std::experimental::propagate_const<T>::swap

 

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Technical specifications

Filesystem library (filesystem TS)

Library fundamentals (library fundamentals TS)

Library fundamentals 2 (library fundamentals TS v2)

Library fundamentals 3 (library fundamentals TS v3)

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Extensions for parallelism 2 (parallelism TS v2)

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Extensions for concurrency 2 (concurrency TS v2)

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Library fundamentals v2

experimental::propagate_const

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std::experimental::propagate_const

Member functions

propagate_const::propagate_const

propagate_const::operator=

propagate_const::swap

Observers

propagate_const::get

propagate_const::operator bool

propagate_const::operator*propagate_const::operator->

propagate_const::operator element_type*propagate_const::operator const element_type*

Non-member functions

operator==operator!=operator<operator>operator<=operator>operator>=

swap

get_underlying

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std::hash

std::equal_tostd::not_equal_tostd::lessstd::greaterstd::less_equalstd::greater_equal

 

constexpr void swap(propagate_const & pt) noexcept(/* see below */);		(library fundamentals TS v2)

Swaps the wrapped pointer with that of pt. Let t_ designate the private data member that is the wrapped pointer-like object, then this function is equivalent to swap(t_, pt.t_), where the overload resolution for swap is performed among std::swap and any declaration found by the usual lookup rules, as described in Swappable.

The behavior is undefined if lvalues of T do not satisfy Swappable.

Parameters

pt

-

another propagate_const object to swap with

Exceptions

noexcept specification:   noexcept(noexcept(swap(t_, pt.t_))) The lookup for the identifier swap in the exception specification finds overloads described above, and does not find the member function itself, making the exception specification equivalent to C++17 std::is_nothrow_swappable.	(library fundamentals TS v2)
noexcept specification:   noexcept(std::is_nothrow_swappable_v<T>)	(library fundamentals TS v3)

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 3413	LFTSv2	the exception specification was ill-formed	made well-formed