polymorphic_allocator() noexcept; | (1) | |
polymorphic_allocator( const polymorphic_allocator& other ) = default; | (2) | |
template< class U > polymorphic_allocator( const polymorphic_allocator<U>& other ) noexcept; | (3) | |
polymorphic_allocator( std::pmr::memory_resource* r ); | (4) |
Constructs a new polymorphic_allocator.
polymorphic_allocator using the return value of std::pmr::get_default_resource() as the underlying memory resource.polymorphic_allocator using other.resource() as the underlying memory resource.polymorphic_allocator using r as the underlying memory resource. This constructor provides an implicit conversion from std::pmr::memory_resource*.| other | - | another polymorphic_allocator to copy from |
| r | - | pointer to the memory resource to use. May not be null. |
Copying a container using a polymorphic_allocator will not call the allocator's copy constructor. Instead, the new container will use the return value of select_on_container_copy_construction (a default-constructed polymorphic_allocator) as its allocator.
Create a new polymorphic_allocator for use by a container's copy constructor (public member function) |
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