class RuboCop::Cop::Style::TrailingCommaInArguments
This cop checks for trailing comma in argument lists.
@example
# always bad method(1, 2,) # good if EnforcedStyleForMultiline is consistent_comma method( 1, 2, 3, ) # good if EnforcedStyleForMultiline is comma or consistent_comma method( 1, 2, ) # good if EnforcedStyleForMultiline is no_comma method( 1, 2 )
Public Instance Methods
on_send(node)
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# File lib/rubocop/cop/style/trailing_comma_in_arguments.rb, line 32 def on_send(node) _receiver, _method_name, *args = *node return if args.empty? # It's impossible for a method call without parentheses to have # a trailing comma. return unless brackets?(node) check(node, args, 'parameter of %s method call', args.last.source_range.end_pos, node.source_range.end_pos) end
Private Instance Methods
avoid_autocorrect?(args)
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# File lib/rubocop/cop/style/trailing_comma_in_arguments.rb, line 45 def avoid_autocorrect?(args) hash_with_braces?(args.last) && braces_will_be_removed?(args) end
braces_will_be_removed?(args)
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Returns true if running with –auto-correct would remove the braces of the last argument.
# File lib/rubocop/cop/style/trailing_comma_in_arguments.rb, line 55 def braces_will_be_removed?(args) brace_config = config.for_cop('Style/BracesAroundHashParameters') return false unless brace_config['Enabled'] return false if brace_config['AutoCorrect'] == false brace_style = brace_config['EnforcedStyle'] return true if brace_style == 'no_braces' return false unless brace_style == 'context_dependent' args.size == 1 || !args[-2].hash_type? end
hash_with_braces?(node)
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# File lib/rubocop/cop/style/trailing_comma_in_arguments.rb, line 49 def hash_with_braces?(node) node.hash_type? && node.loc.begin end