.left] + @node.blocks
-      end
-    end
-  end
-
+    
+        
+  end    
+  
  Template.register_tag('case', Case)
 end
--- a/lib/liquid/tags/comment.rb
+++ b/lib/liquid/tags/comment.rb
@@ -1,16 +1,7 @@
-# frozen_string_literal: true
-
 module Liquid
  class Comment < Block
-    def render_to_output_buffer(_context, output)
-      output
-    end
-
-    def unknown_tag(_tag, _markup, _tokens)
-    end
-
-    def blank?
-      true
+    def render(context)
+      ''
    end
  end

--- a/lib/liquid/tags/continue.rb
+++ b/lib/liquid/tags/continue.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 module Liquid
+
  # Continue tag to be used to break out of a for loop.
  #
  # == Basic Usage:
@@ -9,11 +8,13 @@ module Liquid
  #        {% continue %}
  #      {% endif %}
  #    {% endfor %}
-  #
+  # 
  class Continue < Tag
+
    def interrupt
      ContinueInterrupt.new
    end
+
  end

  Template.register_tag('continue', Continue)
--- a/lib/liquid/tags/cycle.rb
+++ b/lib/liquid/tags/cycle.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 module Liquid
+  
  # Cycle is usually used within a loop to alternate between values, like colors or DOM classes.
  #
  #   {% for item in items %}
@@ -14,63 +13,47 @@ module Liquid
  #    <div class="green"> Item five</div>
  #
  class Cycle < Tag
-    SimpleSyntax = /\A#{QuotedFragment}+/o
-    NamedSyntax  = /\A(#{QuotedFragment})\s*\:\s*(.*)/om
-
-    attr_reader :variables
-
-    def initialize(tag_name, markup, options)
-      super
+    SimpleSyntax = /^#{QuotedFragment}+/o
+    NamedSyntax  = /^(#{QuotedFragment})\s*\:\s*(.*)/o
+  
+    def initialize(tag_name, markup, tokens)      
      case markup
      when NamedSyntax
-        @variables = variables_from_string(Regexp.last_match(2))
-        @name      = Expression.parse(Regexp.last_match(1))
+      	@variables = variables_from_string($2)
+      	@name = $1
      when SimpleSyntax
        @variables = variables_from_string(markup)
-        @name      = @variables.to_s
+      	@name = "'#{@variables.to_s}'"
      else
-        raise SyntaxError, options[:locale].t("errors.syntax.cycle")
+        raise SyntaxError.new("Syntax Error in 'cycle' - Valid syntax: cycle [name :] var [, var2, var3 ...]")
+      end
+      super    
+    end    
+  
+    def render(context)
+      context.registers[:cycle] ||= Hash.new(0)
+    
+      context.stack do
+        key = context[@name]	
+        iteration = context.registers[:cycle][key]
+        result = context[@variables[iteration]]
+        iteration += 1    
+        iteration  = 0  if iteration >= @variables.size 
+        context.registers[:cycle][key] = iteration
+        result 
      end
    end
-
-    def render_to_output_buffer(context, output)
-      context.registers[:cycle] ||= {}
-
-      key       = context.evaluate(@name)
-      iteration = context.registers[:cycle][key].to_i
-
-      val = context.evaluate(@variables[iteration])
-
-      if val.is_a?(Array)
-        val = val.join
-      elsif !val.is_a?(String)
-        val = val.to_s
-      end
-
-      output << val
-
-      iteration += 1
-      iteration = 0 if iteration >= @variables.size
-
-      context.registers[:cycle][key] = iteration
-      output
-    end
-
+  
    private
-
+  
    def variables_from_string(markup)
      markup.split(',').collect do |var|
-        var =~ /\s*(#{QuotedFragment})\s*/o
-        Regexp.last_match(1) ? Expression.parse(Regexp.last_match(1)) : nil
-      end.compact
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        Array(@node.variables)
-      end
+    	  var =~ /\s*(#{QuotedFragment})\s*/o
+    	  $1 ? $1 : nil
+    	end.compact
    end
+  
  end
-
+  
  Template.register_tag('cycle', Cycle)
 end
--- a/lib/liquid/tags/decrement.rb
+++ b/lib/liquid/tags/decrement.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 module Liquid
+  
  # decrement is used in a place where one needs to insert a counter
  #     into a template, and needs the counter to survive across
  #     multiple instantiations of the template.
@@ -20,19 +19,21 @@ module Liquid
  #    Hello: -3
  #
  class Decrement < Tag
-    def initialize(tag_name, markup, options)
-      super
+    def initialize(tag_name, markup, tokens)      
      @variable = markup.strip
-    end

-    def render_to_output_buffer(context, output)
+      super    
+    end    
+  
+    def render(context)
      value = context.environments.first[@variable] ||= 0
-      value -= 1
+      value = value - 1
      context.environments.first[@variable] = value
-      output << value.to_s
-      output
+      value.to_s
    end
+  
+    private
  end
-
+  
  Template.register_tag('decrement', Decrement)
 end
--- a/lib/liquid/tags/echo.rb
+++ b/lib/liquid/tags/echo.rb
@@ -1,26 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  # Echo outputs an expression
-  #
-  #   {% echo monkey %}
-  #   {% echo user.name %}
-  #
-  # This is identical to variable output syntax, like {{ foo }}, but works
-  # inside {% liquid %} tags. The full syntax is supported, including filters:
-  #
-  #   {% echo user | link %}
-  #
-  class Echo < Tag
-    def initialize(tag_name, markup, parse_context)
-      super
-      @variable = Variable.new(markup, parse_context)
-    end
-
-    def render(context)
-      @variable.render_to_output_buffer(context, +'')
-    end
-  end
-
-  Template.register_tag('echo', Echo)
-end
--- a/lib/liquid/tags/for.rb
+++ b/lib/liquid/tags/for.rb
@@ -1,7 +1,6 @@
-# frozen_string_literal: true
-
 module Liquid
-  # "For" iterates over an array or collection.
+
+  # "For" iterates over an array or collection. 
  # Several useful variables are available to you within the loop.
  #
  # == Basic usage:
@@ -23,16 +22,16 @@ module Liquid
  #
  #    {% for item in collection limit:5 offset:10 %}
  #      {{ item.name }}
-  #    {% end %}
+  #    {% end %}             
  #
-  #  To reverse the for loop simply use {% for item in collection reversed %} (note that the flag's spelling is different to the filter `reverse`)
+  #  To reverse the for loop simply use {% for item in collection reversed %}
  #
  # == Available variables:
  #
  # forloop.name:: 'item-collection'
  # forloop.length:: Length of the loop
  # forloop.index:: The current item's position in the collection;
-  #                 forloop.index starts at 1.
+  #                 forloop.index starts at 1. 
  #                 This is helpful for non-programmers who start believe
  #                 the first item in an array is 1, not 0.
  # forloop.index0:: The current item's position in the collection
@@ -43,176 +42,100 @@ module Liquid
  #                   where 0 is the last item.
  # forloop.first:: Returns true if the item is the first item.
  # forloop.last:: Returns true if the item is the last item.
-  # forloop.parentloop:: Provides access to the parent loop, if present.
  #
-  class For < Block
-    Syntax = /\A(#{VariableSegment}+)\s+in\s+(#{QuotedFragment}+)\s*(reversed)?/o
+  class For < Block                                             
+    Syntax = /(#{WordRegex}+)\s+in\s+(#{QuotedFragment}+)\s*(reversed)?/ou
+  
+    def initialize(tag_name, markup, tokens)
+      if markup =~ Syntax
+        @variable_name = $1
+        @collection_name = $2
+        @name = "#{$1}-#{$2}"           
+        @reversed = $3             
+        @attributes = {}
+        markup.scan(TagAttributes) do |key, value|
+          @attributes[key] = value
+        end        
+      else
+        raise SyntaxError.new("Syntax Error in 'for loop' - Valid syntax: for [item] in [collection]")
+      end

-    attr_reader :collection_name, :variable_name, :limit, :from
-
-    def initialize(tag_name, markup, options)
+      @nodelist = @for_block = []
      super
-      @from = @limit = nil
-      parse_with_selected_parser(markup)
-      @for_block = BlockBody.new
-      @else_block = nil
-    end
-
-    def parse(tokens)
-      return unless parse_body(@for_block, tokens)
-      parse_body(@else_block, tokens)
-    end
-
-    def nodelist
-      @else_block ? [@for_block, @else_block] : [@for_block]
    end

    def unknown_tag(tag, markup, tokens)
      return super unless tag == 'else'
-      @else_block = BlockBody.new
+      @nodelist = @else_block = []
    end
-
-    def render_to_output_buffer(context, output)
-      segment = collection_segment(context)
-
-      if segment.empty?
-        render_else(context, output)
+  
+    def render(context)       
+      context.registers[:for] ||= Hash.new(0)
+    
+      collection = context[@collection_name]
+      collection = collection.to_a if collection.is_a?(Range)
+    
+      # Maintains Ruby 1.8.7 String#each behaviour on 1.9
+      return render_else(context) unless iterable?(collection)
+                                                 
+      from = if @attributes['offset'] == 'continue'
+        context.registers[:for][@name].to_i
      else
-        render_segment(context, output, segment)
+        context[@attributes['offset']].to_i
      end
+        
+      limit = context[@attributes['limit']]
+      to    = limit ? limit.to_i + from : nil  

-      output
-    end

-    protected
+      segment = Utils.slice_collection_using_each(collection, from, to)

-    def lax_parse(markup)
-      if markup =~ Syntax
-        @variable_name   = Regexp.last_match(1)
-        collection_name  = Regexp.last_match(2)
-        @reversed        = !!Regexp.last_match(3)
-        @name            = "#{@variable_name}-#{collection_name}"
-        @collection_name = Expression.parse(collection_name)
-        markup.scan(TagAttributes) do |key, value|
-          set_attribute(key, value)
+      return render_else(context) if segment.empty?
+      
+      segment.reverse! if @reversed
+
+      result = ''
+        
+      length = segment.length            
+            
+      # Store our progress through the collection for the continue flag
+      context.registers[:for][@name] = from + segment.length
+              
+      context.stack do
+        segment.each_with_index do |item, index|
+          context[@variable_name] = item
+          context['forloop'] = {
+            'name'    => @name,
+            'length'  => length,
+            'index'   => index + 1, 
+            'index0'  => index, 
+            'rindex'  => length - index,
+            'rindex0' => length - index - 1,
+            'first'   => (index == 0),
+            'last'    => (index == length - 1) }
+
+          result << render_all(@for_block, context)
+
+          # Handle any interrupts if they exist.
+          if context.has_interrupt?
+            interrupt = context.pop_interrupt
+            break if interrupt.is_a? BreakInterrupt
+            next if interrupt.is_a? ContinueInterrupt
+          end
        end
-      else
-        raise SyntaxError, options[:locale].t("errors.syntax.for")
      end
-    end
-
-    def strict_parse(markup)
-      p = Parser.new(markup)
-      @variable_name = p.consume(:id)
-      raise SyntaxError, options[:locale].t("errors.syntax.for_invalid_in") unless p.id?('in')
-
-      collection_name  = p.expression
-      @collection_name = Expression.parse(collection_name)
-
-      @name     = "#{@variable_name}-#{collection_name}"
-      @reversed = p.id?('reversed')
-
-      while p.look(:id) && p.look(:colon, 1)
-        unless (attribute = p.id?('limit') || p.id?('offset'))
-          raise SyntaxError, options[:locale].t("errors.syntax.for_invalid_attribute")
-        end
-        p.consume
-        set_attribute(attribute, p.expression)
-      end
-      p.consume(:end_of_string)
-    end
+      result     
+    end          

    private

-    def collection_segment(context)
-      offsets = context.registers[:for] ||= {}
-
-      from = if @from == :continue
-        offsets[@name].to_i
-      else
-        from_value = context.evaluate(@from)
-        if from_value.nil?
-          0
-        else
-          Utils.to_integer(from_value)
-        end
+      def render_else(context)
+        return @else_block ? [render_all(@else_block, context)] : ''
      end

-      collection = context.evaluate(@collection_name)
-      collection = collection.to_a if collection.is_a?(Range)
-
-      limit_value = context.evaluate(@limit)
-      to = if limit_value.nil?
-        nil
-      else
-        Utils.to_integer(limit_value) + from
+      def iterable?(collection)
+        collection.respond_to?(:each) || Utils.non_blank_string?(collection)
      end
-
-      segment = Utils.slice_collection(collection, from, to)
-      segment.reverse! if @reversed
-
-      offsets[@name] = from + segment.length
-
-      segment
-    end
-
-    def render_segment(context, output, segment)
-      for_stack = context.registers[:for_stack] ||= []
-      length    = segment.length
-
-      context.stack do
-        loop_vars = Liquid::ForloopDrop.new(@name, length, for_stack[-1])
-
-        for_stack.push(loop_vars)
-
-        begin
-          context['forloop'] = loop_vars
-
-          segment.each do |item|
-            context[@variable_name] = item
-            @for_block.render_to_output_buffer(context, output)
-            loop_vars.send(:increment!)
-
-            # Handle any interrupts if they exist.
-            next unless context.interrupt?
-            interrupt = context.pop_interrupt
-            break if interrupt.is_a?(BreakInterrupt)
-            next if interrupt.is_a?(ContinueInterrupt)
-          end
-        ensure
-          for_stack.pop
-        end
-      end
-
-      output
-    end
-
-    def set_attribute(key, expr)
-      case key
-      when 'offset'
-        @from = if expr == 'continue'
-          :continue
-        else
-          Expression.parse(expr)
-        end
-      when 'limit'
-        @limit = Expression.parse(expr)
-      end
-    end
-
-    def render_else(context, output)
-      if @else_block
-        @else_block.render_to_output_buffer(context, output)
-      else
-        output
-      end
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        (super + [@node.limit, @node.from, @node.collection_name]).compact
-      end
-    end
  end

