86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
/*-
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* Copyright 2012 Matthew Endsley
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* All rights reserved
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted providing that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TINYSTL_TRAITS_H
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#define TINYSTL_TRAITS_H
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#include "new.h"
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#if defined(__GNUC__) && defined(__is_pod)
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# define TINYSTL_TRY_POD_OPTIMIZATION(t) __is_pod(t)
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#elif defined(_MSC_VER)
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# define TINYSTL_TRY_POD_OPTIMIZATION(t) (!__is_class(t) || __is_pod(t))
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#else
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# define TINYSTL_TRY_POD_OPTIMIZATION(t) false
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#endif
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namespace tinystl {
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template<typename T, bool pod = TINYSTL_TRY_POD_OPTIMIZATION(T)> struct pod_traits {};
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template<typename T, T t> struct swap_holder;
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template<typename T>
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static inline void move_impl(T& a, T& b, ...) {
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a = b;
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}
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template<typename T>
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static inline void move_impl(T& a, T& b, T*, swap_holder<void (T::*)(T&), &T::swap>* = 0) {
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a.swap(b);
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}
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template<typename T>
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static inline void move(T& a, T&b) {
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move_impl(a, b, (T*)0);
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}
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template<typename T>
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static inline void move_construct_impl(T* a, T& b, ...) {
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new(placeholder(), a) T(b);
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}
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template<typename T>
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static inline void move_construct_impl(T* a, T& b, void*, swap_holder<void (T::*)(T&), &T::swap>* = 0) {
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// If your type T does not have a default constructor, simply insert:
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// struct tinystl_nomove_construct;
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// in the class definition
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new(placeholder(), a) T;
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a->swap(b);
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}
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template<typename T>
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static inline void move_construct_impl(T* a, T& b, T*, typename T::tinystl_nomove_construct* = 0) {
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new(placeholder(), a) T(b);
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}
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template<typename T>
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static inline void move_construct(T* a, T& b) {
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move_construct_impl(a, b, (T*)0);
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}
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}
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#endif
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