Class | CodeRay::WordList |
In: |
lib/coderay/helpers/word_list.rb
|
Parent: | Hash |
A Hash subclass designed for mapping word lists to token types.
Copyright (c) 2006-2011 by murphy (Kornelius Kalnbach) <murphy rubychan de>
License: | LGPL / ask the author |
Version: | 2.0 (2011-05-08) |
A WordList is a Hash with some additional features. It is intended to be used for keyword recognition.
WordList is optimized to be used in Scanners, typically to decide whether a given ident is a special token.
For case insensitive words use WordList::CaseIgnoring.
Example:
# define word arrays RESERVED_WORDS = %w[ asm break case continue default do else ] PREDEFINED_TYPES = %w[ int long short char void ] # make a WordList IDENT_KIND = WordList.new(:ident). add(RESERVED_WORDS, :reserved). add(PREDEFINED_TYPES, :predefined_type) ... def scan_tokens tokens, options ... elsif scan(/[A-Za-z_][A-Za-z_0-9]*/) # use it kind = IDENT_KIND[match] ...