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72 Commits

Author SHA1 Message Date
Oli Scherer
e4c9a8cf9b Const generic parameters aren't bounds, even if we end up erroring because of the bound that binds the parameter's type 2024-06-19 14:58:29 +00:00
Michael Goulet
4b188d9d66 Only compute specializes query if specialization is enabled in the crate of the specialized impl 2024-06-07 15:58:50 -04:00
Michael Goulet
1653a2d34a Failing test 2024-06-07 14:59:38 -04:00
Matthias Krüger
e1745122ae
Rollup merge of #125792 - compiler-errors:dont-drop-upcast-cand, r=lcnr 
Don't drop `Unsize` candidate in intercrate mode

Fixes #125767
 2024-06-05 18:21:09 +02:00
Michael Goulet
20699fe6b2 Stop using translate_args in the new solver 2024-05-31 09:42:30 -04:00
Matthias Krüger
ab55d42b74
Rollup merge of #125786 - compiler-errors:fold-item-bounds, r=lcnr 
Fold item bounds before proving them in `check_type_bounds` in new solver

Vaguely confident that this is sufficient to prevent rust-lang/trait-system-refactor-initiative#46 and rust-lang/trait-system-refactor-initiative#62.

This is not the "correct" solution, but will probably suffice until coinduction, at which point we implement the right solution (`check_type_bounds` must prove `Assoc<...> alias-eq ConcreteType`, normalizing requires proving item bounds).

r? lcnr
 2024-05-31 08:50:23 +02:00
r0cky
ed5205fe66 Avoid unwrap diag.code directly 2024-05-31 08:29:42 +08:00
Michael Goulet
e485b193d0 Don't drop Upcast candidate in intercrate mode 2024-05-30 19:45:59 -04:00
Michael Goulet
2f4b7dc047 Fold item bound before checking that they hold 2024-05-30 15:52:29 -04:00
Boxy
d5bd4e233d Partially implement ConstArgHasType 2024-05-29 17:06:54 +01:00
Oli Scherer
9dc76207ff Fail relating constants of different types 2024-05-24 09:15:43 +00:00
lcnr
da969d41a3 fix NormalizesTo proof tree issue 2024-04-30 20:03:33 +00:00
Gurinder Singh
c30e15aded Fail candidate assembly for erroneous types 
Trait predicates for types which have errors may still
evaluate to OK leading to downstream ICEs. Now we return
a selection error for such types in candidate assembly and
thereby prevent such issues
 2024-04-16 12:42:48 +05:30
Oli Scherer
b8bd981545 Specialization already rejects defining opaque types 2024-04-04 10:01:45 +00:00
Michael Goulet
b8396d10c4 Always make inductive cycles as ambig during typeck 2024-03-31 20:44:30 -04:00
Matthias Krüger
877f29363d
Rollup merge of #122988 - matthiaskrgr:icetests, r=petrochenkov 
add even more tests!

Fixes https://github.com/rust-lang/rust/issues/109869
Fixes https://github.com/rust-lang/rust/issues/110453
Fixes https://github.com/rust-lang/rust/issues/109020
Fixes https://github.com/rust-lang/rust/issues/108580
Fixes https://github.com/rust-lang/rust/issues/108220
Fixes https://github.com/rust-lang/rust/issues/113045
Fixes https://github.com/rust-lang/rust/issues/113133
Fixes https://github.com/rust-lang/rust/issues/114464
Fixes https://github.com/rust-lang/rust/issues/116599
Fixes https://github.com/rust-lang/rust/issues/119731
 2024-03-25 17:05:34 +01:00
bors
dda2372cf3 Auto merge of #122802 - estebank:unconstrained-generic-const, r=Nadrieril 
Provide structured suggestion for unconstrained generic constant

```
error: unconstrained generic constant
  --> $DIR/const-argument-if-length.rs:18:10
   |
LL |     pad: [u8; is_zst::<T>()],
   |          ^^^^^^^^^^^^^^^^^^^
   |
help: try adding a `where` bound
   |
LL | pub struct AtLeastByte<T: ?Sized> where [(); is_zst::<T>()]: {
   |                                   ++++++++++++++++++++++++++
```

