Class: RuboCop::Cop::Lint::DuplicateRegexpCharacterClassElement

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector
Includes:
RangeHelp
Defined in:
lib/rubocop/cop/lint/duplicate_regexp_character_class_element.rb

Overview

Checks for duplicate elements in Regexp character classes.

Examples:


# bad
r = /[xyx]/

# bad
r = /[0-9x0-9]/

# good
r = /[xy]/

# good
r = /[0-9x]/

Constant Summary collapse

MSG_REPEATED_ELEMENT = 
'Duplicate element inside regexp character class'
OCTAL_DIGITS_AFTER_ESCAPE = 
2

Constants inherited from Base

Base::RESTRICT_ON_SEND

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

#each_repeated_character_class_element_loc(node) ⇒ Object 



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# File 'lib/rubocop/cop/lint/duplicate_regexp_character_class_element.rb', line 37

def each_repeated_character_class_element_loc(node)
  node.parsed_tree&.each_expression do |expr|
    next if skip_expression?(expr)

    seen = Set.new
    group_expressions(node, expr.expressions) do |group|
      group_source = group.map(&:to_s).join

      yield source_range(group) if seen.include?(group_source)

      seen << group_source
    end
  end
end

#on_regexp(node) ⇒ Object 



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# File 'lib/rubocop/cop/lint/duplicate_regexp_character_class_element.rb', line 29

def on_regexp(node)
  each_repeated_character_class_element_loc(node) do |loc|
    add_offense(loc, message: MSG_REPEATED_ELEMENT) do |corrector|
      corrector.remove(loc)
    end
  end
end