50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Copyright 2015 Danny Robson <danny@nerdcruft.net>
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*/
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#ifndef __UTIL_STRONGDEF_HPP
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#define __UTIL_STRONGDEF_HPP
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namespace util {
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/// A transparent wrapper around a (typically lightweight) type for the
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/// purposes of overload disambiguation. It acts like a typesafe typedef.
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template <typename T>
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struct strongdef {
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public:
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using value_type = T;
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constexpr strongdef () = default;
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constexpr explicit strongdef (T _data):
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data (_data)
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{ ; }
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strongdef& operator= (const strongdef &rhs)
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{ data = rhs.data; return *this; }
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strongdef& operator= (const T &rhs)
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{ data = rhs; return *this; }
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operator const T& (void) const { return data; }
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operator T& (void) { return data; }
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bool operator== (const strongdef &rhs) const
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{ return data == rhs.data; }
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T data;
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};
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}
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#endif
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