Detect when the constant expression isn't `usize` and suggest casting:

```
error: unconstrained generic constant
 --> f300.rs:6:10
  |
6 |     bb::<{!N}>();
  |          ^^^^
-Ztrack-diagnostics: created at compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs:3539:36
  |
help: try adding a `where` bound
  |
5 | fn b<const N: bool>() where [(); {!N} as usize]: {
  |                       ++++++++++++++++++++++++++
```

Fix #122395.
 2024-03-25 09:59:37 +00:00
Matthias Krüger
b151e06659 add test for ICE: min_specialization: Ok(['?0, Const { ty: usize, kind: Leaf(0x0000000000000000) }]) is not fully resolved #113045 
Fixes https://github.com/rust-lang/rust/issues/113045
 2024-03-24 10:19:25 +01:00
Matthias Krüger
368bfb2c10 add test for #107228 
Fixes #107228
 2024-03-23 13:05:22 +01:00
Esteban Küber
6b24fdf811 Provide structured suggestion for unconstrained generic constant 
```
error: unconstrained generic constant
  --> $DIR/const-argument-if-length.rs:18:10
   |
LL |     pad: [u8; is_zst::<T>()],
   |          ^^^^^^^^^^^^^^^^^^^
   |
help: try adding a `where` bound
   |
LL | pub struct AtLeastByte<T: ?Sized> where [(); is_zst::<T>()]: {
   |                                   ++++++++++++++++++++++++++
```

Detect when the constant expression isn't `usize` and suggest casting:

```
error: unconstrained generic constant
 --> f300.rs:6:10
  |
6 |     bb::<{!N}>();
  |          ^^^^
-Ztrack-diagnostics: created at compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs:3539:36
  |
help: try adding a `where` bound
  |
5 | fn b<const N: bool>() where [(); {!N} as usize]: {
  |                       ++++++++++++++++++++++++++
```

Fix #122395.
 2024-03-21 00:03:59 +00:00
Esteban Küber
6c31f6ce12 Provide structured suggestion for #![feature(foo)] 
```
error: `S2<'_>` is forbidden as the type of a const generic parameter
  --> $DIR/lifetime-in-const-param.rs:5:23
   |
LL | struct S<'a, const N: S2>(&'a ());
   |                       ^^
   |
   = note: the only supported types are integers, `bool` and `char`
help: add `#![feature(adt_const_params)]` to the crate attributes to enable more complex and user defined types
   |
LL + #![feature(adt_const_params)]
   |
```

Fix #55941.
 2024-03-18 16:08:58 +00:00
许杰友 Jieyou Xu (Joe)
ec2cc761bc
[AUTO-GENERATED] Migrate ui tests from // to //@ directives 2024-02-16 20:02:50 +00:00
Oli Scherer
5f6390f947 Continue compilation after check_mod_type_wf errors 2024-02-14 11:00:30 +00:00
Michael Goulet
b4eee2e8b3 Do not assemble candidates for default impls 2024-02-13 19:20:13 +00:00
Zalathar
7b73e4fd44 Allow restricted trait impls in macros with min_specialization 
Implementing traits marked with `#[rustc_specialization_trait]` normally
requires (min-)specialization to be enabled for the enclosing crate.

With this change, that permission can also be granted by an
`allow_internal_unstable` attribute on the macro that generates the impl.
 2024-02-10 18:14:02 +11:00
Oli Scherer
eab2adb660 Continue to borrowck even if there were previous errors 2024-02-08 08:10:43 +00:00
bors
870a01a30e Auto merge of #120558 - oli-obk:missing_impl_item_ice, r=estebank 
Stop bailing out from compilation just because there were incoherent traits

fixes #120343

but also has a lot of "type annotations needed" fallout. Some are fixed in the second commit.
 2024-02-08 05:01:09 +00:00
r0cky
c7519d42c2 Update tests 2024-02-07 10:42:01 +08:00
Oli Scherer
83738a9b1c Stop bailing out from compilation just because there were incoherent traits 2024-02-05 10:17:31 +00:00
Esteban Küber
6efddac288 Provide more context on derived obligation error primary label 
Expand the primary span of E0277 when the immediate unmet bound is not what the user wrote:

```
error[E0277]: the trait bound `i32: Bar` is not satisfied
 --> f100.rs:6:6
  |
6 |     <i32 as Foo>::foo();
  |      ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo`
  |
help: this trait has no implementations, consider adding one
 --> f100.rs:2:1
  |
2 | trait Bar {}
  | ^^^^^^^^^
note: required for `i32` to implement `Foo`
 --> f100.rs:3:14
  |
3 | impl<T: Bar> Foo for T {}
  |         ---  ^^^     ^
  |         |
  |         unsatisfied trait bound introduced here
```

