Class: RuboCop::Cop::Style::ConstantVisibility

Inherits:
Base
  • Object
show all
Defined in:
lib/rubocop/cop/style/constant_visibility.rb

Overview

Checks that constants defined in classes and modules have an explicit visibility declaration. By default, Ruby makes all class- and module constants public, which litters the public API of the class or module. Explicitly declaring a visibility makes intent more clear, and prevents outside actors from touching private state.

Examples:


# bad
class Foo
  BAR = 42
  BAZ = 43
end

# good
class Foo
  BAR = 42
  private_constant :BAR

  BAZ = 43
  public_constant :BAZ
end

IgnoreModules: false (default)

# bad
class Foo
  MyClass = Struct.new()
end

# good
class Foo
  MyClass = Struct.new()
  public_constant :MyClass
end

IgnoreModules: true

# good
class Foo
  MyClass = Struct.new()
end

Constant Summary collapse

MSG = 
'Explicitly make `%<constant_name>s` public or private using ' \
'either `#public_constant` or `#private_constant`.'

Constants inherited from Base

Base::RESTRICT_ON_SEND

Instance Attribute Summary

Attributes inherited from Base

#config, #processed_source

Instance Method Summary collapse

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_casgn(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/constant_visibility.rb', line 51

def on_casgn(node)
  return unless class_or_module_scope?(node)
  return if visibility_declaration?(node)
  return if ignore_modules? && module?(node)

  add_offense(node, message: format(MSG, constant_name: node.name))
end