Class: Packrat::ASTBuilder

Inherits:
ResultProducer show all
Defined in:
lib/packrat/grammar.rb

Overview

Build AST tree as result of parsing a Production.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(nodeName, nameMap = {}) ⇒ ASTBuilder

Returns a new instance of ASTBuilder.



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# File 'lib/packrat/grammar.rb', line 324

def initialize(nodeName, nameMap = {})
  @name, @name_map = nodeName, nameMap
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/packrat/grammar.rb', line 323

def name
  @name
end

Instance Method Details

#finalize_result(res) ⇒ Object 



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# File 'lib/packrat/grammar.rb', line 337

def finalize_result(res)
  @ast_class.new(res, {:only_nonconstant => true})
end

#new_result ⇒ Object 



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# File 'lib/packrat/grammar.rb', line 332

def new_result; Array.new; end

#production=(prod) ⇒ Object 



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# File 'lib/packrat/grammar.rb', line 327

def production=(prod)
  super
  @ast_class = prod.grammar.ast_class(@name, prod, @name_map)
end

#update_result(res, subres, elem, index, nhIndex) ⇒ Object 



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# File 'lib/packrat/grammar.rb', line 333

def update_result(res, subres, elem, index, nhIndex)
  res << subres unless @ast_class.constant_elem_at?(nhIndex)
  res
end