Class: RuboCop::Cop::Style::EachWithObject
- Includes:
- RangeHelp
- Defined in:
- lib/rubocop/cop/style/each_with_object.rb
Overview
This cop looks for inject / reduce calls where the passed in object is returned at the end and so could be replaced by each_with_object without the need to return the object at the end.
However, we can’t replace with each_with_object if the accumulator parameter is assigned to within the block.
Constant Summary collapse
- MSG =
'Use `each_with_object` instead of `%<method>s`.'
- METHODS =
%i[inject reduce].freeze
Constants included from Util
Instance Attribute Summary
Attributes inherited from Cop
#config, #corrections, #offenses, #processed_source
Instance Method Summary collapse
-
#autocorrect(node) ⇒ Object
rubocop:disable Metrics/AbcSize.
- #on_block(node) ⇒ Object
Methods inherited from Cop
#add_offense, all, autocorrect_incompatible_with, badge, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, #correct, department, #duplicate_location?, #excluded_file?, #find_location, #highlights, inherited, #initialize, #join_force?, lint?, match?, #message, #messages, non_rails, #parse, qualified_cop_name, #relevant_file?, #target_rails_version, #target_ruby_version
Methods included from AST::Sexp
Methods included from NodePattern::Macros
#def_node_matcher, #def_node_search, #node_search, #node_search_all, #node_search_body, #node_search_first
Methods included from AutocorrectLogic
#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #support_autocorrect?
Methods included from IgnoredNode
#ignore_node, #ignored_node?, #part_of_ignored_node?
Methods included from Util
begins_its_line?, comment_line?, double_quotes_required?, escape_string, first_part_of_call_chain, interpret_string_escapes, line_range, needs_escaping?, on_node, parentheses?, same_line?, to_string_literal, to_supported_styles, tokens, trim_string_interporation_escape_character
Methods included from PathUtil
absolute?, chdir, hidden_dir?, hidden_file_in_not_hidden_dir?, match_path?, pwd, relative_path, reset_pwd, smart_path
Constructor Details
This class inherits a constructor from RuboCop::Cop::Cop
Instance Method Details
#autocorrect(node) ⇒ Object
rubocop:disable Metrics/AbcSize
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# File 'lib/rubocop/cop/style/each_with_object.rb', line 45 def autocorrect(node) lambda do |corrector| corrector.replace(node.send_node.loc.selector, 'each_with_object') first_arg, second_arg = *node.arguments corrector.replace(first_arg.loc.expression, second_arg.source) corrector.replace(second_arg.loc.expression, first_arg.source) return_value = return_value(node.body) if return_value_occupies_whole_line?(return_value) corrector.remove(whole_line_expression(return_value)) else corrector.remove(return_value.loc.expression) end end end |
#on_block(node) ⇒ Object
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# File 'lib/rubocop/cop/style/each_with_object.rb', line 29 def on_block(node) each_with_object_candidate?(node) do |method, args, body| _, method_name, method_arg = *method return if simple_method_arg?(method_arg) return_value = return_value(body) return unless return_value return unless first_argument_returned?(args, return_value) return if accumulator_param_assigned_to?(body, args) add_offense(node, location: method.loc.selector, message: format(MSG, method: method_name)) end end |