Fix rebase issues

lib/liquid/condition.rb

@@ -49,6 +49,14 @@ module Liquid
       @@method_literals[markup] || parse_context.parse_expression(markup)
     end
 
+    def self.strict_parse_expression(parse_context, p)
+      if p.look(:id) && !p.look(:dot, 1) && !p.look(:open_square, 1)
+        parse_expression(parse_context, p.consume)
+      else
+        p.expression
+      end
+    end
+
     attr_reader :attachment, :child_condition
     attr_accessor :left, :operator, :right
 

lib/liquid/expression.rb

@@ -33,7 +33,7 @@ module Liquid
         if LITERALS.key?(markup)
           LITERALS[markup]
         else
-          VariableLookup.parse(markup)
+          VariableLookup.lax_parse(markup)
         end
       end
     end

lib/liquid/parser.rb

@@ -50,53 +50,52 @@ module Liquid
       token = @tokens[@p]
       case token[0]
       when :id
-        str = consume
-        str << variable_lookups
+        if Expression::LITERALS.key?(token[1]) && !look(:dot, 1) && !look(:open_square, 1)
+          Expression::LITERALS[consume]
+        else
+          VariableLookup.strict_parse(self)
+        end
       when :open_square
-        str = consume
-        str << expression
-        str << consume(:close_square)
-        str << variable_lookups
-      when :string, :number
-        consume
+        VariableLookup.strict_parse(self)
+      when :string
+        consume[1..-2]
+      when :number
+        num_str = consume
+        num_str.include?('.') ? num_str.to_f : num_str.to_i
       when :open_round
         consume
         first = expression
         consume(:dotdot)
         last = expression
         consume(:close_round)
-        "(#{first}..#{last})"
+        RangeLookup.build(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
+    def arguments
+      filter_args = []
+      keyword_args = nil
 
-      str << expression
-      str
-    end
-
-    def variable_lookups
-      str = +""
       loop do
-        if look(:open_square)
-          str << consume
-          str << expression
-          str << consume(:close_square)
-        elsif look(:dot)
-          str << consume
-          str << consume(:id)
+        # keyword argument (identifier: expression)
+        if look(:colon, 1)
+          keyword_args ||= {}
+          k = consume(:id)
+          consume
+          v = expression
+          keyword_args[k] = v
         else
-          break
+          filter_args << expression
         end
+
+        break unless consume?(:comma)
       end
-      str
+
+      result = [filter_args]
+      result << keyword_args if keyword_args
+      result
     end
   end
 end

lib/liquid/range_lookup.rb

@@ -5,35 +5,43 @@ module Liquid
     def self.parse(start_markup, end_markup)
       start_obj = Expression.parse(start_markup)
       end_obj   = Expression.parse(end_markup)
+      build(start_obj, end_obj)
+    end
+
+    def self.build(start_obj, end_obj)
       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
+        to_integer(start_obj)..to_integer(end_obj)
       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)
+    def self.to_integer(input)
       case input
       when Integer
         input
-      when NilClass, String
+      when NilClass, String, Float
         input.to_i
       else
         Utils.to_integer(input)
       end
     end
+
+    attr_reader :start_expr, :end_expr
+
+    def initialize(start_expr, end_expr)
+      @start_expr = start_expr
+      @end_expr   = end_expr
+    end
+
+    def evaluate(context)
+      start_int = self.class.to_integer(context.evaluate(@start_expr))
+      end_int   = self.class.to_integer(context.evaluate(@end_expr))
+      start_int..end_int
+    end
+
+    def ==(other)
+      self.class == other.class && start_expr == other.start_expr && end_expr == other.end_expr
+    end
   end
 end

lib/liquid/tags/for.rb

@@ -113,10 +113,9 @@ module Liquid
       @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 = parse_expression(collection_name)
+      @collection_name = p.expression
 