  Template.register_tag('for', For)
--- a/lib/liquid/tags/if.rb
+++ b/lib/liquid/tags/if.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 module Liquid
+
  # If is the conditional block
  #
  #   {% if user.admin %}
@@ -11,26 +10,18 @@ module Liquid
  #
  #    There are {% if count < 5 %} less {% else %} more {% endif %} items than you need.
  #
+  #
  class If < Block
-    Syntax                  = /(#{QuotedFragment})\s*([=!<>a-z_]+)?\s*(#{QuotedFragment})?/o
+    SyntaxHelp = "Syntax Error in tag 'if' - Valid syntax: if [expression]"
+    Syntax = /(#{QuotedFragment})\s*([=!<>a-z_]+)?\s*(#{QuotedFragment})?/o
    ExpressionsAndOperators = /(?:\b(?:\s?and\s?|\s?or\s?)\b|(?:\s*(?!\b(?:\s?and\s?|\s?or\s?)\b)(?:#{QuotedFragment}|\S+)\s*)+)/o
-    BOOLEAN_OPERATORS       = %w(and or).freeze

-    attr_reader :blocks
-
-    def initialize(tag_name, markup, options)
-      super
+    def initialize(tag_name, markup, tokens)
      @blocks = []
+
      push_block('if', markup)
-    end

-    def nodelist
-      @blocks.map(&:attachment)
-    end
-
-    def parse(tokens)
-      while parse_body(@blocks.last.attachment, tokens)
-      end
+      super
    end

    def unknown_tag(tag, markup, tokens)
@@ -41,82 +32,47 @@ module Liquid
      end
    end

-    def render_to_output_buffer(context, output)
-      @blocks.each do |block|
-        if block.evaluate(context)
-          return block.attachment.render_to_output_buffer(context, output)
+    def render(context)
+      context.stack do
+        @blocks.each do |block|
+          if block.evaluate(context)
+            return render_all(block.attachment, context)
+          end
        end
+        ''
      end
-
-      output
    end

    private

-    def push_block(tag, markup)
-      block = if tag == 'else'
-        ElseCondition.new
-      else
-        parse_with_selected_parser(markup)
+      def push_block(tag, markup)
+        block = if tag == 'else'
+          ElseCondition.new
+        else
+
+          expressions = markup.scan(ExpressionsAndOperators).reverse
+          raise(SyntaxError, SyntaxHelp) unless expressions.shift =~ Syntax
+
+          condition = Condition.new($1, $2, $3)
+
+          while not expressions.empty?
+            operator = (expressions.shift).to_s.strip
+
+            raise(SyntaxError, SyntaxHelp) unless expressions.shift.to_s =~ Syntax
+
+            new_condition = Condition.new($1, $2, $3)
+            new_condition.send(operator.to_sym, condition)
+            condition = new_condition
+          end
+
+          condition
+        end
+
+        @blocks.push(block)
+        @nodelist = block.attach(Array.new)
      end

-      @blocks.push(block)
-      block.attach(BlockBody.new)
-    end

-    def lax_parse(markup)
-      expressions = markup.scan(ExpressionsAndOperators)
-      raise SyntaxError, options[:locale].t("errors.syntax.if") unless expressions.pop =~ Syntax
-
-      condition = Condition.new(Expression.parse(Regexp.last_match(1)), Regexp.last_match(2), Expression.parse(Regexp.last_match(3)))
-
-      until expressions.empty?
-        operator = expressions.pop.to_s.strip
-
-        raise SyntaxError, options[:locale].t("errors.syntax.if") unless expressions.pop.to_s =~ Syntax
-
-        new_condition = Condition.new(Expression.parse(Regexp.last_match(1)), Regexp.last_match(2), Expression.parse(Regexp.last_match(3)))
-        raise SyntaxError, options[:locale].t("errors.syntax.if") unless BOOLEAN_OPERATORS.include?(operator)
-        new_condition.send(operator, condition)
-        condition = new_condition
-      end
-
-      condition
-    end
-
-    def strict_parse(markup)
-      p = Parser.new(markup)
-      condition = parse_binary_comparisons(p)
-      p.consume(:end_of_string)
-      condition
-    end
-
-    def parse_binary_comparisons(p)
-      condition = parse_comparison(p)
-      first_condition = condition
-      while (op = (p.id?('and') || p.id?('or')))
-        child_condition = parse_comparison(p)
-        condition.send(op, child_condition)
-        condition = child_condition
-      end
-      first_condition
-    end
-
-    def parse_comparison(p)
-      a = Expression.parse(p.expression)
-      if (op = p.consume?(:comparison))
-        b = Expression.parse(p.expression)
-        Condition.new(a, op, b)
-      else
-        Condition.new(a)
-      end
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        @node.blocks
-      end
-    end
  end

  Template.register_tag('if', If)
--- a/lib/liquid/tags/ifchanged.rb
+++ b/lib/liquid/tags/ifchanged.rb
@@ -1,19 +1,20 @@
-# frozen_string_literal: true
-
 module Liquid
  class Ifchanged < Block
-    def render_to_output_buffer(context, output)
-      block_output = +''
-      super(context, block_output)
-
-      if block_output != context.registers[:ifchanged]
-        context.registers[:ifchanged] = block_output
-        output << block_output
+            
+    def render(context)
+      context.stack do 
+        
+        output = render_all(@nodelist, context)
+        
+        if output != context.registers[:ifchanged]
+          context.registers[:ifchanged] = output
+          output
+        else
+          ''
+        end              
      end
-
-      output
    end
-  end
-
-  Template.register_tag('ifchanged', Ifchanged)
-end
+  end  
+  
+  Template.register_tag('ifchanged', Ifchanged)  
+end
--- a/lib/liquid/tags/include.rb
+++ b/lib/liquid/tags/include.rb
@@ -1,109 +1,78 @@
-# frozen_string_literal: true
-
 module Liquid
-  # Include allows templates to relate with other templates
-  #
-  # Simply include another template:
-  #
-  #   {% include 'product' %}
-  #
-  # Include a template with a local variable:
-  #
-  #   {% include 'product' with products[0] %}
-  #
-  # Include a template for a collection:
-  #
-  #   {% include 'product' for products %}
-  #
  class Include < Tag
-    SYNTAX = /(#{QuotedFragment}+)(\s+(?:with|for)\s+(#{QuotedFragment}+))?(\s+(?:as)\s+(#{VariableSegment}+))?/o
-    Syntax = SYNTAX
+    Syntax = /(#{QuotedFragment}+)(\s+(?:with|for)\s+(#{QuotedFragment}+))?/o
+  
+    def initialize(tag_name, markup, tokens)
+      if markup =~ Syntax

-    attr_reader :template_name_expr, :variable_name_expr, :attributes
-
-    def initialize(tag_name, markup, options)
-      super
-
-      if markup =~ SYNTAX
-
-        template_name = Regexp.last_match(1)
-        variable_name = Regexp.last_match(3)
-
-        @alias_name         = Regexp.last_match(5)
-        @variable_name_expr = variable_name ? Expression.parse(variable_name) : nil
-        @template_name_expr = Expression.parse(template_name)
-        @attributes         = {}
+        @template_name = $1
+        @variable_name = $3
+        @attributes    = {}

        markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = Expression.parse(value)
+          @attributes[key] = value
        end

      else
-        raise SyntaxError, options[:locale].t("errors.syntax.include")
-      end
-    end
-
-    def parse(_tokens)
-    end
-
-    def render_to_output_buffer(context, output)
-      template_name = context.evaluate(@template_name_expr)
-      raise ArgumentError, options[:locale].t("errors.argument.include") unless template_name
-
-      partial = PartialCache.load(
-        template_name,
-        context: context,
-        parse_context: parse_context
-      )
-
-      context_variable_name = @alias_name || template_name.split('/').last
-
-      variable = if @variable_name_expr
-        context.evaluate(@variable_name_expr)
-      else
-        context.find_variable(template_name, raise_on_not_found: false)
+        raise SyntaxError.new("Error in tag 'include' - Valid syntax: include '[template]' (with|for) [object|collection]")
      end

-      old_template_name = context.template_name
-      old_partial       = context.partial
-      begin
-        context.template_name = template_name
-        context.partial       = true
-        context.stack do
-          @attributes.each do |key, value|
-            context[key] = context.evaluate(value)
-          end
-
-          if variable.is_a?(Array)
-            variable.each do |var|
-              context[context_variable_name] = var
-              partial.render_to_output_buffer(context, output)
-            end
-          else
-            context[context_variable_name] = variable
-            partial.render_to_output_buffer(context, output)
-          end
+      super
+    end
+  
+    def parse(tokens)
+    end
+    
+    def render(context)
+      partial = load_cached_partial(context)
+      variable = context[@variable_name || @template_name[1..-2]]
+      
+      context.stack do
+        @attributes.each do |key, value|
+          context[key] = context[value]
        end
-      ensure
-        context.template_name = old_template_name
-        context.partial       = old_partial
-      end

-      output
-    end
-
-    alias_method :parse_context, :options
-    private :parse_context
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [
-          @node.template_name_expr,
-          @node.variable_name_expr,
-        ] + @node.attributes.values
+        if variable.is_a?(Array)
+          variable.collect do |variable|
+            context[@template_name[1..-2]] = variable
+            partial.render(context)
+          end
+        else
+          context[@template_name[1..-2]] = variable
+          partial.render(context)
+        end
      end
    end
+   
+    private
+      def load_cached_partial(context)
+        cached_partials = context.registers[:cached_partials] || {}
+        template_name = context[@template_name]
+
+        if cached = cached_partials[template_name]
+          return cached
+        end
+        source = read_template_from_file_system(context)
+        partial = Liquid::Template.parse(source)
+        cached_partials[template_name] = partial
+        context.registers[:cached_partials] = cached_partials
+        partial
+      end
+
+      def read_template_from_file_system(context)
+        file_system = context.registers[:file_system] || Liquid::Template.file_system
+      
+        # make read_template_file call backwards-compatible.
+        case file_system.method(:read_template_file).arity
+        when 1
+          file_system.read_template_file(context[@template_name])
+        when 2
+          file_system.read_template_file(context[@template_name], context)
+        else
+          raise ArgumentError, "file_system.read_template_file expects two parameters: (template_name, context)"
+        end
+      end
  end

-  Template.register_tag('include', Include)
+  Template.register_tag('include', Include)  
 end
--- a/lib/liquid/tags/increment.rb
+++ b/lib/liquid/tags/increment.rb
@@ -1,13 +1,12 @@
-# frozen_string_literal: true
-
 module Liquid
+  
  # increment is used in a place where one needs to insert a counter
  #     into a template, and needs the counter to survive across
  #     multiple instantiations of the template.
  #     (To achieve the survival, the application must keep the context)
  #
  #     if the variable does not exist, it is created with value 0.
-  #
+
  #   Hello: {% increment variable %}
  #
  # gives you:
@@ -17,19 +16,20 @@ module Liquid
  #    Hello: 2
  #
  class Increment < Tag
-    def initialize(tag_name, markup, options)
-      super
+    def initialize(tag_name, markup, tokens)      
      @variable = markup.strip
-    end

-    def render_to_output_buffer(context, output)
+      super    
+    end    
+  
+    def render(context)
      value = context.environments.first[@variable] ||= 0
      context.environments.first[@variable] = value + 1
-
-      output << value.to_s
-      output
+      value.to_s
    end
+  
+    private
  end
-
+  
  Template.register_tag('increment', Increment)
 end
--- a/lib/liquid/tags/raw.rb
+++ b/lib/liquid/tags/raw.rb
@@ -1,50 +1,21 @@
-# frozen_string_literal: true
-
 module Liquid
  class Raw < Block
-    Syntax = /\A\s*\z/
-    FullTokenPossiblyInvalid = /\A(.*)#{TagStart}\s*(\w+)\s*(.*)?#{TagEnd}\z/om
-
-    def initialize(tag_name, markup, parse_context)
-      super
-
-      ensure_valid_markup(tag_name, markup, parse_context)
-    end
-
    def parse(tokens)
-      @body = +''
-      while (token = tokens.shift)
-        if token =~ FullTokenPossiblyInvalid
-          @body << Regexp.last_match(1) if Regexp.last_match(1) != ""
-          return if block_delimiter == Regexp.last_match(2)
+      @nodelist ||= []
+      @nodelist.clear
+
+      while token = tokens.shift
+        if token =~ FullToken
+          if block_delimiter == $1
+            end_tag
+            return
+          end
        end
-        @body << token unless token.empty?
-      end
-
-      raise SyntaxError, parse_context.locale.t("errors.syntax.tag_never_closed", block_name: block_name)
-    end
-
-    def render_to_output_buffer(_context, output)
-      output << @body
-      output
-    end
-
-    def nodelist
-      [@body]
-    end
-
-    def blank?
-      @body.empty?
-    end
-
-    protected
-
-    def ensure_valid_markup(tag_name, markup, parse_context)
-      unless Syntax.match?(markup)
-        raise SyntaxError, parse_context.locale.t("errors.syntax.tag_unexpected_args", tag: tag_name)
+        @nodelist << token if not token.empty?
      end
    end
  end

