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'

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, autocorrect_incompatible_with, badge, #begin_investigation, callbacks_needed, #callbacks_needed, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, department, documentation_url, exclude_from_registry, #excluded_file?, #external_dependency_checksum, inherited, #initialize, joining_forces, lint?, match?, #message, #offenses, #on_investigation_end, #on_new_investigation, #on_other_file, #parse, #ready, #relevant_file?, 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

rubocop:disable Metrics/AbcSize, Metrics/MethodLength



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
 
# File 'lib/rubocop/cop/lint/duplicate_regexp_character_class_element.rb', line 36

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

    seen = Set.new
    enum = expr.expressions.to_enum
    expression_count = expr.expressions.count

    expression_count.times do |current_number|
      current_child = enum.next
      next if within_interpolation?(node, current_child)

      current_child_source = current_child.to_s
      next_child = enum.peek if current_number + 1 < expression_count

      if seen.include?(current_child_source)
        next if start_with_escaped_zero_number?(current_child_source, next_child.to_s)

        yield current_child.expression
      end

      seen << current_child_source
    end
  end
end

#on_regexp(node) ⇒ Object 



27
28
29
30
31
32
33
 
# File 'lib/rubocop/cop/lint/duplicate_regexp_character_class_element.rb', line 27

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