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140 lines
2.7 KiB
C++
140 lines
2.7 KiB
C++
/*
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* All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
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* its licensors.
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*
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* For complete copyright and license terms please see the LICENSE at the root of this
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* distribution (the "License"). All use of this software is governed by the License,
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* or, if provided, by the license below or the license accompanying this file. Do not
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* remove or modify any license notices. This file 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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*
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*/
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// Original file Copyright Crytek GMBH or its affiliates, used under license.
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#ifndef CRYINCLUDE_CRYCOMMON_METAUTILS_H
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#define CRYINCLUDE_CRYCOMMON_METAUTILS_H
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#pragma once
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namespace metautils
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{
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// select
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template<bool Condition, typename Ty1, typename Ty2>
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struct select;
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template<typename Ty1, typename Ty2>
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struct select<true, Ty1, Ty2>
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{
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typedef Ty1 type;
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};
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template<typename Ty1, typename Ty2>
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struct select<false, Ty1, Ty2>
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{
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typedef Ty2 type;
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};
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// is_same
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// Identifies whether types Ty1 and Ty2 are the same including const & volatile.
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template<typename Ty1, typename Ty2>
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struct is_same;
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template<typename Ty1>
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struct is_same<Ty1, Ty1>
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{
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enum
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{
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value = true,
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};
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};
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template<typename Ty1, typename Ty2>
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struct is_same
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{
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enum
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{
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value = false,
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};
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};
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// remove_const
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// Removes top level const qualifier.
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template<class Ty>
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struct remove_const
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{
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typedef Ty type;
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};
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template<class Ty>
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struct remove_const<const Ty>
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{
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typedef Ty type;
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};
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template<class Ty>
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struct remove_const<const Ty[]>
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{
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typedef Ty type[];
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};
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template<class Ty, unsigned int N>
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struct remove_const<const Ty[N]>
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{
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typedef Ty type[N];
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};
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// is_const
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// Determines whether type Ty is const qualified.
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template <typename Ty>
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struct is_const
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{
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enum
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{
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value = false
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};
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};
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template <typename Ty>
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struct is_const<const Ty>
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{
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enum
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{
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value = true
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};
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};
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template<class Ty, unsigned int N>
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struct is_const<Ty[N]>
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{
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enum
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{
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value = false
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};
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};
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template<class Ty, unsigned int N>
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struct is_const<const Ty[N]>
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{
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enum
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{
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value = true
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};
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};
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template<class Ty>
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struct is_const<Ty&>
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{
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enum
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{
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value = false
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};
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};
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};
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#endif // CRYINCLUDE_CRYCOMMON_METAUTILS_H
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