Class: Peggy::Reference

Inherits:

Element

• Object
• Element
• Peggy::Reference

Defined in:

lib/parse/builder.rb

Overview

Match another production in the grammar.

Direct Known Subclasses

Production

Instance Attribute Summary

• #name ⇒ Object

  The name of the production to lookup and match.

Instance Method Summary

• #initialize(name = nil) ⇒ Reference constructor

  Init the name.

• #match(parser, index) ⇒ Object

  Match the entire production from the parser grammar.

• #to_s ⇒ Object

  Convert element to String.

Methods inherited from Element

build, #report

Constructor Details

#initialize(name = nil) ⇒ Reference

Init the name

# File 'lib/parse/builder.rb', line 232

def initialize name=nil
  self.name = name
end

Instance Attribute Details

#name ⇒ Object

The name of the production to lookup and match.

# File 'lib/parse/builder.rb', line 229

def name
  @name
end

Instance Method Details

#match(parser, index) ⇒ Object

Match the entire production from the parser grammar. If it matches the end index is returned. If not, NO_MATCH is returned.

# File 'lib/parse/builder.rb', line 243

def match parser, index
  raise "reference name not set" unless name
  parser.match? name, index
end

#to_s ⇒ Object

Convert element to String.

# File 'lib/parse/builder.rb', line 249

def to_s
  @name
end