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std::pmr::p...c_allocator(3)   C++ Standard Libary  std::pmr::p...c_allocator(3)

NAME
     std::pmr::polymorphic_allocator::polymorphic_allocator - std::pmr::polymor-
     phic_allocator::polymorphic_allocator

Synopsis
	polymorphic_allocator() 				       noexcept;
     (1)
	polymorphic_allocator( const polymorphic_allocator& other )  =	default;
     (2)
	template<		    class		    U		       >
     (3)
	polymorphic_allocator( const polymorphic_allocator<U>& other ) noexcept;
	polymorphic_allocator(	     std::pmr::memory_resource*       r       );
     (4)

	Constructs a new polymorphic_allocator.

	1) Constructs a polymorphic_allocator using the return value of
	std::pmr::get_default_resource() as the underlying memory resource.
	2,3)  Constructs  a  polymorphic_allocator using other.resource() as the
     underlying
	memory resource.
	4) Constructs a polymorphic_allocator using r as the  underlying  memory
     resource.
	This  constructor  provides  an  implicit conversion from std::pmr::mem-
     ory_resource*.

Parameters
	other - another polymorphic_allocator to copy from
	r     - pointer to the memory resource to use. May not be null

Exceptions
	4) Throws nothing.

Notes
	Copying a container using a polymorphic_allocator will not call the  al-
     locator's copy
	constructor. Instead, the new container will use the return value of
	select_on_container_copy_construction  (a  default-constructed	polymor-
     phic_allocator)
	as its allocator.

See also
					      create a new polymorphic_allocator
     for use by
	select_on_container_copy_construction a container's copy constructor
					      (public member function)

http://cppreference.com 	   2024.06.10	    std::pmr::p...c_allocator(3)
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