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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# Checks for the instantiation of regexp using redundant `Regexp.new` or `Regexp.compile`.
# Autocorrect replaces to regexp literal which is the simplest and fastest.
#
# @example
#
# # bad
# Regexp.new(/regexp/)
# Regexp.compile(/regexp/)
#
# # good
# /regexp/
# Regexp.new('regexp')
# Regexp.compile('regexp')
#
class RedundantRegexpConstructor < Base
extend AutoCorrector
MSG = 'Remove the redundant `Regexp.%<method>s`.'
RESTRICT_ON_SEND = %i[new compile].freeze
# @!method redundant_regexp_constructor(node)
def_node_matcher :redundant_regexp_constructor, <<~PATTERN
(send
(const {nil? cbase} :Regexp) {:new :compile}
(regexp $... (regopt $...)))
PATTERN
def on_send(node)
return unless (regexp, regopt = redundant_regexp_constructor(node))
add_offense(node, message: format(MSG, method: node.method_name)) do |corrector|
pattern = regexp.map(&:source).join
regopt = regopt.join
corrector.replace(node, "/#{pattern}/#{regopt}")
end
end
end
end
end
end
Version data entries
151 entries across 150 versions & 15 rubygems