-      @name     = "#{@variable_name}-#{collection_name}"
+      @name     = "#{@variable_name}-#{@collection_name}"
       @reversed = p.id?('reversed')
 
       while p.look(:id) && p.look(:colon, 1)
@@ -124,7 +123,18 @@ module Liquid
           raise SyntaxError, options[:locale].t("errors.syntax.for_invalid_attribute")
         end
         p.consume
-        set_attribute(attribute, p.expression)
+        case attribute
+        when 'offset'
+          @from =
+            if p.id?('continue')
+              Usage.increment('for_offset_continue')
+              :continue
+            else
+              p.expression
+            end
+        when 'limit'
+          @limit = p.expression
+        end
       end
       p.consume(:end_of_string)
     end

lib/liquid/tags/if.rb

@@ -75,6 +75,10 @@ module Liquid
       Condition.parse_expression(parse_context, markup)
     end
 
+    def strict_parse_expression(p)
+      Condition.strict_parse_expression(parse_context, p)
+    end
+
     def lax_parse(markup)
       expressions = markup.scan(ExpressionsAndOperators)
       raise SyntaxError, options[:locale].t("errors.syntax.if") unless expressions.pop =~ Syntax
@@ -114,9 +118,9 @@ module Liquid
     end
 
     def parse_comparison(p)
-      a = parse_expression(p.expression)
+      a = strict_parse_expression(p)
       if (op = p.consume?(:comparison))
-        b = parse_expression(p.expression)
+        b = strict_parse_expression(p)
         Condition.new(a, op, b)
       else
         Condition.new(a)

lib/liquid/variable.rb

@@ -65,23 +65,15 @@ module Liquid
 
       return if p.look(:end_of_string)
 
-      @name = Expression.parse(p.expression)
+      @name = p.expression
       while p.consume?(:pipe)
         filtername = p.consume(:id)
-        filterargs = p.consume?(:colon) ? parse_filterargs(p) : []
-        @filters << parse_filter_expressions(filtername, filterargs)
+        filterargs = p.consume?(:colon) ? p.arguments : [[]]
+        @filters << [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 = context.evaluate(@name)
 

lib/liquid/variable_lookup.rb

@@ -7,30 +7,66 @@ module Liquid
 
     attr_reader :name, :lookups
 
-    def self.parse(markup)
-      new(markup)
+    class << self
+      def lax_parse(markup)
+        lookups = markup.scan(VariableParser)
+
+        name = lookups.shift
+        if name =~ SQUARE_BRACKETED
+          name = Expression.parse(Regexp.last_match(1))
+        end
+
+        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
+
+        new(name, lookups, command_flags)
+      end
+
+      def strict_parse(p)
+        if p.look(:id)
+          name = p.consume
+        else
+          p.consume(:open_square)
+          name = p.expression
+          p.consume(:close_square)
+        end
+
+        lookups = []
+        command_flags = 0
+
+        loop do
+          if p.consume?(:open_square)
+            lookups << p.expression
+            p.consume(:close_square)
+          elsif p.consume?(:dot)
+            lookup = p.consume(:id)
+            lookups << lookup
+            if COMMAND_METHODS.include?(lookup)
+              command_flags |= 1 << (lookups.length - 1)
+            end
+          else
+            break
+          end
+        end
+
+        new(name, lookups, command_flags)
+      end
+
+      private :new
     end
 
-    def initialize(markup)
-      lookups = markup.scan(VariableParser)
-
-      name = lookups.shift
-      if name =~ SQUARE_BRACKETED
-        name = Expression.parse(Regexp.last_match(1))
-      end
+    def initialize(name, lookups, command_flags)
       @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
+      @lookups = lookups
+      @command_flags = command_flags
     end
 
     def evaluate(context)
@@ -75,6 +111,19 @@ module Liquid
       self.class == other.class && state == other.state
     end
 
+    def to_s
+      str = name.dup
+      lookups.each do |lookup|
+        str +=
+          if lookup.instance_of?(String)
+            "['#{lookup}']"
+          else
+            "[#{lookup}]"
+          end
+      end
+      str
+    end
+
     protected
 
     def state

test/integration/expression_test.rb

@@ -29,17 +29,24 @@ class ExpressionTest < Minitest::Test
   def test_range
     assert_equal(1..2, parse_and_eval("(1..2)"))
     assert_equal(3..4, parse_and_eval(" ( 3 .. 4 ) "))
+    assert_equal(0..0, parse_and_eval("('a'..'b')"))
+
+    with_error_mode(:strict) do
+      assert_raises(Liquid::ArgumentError) { parse_and_eval("(1..(1..5))") }
+    end
   end
 
