Class: Rattler::Parsers::Eof

Inherits:
Predicate show all
Includes:
Singleton
Defined in:
lib/rattler/parsers/eof.rb

Overview

Eof succeeds if there is no more input to parse.

Author:

  • Jason Arhart

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Predicate

#capturing?

Methods inherited from Parser

#&, #capturing?, #labeled?, #one_or_more, #optional, #skip, #variable_capture_count?, #zero_or_more, #|

Methods inherited from Util::Node

#==, #[], #attrs, #can_equal?, #child, #children, #each, #empty?, #eql?, #initialize, #inspect, #method_missing, #name, #respond_to?, #same_contents?, #to_graphviz, #with_attrs, #with_attrs!, #with_children

Constructor Details

This class inherits a constructor from Rattler::Util::Node

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Rattler::Util::Node

Class Method Details

.[] ⇒ Eof

Return the singleton instance of Eof

Returns:

  • (Eof) —

    the singleton instance



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# File 'lib/rattler/parsers/eof.rb', line 23

def self.[]()
  self.instance
end

.parsed(*_) ⇒ Object 



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# File 'lib/rattler/parsers/eof.rb', line 28

def self.parsed(*_) #:nodoc:

  self.instance
end

Instance Method Details

#parse(scanner, rules, labeled = {}) ⇒ Object

Return true if there is no more input to parse

Returns:

  • true if there is no more input to parse



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# File 'lib/rattler/parsers/eof.rb', line 37

def parse(scanner, rules, labeled = {})
  scanner.eos?
end

#with_ws(ws) ⇒ Parser

Return a new parser that uses ws to skip whitespace before matching.

Parameters:

  • ws (Parser) —

    the parser used to skip whitespace

Returns:

  • (Parser) —

    a new parser that uses ws to skip whitespace



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# File 'lib/rattler/parsers/eof.rb', line 45

def with_ws(ws)
  Skip[ws] & self
end