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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# This cop checks for trailing commas in attribute declarations, such as
# `#attr_reader`. Leaving a trailing comma will nullify the next method
# definition by overriding it with a getter method.
#
# @example
#
# # bad
# class Foo
# attr_reader :foo,
#
# def bar
# puts "Unreachable."
# end
# end
#
# # good
# class Foo
# attr_reader :foo
#
# def bar
# puts "No problem!"
# end
# end
#
class TrailingCommaInAttributeDeclaration < Base
extend AutoCorrector
include RangeHelp
MSG = 'Avoid leaving a trailing comma in attribute declarations.'
def on_send(node)
return unless node.attribute_accessor? && node.arguments.last.def_type?
trailing_comma = trailing_comma_range(node)
add_offense(trailing_comma) { |corrector| corrector.remove(trailing_comma) }
end
private
def trailing_comma_range(node)
range_with_surrounding_space(
range: node.arguments[-2].source_range,
side: :right
).end.resize(1)
end
end
end
end
end
Version data entries
38 entries across 38 versions & 6 rubygems