   private
 
   def parse_and_eval(markup, **assigns)
-    if Liquid::Template.error_mode == :strict
-      p = Liquid::Parser.new(markup)
-      markup = p.expression
-      p.consume(:end_of_string)
-    end
-    expression = Liquid::Expression.parse(markup)
+    expression =
+      if Liquid::Template.error_mode == :strict
+        p = Liquid::Parser.new(markup)
+        p.expression
+      else
+        Liquid::Expression.parse(markup)
+      end
+
     context = Liquid::Context.new(assigns)
     context.evaluate(expression)
   end

test/unit/condition_unit_test.rb

@@ -77,7 +77,7 @@ class ConditionUnitTest < Minitest::Test
   def test_contains_works_on_arrays
     @context          = Liquid::Context.new
     @context['array'] = [1, 2, 3, 4, 5]
-    array_expr        = VariableLookup.new("array")
+    array_expr        = parse_variable_lookup("array")
 
     assert_evaluates_false(array_expr, 'contains', 0)
     assert_evaluates_true(array_expr, 'contains', 1)
@@ -91,8 +91,8 @@ class ConditionUnitTest < Minitest::Test
 
   def test_contains_returns_false_for_nil_operands
     @context = Liquid::Context.new
-    assert_evaluates_false(VariableLookup.new('not_assigned'), 'contains', '0')
-    assert_evaluates_false(0, 'contains', VariableLookup.new('not_assigned'))
+    assert_evaluates_false(parse_variable_lookup('not_assigned'), 'contains', '0')
+    assert_evaluates_false(0, 'contains', parse_variable_lookup('not_assigned'))
   end
 
   def test_contains_return_false_on_wrong_data_type
@@ -145,11 +145,20 @@ class ConditionUnitTest < Minitest::Test
     @context        = Liquid::Context.new
     @context['one'] = @context['another'] = "gnomeslab-and-or-liquid"
 
-    assert_evaluates_true(VariableLookup.new("one"), '==', VariableLookup.new("another"))
+    assert_evaluates_true(parse_variable_lookup("one"), '==', parse_variable_lookup("another"))
   end
 
   private
 
+  def parse_variable_lookup(markup)
+    if Liquid::Template.error_mode == :strict
+      p = Liquid::Parser.new(markup)
+      VariableLookup.strict_parse(p)
+    else
+      VariableLookup.lax_parse(markup)
+    end
+  end
+
   def assert_evaluates_true(left, op, right)
     assert(Condition.new(left, op, right).evaluate(@context),
       "Evaluated false: #{left} #{op} #{right}")

test/unit/parser_unit_test.rb

@@ -47,32 +47,41 @@ class ParserUnitTest < Minitest::Test
 
   def test_expressions
     p = Parser.new("hi.there hi?[5].there? hi.there.bob")
-    assert_equal('hi.there', p.expression)
-    assert_equal('hi?[5].there?', p.expression)
-    assert_equal('hi.there.bob', p.expression)
+    assert_equal(VariableLookup.send(:new, 'hi', ['there'], 0), p.expression)
+    assert_equal(VariableLookup.send(:new, 'hi?', [5, 'there?'], 0), p.expression)
+    assert_equal(VariableLookup.send(:new, 'hi', ['there', 'bob'], 0), p.expression)
+
+    p = Parser.new("nil true false")
+    assert_nil(p.expression)
+    assert_equal(true, p.expression)
+    assert_equal(false, p.expression)
 
     p = Parser.new("567 6.0 'lol' \"wut\"")
-    assert_equal('567', p.expression)
-    assert_equal('6.0', p.expression)
-    assert_equal("'lol'", p.expression)
-    assert_equal('"wut"', p.expression)
+    assert_equal(567, p.expression)
+    assert_equal(6.0, p.expression)
+    assert_equal('lol', p.expression)
+    assert_equal('wut', p.expression)
   end
 
