std::experimental::pmr::polymorphic_allocator::polymorphic_allocator

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

Constructs a new polymorphic_allocator.

1) Constructs a polymorphic_allocator using the return value of std::experimental::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 memory_resource*.

Parameters

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

Exceptions

1,3)
noexcept specification:  
noexcept
  
4) Throws nothing.