This is not “reintroducing” register! The register keyword did something different than what you are suggesting. And I believe it is still part of the C standard (or did this change?). It would not make sense to use the same keyword as in C, but to mean something entirely different.

On Sep 21, 2026, at 2:08 PM, Liam Graham via Std-Proposals <std-proposals@lists.isocpp.org> wrote:

Treat it like a storage class, not as a compiler hint

Or perhaps

Register int X[0] where [N] is the register file index. The issue is calling conventions. But allow the developer to shoot themselves in the foot if they choose.

#pragma register(RAX)

[[register:RAX]]

Etc etc

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