1 #ifndef _DEMETA_HPP 2 #define _DEMETA_HPP 3 /*------------------------------------------------------------------------- 4 * drawElements C++ Base Library 5 * ----------------------------- 6 * 7 * Copyright 2015 The Android Open Source Project 8 * 9 * Licensed under the Apache License, Version 2.0 (the "License"); 10 * you may not use this file except in compliance with the License. 11 * You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 * 21 *//*! 22 * \file 23 * \brief Metaprogramming tools 24 *//*--------------------------------------------------------------------*/ 25 26 #include "deDefs.hpp" 27 28 namespace de 29 { 30 namespace meta 31 { 32 33 template <typename T, bool Cond> 34 struct EnableIf { }; 35 36 template <typename T> 37 struct EnableIf<T, true> 38 { 39 typedef T Type; 40 }; 41 42 template <bool Cond> 43 struct Not 44 { 45 enum 46 { 47 Value = !Cond 48 }; 49 }; 50 51 template <typename A, typename B> 52 struct TypesSame 53 { 54 enum 55 { 56 Value = false 57 }; 58 }; 59 60 template <typename A> 61 struct TypesSame<A, A> 62 { 63 enum 64 { 65 Value = true 66 }; 67 }; 68 69 } // meta 70 } // de 71 72 #endif // _DEMETA_HPP 73
