std::scoped_allocator_adaptor<OuterAlloc,InnerAlloc...>::outermost, outermost-construct, outermost-destroy
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C++
Memory management library
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std::scoped_allocator_adaptor
| Member functions | ||||
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scoped_allocator_adaptor::outermost
scoped_allocator_adaptor::outermost-construct scoped_allocator_adaptor::outermost-destroy |
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| Non-member functions | ||||
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(until C++20)
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| Deduction guides(C++17) |
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template
<
class Alloc >
/* unspecified */ /*outermost*/ ( Alloc&& alloc = *this ) ; |
(1) | (exposition only*) |
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template
<
class T, class... Args
>
void /*outermost-construct*/ ( T* p, Args&&... args ) ; |
(2) | (exposition only*) |
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template
<
class T >
void /*outermost-destroy*/ ( T* p ) ; |
(3) | (exposition only*) |
These exposition-only helper member function templates are used in member functions construct() and destroy()
1) Obtains the outermost allocator of alloc.
- If the expression alloc.outer_allocator() is valid, returns
outermost(alloc.outer_allocator()) - Otherwise, returns alloc.
2,3) Constructs or destroys an object using the outermost allocator of *this.
Given the type
std::allocator_traits
<
std::remove_reference_t
<decltype(
outermost ())>> as outermost_traits
2) Equivalent to
outermost_traits::construct(
outermost
(
), p, std::forward
<Args>
(args)...)
;
3) Equivalent to
outermost_traits::destroy(
outermost (), p);
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 3116 | C++11 | the recursion condition for outermost was “allochas the member function outer_allocator()”
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changed to “the expression alloc.outer_allocator() is valid” |
See also
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[static]
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constructs an object in the allocated storage (function template) |
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[static]
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destructs an object stored in the allocated storage (function template) |