  Template.register_tag('raw', Raw)
 end
+
--- a/lib/liquid/tags/render.rb
+++ b/lib/liquid/tags/render.rb
@@ -1,84 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class Render < Tag
-    FOR = 'for'
-    SYNTAX = /(#{QuotedString}+)(\s+(with|#{FOR})\s+(#{QuotedFragment}+))?(\s+(?:as)\s+(#{VariableSegment}+))?/o
-
-    disable_tags "include"
-
-    attr_reader :template_name_expr, :attributes
-
-    def initialize(tag_name, markup, options)
-      super
-
-      raise SyntaxError, options[:locale].t("errors.syntax.render") unless markup =~ SYNTAX
-
-      template_name = Regexp.last_match(1)
-      with_or_for = Regexp.last_match(3)
-      variable_name = Regexp.last_match(4)
-
-      @alias_name = Regexp.last_match(6)
-      @variable_name_expr = variable_name ? Expression.parse(variable_name) : nil
-      @template_name_expr = Expression.parse(template_name)
-      @for = (with_or_for == FOR)
-
-      @attributes = {}
-      markup.scan(TagAttributes) do |key, value|
-        @attributes[key] = Expression.parse(value)
-      end
-    end
-
-    def render_to_output_buffer(context, output)
-      render_tag(context, output)
-    end
-
-    def render_tag(context, output)
-      # Though we evaluate this here we will only ever parse it as a string literal.
-      template_name = context.evaluate(@template_name_expr)
-      raise ArgumentError, options[:locale].t("errors.argument.include") unless template_name
-
-      partial = PartialCache.load(
-        template_name,
-        context: context,
-        parse_context: parse_context
-      )
-
-      context_variable_name = @alias_name || template_name.split('/').last
-
-      render_partial_func = ->(var, forloop) {
-        inner_context               = context.new_isolated_subcontext
-        inner_context.template_name = template_name
-        inner_context.partial       = true
-        inner_context['forloop']    = forloop if forloop
-
-        @attributes.each do |key, value|
-          inner_context[key] = context.evaluate(value)
-        end
-        inner_context[context_variable_name] = var unless var.nil?
-        partial.render_to_output_buffer(inner_context, output)
-        forloop&.send(:increment!)
-      }
-
-      variable = @variable_name_expr ? context.evaluate(@variable_name_expr) : nil
-      if @for && variable.respond_to?(:each) && variable.respond_to?(:count)
-        forloop = Liquid::ForloopDrop.new(template_name, variable.count, nil)
-        variable.each { |var| render_partial_func.call(var, forloop) }
-      else
-        render_partial_func.call(variable, nil)
-      end
-
-      output
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [
-          @node.template_name_expr,
-        ] + @node.attributes.values
-      end
-    end
-  end
-
-  Template.register_tag('render', Render)
-end
--- a/lib/liquid/tags/table_row.rb
+++ b/lib/liquid/tags/table_row.rb
@@ -1,66 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class TableRow < Block
-    Syntax = /(\w+)\s+in\s+(#{QuotedFragment}+)/o
-
-    attr_reader :variable_name, :collection_name, :attributes
-
-    def initialize(tag_name, markup, options)
-      super
-      if markup =~ Syntax
-        @variable_name   = Regexp.last_match(1)
-        @collection_name = Expression.parse(Regexp.last_match(2))
-        @attributes      = {}
-        markup.scan(TagAttributes) do |key, value|
-          @attributes[key] = Expression.parse(value)
-        end
-      else
-        raise SyntaxError, options[:locale].t("errors.syntax.table_row")
-      end
-    end
-
-    def render_to_output_buffer(context, output)
-      (collection = context.evaluate(@collection_name)) || (return '')
-
-      from = @attributes.key?('offset') ? context.evaluate(@attributes['offset']).to_i : 0
-      to   = @attributes.key?('limit')  ? from + context.evaluate(@attributes['limit']).to_i : nil
-
-      collection = Utils.slice_collection(collection, from, to)
-      length     = collection.length
-
-      cols = context.evaluate(@attributes['cols']).to_i
-
-      output << "<tr class=\"row1\">\n"
-      context.stack do
-        tablerowloop = Liquid::TablerowloopDrop.new(length, cols)
-        context['tablerowloop'] = tablerowloop
-
-        collection.each do |item|
-          context[@variable_name] = item
-
-          output << "<td class=\"col#{tablerowloop.col}\">"
-          super
-          output << '</td>'
-
-          if tablerowloop.col_last && !tablerowloop.last
-            output << "</tr>\n<tr class=\"row#{tablerowloop.row + 1}\">"
-          end
-
-          tablerowloop.send(:increment!)
-        end
-      end
-
-      output << "</tr>\n"
-      output
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        super + @node.attributes.values + [@node.collection_name]
-      end
-    end
-  end
-
-  Template.register_tag('tablerow', TableRow)
-end
--- a/lib/liquid/tags/unless.rb
+++ b/lib/liquid/tags/unless.rb
@@ -1,30 +1,33 @@
-# frozen_string_literal: true
-
-require_relative 'if'
+require File.dirname(__FILE__) + '/if'

 module Liquid
+
  # Unless is a conditional just like 'if' but works on the inverse logic.
  #
-  #   {% unless x < 0 %} x is greater than zero {% endunless %}
+  #   {% unless x < 0 %} x is greater than zero {% end %}
  #
  class Unless < If
-    def render_to_output_buffer(context, output)
-      # First condition is interpreted backwards ( if not )
-      first_block = @blocks.first
-      unless first_block.evaluate(context)
-        return first_block.attachment.render_to_output_buffer(context, output)
-      end
-
-      # After the first condition unless works just like if
-      @blocks[1..-1].each do |block|
-        if block.evaluate(context)
-          return block.attachment.render_to_output_buffer(context, output)
+    def render(context)
+      context.stack do
+        
+        # First condition is interpreted backwards ( if not )
+        block = @blocks.first
+        unless block.evaluate(context)
+          return render_all(block.attachment, context)
        end
+        
+        # After the first condition unless works just like if
+        @blocks[1..-1].each do |block|
+          if block.evaluate(context)
+            return render_all(block.attachment, context)
+          end
+        end
+        
+        ''
      end
-
-      output
    end
  end
+  

  Template.register_tag('unless', Unless)
-end
+end
--- a/lib/liquid/template.rb
+++ b/lib/liquid/template.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 module Liquid
+
  # Templates are central to liquid.
  # Interpretating templates is a two step process. First you compile the
  # source code you got. During compile time some extensive error checking is performed.
@@ -16,127 +15,47 @@ module Liquid
  #
  class Template
    attr_accessor :root
-    attr_reader :resource_limits, :warnings
-
-    class TagRegistry
-      include Enumerable
-
-      def initialize
-        @tags  = {}
-        @cache = {}
-      end
-
-      def [](tag_name)
-        return nil unless @tags.key?(tag_name)
-        return @cache[tag_name] if Liquid.cache_classes
-
-        lookup_class(@tags[tag_name]).tap { |o| @cache[tag_name] = o }
-      end
-
-      def []=(tag_name, klass)
-        @tags[tag_name]  = klass.name
-        @cache[tag_name] = klass
-      end
-
-      def delete(tag_name)
-        @tags.delete(tag_name)
-        @cache.delete(tag_name)
-      end
-
-      def each(&block)
-        @tags.each(&block)
-      end
-
-      private
-
-      def lookup_class(name)
-        Object.const_get(name)
-      end
-    end
-
-    attr_reader :profiler
+    @@file_system = BlankFileSystem.new

    class << self
-      # Sets how strict the parser should be.
-      # :lax acts like liquid 2.5 and silently ignores malformed tags in most cases.
-      # :warn is the default and will give deprecation warnings when invalid syntax is used.
-      # :strict will enforce correct syntax.
-      attr_accessor :error_mode
-      Template.error_mode = :lax
-
-      attr_reader :taint_mode
-
-      # Sets how strict the taint checker should be.
-      # :lax is the default, and ignores the taint flag completely
-      # :warn adds a warning, but does not interrupt the rendering
-      # :error raises an error when tainted output is used
-      # @deprecated Since it is being deprecated in ruby itself.
-      def taint_mode=(mode)
-        taint_supported = Object.new.taint.tainted?
-        if mode != :lax && !taint_supported
-          raise NotImplementedError, "#{RUBY_ENGINE} #{RUBY_VERSION} doesn't support taint checking"
-        end
-        @taint_mode = mode
+      def file_system
+        @@file_system
      end

-      Template.taint_mode = :lax
-
-      attr_accessor :default_exception_renderer
-      Template.default_exception_renderer = lambda do |exception|
-        exception
+      def file_system=(obj)
+        @@file_system = obj
      end

-      attr_accessor :file_system
-      Template.file_system = BlankFileSystem.new
-
-      attr_accessor :tags
-      Template.tags = TagRegistry.new
-      private :tags=
-
      def register_tag(name, klass)
        tags[name.to_s] = klass
      end

-      attr_accessor :registers
-      Template.registers = {}
-      private :registers=
-
-      def add_register(name, klass)
-        registers[name.to_sym] = klass
+      def tags
+        @tags ||= {}
      end

      # Pass a module with filter methods which should be available
      # to all liquid views. Good for registering the standard library
      def register_filter(mod)
-        StrainerFactory.add_global_filter(mod)
+        Strainer.global_filter(mod)
      end

-      attr_accessor :default_resource_limits
-      Template.default_resource_limits = {}
-      private :default_resource_limits=
-
      # creates a new <tt>Template</tt> object from liquid source code
-      # To enable profiling, pass in <tt>profile: true</tt> as an option.
-      # See Liquid::Profiler for more information
-      def parse(source, options = {})
-        new.parse(source, options)
+      def parse(source)
+        template = Template.new
+        template.parse(source)
+        template
      end
    end

+    # creates a new <tt>Template</tt> from an array of tokens. Use <tt>Template.parse</tt> instead
    def initialize
-      @rethrow_errors  = false
-      @resource_limits = ResourceLimits.new(Template.default_resource_limits)
    end

    # Parse source code.
    # Returns self for easy chaining
-    def parse(source, options = {})
-      @options      = options
-      @profiling    = options[:profile]
-      @line_numbers = options[:line_numbers] || @profiling
-      parse_context = options.is_a?(ParseContext) ? options : ParseContext.new(options)
-      @root         = Document.parse(tokenize(source), parse_context)
-      @warnings     = parse_context.warnings
+    def parse(source)
+      @root = Document.new(tokenize(source))
      self
    end

@@ -161,9 +80,6 @@ module Liquid
    # if you use the same filters over and over again consider registering them globally
    # with <tt>Template.register_filter</tt>
    #
-    # if profiling was enabled in <tt>Template#parse</tt> then the resulting profiling information
-    # will be available via <tt>Template#profiler</tt>
-    #
    # Following options can be passed:
    #
    #  * <tt>filters</tt> : array with local filters
@@ -172,103 +88,63 @@ module Liquid
    #
    def render(*args)
      return '' if @root.nil?
-
+      
      context = case args.first
      when Liquid::Context
-        c = args.shift
-
-        if @rethrow_errors
-          c.exception_renderer = ->(_e) { raise }
-        end
-
-        c
-      when Liquid::Drop
-        drop         = args.shift
-        drop.context = Context.new([drop, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits)
+        args.shift
      when Hash
-        Context.new([args.shift, assigns], instance_assigns, registers, @rethrow_errors, @resource_limits)
+        Context.new([args.shift, assigns], instance_assigns, registers, @rethrow_errors)
      when nil
-        Context.new(assigns, instance_assigns, registers, @rethrow_errors, @resource_limits)
+        Context.new(assigns, instance_assigns, registers, @rethrow_errors)
      else
-        raise ArgumentError, "Expected Hash or Liquid::Context as parameter"
+        raise ArgumentError, "Expect Hash or Liquid::Context as parameter"
      end

-      output = nil
-
-      context_register = context.registers.is_a?(StaticRegisters) ? context.registers.static : context.registers
-
      case args.last
      when Hash
        options = args.pop
-        output  = options[:output] if options[:output]

-        options[:registers]&.each do |key, register|
-          context_register[key] = register
+        if options[:registers].is_a?(Hash)
+          self.registers.merge!(options[:registers])
        end

-        apply_options_to_context(context, options)
-      when Module, Array
+        if options[:filters]
+          context.add_filters(options[:filters])
+        end
+
+      when Module
+        context.add_filters(args.pop)
+      when Array
        context.add_filters(args.pop)
      end

-      Template.registers.each do |key, register|
-        context_register[key] = register unless context_register.key?(key)
-      end
-
-      # Retrying a render resets resource usage
-      context.resource_limits.reset
-
      begin
        # render the nodelist.
-        # for performance reasons we get an array back here. join will make a string out of it.
-        with_profiling(context) do
-          @root.render_to_output_buffer(context, output || +'')
-        end
-      rescue Liquid::MemoryError => e
-        context.handle_error(e)
+        # for performance reasons we get a array back here. join will make a string out of it
+        result = @root.render(context)
+        result.respond_to?(:join) ? result.join : result
      ensure
        @errors = context.errors
      end
    end

    def render!(*args)
-      @rethrow_errors = true
-      render(*args)
-    end
-
-    def render_to_output_buffer(context, output)
-      render(context, output: output)
+      @rethrow_errors = true; render(*args)
    end

    private

+    # Uses the <tt>Liquid::TemplateParser</tt> regexp to tokenize the passed source
    def tokenize(source)
-      Tokenizer.new(source, @line_numbers)
+      source = source.source if source.respond_to?(:source)
+      return [] if source.to_s.empty?
+      tokens = source.split(TemplateParser)
+
+      # removes the rogue empty element at the beginning of the array
+      tokens.shift if tokens[0] and tokens[0].empty?
+
+      tokens
    end

-    def with_profiling(context)
-      if @profiling && !context.partial
-        raise "Profiler not loaded, require 'liquid/profiler' first" unless defined?(Liquid::Profiler)
-
-        @profiler = Profiler.new(context.template_name)
-        @profiler.start
-
-        begin
-          yield
-        ensure
-          @profiler.stop
-        end
-      else
-        yield
-      end
-    end
-
-    def apply_options_to_context(context, options)
-      context.add_filters(options[:filters]) if options[:filters]
-      context.global_filter      = options[:global_filter] if options[:global_filter]
-      context.exception_renderer = options[:exception_renderer] if options[:exception_renderer]
-      context.strict_variables   = options[:strict_variables] if options[:strict_variables]
-      context.strict_filters     = options[:strict_filters] if options[:strict_filters]
-    end
  end
 end
--- a/lib/liquid/template_factory.rb
+++ b/lib/liquid/template_factory.rb
@@ -1,9 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class TemplateFactory
-    def for(_template_name)
-      Liquid::Template.new
-    end
-  end
-end
--- a/lib/liquid/tokenizer.rb
+++ b/lib/liquid/tokenizer.rb
@@ -1,39 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class Tokenizer
-    attr_reader :line_number, :for_liquid_tag
-
-    def initialize(source, line_numbers = false, line_number: nil, for_liquid_tag: false)
-      @source         = source
-      @line_number    = line_number || (line_numbers ? 1 : nil)
-      @for_liquid_tag = for_liquid_tag
-      @tokens         = tokenize
-    end
-
-    def shift
-      (token = @tokens.shift) || return
-
-      if @line_number
-        @line_number += @for_liquid_tag ? 1 : token.count("\n")
-      end
-
-      token
-    end
-
-    private
-
-    def tokenize
-      return [] if @source.to_s.empty?
-
-      return @source.split("\n") if @for_liquid_tag
-
-      tokens = @source.split(TemplateParser)
-
-      # removes the rogue empty element at the beginning of the array
-      tokens.shift if tokens[0]&.empty?
-
-      tokens
-    end
-  end
-end
--- a/lib/liquid/usage.rb
+++ b/lib/liquid/usage.rb
@@ -1,8 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  module Usage
-    def self.increment(name)
-    end
-  end
-end
--- a/lib/liquid/utils.rb
+++ b/lib/liquid/utils.rb
@@ -1,26 +1,15 @@
-# frozen_string_literal: true
-
 module Liquid
  module Utils
-    def self.slice_collection(collection, from, to)
-      if (from != 0 || !to.nil?) && collection.respond_to?(:load_slice)
-        collection.load_slice(from, to)
-      else
-        slice_collection_using_each(collection, from, to)
-      end
-    end
-
    def self.slice_collection_using_each(collection, from, to)
      segments = []
-      index    = 0
+      index = 0
+      yielded = 0

