20 General utilities library [utilities]

20.12 Memory resources [mem.res]

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

20.12.3.3 Equality [mem.poly.allocator.eq]

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template<class T1, class T2> bool operator==(const polymorphic_allocator<T1>& a, const polymorphic_allocator<T2>& b) noexcept;
1
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Returns: *a.resource() == *b.resource().