amxmodx/public/amtl/am-moveable.h

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2014-05-03 11:00:21 +00:00
// vim: set sts=8 ts=2 sw=2 tw=99 et:
//
// Copyright (C) 2013, David Anderson and AlliedModders LLC
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of AlliedModders LLC nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
#ifndef _include_amtl_moveable_h_
#define _include_amtl_moveable_h_
namespace ke {
// This is a feature in C++11, but since AM projects do not have access to
// C++11 yet, we provide templates to implement move semantics. A class can
// provide a constructor for (ke::Moveable<T> t) which containers will try
// to use.
//
// When implementing a constructor that takes a Moveable, the object being
// moved should be left in a state that is safe, since its destructor will
// be called even though it has been moved.
template <typename T>
struct Moveable
{
public:
explicit Moveable(T &t)
: t_(t)
{
}
T *operator ->() {
return &t_;
}
operator T &() {
return t_;
}
private:
T &t_;
};
template <typename T>
static inline Moveable<T>
Move(T &t)
{
return Moveable<T>(t);
}
} // namespace ke
#endif // _include_amtl_moveable_h_