      # Maintains Ruby 1.8.7 String#each behaviour on 1.9
-      if collection.is_a?(String)
-        return collection.empty? ? [] : [collection]
-      end
-      return [] unless collection.respond_to?(:each)
+      return [collection] if non_blank_string?(collection)

      collection.each do |item|
+
        if to && to <= index
          break
        end
@@ -35,51 +24,8 @@ module Liquid
      segments
    end

-    def self.to_integer(num)
-      return num if num.is_a?(Integer)
-      num = num.to_s
-      begin
-        Integer(num)
-      rescue ::ArgumentError
-        raise Liquid::ArgumentError, "invalid integer"
-      end
-    end
-
-    def self.to_number(obj)
-      case obj
-      when Float
-        BigDecimal(obj.to_s)
-      when Numeric
-        obj
-      when String
-        /\A-?\d+\.\d+\z/.match?(obj.strip) ? BigDecimal(obj) : obj.to_i
-      else
-        if obj.respond_to?(:to_number)
-          obj.to_number
-        else
-          0
-        end
-      end
-    end
-
-    def self.to_date(obj)
-      return obj if obj.respond_to?(:strftime)
-
-      if obj.is_a?(String)
-        return nil if obj.empty?
-        obj = obj.downcase
-      end
-
-      case obj
-      when 'now', 'today'
-        Time.now
-      when /\A\d+\z/, Integer
-        Time.at(obj.to_i)
-      when String
-        Time.parse(obj)
-      end
-    rescue ::ArgumentError
-      nil
+    def self.non_blank_string?(collection)
+      collection.is_a?(String) && collection != ''
    end
  end
 end
--- a/lib/liquid/variable.rb
+++ b/lib/liquid/variable.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 module Liquid
+
  # Holds variables. Variables are only loaded "just in time"
  # and are not evaluated as part of the render stage
  #
@@ -12,158 +11,46 @@ module Liquid
  #   {{ user | link }}
  #
  class Variable
-    FilterMarkupRegex        = /#{FilterSeparator}\s*(.*)/om
-    FilterParser             = /(?:\s+|#{QuotedFragment}|#{ArgumentSeparator})+/o
-    FilterArgsRegex          = /(?:#{FilterArgumentSeparator}|#{ArgumentSeparator})\s*((?:\w+\s*\:\s*)?#{QuotedFragment})/o
-    JustTagAttributes        = /\A#{TagAttributes}\z/o
-    MarkupWithQuotedFragment = /(#{QuotedFragment})(.*)/om
+    FilterParser = /(?:#{FilterSeparator}|(?:\s*(?:#{QuotedFragment}|#{ArgumentSeparator})\s*)+)/o
+    attr_accessor :filters, :name

-    attr_accessor :filters, :name, :line_number
-    attr_reader :parse_context
-    alias_method :options, :parse_context
-
-    include ParserSwitching
-
-    def initialize(markup, parse_context)
-      @markup        = markup
-      @name          = nil
-      @parse_context = parse_context
-      @line_number   = parse_context.line_number
-
-      parse_with_selected_parser(markup)
-    end
-
-    def raw
-      @markup
-    end
-
-    def markup_context(markup)
-      "in \"{{#{markup}}}\""
-    end
-
-    def lax_parse(markup)
+    def initialize(markup)
+      @markup  = markup
+      @name    = nil
      @filters = []
-      return unless markup =~ MarkupWithQuotedFragment
-
-      name_markup   = Regexp.last_match(1)
-      filter_markup = Regexp.last_match(2)
-      @name         = Expression.parse(name_markup)
-      if filter_markup =~ FilterMarkupRegex
-        filters = Regexp.last_match(1).scan(FilterParser)
-        filters.each do |f|
-          next unless f =~ /\w+/
-          filtername = Regexp.last_match(0)
-          filterargs = f.scan(FilterArgsRegex).flatten
-          @filters << parse_filter_expressions(filtername, filterargs)
+      if match = markup.match(/\s*(#{QuotedFragment})(.*)/o)
+        @name = match[1]
+        if match[2].match(/#{FilterSeparator}\s*(.*)/o)
+          filters = Regexp.last_match(1).scan(FilterParser)
+          filters.each do |f|
+            if matches = f.match(/\s*(#{WordRegex}+)(?:\s*#{FilterArgumentSeparator}(.*))?/)
+              filtername = matches[1]
+              filterargs = matches[2].to_s.scan(/(?:\A|#{ArgumentSeparator})\s*((?:\w+\s*\:\s*)?#{QuotedFragment})/o).flatten
+              @filters << [filtername, filterargs]
+            end
+          end
        end
      end
    end

-    def strict_parse(markup)
-      @filters = []
-      p = Parser.new(markup)
-
-      @name = Expression.parse(p.expression)
-      while p.consume?(:pipe)
-        filtername = p.consume(:id)
-        filterargs = p.consume?(:colon) ? parse_filterargs(p) : []
-        @filters << parse_filter_expressions(filtername, filterargs)
-      end
-      p.consume(:end_of_string)
-    end
-
-    def parse_filterargs(p)
-      # first argument
-      filterargs = [p.argument]
-      # followed by comma separated others
-      filterargs << p.argument while p.consume?(:comma)
-      filterargs
-    end
-
    def render(context)
-      obj = @filters.inject(context.evaluate(@name)) do |output, (filter_name, filter_args, filter_kwargs)|
-        filter_args = evaluate_filter_expressions(context, filter_args, filter_kwargs)
-        context.invoke(filter_name, output, *filter_args)
-      end
-
-      obj = context.apply_global_filter(obj)
-      taint_check(context, obj)
-      obj
-    end
-
-    def render_to_output_buffer(context, output)
-      obj = render(context)
-
-      if obj.is_a?(Array)
-        output << obj.join
-      elsif obj.nil?
-      else
-        output << obj.to_s
-      end
-
-      output
-    end
-
-    def disabled?(_context)
-      false
-    end
-
-    def disabled_tags
-      []
-    end
-
-    private
-
-    def parse_filter_expressions(filter_name, unparsed_args)
-      filter_args  = []
-      keyword_args = nil
-      unparsed_args.each do |a|
-        if (matches = a.match(JustTagAttributes))
-          keyword_args           ||= {}
-          keyword_args[matches[1]] = Expression.parse(matches[2])
-        else
-          filter_args << Expression.parse(a)
+      return '' if @name.nil?
+      @filters.inject(context[@name]) do |output, filter|
+        filterargs = []
+        keyword_args = {}
+        filter[1].to_a.each do |a|
+          if matches = a.match(/\A#{TagAttributes}\z/o)
+            keyword_args[matches[1]] = context[matches[2]]
+          else
+            filterargs << context[a]
+          end
        end
-      end
-      result = [filter_name, filter_args]
-      result << keyword_args if keyword_args
-      result
-    end
-
-    def evaluate_filter_expressions(context, filter_args, filter_kwargs)
-      parsed_args = filter_args.map { |expr| context.evaluate(expr) }
-      if filter_kwargs
-        parsed_kwargs = {}
-        filter_kwargs.each do |key, expr|
-          parsed_kwargs[key] = context.evaluate(expr)
+        filterargs << keyword_args unless keyword_args.empty?
+        begin
+          output = context.invoke(filter[0], output, *filterargs)
+        rescue FilterNotFound
+          raise FilterNotFound, "Error - filter '#{filter[0]}' in '#{@markup.strip}' could not be found."
        end
-        parsed_args << parsed_kwargs
-      end
-      parsed_args
-    end
-
-    def taint_check(context, obj)
-      return if Template.taint_mode == :lax
-      return unless obj.tainted?
-
-      @markup =~ QuotedFragment
-      name = Regexp.last_match(0)
-
-      error               = TaintedError.new("variable '#{name}' is tainted and was not escaped")
-      error.line_number   = line_number
-      error.template_name = context.template_name
-
-      case Template.taint_mode
-      when :warn
-        context.warnings << error
-      when :error
-        raise error
-      end
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        [@node.name] + @node.filters.flatten
      end
    end
  end
--- a/lib/liquid/variable_lookup.rb
+++ b/lib/liquid/variable_lookup.rb
@@ -1,90 +0,0 @@
-# frozen_string_literal: true
-
-module Liquid
-  class VariableLookup
-    SQUARE_BRACKETED = /\A\[(.*)\]\z/m
-    COMMAND_METHODS  = ['size', 'first', 'last'].freeze
-
-    attr_reader :name, :lookups
-
-    def self.parse(markup)
-      new(markup)
-    end
-
-    def initialize(markup)
-      lookups = markup.scan(VariableParser)
-
-      name = lookups.shift
-      if name =~ SQUARE_BRACKETED
-        name = Expression.parse(Regexp.last_match(1))
-      end
-      @name = name
-
-      @lookups       = lookups
-      @command_flags = 0
-
-      @lookups.each_index do |i|
-        lookup = lookups[i]
-        if lookup =~ SQUARE_BRACKETED
-          lookups[i] = Expression.parse(Regexp.last_match(1))
-        elsif COMMAND_METHODS.include?(lookup)
-          @command_flags |= 1 << i
-        end
-      end
-    end
-
-    def evaluate(context)
-      name   = context.evaluate(@name)
-      object = context.find_variable(name)
-
-      @lookups.each_index do |i|
-        key = context.evaluate(@lookups[i])
-
-        # If object is a hash- or array-like object we look for the
-        # presence of the key and if its available we return it
-        if object.respond_to?(:[]) &&
-            ((object.respond_to?(:key?) && object.key?(key)) ||
-             (object.respond_to?(:fetch) && key.is_a?(Integer)))
-
-          # if its a proc we will replace the entry with the proc
-          res    = context.lookup_and_evaluate(object, key)
-          object = res.to_liquid
-
-          # Some special cases. If the part wasn't in square brackets and
-          # no key with the same name was found we interpret following calls
-          # as commands and call them on the current object
-        elsif @command_flags & (1 << i) != 0 && object.respond_to?(key)
-          object = object.send(key).to_liquid
-
-          # No key was present with the desired value and it wasn't one of the directly supported
-          # keywords either. The only thing we got left is to return nil or
-          # raise an exception if `strict_variables` option is set to true
-        else
-          return nil unless context.strict_variables
-          raise Liquid::UndefinedVariable, "undefined variable #{key}"
-        end
-
-        # If we are dealing with a drop here we have to
-        object.context = context if object.respond_to?(:context=)
-      end
-
-      object
-    end
-
-    def ==(other)
-      self.class == other.class && state == other.state
-    end
-
-    protected
-
-    def state
-      [@name, @lookups, @command_flags]
-    end
-
-    class ParseTreeVisitor < Liquid::ParseTreeVisitor
-      def children
-        @node.lookups
-      end
-    end
-  end
-end
--- a/lib/liquid/version.rb
+++ b/lib/liquid/version.rb
@@ -1,6 +0,0 @@
-# encoding: utf-8
-# frozen_string_literal: true
-
-module Liquid
-  VERSION = "4.0.3"
-end
--- a/liquid.gemspec
+++ b/liquid.gemspec
@@ -1,32 +1,21 @@
 # encoding: utf-8
-# frozen_string_literal: true
-
-lib = File.expand_path('../lib/', __FILE__)
-$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
-
-require "liquid/version"

 Gem::Specification.new do |s|
  s.name        = "liquid"
-  s.version     = Liquid::VERSION
+  s.version     = "2.5.0"
  s.platform    = Gem::Platform::RUBY
  s.summary     = "A secure, non-evaling end user template engine with aesthetic markup."
-  s.authors     = ["Tobias Lütke"]
+  s.authors     = ["Tobias Luetke"]
  s.email       = ["tobi@leetsoft.com"]
  s.homepage    = "http://www.liquidmarkup.org"
-  s.license     = "MIT"
-  # s.description = "A secure, non-evaling end user template engine with aesthetic markup."
+  #s.description = "A secure, non-evaling end user template engine with aesthetic markup."

