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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# 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
# )
class TrailingCommaInArguments < Cop
include TrailingComma
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
def avoid_autocorrect?(args)
hash_with_braces?(args.last) && braces_will_be_removed?(args)
end
def hash_with_braces?(node)
node.hash_type? && node.loc.begin
end
# Returns true if running with --auto-correct would remove the braces
# of the last argument.
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
end
end
end
end
Version data entries
11 entries across 11 versions & 2 rubygems