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Contents
#
# Copyright 2014-2018 Chef Software, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
module Omnibus
module NullArgumentable
#
# The "empty" null object.
#
# @return [Object]
#
NULL = Object.new.freeze
#
# Called when the module is included.
#
# @param [Object] base
#
def self.included(base)
base.extend(ClassMethods)
end
module ClassMethods
#
# Check if the given object is null.
#
# @return [true, false]
#
def null?(object)
object.equal?(NULL)
end
end
# @see (NullArgumentable.null?)
def null?(object)
self.class.null?(object)
end
end
end
Version data entries
22 entries across 22 versions & 1 rubygems