Class: Rattler::Parsers::Token

Inherits:
Parser show all
Defined in:
lib/rattler/parsers/token.rb

Overview

Token decorates a parser to return the entire matched string

Author:

  • Jason Arhart

Instance Method Summary collapse

Methods inherited from Parser

#&, #capturing?, #labeled?, #one_or_more, #optional, parsed, #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

Instance Method Details

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

If the decorated parser matches return the entire matched string, otherwise return a false value.

Returns:

  • the matched string, or nil



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# File 'lib/rattler/parsers/token.rb', line 24

def parse(scanner, rules, scope = {})
  p = scanner.pos
  child.parse(scanner, rules, scope) && scanner.string[p...(scanner.pos)]
end

#with_ws(ws) ⇒ Parser

Returns a new parser that uses ws to skip whitespace.

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/token.rb', line 31

def with_ws(ws)
  ws.skip & self
end