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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# This cop checks for comparison of something with itself.
#
# @example
#
# # bad
#
# x.top >= x.top
class UselessComparison < Cop
MSG = 'Comparison of something with itself detected.'.freeze
OPS = %w[== === != < > <= >= <=>].freeze
def_node_matcher :useless_comparison?,
"(send $_match {:#{OPS.join(' :')}} $_match)"
def on_send(node)
return unless useless_comparison?(node)
add_offense(node, location: :selector)
end
end
end
end
end
Version data entries
6,792 entries across 6,786 versions & 25 rubygems