   def test_ranges
     p = Parser.new("(5..7) (1.5..9.6) (young..old) (hi[5].wat..old)")
-    assert_equal('(5..7)', p.expression)
-    assert_equal('(1.5..9.6)', p.expression)
-    assert_equal('(young..old)', p.expression)
-    assert_equal('(hi[5].wat..old)', p.expression)
+    assert_equal(5..7, p.expression)
+    assert_equal(1..9, p.expression)
+    assert_equal(
+      RangeLookup.new(VariableLookup.send(:new, 'young', [], 0), VariableLookup.send(:new, 'old', [], 0)),
+      p.expression
+    )
+    assert_equal(
+      RangeLookup.new(VariableLookup.send(:new, 'hi', [5, "wat"], 0), VariableLookup.send(:new, 'old', [], 0)),
+      p.expression
+    )
   end
 
   def test_arguments
     p = Parser.new("filter: hi.there[5], keyarg: 7")
     assert_equal('filter', p.consume(:id))
     assert_equal(':', p.consume(:colon))
-    assert_equal('hi.there[5]', p.argument)
-    assert_equal(',', p.consume(:comma))
-    assert_equal('keyarg: 7', p.argument)
+    assert_equal([[VariableLookup.send(:new, "hi", ["there", 5], 0)], { "keyarg" => 7 }], p.arguments)
   end
 
   def test_invalid_expression

test/unit/variable_lookup_unit_test.rb

@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+class VariableLookupUnitTest < Minitest::Test
+  include Liquid
+
+  def test_variable_lookup_parsing
+    lookup = parse_variable_lookup('a.b.c')
+    assert_equal('a', lookup.name)
+    assert_equal(['b', 'c'], lookup.lookups)
+
+    lookup = parse_variable_lookup('a[b]')
+    assert_equal('a', lookup.name)
+    assert_equal([parse_variable_lookup('b')], lookup.lookups)
+  end
+
+  def test_to_s
+    lookup = parse_variable_lookup('a.b.c')
+    assert_equal("a['b']['c']", lookup.to_s)
+
+    lookup = parse_variable_lookup('a[b.c].d')
+    assert_equal("a[b['c']]['d']", lookup.to_s)
+
+    lookup = parse_variable_lookup('a["foo.bar"].d')
+    assert_equal("a['foo.bar']['d']", lookup.to_s)
+  end
+
+  private
+
+  def parse_variable_lookup(markup)
+    if Liquid::Template.error_mode == :strict
+      p = Liquid::Parser.new(markup)
+      VariableLookup.strict_parse(p)
+    else
+      VariableLookup.lax_parse(markup)
+    end
+  end
+end

test/unit/variable_unit_test.rb

@@ -7,20 +7,20 @@ class VariableUnitTest < Minitest::Test
 
   def test_variable
     var = create_variable('hello')
-    assert_equal(VariableLookup.new('hello'), var.name)
+    assert_equal(parse_variable_lookup('hello'), var.name)
   end
 
   def test_filters
     var = create_variable('hello | textileze')
-    assert_equal(VariableLookup.new('hello'), var.name)
+    assert_equal(parse_variable_lookup('hello'), var.name)
     assert_equal([['textileze', []]], var.filters)
 
     var = create_variable('hello | textileze | paragraph')
-    assert_equal(VariableLookup.new('hello'), var.name)
+    assert_equal(parse_variable_lookup('hello'), var.name)
     assert_equal([['textileze', []], ['paragraph', []]], var.filters)
 
     var = create_variable(%( hello | strftime: '%Y'))
-    assert_equal(VariableLookup.new('hello'), var.name)
+    assert_equal(parse_variable_lookup('hello'), var.name)
     assert_equal([['strftime', ['%Y']]], var.filters)
 
     var = create_variable(%( 'typo' | link_to: 'Typo', true ))
@@ -44,11 +44,11 @@ class VariableUnitTest < Minitest::Test
     assert_equal([['repeat', [3, 3, 3]]], var.filters)
 
     var = create_variable(%( hello | strftime: '%Y, okay?'))
-    assert_equal(VariableLookup.new('hello'), var.name)
+    assert_equal(parse_variable_lookup('hello'), var.name)
     assert_equal([['strftime', ['%Y, okay?']]], var.filters)
 
     var = create_variable(%( hello | things: "%Y, okay?", 'the other one'))
-    assert_equal(VariableLookup.new('hello'), var.name)
+    assert_equal(parse_variable_lookup('hello'), var.name)
     assert_equal([['things', ['%Y, okay?', 'the other one']]], var.filters)
   end
 
