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Size: 828 Bytes
Versions: 9
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Stored size: 828 Bytes
Contents
# encoding: utf-8
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.'
OPS = [:==, :===]
NIL_NODE = s(:nil)
def on_send(node)
_receiver, method, args = *node
return unless OPS.include?(method)
add_offense(node, :selector) if args == NIL_NODE
end
private
def autocorrect(node)
expr = node.loc.expression
new_code = expr.source.sub(/\s*={2,3}\s*nil/, '.nil?')
->(corrector) { corrector.replace(expr, new_code) }
end
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems