Class: RuboCop::Cop::Lint::RequireParentheses
- Includes:
- IfNode
- Defined in:
- lib/rubocop/cop/lint/require_parentheses.rb
Overview
This cop checks for expressions where there is a call to a predicate method with at least one argument, where no parentheses are used around the parameter list, and a boolean operator, && or ||, is used in the last argument.
The idea behind warning for these constructs is that the user might be under the impression that the return value from the method call is an operand of &&/||.
Constant Summary collapse
- MSG =
'Use parentheses in the method call to avoid confusion about ' \ 'precedence.'.freeze
Constants included from Util
Util::ASGN_NODES, Util::BYTE_ORDER_MARK, Util::EQUALS_ASGN_NODES, Util::LITERAL_REGEX, Util::OPERATOR_METHODS, Util::SHORTHAND_ASGN_NODES, Util::STRING_ESCAPES, Util::STRING_ESCAPE_REGEX
Instance Attribute Summary
Attributes inherited from Cop
#config, #corrections, #offenses, #processed_source
Instance Method Summary collapse
Methods included from IfNode
#elsif?, #if_else?, #if_node_parts, #modifier_if?, #ternary_op?
Methods inherited from Cop
#add_offense, all, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, cop_type, #correct, #debug?, #details, #display_cop_names?, #display_style_guide?, #excluded_file?, #extra_details?, inherited, #initialize, #join_force?, lint?, match?, #message, non_rails, #parse, qualified_cop_name, #reference_url, #relevant_file?, #style_guide_url, #target_ruby_version
Methods included from Sexp
Methods included from NodePattern::Macros
#def_node_matcher, #def_node_search, #node_search_body
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?, block_length, comment_line?, directions, double_quotes_acceptable?, double_quotes_required?, effective_column, ends_its_line?, first_part_of_call_chain, interpret_string_escapes, line_range, move_pos, numeric_range_size, on_node, operator?, parentheses?, range_with_surrounding_comma, range_with_surrounding_space, source_range, strip_quotes, to_string_literal, to_symbol_literal, within_node?
Methods included from PathUtil
absolute?, hidden?, issue_deprecation_warning, match_path?, relative_path
Constructor Details
This class inherits a constructor from RuboCop::Cop::Cop
Instance Method Details
#on_send(node) ⇒ Object
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# File 'lib/rubocop/cop/lint/require_parentheses.rb', line 27 def on_send(node) _receiver, method_name, *args = *node return if parentheses?(node) return if args.empty? if ternary_op?(args.first) check_ternary(args.first, node) elsif predicate?(method_name) # We're only checking predicate methods. There would be false # positives otherwise. check_send(args.last, node) end end |