-  s.required_ruby_version     = ">= 2.4.0"
  s.required_rubygems_version = ">= 1.3.7"

  s.test_files  = Dir.glob("{test}/**/*")
-  s.files       = Dir.glob("{lib}/**/*") + %w(LICENSE README.md)
+  s.files       = Dir.glob("{lib}/**/*") + %w(MIT-LICENSE README.md)

-  s.extra_rdoc_files = ["History.md", "README.md"]
+  s.extra_rdoc_files  = ["History.md", "README.md"]

  s.require_path = "lib"
-
-  s.add_development_dependency('rake', '~> 11.3')
-  s.add_development_dependency('minitest')
 end
--- a/performance/benchmark.rb
+++ b/performance/benchmark.rb
@@ -1,20 +1,11 @@
-# frozen_string_literal: true
+require 'rubygems'
+require 'benchmark'
+require File.dirname(__FILE__) + '/theme_runner'

-require 'benchmark/ips'
-require_relative 'theme_runner'
-
-Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 profiler = ThemeRunner.new

-Benchmark.ips do |x|
-  x.time   = 10
-  x.warmup = 5
-
-  puts
-  puts "Running benchmark for #{x.time} seconds (with #{x.warmup} seconds warmup)."
-  puts
-
-  x.report("parse:") { profiler.compile }
-  x.report("render:") { profiler.render }
-  x.report("parse & render:") { profiler.run }
+Benchmark.bmbm do |x|
+  x.report("parse:")   { 100.times { profiler.compile } }
+  x.report("parse & run:")   { 100.times { profiler.run } }
 end
+
--- a/performance/memory_profile.rb
+++ b/performance/memory_profile.rb
@@ -1,63 +0,0 @@
-# frozen_string_literal: true
-
-require 'benchmark/ips'
-require 'memory_profiler'
-require 'terminal-table'
-require_relative 'theme_runner'
-
-class Profiler
-  LOG_LABEL   = "Profiling: ".rjust(14).freeze
-  REPORTS_DIR = File.expand_path('.memprof', __dir__).freeze
-
-  def self.run
-    puts
-    yield new
-  end
-
-  def initialize
-    @allocated = []
-    @retained  = []
-    @headings  = []
-  end
-
-  def profile(phase, &block)
-    print(LOG_LABEL)
-    print("#{phase}.. ".ljust(10))
-    report = MemoryProfiler.report(&block)
-    puts 'Done.'
-    @headings  << phase.capitalize
-    @allocated << "#{report.scale_bytes(report.total_allocated_memsize)} (#{report.total_allocated} objects)"
-    @retained  << "#{report.scale_bytes(report.total_retained_memsize)} (#{report.total_retained} objects)"
-
-    return if ENV['CI']
-
-    require 'fileutils'
-    report_file = File.join(REPORTS_DIR, "#{sanitize(phase)}.txt")
-    FileUtils.mkdir_p(REPORTS_DIR)
-    report.pretty_print(to_file: report_file, scale_bytes: true)
-  end
-
-  def tabulate
-    table = Terminal::Table.new(headings: @headings.unshift('Phase')) do |t|
-      t << @allocated.unshift('Total allocated')
-      t << @retained.unshift('Total retained')
-    end
-
-    puts
-    puts table
-    puts "\nDetailed report(s) saved to #{REPORTS_DIR}/" unless ENV['CI']
-  end
-
-  def sanitize(string)
-    string.downcase.gsub(/[\W]/, '-').squeeze('-')
-  end
-end
-
-Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
-
-runner = ThemeRunner.new
-Profiler.run do |x|
-  x.profile('parse') { runner.compile }
-  x.profile('render') { runner.render }
-  x.tabulate
-end
--- a/performance/profile.rb
+++ b/performance/profile.rb
@@ -1,26 +1,19 @@
-# frozen_string_literal: true
+require 'rubygems'
+require 'ruby-prof' rescue fail("install ruby-prof extension/gem")
+require File.dirname(__FILE__) + '/theme_runner'

-require 'stackprof'
-require_relative 'theme_runner'
-
-Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 profiler = ThemeRunner.new
-profiler.run

-[:cpu, :object].each do |profile_type|
-  puts "Profiling in #{profile_type} mode..."
-  results = StackProf.run(mode: profile_type) do
-    200.times do
-      profiler.run
-    end
-  end
+puts 'Running profiler...'

-  if profile_type == :cpu && (graph_filename = ENV['GRAPH_FILENAME'])
-    File.open(graph_filename, 'w') do |f|
-      StackProf::Report.new(results).print_graphviz(nil, f)
-    end
-  end
+results  = profiler.run

-  StackProf::Report.new(results).print_text(false, 20)
-  File.write(ENV['FILENAME'] + "." + profile_type.to_s, Marshal.dump(results)) if ENV['FILENAME']
+puts 'Success'
+puts
+
+[RubyProf::FlatPrinter, RubyProf::GraphPrinter, RubyProf::GraphHtmlPrinter, RubyProf::CallTreePrinter].each do |klass|
+  filename = (ENV['TMP'] || '/tmp') + (klass.name.include?('Html') ? "/liquid.#{klass.name.downcase}.html" : "/callgrind.liquid.#{klass.name.downcase}.txt")
+  filename.gsub!(/:+/, '_')
+  File.open(filename, "w+") { |fp| klass.new(results).print(fp, :print_file => true) }
+  $stderr.puts "wrote #{klass.name} output to #{filename}"
 end
--- a/performance/shopify/comment_form.rb
+++ b/performance/shopify/comment_form.rb
@@ -1,37 +1,33 @@
-# frozen_string_literal: true
-
-class CommentForm < Liquid::Block
-  Syntax = /(#{Liquid::VariableSignature}+)/
-
-  def initialize(tag_name, markup, options)
-    super
+class CommentForm < Liquid::Block                                             
+  Syntax = /(#{Liquid::VariableSignature}+)/   

+  def initialize(tag_name, markup, tokens)
    if markup =~ Syntax
-      @variable_name = Regexp.last_match(1)
-      @attributes    = {}
+      @variable_name = $1
+      @attributes = {}
    else
-      raise SyntaxError, "Syntax Error in 'comment_form' - Valid syntax: comment_form [article]"
+      raise SyntaxError.new("Syntax Error in 'comment_form' - Valid syntax: comment_form [article]")
    end
+    
+    super
  end

-  def render_to_output_buffer(context, output)
+  def render(context)          
    article = context[@variable_name]
-
-    context.stack do
+              
+    context.stack do       
      context['form'] = {
        'posted_successfully?' => context.registers[:posted_successfully],
        'errors' => context['comment.errors'],
        'author' => context['comment.author'],
-        'email' => context['comment.email'],
-        'body' => context['comment.body'],
+        'email'  => context['comment.email'],
+        'body'   => context['comment.body']
      }
-
-      output << wrap_in_form(article, render_all(@nodelist, context, output))
-      output
+      wrap_in_form(article, render_all(@nodelist, context))
    end
-  end
-
-  def wrap_in_form(article, input)
-    %(<form id="article-#{article.id}-comment-form" class="comment-form" method="post" action="">\n#{input}\n</form>)
+  end          
+    
+  def wrap_in_form(article, input)    
+    %Q{<form id="article-#{article.id}-comment-form" class="comment-form" method="post" action="">\n#{input}\n</form>}    
  end
 end
--- a/performance/shopify/database.rb
+++ b/performance/shopify/database.rb
@@ -1,48 +1,45 @@
-# frozen_string_literal: true
-
 require 'yaml'
-
 module Database
-  # Load the standard vision toolkit database and re-arrage it to be simply exportable
+  
+  # Load the standard vision toolkit database and re-arrage it to be simply exportable 
  # to liquid as assigns. All this is based on Shopify
  def self.tables
-    @tables ||= begin
-      db = YAML.load_file("#{__dir__}/vision.database.yml")
+    @tables ||= begin      
+      db = YAML.load_file(File.dirname(__FILE__) + '/vision.database.yml')

-      # From vision source
+      # From vision source      
      db['products'].each do |product|
        collections = db['collections'].find_all do |collection|
          collection['products'].any? { |p| p['id'].to_i == product['id'].to_i }
-        end
-        product['collections'] = collections
+        end      
+        product['collections'] = collections      
      end

-      # key the tables by handles, as this is how liquid expects it.
-      db = db.each_with_object({}) do |(key, values), assigns|
-        assigns[key] = values.each_with_object({}) do |v, h|
-          h[v['handle']] = v
-        end
-      end
-
-      # Some standard direct accessors so that the specialized templates
+      # key the tables by handles, as this is how liquid expects it.      
+      db = db.inject({}) do |assigns, (key, values)|
+        assigns[key] = values.inject({}) { |h, v| h[v['handle']] = v; h; }
+        assigns
+      end  
+      
+      # Some standard direct accessors so that the specialized templates 
      # render correctly
      db['collection'] = db['collections'].values.first
      db['product']    = db['products'].values.first
      db['blog']       = db['blogs'].values.first
      db['article']    = db['blog']['articles'].first
-
-      db['cart']       = {
-        'total_price' => db['line_items'].values.inject(0) { |sum, item| sum + item['line_price'] * item['quantity'] },
-        'item_count' => db['line_items'].values.inject(0) { |sum, item| sum + item['quantity'] },
-        'items' => db['line_items'].values,
+            
+      db['cart']       = { 
+        'total_price' => db['line_items'].values.inject(0) { |sum, item| sum += item['line_price'] * item['quantity'] },
+        'item_count'  => db['line_items'].values.inject(0) { |sum, item| sum += item['quantity'] },
+        'items'       => db['line_items'].values
      }
-
+            
      db
-    end
+    end    
  end
 end

-if __FILE__ == $PROGRAM_NAME
-  p(Database.tables['collections']['frontpage'].keys)
-  # p Database.tables['blog']['articles']
-end
+if __FILE__ == $0
+  p Database.tables['collections']['frontpage'].keys
+  #p Database.tables['blog']['articles']
+end
--- a/performance/shopify/json_filter.rb
+++ b/performance/shopify/json_filter.rb
@@ -1,9 +1,7 @@
-# frozen_string_literal: true
-
-require 'json'
-
 module JsonFilter
+  
  def json(object)
-    JSON.dump(object.reject { |k, _v| k == "collections" })
+    object.reject {|k,v| k == "collections" }.to_json
  end
-end
+  
+end
--- a/performance/shopify/liquid.rb
+++ b/performance/shopify/liquid.rb
@@ -1,21 +1,19 @@
-# frozen_string_literal: true
+$:.unshift File.dirname(__FILE__) + '/../../lib'
+require File.dirname(__FILE__) + '/../../lib/liquid'

-$LOAD_PATH.unshift(__dir__ + '/../../lib')
-require_relative '../../lib/liquid'
+require File.dirname(__FILE__) + '/comment_form'
+require File.dirname(__FILE__) + '/paginate'
+require File.dirname(__FILE__) + '/json_filter'
+require File.dirname(__FILE__) + '/money_filter'
+require File.dirname(__FILE__) + '/shop_filter'
+require File.dirname(__FILE__) + '/tag_filter'
+require File.dirname(__FILE__) + '/weight_filter'

-require_relative 'comment_form'
-require_relative 'paginate'
-require_relative 'json_filter'
-require_relative 'money_filter'
-require_relative 'shop_filter'
-require_relative 'tag_filter'
-require_relative 'weight_filter'
+Liquid::Template.register_tag 'paginate', Paginate
+Liquid::Template.register_tag 'form', CommentForm

-Liquid::Template.register_tag('paginate', Paginate)
-Liquid::Template.register_tag('form', CommentForm)
-
-Liquid::Template.register_filter(JsonFilter)
-Liquid::Template.register_filter(MoneyFilter)
-Liquid::Template.register_filter(WeightFilter)
-Liquid::Template.register_filter(ShopFilter)
-Liquid::Template.register_filter(TagFilter)
+Liquid::Template.register_filter JsonFilter
+Liquid::Template.register_filter MoneyFilter
+Liquid::Template.register_filter WeightFilter
+Liquid::Template.register_filter ShopFilter
+Liquid::Template.register_filter TagFilter
--- a/performance/shopify/money_filter.rb
+++ b/performance/shopify/money_filter.rb
@@ -1,19 +1,18 @@
-# frozen_string_literal: true
-
 module MoneyFilter
+  
  def money_with_currency(money)
    return '' if money.nil?
-    format("$ %.2f USD", money / 100.0)
+    sprintf("$ %.2f USD", money/100.0)
  end

  def money(money)
    return '' if money.nil?
-    format("$ %.2f", money / 100.0)
+    sprintf("$ %.2f", money/100.0)
  end
-
-  private
-
+  
+  private 
+  
  def currency
    ShopDrop.new.currency
-  end
-end
+  end  
+end
--- a/performance/shopify/paginate.rb
+++ b/performance/shopify/paginate.rb
@@ -1,65 +1,66 @@
-# frozen_string_literal: true
-
 class Paginate < Liquid::Block
-  Syntax = /(#{Liquid::QuotedFragment})\s*(by\s*(\d+))?/
-
-  def initialize(tag_name, markup, options)
-    super
+  Syntax     = /(#{Liquid::QuotedFragment})\s*(by\s*(\d+))?/

+  def initialize(tag_name, markup, tokens)
+    @nodelist = []
+    
    if markup =~ Syntax
-      @collection_name = Regexp.last_match(1)
-      @page_size       = if Regexp.last_match(2)
-        Regexp.last_match(3).to_i
+      @collection_name = $1
+      @page_size = if $2
+        $3.to_i
      else
        20
      end
-
+      
      @attributes = { 'window_size' => 3 }
      markup.scan(Liquid::TagAttributes) do |key, value|
        @attributes[key] = value
-      end
+      end        
    else
-      raise SyntaxError, "Syntax Error in tag 'paginate' - Valid syntax: paginate [collection] by number"
+      raise SyntaxError.new("Syntax Error in tag 'paginate' - Valid syntax: paginate [collection] by number")
    end
+  
+    super
  end

-  def render_to_output_buffer(context, output)
+  def render(context)
    @context = context

-    context.stack do
-      current_page = context['current_page'].to_i
+    context.stack do                      
+      current_page  = context['current_page'].to_i

      pagination = {
-        'page_size' => @page_size,
-        'current_page' => 5,
-        'current_offset' => @page_size * 5,
+        'page_size'      => @page_size,
+        'current_page'   => 5,
+        'current_offset' => @page_size * 5
      }
+      
+      context['paginate'] = pagination      
+      
+      collection_size  = context[@collection_name].size      

