Class: RuboCop::Cop::Lint::UselessSetterCall
- Defined in:
- lib/rubocop/cop/lint/useless_setter_call.rb
Overview
This cop checks for setter call to local variable as the final expression of a function definition.
Defined Under Namespace
Classes: MethodVariableTracker
Constant Summary collapse
- MSG =
'Useless setter call to local variable `%<variable>s`.'
- ASSIGNMENT_TYPES =
%i[lvasgn ivasgn cvasgn gvasgn].freeze
Constants included from Util
Instance Attribute Summary
Attributes inherited from Cop
#config, #corrections, #offenses, #processed_source
Instance Method Summary collapse
- #on_def(node) ⇒ Object (also: #on_defs)
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
#on_def(node) ⇒ Object Also known as: on_defs
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# File 'lib/rubocop/cop/lint/useless_setter_call.rb', line 31 def on_def(node) return unless node.body last_expr = last_expression(node.body) return unless setter_call_to_local_variable?(last_expr) tracker = MethodVariableTracker.new(node.body) receiver, = *last_expr variable_name, = *receiver return unless tracker.contain_local_object?(variable_name) add_offense( receiver, location: :name, message: format(MSG, variable: receiver.loc.name.source) ) end |