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