Class: RuboCop::Cop::Style::RedundantFetchBlock
- Extended by:
- AutoCorrector
- Includes:
- FrozenStringLiteral, RangeHelp
- Defined in:
- lib/rubocop/cop/style/redundant_fetch_block.rb
Overview
This cop identifies places where ‘fetch(key) { value }` can be replaced by `fetch(key, value)`.
In such cases ‘fetch(key, value)` method is faster than `fetch(key) { value }`.
Constant Summary collapse
- MSG =
'Use `%<good>s` instead of `%<bad>s`.'
Constants included from FrozenStringLiteral
FrozenStringLiteral::FROZEN_STRING_LITERAL, FrozenStringLiteral::FROZEN_STRING_LITERAL_ENABLED, FrozenStringLiteral::FROZEN_STRING_LITERAL_TYPES
Constants inherited from Base
Instance Attribute Summary
Attributes inherited from Base
Instance Method Summary collapse
Methods included from AutoCorrector
Methods included from FrozenStringLiteral
frozen_string_literal_comment_exists?
Methods inherited from Base
#add_global_offense, #add_offense, autocorrect_incompatible_with, badge, #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, #ready, #relevant_file?, support_autocorrect?, support_multiple_source?, #target_rails_version, #target_ruby_version
Methods included from ExcludeLimit
Methods included from AutocorrectLogic
#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #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
#on_block(node) ⇒ Object
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# File 'lib/rubocop/cop/style/redundant_fetch_block.rb', line 49 def on_block(node) redundant_fetch_block_candidate?(node) do |send, body| return if should_not_check?(send, body) range = fetch_range(send, node) good = build_good_method(send, body) bad = build_bad_method(send, body) add_offense(range, message: format(MSG, good: good, bad: bad)) do |corrector| receiver, _, key = send.children default_value = body ? body.source : 'nil' corrector.replace(node, "#{receiver.source}.fetch(#{key.source}, #{default_value})") end end end |
#redundant_fetch_block_candidate?(node) ⇒ Object
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# File 'lib/rubocop/cop/style/redundant_fetch_block.rb', line 42 def_node_matcher :redundant_fetch_block_candidate?, <<~PATTERN (block $(send _ :fetch _) (args) ${nil? #basic_literal? #const_type?}) PATTERN |