23 General utilities library [utilities]

23.12 Memory resources [mem.res]

23.12.3 Class template polymorphic_­allocator [mem.poly.allocator.class]

23.12.3.1 polymorphic_­allocator constructors [mem.poly.allocator.ctor]

polymorphic_allocator() noexcept;

1
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Effects: Sets memory_­rsrc to get_­default_­resource().

polymorphic_allocator(memory_resource* r);

2
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Requires: r is non-null.

3
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Effects: Sets memory_­rsrc to r.

4
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Throws: Nothing.

5
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[ Note: This constructor provides an implicit conversion from memory_­resource*.  — end note ]

template <class U> polymorphic_allocator(const polymorphic_allocator<U>& other) noexcept;

6
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Effects: Sets memory_­rsrc to other.resource().