[P1518R2](https://wg21.link/P1518R2) Stop Overconstraining Allocators In Container Deduction Guides No feature-test macro is mentioned (as CTAD can simply be avoided when support is uncertain).
P1518R2 Stop Overconstraining Allocators In Container Deduction Guides
No feature-test macro is mentioned (as CTAD can simply be avoided when support is uncertain).