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module CodeRay
module Scanners
class Scanner
# A WordList is a Hash with some additional features.
# It is intended to be used for keyword recognition.
class WordList < Hash
def initialize default = false, case_mode = :case_match
@case_ignore =
case case_mode
when :case_match then false
when :case_ignore then true
else
raise ArgumentError,
"#{self.class.name}.new: second argument must be :case_ignore or :case_match, but #{case_mode} was given."
end
if @case_ignore
super() do |h, k|
h[k] = h.fetch k.downcase, default
end
else
super default
end
end
def include? word
self[word] if @case_ignore
has_key? word
end
def add words, kind = true
words.each do |word|
self[mind_case(word)] = kind
end
self
end
alias words keys
def case_ignore?
@case_mode
end
private
def mind_case word
if @case_ignore
word.downcase
else
word.dup
end
end
end
end
end
end
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