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COMMON: Add type traits to common library

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Type traits allow conditional selection and manipulation of types
during compilation.
This commit is contained in:
Colin Snover 2016-12-19 10:01:33 -06:00
parent 4dc6aa2d93
commit ff1c2295ab
1 changed files with 34 additions and 0 deletions
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common/type-traits.h Normal file
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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef COMMON_TYPE_TRAITS_H
#define COMMON_TYPE_TRAITS_H
namespace Common {
template <bool b, class T, class U> struct Conditional { typedef T type; };
template <class T, class U> struct Conditional<false, T, U> { typedef U type; };
template <typename T> struct RemoveConst { typedef T type; };
template <typename T> struct RemoveConst<const T> { typedef T type; };
template <typename T> struct AddConst { typedef const T type; };
} // End of namespace Common
#endif