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Versions: 7
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Contents
module Regexp::Expression
module Conditional
class TooManyBranches < StandardError
def initialize
super('The conditional expression has more than 2 branches')
end
end
class Condition < Regexp::Expression::Base; end
class Branch < Regexp::Expression::Sequence; end
class Expression < Regexp::Expression::Subexpression
def initialize(token, options = {})
super
@condition = nil
@branches = []
end
def condition(exp = nil)
return @condition unless exp
@condition = exp
@expressions << exp
end
def <<(exp)
@expressions.last << exp
end
def branch(exp = nil)
raise TooManyBranches.new if @branches.length == 2
sequence = Branch.new(level, set_level, conditional_level + 1)
@expressions << sequence
@branches << @expressions.last
end
def branches
@branches
end
def quantify(token, text, min = nil, max = nil, mode = :greedy)
branches.last.last.quantify(token, text, min, max, mode)
end
def to_s
s = @text.dup
s << @condition.text
s << branches.map{|e| e.to_s}.join('|')
s << ')'
end
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems