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Versions: 15
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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Style
# This cop checks for comparison of something with nil using ==.
#
# @example
#
# # bad
# if x == nil
#
# # good
# if x.nil?
class NilComparison < Cop
MSG = 'Prefer the use of the `nil?` predicate.'.freeze
def_node_matcher :nil_comparison?, '(send _ {:== :===} (:nil))'
def on_send(node)
nil_comparison?(node) do
add_offense(node, :selector)
end
end
private
def autocorrect(node)
new_code = node.source.sub(/\s*={2,3}\s*nil/, '.nil?')
->(corrector) { corrector.replace(node.source_range, new_code) }
end
end
end
end
end
Version data entries
15 entries across 15 versions & 2 rubygems