std::swap

 

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Defined in header <algorithm> Defined in header <utility>		（直到C + +11） （因为C + +11）
template< class T > void swap( T& a, T& b );	(1)
template< class T2, size_t N > void swap( T2 (&a)[N], T2 (&b)[N]);	(2)	（因为C + +11）

交易给定的值.

Original:

Exchanges the given values.

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1)

交换价值a和b.

Original:

Swaps the values a and b.

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2)

交换阵列ab。实际上调用std::swap_ranges(a, a+N, b).

Original:

Swaps the arrays a and b. In effect calls std::swap_ranges(a, a+N, b).

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参数

a, b	-	的值，以进行交换 Original: the values to be swapped The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
Type requirements
- T must meet the requirements of MoveAssignable and MoveConstructible.
- T2 must meet the requirements of Swappable.

返回值

（无）

Original:

(none)

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例外

1)

noexcept specification:  （因为C + +11）

noexcept(noexcept(     std::is_nothrow_move_constructible<T>::value &&     std::is_nothrow_move_assignable<T>::value ))

2)

noexcept specification:  （因为C + +11）

noexcept(noexcept(swap(*a, *b)))

复杂性

1)

常数

Original:

Constant

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2)

线性N

Original:

Linear in N

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专业化

这两个自定义专业的std::swap算法和过载是允许的，但一般的重载函数模板的专业首选，因为是不允许的模板类。库函数时，总是使用用户提供的重载交换，如果他们被发现的参数相关的查找（每Swappable概念），.

Original:

Both custom specializations and overloads of the std::swap algorithm are allowed, but the overloads are generally preferred since specializations of a function template aren't allowed for template classes. Library functions always use the user-provided overloads when swapping, if they are found by argument-dependent lookup (as per Swappable concept).

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以下重载已经提供的标准库

Original:

The following overloads are already provided by the standard library:

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std::swap(std::pair) （C++11）	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::tuple) （C++11）	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::shared_ptr) （C++11）	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::weak_ptr) （C++11）	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::unique_ptr) （C++11）	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::function) （C++11）	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::basic_string)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::array)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::deque)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::forward_list)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::list)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::vector)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::map)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::multimap)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::set)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::multiset)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::unordered_map)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::unordered_multimap)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::unordered_set)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::unordered_multiset)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::queue)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::priority_queue)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::stack)	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::valarray) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::basic_stringbuf) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::basic_istringstream) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::basic_ostringstream) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::basic_stringstream) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::basic_filebuf) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::basic_ifstream) （C++11）	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::basic_ofstream) （C++11）	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::basic_fstream) （C++11）	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::basic_regex) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::match_results) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::thread) （C++11）	专业的std::swap算法 Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::unique_lock) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::promise) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
std::swap(std::packaged_task) （C++11）	专业的std::swap()算法 Original: specializes the std::swap() algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）

另请参阅

iter_swap	掉期两个迭代器所指向的元素 Original: swaps the elements pointed to by two iterators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）
swap_ranges	交换两个范围的元素 Original: swaps two ranges of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数模板）