Class: RuboCop::Cop::Style::EmptyLiteral
- Extended by:
- AutoCorrector
- Defined in:
- lib/rubocop/cop/style/empty_literal.rb
Overview
Checks for the use of a method, the result of which would be a literal, like an empty array, hash, or string.
NOTE: When frozen string literals are enabled, ‘String.new` isn’t corrected to an empty string since the former is mutable and the latter would be frozen.
Constant Summary collapse
- ARR_MSG =
'Use array literal `[]` instead of `%<current>s`.'
- HASH_MSG =
'Use hash literal `{}` instead of `%<current>s`.'
- STR_MSG =
'Use string literal `%<prefer>s` instead of `String.new`.'
- RESTRICT_ON_SEND =
i[new [] Array Hash].freeze
Constants included from RangeHelp
RangeHelp::BYTE_ORDER_MARK, RangeHelp::NOT_GIVEN
Constants included from FrozenStringLiteral
FrozenStringLiteral::FROZEN_STRING_LITERAL_ENABLED
Instance Attribute Summary
Attributes inherited from Base
Instance Method Summary collapse
- #array_node(node) ⇒ Object
- #array_with_block(node) ⇒ Object
- #array_with_index(node) ⇒ Object
- #hash_node(node) ⇒ Object
- #hash_with_block(node) ⇒ Object
- #hash_with_index(node) ⇒ Object
- #on_send(node) ⇒ Object
- #str_node(node) ⇒ Object
Methods included from AutoCorrector
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_gem_version, #target_rails_version, #target_ruby_version
Methods included from ExcludeLimit
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
Constructor Details
This class inherits a constructor from RuboCop::Cop::Base
Instance Method Details
#array_node(node) ⇒ Object
38 |
# File 'lib/rubocop/cop/style/empty_literal.rb', line 38 def_node_matcher :array_node, '(send (const {nil? cbase} :Array) :new (array)?)' |
#array_with_block(node) ⇒ Object
47 |
# File 'lib/rubocop/cop/style/empty_literal.rb', line 47 def_node_matcher :array_with_block, '(block (send (const {nil? cbase} :Array) :new) args _)' |
#array_with_index(node) ⇒ Object
58 59 60 61 62 63 |
# File 'lib/rubocop/cop/style/empty_literal.rb', line 58 def_node_matcher :array_with_index, "{\n (send (const {nil? cbase} :Array) :[])\n (send nil? :Array (array))\n}\n" |
#hash_node(node) ⇒ Object
41 |
# File 'lib/rubocop/cop/style/empty_literal.rb', line 41 def_node_matcher :hash_node, '(send (const {nil? cbase} :Hash) :new)' |
#hash_with_block(node) ⇒ Object
50 51 52 53 54 55 |
# File 'lib/rubocop/cop/style/empty_literal.rb', line 50 def_node_matcher :hash_with_block, "{\n (block (send (const {nil? cbase} :Hash) :new) args _)\n (numblock (send (const {nil? cbase} :Hash) :new) ...)\n}\n" |
#hash_with_index(node) ⇒ Object
66 67 68 69 70 71 |
# File 'lib/rubocop/cop/style/empty_literal.rb', line 66 def_node_matcher :hash_with_index, "{\n (send (const {nil? cbase} :Hash) :[])\n (send nil? :Hash (array))\n}\n" |
#on_send(node) ⇒ Object
73 74 75 76 77 78 79 |
# File 'lib/rubocop/cop/style/empty_literal.rb', line 73 def on_send(node) return unless ( = (node)) add_offense(node, message: ) do |corrector| corrector.replace(replacement_range(node), correction(node)) end end |
#str_node(node) ⇒ Object
44 |
# File 'lib/rubocop/cop/style/empty_literal.rb', line 44 def_node_matcher :str_node, '(send (const {nil? cbase} :String) :new)' |