-      context['paginate'] = pagination
-
-      collection_size = context[@collection_name].size
-
-      raise ArgumentError, "Cannot paginate array '#{@collection_name}'. Not found." if collection_size.nil?
-
-      page_count = (collection_size.to_f / @page_size.to_f).to_f.ceil + 1
+      raise ArgumentError.new("Cannot paginate array '#{@collection_name}'. Not found.") if collection_size.nil?
+    
+      page_count = (collection_size.to_f / @page_size.to_f).to_f.ceil + 1 

      pagination['items']      = collection_size
-      pagination['pages']      = page_count - 1
-      pagination['previous']   = link('&laquo; Previous', current_page - 1)  unless 1 >= current_page
-      pagination['next']       = link('Next &raquo;', current_page + 1)      unless page_count <= current_page + 1
+      pagination['pages']      = page_count -1
+      pagination['previous']   = link('&laquo; Previous', current_page-1 )  unless 1 >= current_page
+      pagination['next']       = link('Next &raquo;', current_page+1 )      unless page_count <= current_page+1
      pagination['parts']      = []
-
+      
      hellip_break = false
-
+      
      if page_count > 2
-        1.upto(page_count - 1) do |page|
+        1.upto(page_count-1) do |page|
+        
          if current_page == page
            pagination['parts'] << no_link(page)
-          elsif page == 1
+          elsif page == 1 
            pagination['parts'] << link(page, page)
-          elsif page == page_count - 1
+          elsif page == page_count -1
            pagination['parts'] << link(page, page)
-          elsif page <= current_page - @attributes['window_size'] || page >= current_page + @attributes['window_size']
+          elsif page <= current_page - @attributes['window_size'] or page >= current_page + @attributes['window_size']
            next if hellip_break
            pagination['parts'] << no_link('&hellip;')
            hellip_break = true
@@ -67,26 +68,26 @@ class Paginate < Liquid::Block
          else
            pagination['parts'] << link(page, page)
          end
-
+        
          hellip_break = false
-        end
+        end 
      end
-
-      super
+      
+      render_all(@nodelist, context)
    end
  end
-
+    
  private
-
+  
  def no_link(title)
-    { 'title' => title, 'is_link' => false }
+    { 'title' => title, 'is_link' => false}
  end
-
+  
  def link(title, page)
-    { 'title' => title, 'url' => current_url + "?page=#{page}", 'is_link' => true }
+    { 'title' => title, 'url' => current_url + "?page=#{page}", 'is_link' => true}
  end
-
+  
  def current_url
    "/collections/frontpage"
  end
-end
+end    
--- a/performance/shopify/shop_filter.rb
+++ b/performance/shopify/shop_filter.rb
@@ -1,6 +1,5 @@
-# frozen_string_literal: true
-
 module ShopFilter
+      
  def asset_url(input)
    "/files/1/[shop_id]/[shop_id]/assets/#{input}"
  end
@@ -8,99 +7,92 @@ module ShopFilter
  def global_asset_url(input)
    "/global/#{input}"
  end
-
+  
  def shopify_asset_url(input)
    "/shopify/#{input}"
  end
-
+  
  def script_tag(url)
    %(<script src="#{url}" type="text/javascript"></script>)
  end

-  def stylesheet_tag(url, media = "all")
+  def stylesheet_tag(url, media="all")
    %(<link href="#{url}" rel="stylesheet" type="text/css"  media="#{media}"  />)
  end
-
-  def link_to(link, url, title = "")
-    %(<a href="#{url}" title="#{title}">#{link}</a>)
+       
+  def link_to(link, url, title="")
+    %|<a href="#{url}" title="#{title}">#{link}</a>|
  end
-
-  def img_tag(url, alt = "")
-    %(<img src="#{url}" alt="#{alt}" />)
-  end
-
+  
+  def img_tag(url, alt="")
+    %|<img src="#{url}" alt="#{alt}" />|  
+  end  
+  
  def link_to_vendor(vendor)
    if vendor
-      link_to(vendor, url_for_vendor(vendor), vendor)
+      link_to vendor, url_for_vendor(vendor), vendor
    else
      'Unknown Vendor'
    end
  end
-
+  
  def link_to_type(type)
    if type
-      link_to(type, url_for_type(type), type)
+      link_to type, url_for_type(type), type
    else
      'Unknown Vendor'
    end
  end
-
+  
  def url_for_vendor(vendor_title)
-    "/collections/#{to_handle(vendor_title)}"
+    "/collections/#{vendor_title.to_handle}"
  end
-
+  
  def url_for_type(type_title)
-    "/collections/#{to_handle(type_title)}"
+    "/collections/#{type_title.to_handle}"
  end
-
+  
  def product_img_url(url, style = 'small')
-    unless url =~ %r{\Aproducts/([\w\-\_]+)\.(\w{2,4})}
+    
+    unless url =~ /^products\/([\w\-\_]+)\.(\w{2,4})/
      raise ArgumentError, 'filter "size" can only be called on product images'
    end
-
+    
    case style
    when 'original'
-      '/files/shops/random_number/' + url
+      return '/files/shops/random_number/' + url 
    when 'grande', 'large', 'medium', 'compact', 'small', 'thumb', 'icon'
-      "/files/shops/random_number/products/#{Regexp.last_match(1)}_#{style}.#{Regexp.last_match(2)}"
+      "/files/shops/random_number/products/#{$1}_#{style}.#{$2}"              
    else
-      raise ArgumentError, 'valid parameters for filter "size" are: original, grande, large, medium, compact, small, thumb and icon '
+      raise ArgumentError, 'valid parameters for filter "size" are: original, grande, large, medium, compact, small, thumb and icon '      
    end
  end
-
+  
  def default_pagination(paginate)
-    html = []
+    
+    html = []    
    html << %(<span class="prev">#{link_to(paginate['previous']['title'], paginate['previous']['url'])}</span>) if paginate['previous']

-    paginate['parts'].each do |part|
-      html << if part['is_link']
-        %(<span class="page">#{link_to(part['title'], part['url'])}</span>)
+    for part in paginate['parts']
+
+      if part['is_link']
+        html << %(<span class="page">#{link_to(part['title'], part['url'])}</span>)        
      elsif part['title'].to_i == paginate['current_page'].to_i
-        %(<span class="page current">#{part['title']}</span>)
+        html << %(<span class="page current">#{part['title']}</span>)        
      else
-        %(<span class="deco">#{part['title']}</span>)
+        html << %(<span class="deco">#{part['title']}</span>)                
      end
+      
    end

    html << %(<span class="next">#{link_to(paginate['next']['title'], paginate['next']['url'])}</span>) if paginate['next']
    html.join(' ')
  end
-
+  
  # Accepts a number, and two words - one for singular, one for plural
  # Returns the singular word if input equals 1, otherwise plural
  def pluralize(input, singular, plural)
    input == 1 ? singular : plural
  end
-
-  private
-
-  def to_handle(str)
-    result = str.dup
-    result.downcase!
-    result.delete!("'\"()[]")
-    result.gsub!(/\W+/, '-')
-    result.gsub!(/-+\z/, '') if result[-1] == '-'
-    result.gsub!(/\A-+/, '') if result[0] == '-'
-    result
-  end
+      
 end
--- a/performance/shopify/tag_filter.rb
+++ b/performance/shopify/tag_filter.rb
@@ -1,11 +1,10 @@
-# frozen_string_literal: true
-
 module TagFilter
-  def link_to_tag(label, tag)
+    
+  def link_to_tag(label, tag)    
    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tag}\">#{label}</a>"
  end
-
-  def highlight_active_tag(tag, css_class = 'active')
+  
+  def highlight_active_tag(tag, css_class='active')
    if @context['current_tags'].include?(tag)
      "<span class=\"#{css_class}\">#{tag}</span>"
    else
@@ -13,13 +12,14 @@ module TagFilter
    end
  end

-  def link_to_add_tag(label, tag)
+  def link_to_add_tag(label, tag)    
    tags = (@context['current_tags'] + [tag]).uniq
-    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join('+')}\">#{label}</a>"
+    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join("+")}\">#{label}</a>"
  end
-
-  def link_to_remove_tag(label, tag)
+  
+  def link_to_remove_tag(label, tag)    
    tags = (@context['current_tags'] - [tag]).uniq
-    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join('+')}\">#{label}</a>"
+    "<a title=\"Show tag #{tag}\" href=\"/collections/#{@context['handle']}/#{tags.join("+")}\">#{label}</a>"
  end
+  
 end
--- a/performance/shopify/vision.database.yml
+++ b/performance/shopify/vision.database.yml
@@ -2,7 +2,7 @@
 #   Variants
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-

-product_variants:
+product_variants: 
  - &product-1-var-1
    id: 1
    title: 151cm / Normal
@@ -13,7 +13,7 @@ product_variants:
    inventory_quantity: 5
    option1: 151cm
    option2: Normal
-    option3:
+    option3: 
  - &product-1-var-2
    id: 2
    title: 155cm / Normal
@@ -24,7 +24,7 @@ product_variants:
    inventory_quantity: 2
    option1: 155cm
    option2: Normal
-    option3:
+    option3: 
  - &product-2-var-1
    id: 3
    title: 162cm
@@ -34,19 +34,19 @@ product_variants:
    available: true
    inventory_quantity: 3
    option1: 162cm
-    option2:
-    option3:
+    option2: 
+    option3: 
  - &product-3-var-1
    id: 4
    title: 159cm
    price: 19900
    weight: 1000
-    compare_at_price:
+    compare_at_price: 
    available: true
    inventory_quantity: 4
    option1: 159cm
-    option2:
-    option3:
+    option2: 
+    option3: 
  - &product-4-var-1
    id: 5
    title: 159cm
@@ -56,8 +56,8 @@ product_variants:
    available: true
    inventory_quantity: 6
    option1: 159cm
-    option2:
-    option3:
+    option2: 
+    option3: 
  - &product-1-var-3
    id: 6
    title: 158cm / Wide
@@ -74,12 +74,12 @@ product_variants:
    title: 162cm
    price: 19900
    weight: 1000
-    compare_at_price:
+    compare_at_price: 
    available: false
    inventory_quantity: 0
    option1: 162cm
-    option2:
-    option3:
+    option2: 
+    option3: 
  - &product-3-var-3
    id: 8
    title: 165cm
@@ -89,8 +89,8 @@ product_variants:
    available: true
    inventory_quantity: 4
    option1: 165cm
-    option2:
-    option3:
+    option2: 
+    option3: 
  - &product-5-var-1
    id: 9
    title: black / 42
@@ -233,7 +233,7 @@ product_variants:
    inventory_quantity: 0
    option1: brown
    option2: medium
-    option3:
+    option3:       
  - &product-8-var-3
    id: 22
    title: brown / large
@@ -315,7 +315,7 @@ product_variants:
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 #   Products
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-
+  
 products:
  - &product-1
    id: 1
@@ -327,27 +327,27 @@ products:
    price_max: 31900
    price_min: 23900
    price_varies: true
-    available: true
-    tags:
+    available: true    
+    tags: 
      - season2005
      - pro
      - intermediate
-      - wooden
+      - wooden      
      - freestyle
-    options:
+    options: 
      - Length
-      - Style
+      - Style           
    compare_at_price: 49900
    compare_at_price_max: 50900
    compare_at_price_min: 49900
    compare_at_price_varies: true
    url: /products/arbor-draft
    featured_image: products/arbor_draft.jpg
-    images:
+    images: 
      - products/arbor_draft.jpg
-    description:
+    description: 
      The Arbor Draft snowboard wouldn't exist if Polynesians hadn't figured out how to surf hundreds of years ago. But the Draft does exist, and it's here to bring your urban and park riding to a new level. The board's freaky Tiki design pays homage to culture that inspired snowboarding. It's designed to spin with ease, land smoothly, lock hook-free onto rails, and take the abuse of a pavement pounding or twelve. The Draft will pop off kickers with authority and carve solidly across the pipe. The Draft features targeted Koa wood die cuts inlayed into the deck that enhance the flex pattern. Now bow down to riding's ancestors.
-    variants:
+    variants: 
      - *product-1-var-1
      - *product-1-var-2
      - *product-1-var-3
@@ -361,14 +361,14 @@ products:
    price_max: 29900
    price_min: 29900
    price_varies: false
-    available: true
-    tags:
+    available: true    
+    tags: 
      - season2005
      - pro
-      - wooden
+      - wooden          
      - freestyle
    options:
-      - Length
+      - Length 
    compare_at_price: 52900
    compare_at_price_max: 52900
    compare_at_price_min: 52900
@@ -379,29 +379,29 @@ products:
      - products/element58.jpg
    description:
      The Element is a technically advanced all-mountain board for riders who readily transition from one terrain, snow condition, or riding style to another. Its balanced design provides the versatility needed for the true ride-it-all experience. The Element is exceedingly lively, freely initiates, and holds a tight edge at speed. Its structural real-wood topsheet is made with book-matched Koa.
-    variants:
+    variants: 
      - *product-2-var-1
-
+    
  - &product-3
    id: 3
-    title: Comic ~ Pastel
+    title: Comic ~ Pastel 
    handle: comic-pastel
    type: Snowboards
    vendor: Technine
    price: 19900
    price_max: 22900
    price_min: 19900
-    tags:
+    tags: 
      - season2006
      - beginner
      - intermediate
-      - freestyle
+      - freestyle      
      - purple
    options:
      - Length
    price_varies: true
-    available: true
-    compare_at_price:
+    available: true    
+    compare_at_price: 
    compare_at_price_max: 0
    compare_at_price_min: 0
    compare_at_price_varies: false
@@ -413,7 +413,7 @@ products:
      - products/technine_detail.jpg
    description:
      2005 Technine Comic Series Description The Comic series was developed to be the ultimate progressive freestyle board in the Technine line. Dependable edge control and a perfect flex pattern for jumping in the park or out of bounds. Landins and progression will come easy with this board and it will help your riding progress to the next level. Street rails, park jibs, backcountry booters and park jumps, this board will do it all.
-    variants:
+    variants: 
      - *product-3-var-1
      - *product-3-var-2
      - *product-3-var-3
@@ -428,12 +428,12 @@ products:
    price_max: 19900
    price_min: 19900
    price_varies: false
-    available: true
-    tags:
+    available: true    
+    tags: 
      - season2006
      - beginner
      - intermediate
-      - freestyle
+      - freestyle   
      - orange
    options:
      - Length
@@ -448,9 +448,9 @@ products:
      - products/technine4.jpg
    description:
      2005 Technine Comic Series Description The Comic series was developed to be the ultimate progressive freestyle board in the Technine line. Dependable edge control and a perfect flex pattern for jumping in the park or out of bounds. Landins and progression will come easy with this board and it will help your riding progress to the next level. Street rails, park jibs, backcountry booters and park jumps, this board will do it all.
-    variants:
+    variants: 
      - *product-4-var-1
-
+      
  - &product-5
    id: 5
    title: Burton Boots
@@ -461,11 +461,11 @@ products:
    price_max: 11900
    price_min: 11900
    price_varies: false
-    available: true
-    tags:
+    available: true        
+    tags: 
      - season2006
      - beginner
-      - intermediate
+      - intermediate   
      - boots
    options:
      - Color
@@ -480,13 +480,13 @@ products:
      - products/burton.jpg
    description:
      The Burton boots are particularly well on snowboards. The very best thing about them is that the according picture is cubic. This makes testing in a Vision testing environment very easy.
-    variants:
+    variants: 
      - *product-5-var-1
      - *product-5-var-2
      - *product-5-var-3
      - *product-5-var-4
      - *product-5-var-5
-      - *product-5-var-6
+      - *product-5-var-6                        

