Commit Graph

567 Commits

Author SHA1 Message Date
bors
e4417cf020 Auto merge of #92268 - jswrenn:transmute, r=oli-obk
Initial implementation of transmutability trait.

*T'was the night before Christmas and all through the codebase, not a miri was stirring — no hint of `unsafe`!*

This PR provides an initial, **incomplete** implementation of *[MCP 411: Lang Item for Transmutability](https://github.com/rust-lang/compiler-team/issues/411)*. The `core::mem::BikeshedIntrinsicFrom` trait provided by this PR is implemented on-the-fly by the compiler for types `Src` and `Dst` when the bits of all possible values of type `Src` are safely reinterpretable as a value of type `Dst`.

What this PR provides is:
- [x] [support for transmutations involving primitives](https://github.com/jswrenn/rust/tree/transmute/src/test/ui/transmutability/primitives)
- [x] [support for transmutations involving arrays](https://github.com/jswrenn/rust/tree/transmute/src/test/ui/transmutability/arrays)
- [x] [support for transmutations involving structs](https://github.com/jswrenn/rust/tree/transmute/src/test/ui/transmutability/structs)
- [x] [support for transmutations involving enums](https://github.com/jswrenn/rust/tree/transmute/src/test/ui/transmutability/enums)
- [x] [support for transmutations involving unions](https://github.com/jswrenn/rust/tree/transmute/src/test/ui/transmutability/unions)
- [x] [support for weaker validity checks](https://github.com/jswrenn/rust/blob/transmute/src/test/ui/transmutability/unions/should_permit_intersecting_if_validity_is_assumed.rs) (i.e., `Assume::VALIDITY`)
- [x] visibility checking

What isn't yet implemented:
- [ ] transmutability options passed using the `Assume` struct
- [ ] [support for references](https://github.com/jswrenn/rust/blob/transmute/src/test/ui/transmutability/references.rs)
- [ ] smarter error messages

These features will be implemented in future PRs.
2022-08-02 21:17:31 +00:00
Camille GILLOT
212a06ee69 Match on TraitItem exhaustively. 2022-08-01 21:39:59 +02:00
Camille GILLOT
110f0656cb Store associated item defaultness in impl_defaultness. 2022-08-01 21:38:16 +02:00
Matthias Krüger
e6bb00fff5
Rollup merge of #100003 - nnethercote:improve-size-assertions, r=lqd
Improve size assertions.

- For any file with four or more size assertions, move them into a
  separate module (as is already done for `hir.rs`).
- Add some more for AST nodes and THIR nodes.
- Put the `hir.rs` ones in alphabetical order.

r? `@lqd`
2022-08-01 16:49:33 +02:00
Goldstein
d9f28b7b70
fix ICE in Definitions::create_def 2022-08-01 16:15:55 +03:00
Nicholas Nethercote
9037ebba0c Improve size assertions.
- For any file with four or more size assertions, move them into a
  separate module (as is already done for `hir.rs`).
- Add some more for AST nodes and THIR nodes.
- Put the `hir.rs` ones in alphabetical order.
2022-08-01 09:15:05 +10:00
Jack Wrenn
bc4a1dea41 Initial (incomplete) implementation of transmutability trait.
This initial implementation handles transmutations between types with specified layouts, except when references are involved.

Co-authored-by: Igor null <m1el.2027@gmail.com>
2022-07-27 17:33:56 +00:00
Camille GILLOT
10be0dd8df Replace LifetimeRes::Anonymous by LifetimeRes::Infer. 2022-07-26 19:00:31 +02:00
Camille GILLOT
ab63591f00 Remove the distinction between LifetimeName::Implicit and LifetimeName::Underscore. 2022-07-26 19:00:31 +02:00
bors
6dbae3ad19 Auto merge of #97313 - cjgillot:ast-lifetimes-anon, r=petrochenkov
Resolve function lifetime elision on the AST

~Based on https://github.com/rust-lang/rust/pull/97720~

Lifetime elision for functions is purely syntactic in nature, so can be resolved on the AST.
This PR replicates the elision logic and diagnostics on the AST, and replaces HIR-based resolution by a `delay_span_bug`.

