Code improvements

lib/liquid/block_body.rb

@@ -154,7 +154,7 @@ module Liquid
     private
 
     def render_node(context, output, node)
-      node.disabled?(context, output) && return if node.is_a?(Tag)
+      return if node.is_a?(Tag) && node.disabled?(context, output)
       node.render_to_output_buffer(context, output)
     rescue UndefinedVariable, UndefinedDropMethod, UndefinedFilter => e
       context.handle_error(e, node.line_number)

lib/liquid/registers/disabled_tags.rb

@@ -2,30 +2,31 @@
 module Liquid
   class DisabledTags < Register
     def initialize
-      @disabled_tags = Hash.new { |h, k| h[k] = 0 }
+      @disabled_tags = {}
     end
 
     def disabled?(tag)
-      @disabled_tags[tag] > 0
+      @disabled_tags.key?(tag) && @disabled_tags[tag] > 0
     end
 
     def disable(tags)
-      tags.each { |tag| increment(tag) }
+      tags.each(&method(:increment))
       yield
     ensure
-      tags.each { |tag| decrement(tag) }
+      tags.each(&method(:decrement))
     end
 
     private
 
     def increment(tag)
-      @disabled_tags[tag] = @disabled_tags[tag] + 1
+      @disabled_tags[tag] ||= 0
+      @disabled_tags[tag] += 1
     end
 
     def decrement(tag)
-      @disabled_tags[tag] = @disabled_tags[tag] - 1
+      @disabled_tags[tag] -= 1
     end
   end
 
-  Template.register_register('disabled_tags', DisabledTags.new)
+  Template.add_register('disabled_tags', DisabledTags.new)
 end

lib/liquid/tag.rb

@@ -40,18 +40,16 @@ module Liquid
 
     def disabled?(context, output)
       if context.registers['disabled_tags']&.disabled?(tag_name)
-        output << disabled_response
+        output << disabled_error_message
       end
     end
 
-    def disabled_response
+    def disabled_error_message
       "#{tag_name} #{options[:locale].t('errors.disabled.tag')}"
     end
 
-    def disable_tags(context, tags)
-      context.registers['disabled_tags'].disable(tags) do
-        yield
-      end
+    def disable_tags(context, tags, &block)
+      context.registers['disabled_tags'].disable(tags, &block)
     end
 
     # For backwards compatibility with custom tags. In a future release, the semantics

lib/liquid/tags/render.rb

@@ -3,6 +3,7 @@
 module Liquid
   class Render < Tag
     SYNTAX = /(#{QuotedString})#{QuotedFragment}*/o
+    DISABLED_TAGS = %w(include)
 
     attr_reader :template_name_expr, :attributes
 
@@ -22,7 +23,7 @@ module Liquid
     end
 
     def render_to_output_buffer(context, output)
-      disable_tags(context, %w(include)) do
+      disable_tags(context, DISABLED_TAGS) do
         render_tag(context, output)
       end
     end

lib/liquid/template.rb

@@ -92,7 +92,7 @@ module Liquid
         @tags ||= TagRegistry.new
       end
 
-      def register_register(name, klass)
+      def add_register(name, klass)
         registers[name.to_s] = klass
       end