std::polymorphic<T, Allocator>::swap
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constexpr void swap( polymorphic& other ) noexcept(/* see below */);
(since C++26)
Swaps the contents with those of other.
In the description below, swap_allocators refers to std::allocator_traits <Allocator>::propagate_on_container_swap::value.
Swaps the states of *this and other, exchanging owned objects or valueless states.
- If swap_allocators is true, then executes using std::swap ;
swap(alloc, other.alloc);. - Otherwise, the allocators are not swapped.
If one of the following conditions is satisfied, the behavior is undefined:
- swap_allocators is true, and
Allocatordoes not satisfy the requirements of Swappable. - swap_allocators is false, and get_allocator() == other.get_allocator() is false.
Contents
[edit] Parameters
other
-
the
polymorphic object to exchange the contents with
[edit] Exceptions
noexcept specification:
noexcept(std::allocator_traits <Allocator>::propagate_on_container_swap::value
|| std::allocator_traits <Allocator>::is_always_equal::value)
|| std::allocator_traits <Allocator>::is_always_equal::value)
[edit] Example
This section is incomplete
Reason: no example
Reason: no example