This refactor allows for more consistent diagnostics, which don't have to guess the original code from HIR.

r? `@petrochenkov`
2022-07-25 20:02:55 +00:00
Camille GILLOT
3c5048d2ec Report elision failures on the AST. 2022-07-25 19:19:23 +02:00
Michael Goulet
3eef023da0 Address more nits 2022-07-21 16:43:10 +00:00
Michael Goulet
99c32570bb Do if-expression obligation stuff less eagerly 2022-07-21 07:39:28 +00:00
Camille GILLOT
bfd0435fd7 Introduce AnonymousLifetimeRib::Elided and use it for implied 'static. 2022-07-20 22:12:12 +02:00
Michael Woerister
88f6c6d8a0 Remove unused StableMap and StableSet types from rustc_data_structures 2022-07-20 13:11:39 +02:00
Michael Woerister
b8138db0ff Use FxIndexMap instead of otherwise unused StableMap for WEAK_ITEMS_REFS. 2022-07-20 12:40:51 +02:00
Dylan DPC
24f0e1499e
Rollup merge of #99119 - TaKO8Ki:remove-string-matching-about-methods, r=cjgillot
Refactor: remove a string matching about methods

This patch remove a string matching about methods and adds some rustfix tests.
2022-07-15 15:53:38 +05:30
Takayuki Maeda
45b88aff10 simplify suggest_deref_ref_or_into 2022-07-15 14:29:15 +09:00
Dylan DPC
e5a86d7358
Rollup merge of #98705 - WaffleLapkin:closure_binder, r=cjgillot
Implement `for<>` lifetime binder for closures

This PR implements RFC 3216 ([TI](https://github.com/rust-lang/rust/issues/97362)) and allows code like the following:

```rust
let _f = for<'a, 'b> |a: &'a A, b: &'b B| -> &'b C { b.c(a) };
//       ^^^^^^^^^^^--- new!
```

cc ``@Aaron1011`` ``@cjgillot``
2022-07-14 14:14:21 +05:30
Maybe Waffle
d2923b4007 Add back expr size checks 2022-07-12 21:00:13 +04:00
Maybe Waffle
df4fee9841 Add an indirection for closures in hir::ExprKind
This helps bring `hir::Expr` size down, `Closure` was the biggest
variant, especially after `for<>` additions.
2022-07-12 21:00:13 +04:00
Maybe Waffle
c2dbd62c7c Lower closure binders to hir & properly check them 2022-07-12 21:00:03 +04:00
Maybe Waffle
f89ef3cf66 Comment out expr size check 2022-07-12 16:26:08 +04:00
Ding Xiang Fei
5374688e1d
add tests for async await 2022-07-11 23:20:39 +02:00
Ding Xiang Fei
1cd30e7b32
move else block into the Local struct 2022-07-11 23:20:37 +02:00
Ding Xiang Fei
6c529ded86
lower let-else in MIR instead 2022-07-11 23:20:36 +02:00
Dylan DPC
6497130baa
Rollup merge of #99043 - compiler-errors:derive-nit, r=cjgillot
Collapse some weirdly-wrapping derives

self-explanatory
2022-07-09 11:28:07 +05:30
Michael Goulet
69ac8a68af Collapse some weirdly-wrapping derives 2022-07-08 04:36:30 +00:00
Michael Goulet
ff9fd36aa4 Implement IntoDiagnosticArg for hir::ConstContext 2022-07-08 03:47:31 +00:00
bors
1517f5de01 Auto merge of #99024 - matthiaskrgr:rollup-8ygpcpg, r=matthiaskrgr
Rollup of 9 pull requests

Successful merges:

 - #97917 (Implement ExitCodeExt for Windows)
 - #98844 (Reword comments and rename HIR visiting methods.)
 - #98979 (interpret: use AllocRange in UninitByteAccess)
 - #98986 (Fix missing word in comment)
 - #98994 (replace process exit with more detailed exit in src/bootstrap/*.rs)
 - #98995 (Add a test for #80471)
 - #99002 (suggest adding a derive for #[default] applied to variants)
 - #99004 (Add a test for #70408)
 - #99017 (Replace boolean argument for print_where_clause with an enum to make code more clear)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
2022-07-07 20:55:34 +00:00
Camille GILLOT
111df9e6ed Reword comments and rename HIR visiting methods. 2022-07-07 16:01:43 +02:00
Camille GILLOT
250c71b85d Make AST lowering a query. 2022-07-06 23:04:55 +02:00
Cameron Steffen
ec82bc1996 Factor out hir::Node::Binding 2022-07-01 10:04:19 -05:00
bors
66c83ffca1 Auto merge of #98558 - nnethercote:smallvec-1.8.1, r=lqd
Update `smallvec` to 1.8.1.

