std::swap

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Defined in header <algorithm>
Defined in header <utility>

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Template:mark pre c++11 version
Template:mark c++11 version

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template< class T >
void swap( T& a, T& b );

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template< class T, size_t N >
void swap( T (&a)[N], T (&b)[N]);

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<td > (2) </td> <td > Template:mark c++11 feature </td> </tr> Template:ddcl list end

Exchanges the given values.

1) Swaps the values a and b.

2) Swaps the arrays a and b. In effect calls Template:cpp.

Parameters

a, b

-

the values to be swapped

Exceptions

1)

noexcept specification:  

noexcept(noexcept(

    std::is_nothrow_move_constructible<T>::value &&
    std::is_nothrow_move_assignable<T>::value

))

2)

noexcept specification:  

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

Complexity

Constant

Specializations

Custom specializations of the Template:cpp algorithm are allowed. The following specializations are already provided by the standard library:

Template:cpp/utility/pair/dcl list std swapTemplate:cpp/utility/tuple/dcl list std swapTemplate:cpp/memory/shared ptr/dcl list std swapTemplate:cpp/memory/unique ptr/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/container/dcl list std swapTemplate:cpp/thread/thread/dcl list std swap

std::swap(std::weak_ptr) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::function) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::basic_string)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::valarray) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::basic_stringbuf) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::basic_istringstream) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::basic_ostringstream) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::basic_stringstream) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::basic_filebuf) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::basic_ifstream) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::basic_ofstream) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::basic_fstream) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::basic_regex) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::match_results) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::unique_lock) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::promise) (C++11)	specializes the Template:cpp/ltf algorithm (function template)
std::swap(std::packaged_task) (C++11)	specializes the Template:cpp/ltf algorithm (function template)

See also

Template:cpp/algorithm/dcl list iter swapTemplate:cpp/algorithm/dcl list swap ranges