@@ -60,22 +60,24 @@ class VariableUnitTest < Minitest::Test
 
   def test_filters_without_whitespace
     var = create_variable('hello | textileze | paragraph')
-    assert_equal(VariableLookup.new('hello'), var.name)
+    assert_equal(parse_variable_lookup('hello'), var.name)
     assert_equal([['textileze', []], ['paragraph', []]], var.filters)
 
     var = create_variable('hello|textileze|paragraph')
-    assert_equal(VariableLookup.new('hello'), var.name)
+    assert_equal(parse_variable_lookup('hello'), var.name)
     assert_equal([['textileze', []], ['paragraph', []]], var.filters)
 
     var = create_variable("hello|replace:'foo','bar'|textileze")
-    assert_equal(VariableLookup.new('hello'), var.name)
+    assert_equal(parse_variable_lookup('hello'), var.name)
     assert_equal([['replace', ['foo', 'bar']], ['textileze', []]], var.filters)
   end
 
   def test_symbol
-    var = create_variable("http://disney.com/logo.gif | image: 'med' ", error_mode: :lax)
-    assert_equal(VariableLookup.new('http://disney.com/logo.gif'), var.name)
-    assert_equal([['image', ['med']]], var.filters)
+    with_error_mode(:lax) do
+      var = create_variable("http://disney.com/logo.gif | image: 'med' ", error_mode: :lax)
+      assert_equal(parse_variable_lookup('http://disney.com/logo.gif'), var.name)
+      assert_equal([['image', ['med']]], var.filters)
+    end
   end
 
   def test_string_to_filter
@@ -105,8 +107,8 @@ class VariableUnitTest < Minitest::Test
   end
 
   def test_dashes
-    assert_equal(VariableLookup.new('foo-bar'), create_variable('foo-bar').name)
-    assert_equal(VariableLookup.new('foo-bar-2'), create_variable('foo-bar-2').name)
+    assert_equal(parse_variable_lookup('foo-bar'), create_variable('foo-bar').name)
+    assert_equal(parse_variable_lookup('foo-bar-2'), create_variable('foo-bar-2').name)
 
     with_error_mode :strict do
       assert_raises(Liquid::SyntaxError) { create_variable('foo - bar') }
@@ -122,18 +124,18 @@ class VariableUnitTest < Minitest::Test
 
   def test_string_dot
     var = create_variable(%( test.test ))
-    assert_equal(VariableLookup.new('test.test'), var.name)
+    assert_equal(parse_variable_lookup('test.test'), var.name)
   end
 
   def test_filter_with_keyword_arguments
     var = create_variable(%( hello | things: greeting: "world", farewell: 'goodbye'))
-    assert_equal(VariableLookup.new('hello'), var.name)
+    assert_equal(parse_variable_lookup('hello'), var.name)
     assert_equal([['things', [], { 'greeting' => 'world', 'farewell' => 'goodbye' }]], var.filters)
   end
 
   def test_lax_filter_argument_parsing
     var = create_variable(%( number_of_comments | pluralize: 'comment': 'comments' ), error_mode: :lax)
-    assert_equal(VariableLookup.new('number_of_comments'), var.name)
+    assert_equal(parse_variable_lookup('number_of_comments'), var.name)
     assert_equal([['pluralize', ['comment', 'comments']]], var.filters)
   end
 
@@ -150,14 +152,17 @@ class VariableUnitTest < Minitest::Test
     assert_equal(" name_of_variable | upcase ", var.raw)
   end
 
-  def test_variable_lookup_interface
-    lookup = VariableLookup.new('a.b.c')
-    assert_equal('a', lookup.name)
-    assert_equal(['b', 'c'], lookup.lookups)
-  end
-
   private
 
+  def parse_variable_lookup(markup)
+    if Liquid::Template.error_mode == :strict
+      p = Liquid::Parser.new(markup)
+      VariableLookup.strict_parse(p)
+    else
+      VariableLookup.lax_parse(markup)
+    end
+  end
+
   def create_variable(markup, options = {})
     Variable.new(markup, ParseContext.new(options))
   end