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Versions: 6
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Contents
module Regexp::Expression
class Subexpression < Regexp::Expression::Base
include Enumerable
attr_accessor :expressions
def initialize(token, options = {})
super
self.expressions = []
end
# Override base method to clone the expressions as well.
def initialize_clone(other)
other.expressions = expressions.map(&:clone)
super
end
def <<(exp)
if exp.is_a?(WhiteSpace) && last && last.is_a?(WhiteSpace)
last.merge(exp)
else
exp.nesting_level = nesting_level + 1
expressions << exp
end
end
%w[[] at each empty? fetch index join last length values_at].each do |method|
class_eval <<-RUBY, __FILE__, __LINE__ + 1
def #{method}(*args, &block)
expressions.#{method}(*args, &block)
end
RUBY
end
def dig(*indices)
exp = self
indices.each { |idx| exp = exp.nil? || exp.terminal? ? nil : exp[idx] }
exp
end
def te
ts + to_s.length
end
def to_s(format = :full)
# Note: the format does not get passed down to subexpressions.
# Note: cant use #text accessor, b/c it is overriden as def text; to_s end
# in Expression::Sequence, causing infinite recursion. Clean-up needed.
"#{@text}#{expressions.join}#{quantifier_affix(format)}"
end
def to_h
attributes.merge({
text: to_s(:base),
expressions: expressions.map(&:to_h)
})
end
end
end
Version data entries
6 entries across 6 versions & 2 rubygems