Matthias Krüger
cfc5f25b3d
Rollup merge of #127054 - compiler-errors:bound-ordering, r=fmease
...
Reorder trait bound modifiers *after* `for<...>` binder in trait bounds
This PR suggests changing the grammar of trait bounds from:
```
[CONSTNESS] [ASYNCNESS] [?] [BINDER] [TRAIT_PATH]
const async ? for<'a> Sized
```
to
```
([BINDER] [CONSTNESS] [ASYNCNESS] | [?]) [TRAIT_PATH]
```
i.e., either
```
? Sized
```
or
```
for<'a> const async Sized
```
(but not both)
### Why?
I think it's strange that the binder applies "more tightly" than the `?` trait polarity. This becomes even weirder when considering that we (or at least, I) want to have `async` trait bounds expressed like:
```
where T: for<'a> async Fn(&'a ()) -> i32,
```
and not:
```
where T: async for<'a> Fn(&'a ()) -> i32,
```
### Fallout
No crates on crater use this syntax, presumably because it's literally useless. This will require modifying the reference grammar, though.
### Alternatives
If this is not desirable, then we can alternatively keep parsing `for<'a>` after the `?` but deprecate it with either an FCW (or an immediate hard error), and begin parsing `for<'a>` *before* the `?`.
2024-07-25 04:43:18 +02:00
..
2024-07-11 06:59:10 +00:00
2024-07-25 04:43:18 +02:00
2024-02-16 20:02:50 +00:00
2024-07-12 03:02:58 +00:00
2024-02-16 20:02:50 +00:00
2024-03-25 08:01:15 -07:00
2024-07-17 19:08:37 +08:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2024-07-18 08:09:01 +02:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2024-02-17 13:59:45 +01:00
2024-02-16 20:02:50 +00:00
2024-03-19 12:02:21 -04:00
2024-02-16 20:02:50 +00:00
2024-05-07 16:56:54 -04:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-06-27 15:19:08 -04:00
2024-04-10 13:39:53 -04:00
2024-04-10 13:39:53 -04:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-05-29 12:57:01 +03:00
2024-04-16 20:45:07 +03:00
2024-02-16 20:02:50 +00:00
2024-03-03 18:53:35 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-05-21 19:05:37 -07:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2024-02-27 03:20:10 +00:00
2024-04-24 08:05:29 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-01-05 10:00:59 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-05-21 19:05:37 -07:00
2024-02-16 20:02:50 +00:00
2024-06-27 15:19:08 -04:00
2024-04-24 08:05:29 +00:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-04-11 11:56:47 -04:00
2024-05-20 20:16:29 -04:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-10-05 01:04:41 +00:00
2024-02-16 20:02:50 +00:00
2023-10-13 21:01:36 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-01-13 12:46:58 -05:00
2024-02-16 20:02:50 +00:00
2024-01-13 12:46:58 -05:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-12-22 11:01:07 -08:00
2024-02-18 23:20:05 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-04-30 22:27:19 +02:00
2024-04-30 22:27:19 +02:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-18 00:40:11 +00:00
2024-02-16 20:02:50 +00:00
2024-07-04 02:02:21 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-02-09 15:43:08 -03:00
2024-02-09 15:43:08 -03:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-04-30 22:27:19 +02:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-28 19:29:56 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 04:28:05 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2023-11-24 19:15:52 +01:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-04-27 17:18:11 +00:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-12 20:26:34 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-01-08 20:30:24 +00:00
2024-02-16 20:02:50 +00:00
2024-06-04 14:19:42 -03:00
2024-06-04 14:19:42 -03:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-10-27 18:29:43 +00:00
2024-04-24 08:05:29 +00:00
2024-03-10 21:18:41 -04:00
2024-03-19 12:02:21 -04:00
2024-03-19 12:02:21 -04:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-05-28 20:05:01 +00:00
2024-05-28 20:48:35 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-01-08 20:30:24 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-03-19 11:30:12 -04:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-06-24 16:20:22 -05:00
2024-06-24 16:20:22 -05:00
2024-02-17 16:49:01 +01:00
2023-11-16 17:00:23 +00:00
2023-11-16 17:00:23 +00:00
2023-11-16 17:00:23 +00:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-06-27 15:19:08 -04:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2024-01-30 21:28:18 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00
2023-11-24 19:15:52 +01:00
2024-02-16 20:02:50 +00:00