  - &product-6
    id: 6
@@ -498,17 +498,17 @@ products:
    price_max: 2179500
    price_min: 2179500
    price_varies: false
-    available: true
-    tags:
+    available: true    
+    tags: 
      - ducati
      - superbike
-      - bike
+      - bike   
      - street
      - racing
-      - performance
+      - performance      
    options:
      - Color
-    compare_at_price:
+    compare_at_price: 
    compare_at_price_max: 0
    compare_at_price_min: 0
    compare_at_price_varies: false
@@ -520,7 +520,7 @@ products:
      <h3>‘S’ PERFORMANCE</h3>
      <p>Producing 170hp (125kW) and with a dry weight of just 169kg (372.6lb), the new 1198 S now incorporates more World Superbike technology than ever before by taking the 1198 motor and adding top-of-the-range suspension, lightweight chassis components and a true racing-style traction control system designed for road use.</p>
      <p>The high performance, fully adjustable 43mm Öhlins forks, which sport low friction titanium nitride-treated fork sliders, respond effortlessly to every imperfection in the tarmac. Beyond their advanced engineering solutions, one of the most important characteristics of Öhlins forks is their ability to communicate the condition and quality of the tyre-to-road contact patch, a feature that puts every rider in superior control. The suspension set-up at the rear is complemented with a fully adjustable Öhlins rear shock equipped with a ride enhancing top-out spring and mounted to a single-sided swingarm for outstanding drive and traction. The front-to-rear Öhlins package is completed with a control-enhancing adjustable steering damper.</p>
-    variants:
+    variants: 
      - *product-6-var-1

  - &product-7
@@ -533,17 +533,17 @@ products:
    price_max: 1900
    price_min: 1900
    price_varies: false
-    available: true
-    tags:
+    available: true    
+    tags: 
      - shopify
      - shirt
-      - apparel
+      - apparel  
      - tshirt
      - clothing
    options:
      - Color
      - Size
-    compare_at_price:
+    compare_at_price: 
    compare_at_price_max: 0
    compare_at_price_min: 0
    compare_at_price_varies: false
@@ -554,11 +554,11 @@ products:
    description:
      <p>High Quality Shopify Shirt. Wear your e-commerce solution with pride and attract attention anywhere you go.</p>
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
-    variants:
+    variants: 
      - *product-7-var-1
      - *product-7-var-2
      - *product-7-var-3
-      - *product-7-var-4
+      - *product-7-var-4            

  - &product-8
    id: 8
@@ -570,11 +570,11 @@ products:
    price_max: 5900
    price_min: 5900
    price_varies: false
-    available: true
-    tags:
+    available: true    
+    tags: 
      - sweater
      - hooded
-      - apparel
+      - apparel  
      - clothing
    options:
      - Color
@@ -591,11 +591,11 @@ products:
    description:
      <p>Extra comfortable zip up sweater. Durable quality, ideal for any outdoor activities.</p>
      <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
-    variants:
+    variants: 
      - *product-8-var-1
      - *product-8-var-2
      - *product-8-var-3
-      - *product-8-var-4
+      - *product-8-var-4            
      - *product-8-var-5
      - *product-8-var-6

@@ -609,11 +609,11 @@ products:
    price_max: 552500
    price_min: 499995
    price_varies: true
-    available: true
-    tags:
+    available: true    
+    tags: 
      - camera
      - slr
-      - nikon
+      - nikon  
      - professional
    options:
      - Bundle
@@ -626,21 +626,21 @@ products:
    images:
      - products/d3.jpg
      - products/d3_2.jpg
-      - products/d3_3.jpg
+      - products/d3_3.jpg      
    description:
      <p>Flagship pro D-SLR with a 12.1-MP FX-format CMOS sensor, blazing 9 fps shooting at full FX resolution and low-noise performance up to 6400 ISO.</p>
      <p><strong>Nikon's original 12.1-megapixel FX-format (23.9 x 36mm) CMOS sensor:</strong> Couple Nikon's exclusive digital image processing system with the 12.1-megapixel FX-format and you'll get breathtakingly rich images while also reducing noise to unprecedented levels with even higher ISOs.</p>
      <p><strong>Continuous shooting at up to 9 frames per second:</strong> At full FX resolution and up to 11fps in the DX crop mode, the D3 offers uncompromised shooting speeds for fast-action and sports photography.</p>
-    variants:
+    variants: 
      - *product-9-var-1
      - *product-9-var-2
      - *product-9-var-3

-
+      
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 #   Line Items
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-
+      
 line_items:
  - &line_item-1
    id: 1
@@ -661,7 +661,7 @@ line_items:
    quantity: 2
    variant: *product-4-var-1
    product: *product-4
-
+    
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 #   Link Lists
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
@@ -715,7 +715,7 @@ links:
    title: Catalog
    url: /collections/all

-
+    

 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 #   Link Lists
@@ -727,7 +727,7 @@ link_lists:
    title: 'Main Menu'
    handle: 'main-menu'
    links:
-      - *link-12
+      - *link-12      
      - *link-5
      - *link-7
      - *link-8
@@ -738,7 +738,7 @@ link_lists:
    links:
      - *link-5
      - *link-6
-
+      
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 #   Collections
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
@@ -759,7 +759,7 @@ collections:
    title: Arbor
    handle: arbor
    url: /collections/arbor
-    products:
+    products: 
      - *product-1
      - *product-2

@@ -770,26 +770,26 @@ collections:
    url: /collections/snowboards
    description:
      <p>This is a description for my <strong>Snowboards</strong> collection.</p>
-    products:
+    products: 
      - *product-1
      - *product-2
      - *product-3
      - *product-4
-
+  
  - &collection-4
    id: 4
    title: Items On Sale
    handle: sale
    url: /collections/sale
-    products:
+    products: 
      - *product-1
-
+      
  - &collection-5
    id: 5
    title: Paginated Sale
    handle: 'paginated-sale'
    url: '/collections/paginated-sale'
-    products:
+    products: 
      - *product-1
      - *product-2
      - *product-3
@@ -801,7 +801,7 @@ collections:
    title: All products
    handle: 'all'
    url: '/collections/all'
-    products:
+    products: 
      - *product-7
      - *product-8
      - *product-9
@@ -812,7 +812,7 @@ collections:
      - *product-4
      - *product-5

-
+          
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 #   Pages and Blogs
 # =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
@@ -828,12 +828,12 @@ pages:
      <p>Our retail store is located at <em>Rue d'Avignon 32, Avignon (Provence)</em>.</p>
      <p><strong>Opening Hours:</strong><br />Monday through Friday: 9am - 6pm<br />Saturday: 10am - 3pm<br />Sunday: closed</p>"
    created_at: 2005-04-04 12:00
-
+    
  - &page-3
    id: 2
    title: About Us
    handle: about-us
-    url: /pages/about-us
+    url: /pages/about-us   
    author: Tobi
    content:
      "<p>Our company was founded in 1894 and we are since operating out of Avignon from the beautiful Provence.</p>
@@ -848,12 +848,12 @@ pages:
    author: Tobi
    content: "<ul><li>Your order is safe with us. Our checkout uses industry standard security to protect your information.</li><li>Your order will be billed immediately upon checkout.</li><li><b>ALL SALES ARE FINAL:</b> Defective or damaged product will be exchanged</li><li>All orders are processed expediently: usually in under 24 hours.</li></ul>"
    created_at: 2005-04-04 12:00
-
+    
  - &page-5
    id: 4
    title: Shipping and Handling
    handle: shipping
-    url: /pages/shipping
+    url: /pages/shipping    
    author: Tobi
    content: <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    created_at: 2005-04-04 12:00
@@ -862,7 +862,7 @@ pages:
    id: 5
    title: Frontpage
    handle: frontpage
-    url: /pages/frontpage
+    url: /pages/frontpage    
    author: Tobi
    content: <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
    created_at: 2005-04-04 12:00
@@ -872,11 +872,11 @@ blogs:
    handle: news
    title: News
    url: /blogs/news
-    articles:
+    articles: 
      - id: 3
        title: 'Welcome to the new Foo Shop'
        author: Daniel
-        content: <p><strong>Welcome to your Shopify store! The jaded Pixel crew is really glad you decided to take Shopify for a spin.</strong></p><p>To help you get you started with Shopify, here are a couple of tips regarding what you see on this page.</p><p>The text you see here is an article. To edit this article, create new articles or create new pages you can go to the <a href="/admin/pages">Blogs &amp; Pages</a> tab of the administration menu.</p><p>The Shopify t-shirt above is a product and selling products is what Shopify is all about. To edit this product, or create new products you can go to the <a href="/admin/products">Products Tab</a> in of the administration menu.</p><p>While you're looking around be sure to check out the <a href="/admin/collections">Collections</a> and <a href="/admin/links">Navigations</a> tabs and soon you will be well on your way to populating your site.</p><p>And of course don't forget to browse the <a href="admin/design/appearance/themes">theme gallery</a> to pick a new look for your shop!</p><p><strong>Shopify is in beta</strong><br />If you would like to make comments or suggestions please visit us in the <a href="http://forums.shopify.com/community">Shopify Forums</a> or drop us an <a href="mailto:feedback@shopify.com">email</a>.</p>
+        content: <p><strong>Welcome to your Shopify store! The jaded Pixel crew is really glad you decided to take Shopify for a spin.</strong></p><p>To help you get you started with Shopify, here are a couple of tips regarding what you see on this page.</p><p>The text you see here is an article. To edit this article, create new articles or create new pages you can go to the <a href="/admin/pages">Blogs &amp; Pages</a> tab of the administration menu.</p><p>The Shopify t-shirt above is a product and selling products is what Shopify is all about. To edit this product, or create new products you can go to the <a href="/admin/products">Products Tab</a> in of the administration menu.</p><p>While you're looking around be sure to check out the <a href="/admin/collections">Collections</a> and <a href="/admin/links">Navigations</a> tabs and soon you will be well on your way to populating your site.</p><p>And of course don't forget to browse the <a href="admin/design/appearance/themes">theme gallery</a> to pick a new look for your shop!</p><p><strong>Shopify is in beta</strong><br />If you would like to make comments or suggestions please visit us in the <a href="http://forums.shopify.com/community">Shopify Forums</a> or drop us an <a href="mailto:feedback@shopify.com">email</a>.</p>  
        created_at: 2005-04-04 16:00
      - id: 4
        title: 'Breaking News: Restock on all sales products'
@@ -884,7 +884,7 @@ blogs:
        content: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
        created_at: 2005-04-04 12:00
    articles_count: 2
-
+         
  - id: 2
    handle: bigcheese-blog
    title: Bigcheese blog
@@ -896,7 +896,7 @@ blogs:
        content: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
        created_at: 2005-04-04 16:00
        comments:
-          -
+          - 
            id: 1
            author: John Smith
            email: john@smith.com
@@ -905,7 +905,7 @@ blogs:
            created_at: 2009-01-01 12:00
            updated_at: 2009-02-01 12:00
            url: ""
-          -
+          - 
            id: 2
            author: John Jones
            email: john@jones.com
@@ -921,22 +921,22 @@ blogs:
        created_at: 2005-04-06 12:00
        comments:
    articles_count: 2
-    comments_enabled?: true
+    comments_enabled?: true 
    comment_post_url: ""
    comments_count: 2
-    moderated?: true
+    moderated?: true 

  - id: 3
    handle: paginated-blog
    title: Paginated blog
    url: /blogs/paginated-blog
-    articles:
+    articles: 
      - id: 6
        title: 'One thing you probably did not know yet...'
        author: Justin
        content: Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
        created_at: 2005-04-04 16:00
-
+    
      - id: 7
        title: Fascinating
        author: Tobi
--- a/performance/shopify/weight_filter.rb
+++ b/performance/shopify/weight_filter.rb
@@ -1,11 +1,11 @@
-# frozen_string_literal: true
-
 module WeightFilter
-  def weight(grams)
-    format("%.2f", grams / 1000)
-  end

+  def weight(grams)
+    sprintf("%.2f", grams / 1000)
+  end
+  
  def weight_with_unit(grams)
    "#{weight(grams)} kg"
-  end
-end
+  end  
+  
+end
--- a/performance/tests/dropify/article.liquid
+++ b/performance/tests/dropify/article.liquid
@@ -4,7 +4,7 @@

  <div class="article-body textile">
    {{ article.content }}
-  </div>
+  </div>    

 </div>

@@ -12,27 +12,27 @@
 {% if blog.comments_enabled? %}
 <div id="comments">
  <h3>Comments</h3>
-
+  
  <!-- List all comments -->
  <ul id="comment-list">
  {% for comment in article.comments %}
    <li>
-      <div class="comment-details">
-        <span class="comment-author">{{ comment.author }}</span> said on <span class="comment-date">{{ comment.created_at | date: "%B %d, %Y" }}</span>:
+  	  <div class="comment-details">
+  		  <span class="comment-author">{{ comment.author }}</span> said on <span class="comment-date">{{ comment.created_at | date: "%B %d, %Y" }}</span>:
      </div>

      <div class="comment">
        {{ comment.content }}
-      </div>
-    </li>
+      </div>      
+  	</li>
  {% endfor %}
  </ul>
-
+  
  <!-- Comment Form -->
  <div id="comment-form">
  {% form article %}
    <h3>Leave a comment</h3>
-
+    
    <!-- Check if a comment has been submitted in the last request, and if yes display an appropriate message -->
    {% if form.posted_successfully? %}
      {% if blog.moderated? %}
@@ -44,11 +44,11 @@
        <div class="notice">Successfully posted your comment.</div>
      {% endif %}
    {% endif %}
-
+    
    {% if form.errors %}
      <div class="notice error">Not all the fields have been filled out correctly!</div>
    {% endif %}
-
+    
    <dl>
      <dt class="{% if form.errors contains 'author' %}error{% endif %}"><label for="comment_author">Your name</label></dt>
      <dd><input type="text" id="comment_author" name="comment[author]" size="40" value="{{form.author}}" class="{% if form.errors contains 'author' %}input-error{% endif %}" /></dd>
@@ -59,16 +59,16 @@
      <dt class="{% if form.errors contains 'body' %}error{% endif %}"><label for="comment_body">Your comment</label></dt>
      <dd><textarea id="comment_body" name="comment[body]" cols="40" rows="5" class="{% if form.errors contains 'body' %}input-error{% endif %}">{{form.body}}</textarea></dd>
    </dl>
-
+    
    {% if blog.moderated? %}
      <p class="hint">comments have to be approved before showing up</p>
-    {% endif %}
+    {% endif %}    

