Class: RuboCop::Cop::Style::RedundantRegexpConstructor

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector
Defined in:
lib/rubocop/cop/style/redundant_regexp_constructor.rb

Overview

Checks for the instantiation of regexp using redundant ‘Regexp.new` or `Regexp.compile`. Autocorrect replaces to regexp literal which is the simplest and fastest.

Examples:


# bad
Regexp.new(/regexp/)
Regexp.compile(/regexp/)

# good
/regexp/
Regexp.new('regexp')
Regexp.compile('regexp')

Constant Summary collapse

MSG = 
'Remove the redundant `Regexp.%<method>s`.'
RESTRICT_ON_SEND = 
%i[new compile].freeze

Instance Attribute Summary

Attributes inherited from Base

#config, #processed_source

Instance Method Summary collapse

Methods included from AutoCorrector

support_autocorrect?

Methods inherited from Base

#active_support_extensions_enabled?, #add_global_offense, #add_offense, #always_autocorrect?, autocorrect_incompatible_with, badge, #begin_investigation, #callbacks_needed, callbacks_needed, #config_to_allow_offenses, #config_to_allow_offenses=, #contextual_autocorrect?, #cop_config, cop_name, #cop_name, department, documentation_url, exclude_from_registry, #excluded_file?, #external_dependency_checksum, inherited, #initialize, #inspect, joining_forces, lint?, match?, #message, #offenses, #on_investigation_end, #on_new_investigation, #on_other_file, #parse, #parser_engine, #ready, #relevant_file?, requires_gem, #string_literals_frozen_by_default?, support_autocorrect?, support_multiple_source?, #target_rails_version, #target_ruby_version

Methods included from ExcludeLimit

#exclude_limit

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #autocorrect_with_disable_uncorrectable?, #correctable?, #disable_uncorrectable?, #safe_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

silence_warnings

Constructor Details

This class inherits a constructor from RuboCop::Cop::Base

Instance Method Details

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/redundant_regexp_constructor.rb', line 33

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

#redundant_regexp_constructor(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/redundant_regexp_constructor.rb', line 27

def_node_matcher :redundant_regexp_constructor, <<~PATTERN
  (send
    (const {nil? cbase} :Regexp) {:new :compile}
    (regexp $... (regopt $...)))
PATTERN