Fix #40120.
 2024-01-30 21:28:18 +00:00
Guillaume Gomez
f7043a41ce
Rollup merge of #120400 - estebank:bound-error-cleanup, r=oli-obk 
Bound errors span label cleanup

Consolidate span labels for "this type doesn't satisfy a bound" for more compact diagnostic output.
 2024-01-30 11:19:15 +01:00
Esteban Küber
7df4a09fc4 Use single label for method not found due to unmet bound 2024-01-26 20:47:19 +00:00
Oli Scherer
db7cd57091 Remove track_errors entirely 2024-01-23 15:23:22 +00:00
Oli Scherer
9454b51b05 Make generic const type mismatches not hide trait impls from the trait solver 2024-01-22 13:23:45 +00:00
bors
5378c1cf07 Auto merge of #119821 - oli-obk:reveal_all_const_evals, r=lcnr 
Always use RevealAll for const eval queries

implements what is described in https://github.com/rust-lang/rust/pull/116803#discussion_r1364089471

Using `UserFacing` for const eval does not make sense anymore, unless we significantly change things like avoiding revealing opaque types.

New tests are copied from https://github.com/rust-lang/rust/pull/101478
 2024-01-20 04:57:51 +00:00
Oli Scherer
867831a170 Always use RevealAll for const eval queries 2024-01-19 11:32:34 +00:00
Matthias Krüger
0891cb4d81
Rollup merge of #119963 - clubby789:spec-allow-internal-unstable, r=compiler-errors 
Fix `allow_internal_unstable` for `(min_)specialization`

Fixes #119950

Blocked on #119949 (comment doesn't make sense until that merges)

I'd like to follow this up and look for more instances of not properly checking spans for features but I wanted to fix the motivating issue.
 2024-01-15 08:44:49 +01:00
clubby789
0529ccf341 Fix allow_internal_unstable for (min_)specialization 2024-01-14 13:50:02 +00:00
George-lewis
d56cdd48cb Bless tests 
Update tests
 2024-01-13 12:46:58 -05:00
bors
5113ed28ea Auto merge of #118297 - shepmaster:warn-dead-tuple-fields, r=WaffleLapkin 
Merge `unused_tuple_struct_fields` into `dead_code`

This implicitly upgrades the lint from `allow` to `warn` and places it into the `unused` lint group.

[Discussion on Zulip](https://rust-lang.zulipchat.com/#narrow/stream/131828-t-compiler/topic/Moving.20.60unused_tuple_struct_fields.60.20from.20allow.20to.20warn)
 2024-01-05 04:51:55 +00:00
Jake Goulding
53eca9fa87 Adjust compiler tests for unused_tuple_struct_fields -> dead_code 2024-01-02 15:34:37 -05:00
Oli Scherer
cd4c352fb4 Reorder check_item_type diagnostics so they occur next to the corresponding check_well_formed diagnostics 2024-01-02 14:17:56 +00:00
León Orell Valerian Liehr
3eb48a35c8
Introduce const Trait (always-const trait bounds) 2023-12-27 12:51:32 +01:00
lcnr
11d16c4082 update use of feature flags 2023-12-14 15:22:37 +01:00
surechen
40ae34194c remove redundant imports 
detects redundant imports that can be eliminated.

for #117772 :

In order to facilitate review and modification, split the checking code and
removing redundant imports code into two PR.
 2023-12-10 10:56:22 +08:00
Nilstrieb
41e8d152dc Show number in error message even for one error 
Co-authored-by: Adrian <adrian.iosdev@gmail.com>
 2023-11-24 19:15:52 +01:00
Oli Scherer
beaf46f7e5 Work around the fact that check_mod_type_wf may spuriously return ErrorGuaranteed, even if that error is only emitted by check_modwitem_types 2023-10-25 12:04:54 +00:00
Michael Goulet
592163fb71 Extend impl's def_span to include where clauses 2023-10-09 11:47:02 +00:00
Michael Goulet
82e7cec16d Tweak expected message to explain what it's actually signifying 2023-09-23 00:57:17 +00:00
Michael Goulet
30e6cea0ae Point out if a local trait has no implementations 2023-09-10 21:20:36 +00:00