Class: RuboCop::Cop::Style::Lambda
- Includes:
- AutocorrectUnlessChangingAST
- Defined in:
- lib/rubocop/cop/style/lambda.rb
Overview
This cop checks for uses of the pre 1.9 lambda syntax for one-line anonymous functions and uses of the 1.9 lambda syntax for multi-line anonymous functions.
Constant Summary collapse
- SINGLE_MSG =
'Use the new lambda literal syntax `->(params) {...}`.'
- SINGLE_NO_ARG_MSG =
'Use the new lambda literal syntax `-> {...}`.'
- MULTI_MSG =
'Use the `lambda` method for multi-line lambdas.'
- TARGET =
s(:send, nil, :lambda)
Constants included from Util
Util::ASGN_NODES, Util::EQUALS_ASGN_NODES, Util::OPERATOR_METHODS, Util::PROC_NEW_NODE, Util::SHORTHAND_ASGN_NODES
Instance Attribute Summary
Attributes inherited from Cop
#config, #corrections, #offenses, #processed_source
Instance Method Summary collapse
Methods included from AutocorrectUnlessChangingAST
Methods inherited from Cop
#add_offense, all, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, cop_name_with_namespace, cop_type, #correct, #debug?, #display_cop_names?, #display_style_guide?, inherited, #initialize, #join_force?, lint?, #message, non_rails, qualified_cop_name, rails?, #relevant_file?, #style_guide_url
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, command?, comment_line?, const_name, directions, first_part_of_call_chain, lambda?, lambda_or_proc?, line_range, move_pos, numeric_range_size, on_node, operator?, parentheses?, proc?, range_with_surrounding_comma, range_with_surrounding_space, source_range, strip_quotes, within_node?
Methods included from PathUtil
hidden?, issue_deprecation_warning, match_path?, relative_path
Constructor Details
This class inherits a constructor from RuboCop::Cop::Cop
Instance Method Details
#on_block(node) ⇒ Object
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# File 'lib/rubocop/cop/style/lambda.rb', line 18 def on_block(node) # We're looking for # (block # (send nil :lambda) # ...) block_method, args, = *node return unless block_method == TARGET selector = block_method.loc.selector.source length = lambda_length(node) if selector != '->' && length == 1 add_offense_for_single_line(node, block_method.loc.expression, args) elsif selector == '->' && length > 1 add_offense(node, block_method.loc.expression, MULTI_MSG) end end |