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Tracking issue for RFC 2632 ?const trait bound opt-out #67794
Description
This is the tracking issue for the ?const opt-out for trait bounds described in rust-lang/rfcs#2632. The primary tracking issue for that RFC is #67792. The feature gate for it is const_trait_bound_opt_out.
This RFC has not yet been accepted. It is being implemented on a provisional basis to evaluate the potential fallout.
cc #57563
Implementation steps:
- Implement (Implement
?constopt-out for trait bounds #68140) - Forbid
?constoutsideconst fnorimpl const Trait
Activity
[-]Tracking issue for RFC 2362, `?const` trait bound opt-out[/-][+]Tracking issue for RFC 2632 `?const` trait bound opt-out[/+]Rollup merge of rust-lang#67820 - ecstatic-morse:const-trait, r=oli-obk
Rollup merge of rust-lang#67820 - ecstatic-morse:const-trait, r=oli-obk
Rollup merge of rust-lang#67820 - ecstatic-morse:const-trait, r=oli-obk
Auto merge of #68140 - ecstatic-morse:const-trait-bound-opt-out, r=ol…
Rollup merge of rust-lang#68140 - ecstatic-morse:const-trait-bound-op…
clarfonthey commentedon Sep 1, 2021
From what I understand, this was recently changed to
~constbut none of the tilde-const PRs link back to this one, and the issue name/description should be updated?clarfonthey commentedon Sep 1, 2021
cc @oli-obk @fee1-dead since from what I understand you two know the most about this change
fee1-dead commentedon Sep 1, 2021
The opt-out is no longer needed. The previous scheme was:
And the current scheme is now:
This issue should be closed, but it can be reopened if somehow we decide to use
?constopt-out again.jplatte commentedon Sep 1, 2021
So where is
~consttracked then? #67792?oli-obk commentedon Sep 1, 2021
yea, const_trait_impl requires the opt in syntax, otherwise you can't write anything but trivial impls
clarfonthey commentedon Sep 1, 2021
So... is there no dedicated tracking issue for
~const, then?Mostly because I don't see any easy place someone can look to know what the new syntax means.
oli-obk commentedon Sep 1, 2021
I updated the const_trait_impl tracking issue to link to the latest RFC text