C++17: compiler support for pmr namespace classes

Question

I want to experiment with pmr::memory_resource for dynamic memory pooling.

This page and this page purport to list C++17 features and indicate compiler support for each. However, I do not find pmr, memory_resource or polymorphic_allocator listed here.

Also, what is the most recent proposal on these proposed features? I found this revised proposal from early 2014. Is that the latest?

Answer 1

Polymorphic allocator belonging to the pmr namespace are not compiler features; they're new standard library features. You should refer to these pages:

• "libstdc++ C++1z status"

• "libc++ C++1z status"

Note that polymorphic memory resources and polymorphic allocators are part of the "Library Fundamentals V1 TS Components for C++17".

• libstdc++ supports it as part of GCC 9.1

• libc++ support is marked as "in progress"