Class: CodeRay::WordList
- Inherits:
-
Hash
- Object
- Hash
- CodeRay::WordList
- Defined in:
- lib/coderay/helpers/word_list.rb
Overview
WordList
A Hash subclass designed for mapping word lists to token types.
Copyright © 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]
...
Direct Known Subclasses
Defined Under Namespace
Classes: CaseIgnoring
Instance Method Summary collapse
-
#add(words, value = true) ⇒ Object
Add words to the list and associate them with
value
. -
#initialize(default = false) ⇒ WordList
constructor
Create a new WordList with
default
as default value.
Constructor Details
#initialize(default = false) ⇒ WordList
Create a new WordList with default
as default value.
48 49 50 |
# File 'lib/coderay/helpers/word_list.rb', line 48 def initialize default = false super default end |
Instance Method Details
#add(words, value = true) ⇒ Object
Add words to the list and associate them with value
.
Returns self
, so you can concat add calls.
55 56 57 58 |
# File 'lib/coderay/helpers/word_list.rb', line 55 def add words, value = true words.each { |word| self[word] = value } self end |