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Section: 20.4.3 [mem.poly.allocator.class] Status: C++20 Submitter: Casey Carter Opened: 2017-11-15 Last modified: 2021-02-25
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polymorphic_allocator can trivially support the allocator completeness requirements (18.104.22.168.2 [allocator.requirements.completeness]) just as does the default allocator. Doing so imposes no implementation burden, and enables pmr::forward_list, pmr::list, and pmr::vector to support incomplete types as do the non-pmr equivalents.
[2018-01; Priority set to 2 after mailing list discussion]
[2018-08-23 Batavia Issues processing]
Status to Tentatively Ready
[2018-11, Adopted in San Diego]
Wording relative to N4700.
Add a new paragraph in 20.4.3 [mem.poly.allocator.class] after para 1:
1 A specialization of class template pmr::polymorphic_allocator conforms to the Allocator requirements [...]