Sha256: f9c1cb9d1c088292d9765e8529f2b268bebb7da0ddabdb03bb6b8307d0e1b31e
Contents?: true
Size: 780 Bytes
Versions: 11
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Stored size: 780 Bytes
Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Lint
# This cop checks for `rand(1)` calls.
# Such calls always return `0`.
#
# @example
#
# @bad
# rand 1
# Kernel.rand(-1)
# rand 1.0
# rand(-1.0)
#
# @good
# 0
class RandOne < Cop
MSG = '`%s` always returns `0`. ' \
'Perhaps you meant `rand(2)` or `rand`?'.freeze
def_node_matcher :rand_one?, <<-PATTERN
(send {(const nil :Kernel) nil} :rand {(int {-1 1}) (float {-1.0 1.0})})
PATTERN
def on_send(node)
return unless rand_one?(node)
add_offense(node, :expression, format(MSG, node.source))
end
end
end
end
end
Version data entries
11 entries across 11 versions & 2 rubygems