bors c6007fdc70 Auto merge of #86853 - usbalbin:const_try, r=oli-obk
Constify ?-operator for Result and Option

Try to make `?`-operator usable in `const fn` with `Result` and `Option`, see #74935 . Note that the try-operator itself was constified in #87237.

TODO
* [x] Add tests for const T -> T conversions
* [x] cleanup commits
* [x] Remove `#![allow(incomplete_features)]`
* [?] Await decision in #86808 - I'm not sure
* [x] Await support for parsing `~const` in bootstrapping compiler
* [x] Tracking issue(s)? - #88674
2021-09-30 10:35:24 +00:00
..
2021-08-31 16:32:01 -07:00
2021-09-15 16:58:02 +02:00
2021-08-31 08:28:51 -07:00