This pulls in https://github.com/servo/rust-smallvec/pull/282, which
gives some small wins for rustc.

r? `@lqd`
2022-06-29 09:11:29 +00:00
bors
5ffa8f67b7 Auto merge of #98222 - cjgillot:single-wf, r=michaelwoerister
Only keep a single query for well-formed checking

There are currently 3 queries to perform wf checks on different item-likes.  This complexity is not required.

This PR replaces the query by:
- one query per item;
- one query to invoke it for a whole module.

This allows to remove HIR `ParItemLikeVisitor`.
2022-06-28 03:44:33 +00:00
Nicholas Nethercote
7c40661ddb Update smallvec to 1.8.1.
This pulls in https://github.com/servo/rust-smallvec/pull/282, which
gives some small wins for rustc.
2022-06-27 08:48:55 +10:00
bors
10f4ce324b Auto merge of #98279 - cjgillot:all-fresh-nofn, r=petrochenkov
Create elided lifetime parameters for function-like types

Split from https://github.com/rust-lang/rust/pull/97720

This PR refactor lifetime generic parameters in bare function types and parenthesized traits to introduce the additional required lifetimes as fresh parameters in a `for<>` bound.

This PR does the same to lifetimes appearing in closure signatures, and as-if introducing `for<>` bounds on closures (without the associated change in semantics).

r? `@petrochenkov`
2022-06-22 10:48:58 +00:00
Camille GILLOT
9ae2546907 Only keep a single well-formed query. 2022-06-21 23:56:17 +02:00
Camille GILLOT
7437136f0e Use CreateParameter mode for closures too. 2022-06-21 21:13:43 +02:00
Camille GILLOT
32af719b07 Always create parameters for functions-like types. 2022-06-21 21:13:41 +02:00
Camille GILLOT
bc6a2c11ee Leave the responsibility to create Fresh lifetimes to lowering. 2022-06-19 22:32:43 +02:00
Matthias Krüger
f351f347b8
Rollup merge of #98165 - WaffleLapkin:once_things_renamings, r=m-ou-se
once cell renamings

This PR does the renamings proposed in https://github.com/rust-lang/rust/issues/74465#issuecomment-1153703128

- Move/rename `lazy::{OnceCell, Lazy}` to `cell::{OnceCell, LazyCell}`
- Move/rename `lazy::{SyncOnceCell, SyncLazy}` to `sync::{OnceLock, LazyLock}`

(I used `Lazy...` instead of `...Lazy` as it seems to be more consistent, easier to pronounce, etc)

```@rustbot``` label +T-libs-api -T-libs
2022-06-19 00:17:13 +02:00
bors
cdcc53b7dc Auto merge of #98153 - nnethercote:fix-MissingDoc-quadratic-behaviour, r=cjgillot
Fix `MissingDoc` quadratic behaviour

Best reviewed one commit at a time.

r? `@cjgillot`
2022-06-18 09:57:00 +00:00
bors
3a8b0144c8 Auto merge of #98106 - cjgillot:split-definitions, r=michaelwoerister
Split up `Definitions` and `ResolverAstLowering`.

Split off https://github.com/rust-lang/rust/pull/95573

r? `@michaelwoerister`
2022-06-17 10:00:11 +00:00
Maybe Waffle
c1a2db3372 Move/rename lazy::Sync{OnceCell,Lazy} to sync::{Once,Lazy}Lock 2022-06-16 19:54:42 +04:00
Nicholas Nethercote
c9e97251ad Remove unused hir_id arg from visit_attribute. 2022-06-16 09:52:04 +10:00
Yuki Okushi
87e373e82f
Rollup merge of #98110 - cjgillot:closure-brace, r=Aaron1011
Make `ExprKind::Closure` a struct variant.

Simple refactor since we both need it to introduce additional fields in `ExprKind::Closure`.

r? ``@Aaron1011``
2022-06-15 19:37:14 +09:00
Camille GILLOT
34e4d72929 Separate source_span and expn_that_defined from Definitions. 2022-06-14 22:45:51 +02:00
Camille GILLOT
603746a35e Make ResolverAstLowering a struct. 2022-06-14 22:44:27 +02:00
klensy
4ea4e2e76d remove currently unused deps 2022-06-13 22:20:51 +03:00