    <input type="submit" value="Post comment" id="comment-submit" />
  {% endform %}
  </div>
  <!-- END Comment Form -->
-
+  
 </div>
 {% endif %}
-<!-- END Comments -->
+<!-- END Comments -->
--- a/performance/tests/dropify/blog.liquid
+++ b/performance/tests/dropify/blog.liquid
@@ -1,33 +1,33 @@
-<div id="page">
-  <h2>{{page.title}}</h2>
-
-  {% paginate blog.articles by 20 %}
-
-    {% for article in blog.articles  %}
-
-    <div class="article">
-      <div class="headline">
-      <h3 class="title">
-        <a href="{{article.url}}">{{ article.title }}</a>
-      </h3>
-      <h4 class="date">Posted on {{ article.created_at | date: "%B %d, '%y" }} by {{ article.author }}.</h4>
-      </div>
-
-      <div class="article-body textile">
-        {{ article.content | strip_html | truncate: 250 }}
-      </div>
-
-      {% if blog.comments_enabled? %}
-        <p style="text-align: right"><a href="{{article.url}}#comments">{{ article.comments_count }} comments</a></p>
-      {% endif %}
-    </div>
-
-    {% endfor %}
-
-    <div id="pagination">
-      {{ paginate | default_pagination }}
-    </div>
-
-  {% endpaginate %}
-
-</div>
+<div id="page">
+  <h2>{{page.title}}</h2>
+
+  {% paginate blog.articles by 20 %}
+
+    {% for article in blog.articles  %}
+
+    <div class="article">
+      <div class="headline">
+      <h3 class="title">
+        <a href="{{article.url}}">{{ article.title }}</a>
+      </h3>
+  		<h4 class="date">Posted on {{ article.created_at | date: "%B %d, '%y" }} by {{ article.author }}.</h4>
+      </div>
+    
+      <div class="article-body textile">
+        {{ article.content | strip_html | truncate: 250 }}
+      </div>
+      
+      {% if blog.comments_enabled? %}
+        <p style="text-align: right"><a href="{{article.url}}#comments">{{ article.comments_count }} comments</a></p>
+      {% endif %}    
+    </div>
+  
+    {% endfor %}
+    
+    <div id="pagination">
+      {{ paginate | default_pagination }}
+    </div>
+
+  {% endpaginate %}
+  
+</div>
--- a/performance/tests/dropify/cart.liquid
+++ b/performance/tests/dropify/cart.liquid
@@ -1,66 +1,66 @@
-<script type="text/javascript">
-  function remove_item(id) {
-      document.getElementById('updates_'+id).value = 0;
-      document.getElementById('cartform').submit();
-  }
-</script>
-
-<div>
-
-  {% if cart.item_count == 0 %}
-    <h4>Your shopping cart is looking rather empty...</h4>
-  {% else %}
-  <form action="/cart" method="post" id="cartform">
-
-  <div id="cart">
-
-  <h3>You have {{ cart.item_count }} {{ cart.item_count | pluralize: 'product', 'products' }} in here!</h3>
-
-    <ul id="line-items">
-      {% for item in cart.items %}
-      <li id="item-{{item.id}}" class="clearfix">
-        <div class="thumb">
-          <div class="prodimage">
-          <a href="{{item.product.url}}" title="View {{item.title}} Page"><img src="{{item.product.featured_image | product_img_url: 'thumb' }}" alt="{{item.title | escape }}" /></a>
-        </div></div>
-        <h3 style="padding-right: 150px">
-      <a href="{{item.product.url}}" title="View {{item.title | escape }} Page">
-        {{ item.title }}
-        {% if item.variant.available == true %}
-           ({{item.variant.title}})
-        {% endif %}
-      </a>
-    </h3>
-        <small class="itemcost">Costs {{ item.price | money }} each, <span class="money">{{item.line_price | money }}</span> total.</small>
-        <p class="right">
-          <label for="updates">How many? </label>
-          <input type="text" size="4" name="updates[{{item.variant.id}}]" id="updates_{{item.variant.id}}" value="{{item.quantity}}" onfocus="this.select();"/><br />
-          <a href="#" onclick="remove_item({{item.variant.id}}); return false;" class="remove"><img style="padding:15px 0 0 0;margin:0;" src="{{ 'delete.gif' | asset_url }}" /></a>
-        </p>
-      </li>
-      {% endfor %}
-      <li id="total">
-        <input type="image" id="update-cart" name="update" value="Update My Cart" src="{{ 'update.gif' | asset_url }}" />
-        Subtotal:
-        <span class="money">{{ cart.total_price | money_with_currency }}</span>
-      </li>
-    </ul>
-
-  </div>
-
-    <div class="info">
-    <input type="image" value="Checkout!" name="checkout" src="{{ 'checkout.gif' | asset_url }}" />
-    </div>
-
-    {% if additional_checkout_buttons %}
-    <div class="additional-checkout-buttons">
-      <p>- or -</p>
-      {{ content_for_additional_checkout_buttons }}
-    </div>
-    {% endif %}
-
-  </form>
-
-  {% endif %}
-
-</div>
+<script type="text/javascript">
+  function remove_item(id) {
+      document.getElementById('updates_'+id).value = 0;
+      document.getElementById('cartform').submit();
+  }
+</script>
+
+<div>
+
+  {% if cart.item_count == 0 %} 
+    <h4>Your shopping cart is looking rather empty...</h4>
+  {% else %}
+  <form action="/cart" method="post" id="cartform">
+
+  <div id="cart">
+  
+  <h3>You have {{ cart.item_count }} {{ cart.item_count | pluralize: 'product', 'products' }} in here!</h3>
+
+    <ul id="line-items">
+      {% for item in cart.items %}
+      <li id="item-{{item.id}}" class="clearfix">
+        <div class="thumb">
+				  <div class="prodimage">
+          <a href="{{item.product.url}}" title="View {{item.title}} Page"><img src="{{item.product.featured_image | product_img_url: 'thumb' }}" alt="{{item.title | escape }}" /></a>
+        </div></div>
+        <h3 style="padding-right: 150px">
+			<a href="{{item.product.url}}" title="View {{item.title | escape }} Page">
+				{{ item.title }}
+				{% if item.variant.available == true %}
+				   ({{item.variant.title}})
+				{% endif %}
+			</a>	
+		</h3>
+        <small class="itemcost">Costs {{ item.price | money }} each, <span class="money">{{item.line_price | money }}</span> total.</small>
+        <p class="right">
+          <label for="updates">How many? </label> 
+          <input type="text" size="4" name="updates[{{item.variant.id}}]" id="updates_{{item.variant.id}}" value="{{item.quantity}}" onfocus="this.select();"/><br />
+          <a href="#" onclick="remove_item({{item.variant.id}}); return false;" class="remove"><img style="padding:15px 0 0 0;margin:0;" src="{{ 'delete.gif' | asset_url }}" /></a>
+        </p>
+      </li>
+      {% endfor %}
+      <li id="total">
+        <input type="image" id="update-cart" name="update" value="Update My Cart" src="{{ 'update.gif' | asset_url }}" />
+        Subtotal: 
+        <span class="money">{{ cart.total_price | money_with_currency }}</span>
+      </li>
+    </ul>
+
+  </div>
+  
+    <div class="info">
+		<input type="image" value="Checkout!" name="checkout" src="{{ 'checkout.gif' | asset_url }}" />
+    </div>
+  
+  	{% if additional_checkout_buttons %}
+    <div class="additional-checkout-buttons">
+      <p>- or -</p>
+      {{ content_for_additional_checkout_buttons }}
+    </div>
+    {% endif %}
+  
+  </form>
+
+  {% endif %}
+
+</div>
--- a/performance/tests/dropify/collection.liquid
+++ b/performance/tests/dropify/collection.liquid
@@ -1,22 +1,22 @@
-{% paginate collection.products by 20 %}
-
-<ul id="product-collection">
-    {% for product in collection.products %}
-    <li class="singleproduct clearfix">
-      <div class="small">
-        <div class="prodimage"><a href="{{product.url}}"><img src="{{ product.featured_image | product_img_url: 'small' }}" /></a></div>
-      </div>
-      <div class="description">
-        <h3><a href="{{product.url}}">{{product.title}}</a></h3>
-        <p>{{ product.description | strip_html | truncatewords: 35 }}</p>
-      <p class="money">{{ product.price_min | money }}{% if product.price_varies %} - {{ product.price_max | money }}{% endif %}</p>
-     </div>
-    </li>
-    {% endfor %}
-</ul>
-
-<div id="pagination">
-  {{ paginate | default_pagination }}
-</div>
-
-{% endpaginate %}
+{% paginate collection.products by 20 %}
+
+<ul id="product-collection">
+    {% for product in collection.products %}
+    <li class="singleproduct clearfix">
+      <div class="small">
+        <div class="prodimage"><a href="{{product.url}}"><img src="{{ product.featured_image | product_img_url: 'small' }}" /></a></div>
+      </div>
+      <div class="description">
+        <h3><a href="{{product.url}}">{{product.title}}</a></h3>
+        <p>{{ product.description | strip_html | truncatewords: 35 }}</p>
+  	  <p class="money">{{ product.price_min | money }}{% if product.price_varies %} - {{ product.price_max | money }}{% endif %}</p>
+     </div>
+    </li>
+    {% endfor %}
+</ul>
+  
+<div id="pagination">
+  {{ paginate | default_pagination }}
+</div>
+
+{% endpaginate %}
--- a/performance/tests/dropify/index.liquid
+++ b/performance/tests/dropify/index.liquid
@@ -1,47 +1,47 @@
-<div id="frontproducts"><div id="frontproducts-top"><div id="frontproducts-bottom">
-<h2 style="display: none;">Featured Items</h2>
-{% for product in collections.frontpage.products limit:1 offset:0 %}
-  <div class="productmain">
-   <a href="{{ product.url }}"><img src="{{ product.featured_image | product_img_url: 'small' }}" alt="{{ product.title | escape }}" /></a>
-   <h3><a href="{{ product.url }}">{{ product.title }}</a></h3>
-   <div class="description">{{ product.description | strip_html | truncatewords: 18 }}</div>
-  <p class="money">{{ product.price_min | money }}</p>
-  </div>
-{% endfor %}
-{% for product in collections.frontpage.products offset:1 %}
-  <div class="product">
-   <a href="{{ product.url }}"><img src="{{ product.featured_image | product_img_url: 'thumb' }}" alt="{{ product.title | escape }}" /></a>
-   <h3><a href="{{ product.url }}">{{ product.title }}</a></h3>
-     <p class="money">{{ product.price_min | money }}</p>
-  </div>
-{% endfor %}
-</div></div></div>
-
-<div id="mainarticle">
-  {% assign article = pages.frontpage %}
-
-  {% if article.content != "" %}
-    <h2>{{ article.title }}</h2>
-    <div class="article-body textile">
-      {{ article.content }}
-    </div>
-  {% else %}
-    <div class="article-body textile">
-    In <em>Admin &gt; Blogs &amp; Pages</em>, create a page with the handle <strong><code>frontpage</code></strong> and it will show up here.<br />
-    {{ "Learn more about handles" | link_to: "http://wiki.shopify.com/Handle" }}
-    </div>
-  {% endif %}
-
-</div>
-<br style="clear: both;" />
-<div id="articles">
-  {% for article in blogs.news.articles offset:1  %}
-    <div class="article">
-    <h2>{{ article.title }}</h2>
-    <div class="article-body textile">
-      {{ article.content }}
-    </div>
-  </div>
-  {% endfor %}
-</div>
-
+<div id="frontproducts"><div id="frontproducts-top"><div id="frontproducts-bottom">
+<h2 style="display: none;">Featured Items</h2>
+{% for product in collections.frontpage.products limit:1 offset:0 %}
+  <div class="productmain">
+   <a href="{{ product.url }}"><img src="{{ product.featured_image | product_img_url: 'small' }}" alt="{{ product.title | escape }}" /></a>
+   <h3><a href="{{ product.url }}">{{ product.title }}</a></h3>
+   <div class="description">{{ product.description | strip_html | truncatewords: 18 }}</div>
+	<p class="money">{{ product.price_min | money }}</p>
+  </div>
+{% endfor %}
+{% for product in collections.frontpage.products offset:1 %}
+  <div class="product">
+   <a href="{{ product.url }}"><img src="{{ product.featured_image | product_img_url: 'thumb' }}" alt="{{ product.title | escape }}" /></a>
+   <h3><a href="{{ product.url }}">{{ product.title }}</a></h3>
+     <p class="money">{{ product.price_min | money }}</p>
+  </div>
+{% endfor %}
+</div></div></div>
+
+<div id="mainarticle">
+	{% assign article = pages.frontpage %}
+
+  {% if article.content != "" %}
+	  <h2>{{ article.title }}</h2>
+    <div class="article-body textile">
+		  {{ article.content }}
+		</div>
+	{% else %}
+    <div class="article-body textile">
+	  In <em>Admin &gt; Blogs &amp; Pages</em>, create a page with the handle <strong><code>frontpage</code></strong> and it will show up here.<br />
+	  {{ "Learn more about handles" | link_to "http://wiki.shopify.com/Handle" }}
+    </div>
+	{% endif %}
+  
+</div>
+<br style="clear: both;" />
+<div id="articles">
+  {% for article in blogs.news.articles offset:1  %}
+    <div class="article">
+		<h2>{{ article.title }}</h2>
+		<div class="article-body textile">
+		  {{ article.content }}
+		</div>    
+	</div>
+  {% endfor %}
+</div>
+
--- a/Show More
+++ b/Show More