Allocators 1.0

[nxsaken]

Metadata
Point of contact	@nia-e
Team(s)	compiler, lang, libs, types
Goal document	2026/allocators-1.0

Summary

Work on expanding the standard library to natively integrate with custom allocators, while facilitating key ecosystem usecases for implementors and consumers.

Tasks and status

[nxsaken]

This issue is intended for status updates only.

For general questions or comments, please contact the owner(s) directly.

[nia-e]

Current status is that the main Allocator trait stabilisation PR is virtually ready, awaiting FCP (rust-lang/rust#156882). Proposals for a split Deallocator trait are likely also going to be unblocked very soon thanks to supertrait item shadowing getting stabilised, and once that's merged a prototype implementation should be trivial.