xref: /external/antlr/antlr-3.4/runtime/Ruby/lib/antlr3/modes/ast-builder.rb

#!/usr/bin/ruby
# encoding: utf-8
require 'antlr3'
require 'antlr3/tree'

module ANTLR3
module ASTBuilder
  extend ClassMacros
  
  def self.included( klass )
    def klass.return_scope_members
      super.push( :tree )
    end
  end
  
  def initialize( input, options = {} )
    @adaptor = options[ :adaptor ] ||= begin
      ( input.adaptor rescue nil ) or
        AST::CommonTreeAdaptor.new( token_class )
    end
    super( input, options )
  end
  
  shared_attribute( :adaptor )
  
private
  
  def subtree_stream( desc, element = nil )
    AST::RewriteRuleSubtreeStream.new( @adaptor, desc, element )
  end
  
  def token_stream( desc, element = nil )
    AST::RewriteRuleTokenStream.new( @adaptor, desc, element )
  end
  
  def node_stream( desc, element = nil )
    AST::RewriteRuleNodeStream.new( @adaptor, desc, element )
  end
end
end