P2035 Value Proposition: Allocator-Aware (AA) Software

[wg21bot]

P2035R0 Value Proposition: Allocator-Aware (AA) Software (Pablo Halpern, John Lakos)

[tituswinters]

Discussed in Prague as part of a LEWG discussion on allocator policy.

Do not add allocator support without implementation experience.
Unanimous consent.

Reaffirm that we support allocator awareness even for non-allocating types.
SF F N A SA
4 7 8 1 0

Reaffirm that we support pmr for non-template types that may need to store or propagate an allocator. (Prefer pmr over allocator type-erasure.)
SF F N A SA
4 2 8 4 1

Endorse a policy that class templates that are not type-erased have a counterpart basic_ template with the allocator template parameter.
SF F N A SA
3 5 10 1 1