Class: RuboCop::Cop::Style::RedundantFreeze

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

Overview

Check for uses of ‘Object#freeze` on immutable objects.

NOTE: Regexp and Range literals are frozen objects since Ruby 3.0.

NOTE: From Ruby 3.0, this cop allows explicit freezing of interpolated string literals when ‘# frozen-string-literal: true` is used.

Examples:

# bad
CONST = 1.freeze

# good
CONST = 1

Constant Summary collapse

MSG = 
'Do not freeze immutable objects, as freezing them has no effect.'
RESTRICT_ON_SEND = 
%i[freeze].freeze

Constants included from FrozenStringLiteral

FrozenStringLiteral::FROZEN_STRING_LITERAL, FrozenStringLiteral::FROZEN_STRING_LITERAL_ENABLED

Instance Attribute Summary

Attributes inherited from Base

#config, #processed_source

Instance Method Summary collapse

Methods included from AutoCorrector

support_autocorrect?

Methods included from FrozenStringLiteral

frozen_string_literal_comment_exists?

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_freeze.rb', line 26

def on_send(node)
  return unless node.receiver &&
                (immutable_literal?(node.receiver) ||
                 operation_produces_immutable_object?(node.receiver))

  add_offense(node) do |corrector|
    corrector.remove(node.loc.dot)
    corrector.remove(node.loc.selector)
  end
end