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async fn lifetime elision tests#63383

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Centril:async-lifetime-elision-tests
Aug 14, 2019
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async fn lifetime elision tests#63383
bors merged 5 commits intorust-lang:masterfrom
Centril:async-lifetime-elision-tests

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@Centril Centril commented Aug 8, 2019

Add async fn version of the tests in #61207 per the first checkbox in #62121 (comment).
Works towards resolving blockers in #63209.

r? @nikomatsakis
cc @cramertj

@rust-highfive rust-highfive added the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Aug 8, 2019
Centril
Centril commented Aug 8, 2019
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src/test/ui/self/elision/README.md
| `struct-async.rs`| ✓ | ✓ | N/A |
| `alias-async.rs`| ✓ | ✓ | N/A |
| `assoc-async.rs`| ✓ | ✓ | N/A |
| `ref-self-async.rs` | X | X | α ⟶ β + γ |
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@Centril Centril Aug 8, 2019 •
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N.B. these cases where things diverge.

While writing these tests I also hit:

#![feature(async_await)]

#![feature(nll)]
// Without it you also get //~^ ERROR cannot infer an appropriate lifetime

struct A;

impl A {
    async fn foo(&self, f: &u32) -> &A {
        self
    }
}

which passes if you remove async but with it you get:

error[E0106]: missing lifetime specifier
 --> src/lib.rs:7:37
  |
7 |     async fn foo(&self, f: &u32) -> &A {
  |                                     ^
  |
  = note: return-position elided lifetimes require exactly one input-position elided lifetime, found multiple.

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Yeah, this seems like a bug, but I see you filed one already (#63388)

@Centril Centril mentioned this pull request Aug 8, 2019
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nikomatsakis approved these changes Aug 12, 2019
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This looks good to me. We should probably land this PR as it documents current state.

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nikomatsakis commented Aug 12, 2019

@bors r+

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bors commented Aug 12, 2019

📌 Commit 5ce8f7a has been approved by nikomatsakis

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Aug 12, 2019
@nikomatsakis nikomatsakis mentioned this pull request Aug 12, 2019
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Centril added a commit to Centril/rust that referenced this pull request Aug 12, 2019
@Centril
Rollup merge of rust-lang#63383 - Centril:async-lifetime-elision-test…
3bfce9d 
…s, r=nikomatsakis

`async fn` lifetime elision tests

Add `async fn` version of the tests in rust-lang#61207 per the first checkbox in rust-lang#62121 (comment).
Works towards resolving blockers in rust-lang#63209.

r? @nikomatsakis
cc @cramertj
@Centril Centril mentioned this pull request Aug 12, 2019
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Centril commented Aug 12, 2019

@bors p=19

Centril added a commit to Centril/rust that referenced this pull request Aug 13, 2019
@Centril
Rollup merge of rust-lang#63383 - Centril:async-lifetime-elision-test…
fbc7bbf 
…s, r=nikomatsakis

`async fn` lifetime elision tests

Add `async fn` version of the tests in rust-lang#61207 per the first checkbox in rust-lang#62121 (comment).
Works towards resolving blockers in rust-lang#63209.

r? @nikomatsakis
cc @cramertj
@Centril Centril mentioned this pull request Aug 13, 2019
Closed
bors added a commit that referenced this pull request Aug 13, 2019
@bors
Auto merge of #63515 - Centril:rollup-r0z0yi8, r=Centril
917eecc 
Rollup of 11 pull requests

Successful merges:

 - #62760 (Deduplicate error messages in `librsctc_mir`)
 - #62849 (typeck: Prohibit RPIT types that inherit lifetimes)
 - #63383 (`async fn` lifetime elision tests)
 - #63421 (Implement Clone, Display for ascii::EscapeDefault)
 - #63459 (syntax: account for CVarArgs being in the argument list.)
 - #63475 (Bring back suggestion for splitting `<-` into `< -`)
 - #63485 (ci: move mirrors to their standalone bucket)
 - #63486 (Document `From` trait for `BinaryHeap`)
 - #63488 (improve DiagnosticBuilder docs)
 - #63493 (Remove unneeded comment in src/libcore/hash/mod.rs)
 - #63499 (handle elision in async fn correctly)

Failed merges:

r? @ghost
Centril added a commit to Centril/rust that referenced this pull request Aug 13, 2019
@Centril
Rollup merge of rust-lang#63383 - Centril:async-lifetime-elision-test…
85662a5 
…s, r=nikomatsakis

`async fn` lifetime elision tests

Add `async fn` version of the tests in rust-lang#61207 per the first checkbox in rust-lang#62121 (comment).
Works towards resolving blockers in rust-lang#63209.

r? @nikomatsakis
cc @cramertj
@Centril Centril mentioned this pull request Aug 13, 2019
Closed
bors added a commit that referenced this pull request Aug 13, 2019
@bors
Auto merge of #63517 - Centril:rollup-8qbalaf, r=Centril
cf11696 
Rollup of 10 pull requests

Successful merges:

 - #62760 (Deduplicate error messages in `librsctc_mir`)
 - #62849 (typeck: Prohibit RPIT types that inherit lifetimes)
 - #63383 (`async fn` lifetime elision tests)
 - #63421 (Implement Clone, Display for ascii::EscapeDefault)
 - #63459 (syntax: account for CVarArgs being in the argument list.)
 - #63475 (Bring back suggestion for splitting `<-` into `< -`)
 - #63485 (ci: move mirrors to their standalone bucket)
 - #63486 (Document `From` trait for `BinaryHeap`)
 - #63488 (improve DiagnosticBuilder docs)
 - #63493 (Remove unneeded comment in src/libcore/hash/mod.rs)

Failed merges:

r? @ghost
Mark-Simulacrum added a commit to Mark-Simulacrum/rust that referenced this pull request Aug 14, 2019
@Mark-Simulacrum
Rollup merge of rust-lang#63383 - Centril:async-lifetime-elision-test…
e386c78 
…s, r=nikomatsakis

`async fn` lifetime elision tests

Add `async fn` version of the tests in rust-lang#61207 per the first checkbox in rust-lang#62121 (comment).
Works towards resolving blockers in rust-lang#63209.

r? @nikomatsakis
cc @cramertj
@Mark-Simulacrum Mark-Simulacrum mentioned this pull request Aug 14, 2019
Closed
Centril added a commit to Centril/rust that referenced this pull request Aug 14, 2019
@Centril
Rollup merge of rust-lang#63383 - Centril:async-lifetime-elision-test…
ab4c257 
…s, r=nikomatsakis

`async fn` lifetime elision tests

Add `async fn` version of the tests in rust-lang#61207 per the first checkbox in rust-lang#62121 (comment).
Works towards resolving blockers in rust-lang#63209.

r? @nikomatsakis
cc @cramertj
@Centril Centril mentioned this pull request Aug 14, 2019
Closed
Centril added a commit to Centril/rust that referenced this pull request Aug 14, 2019
@Centril
Rollup merge of rust-lang#63383 - Centril:async-lifetime-elision-test…
3d5387d 
…s, r=nikomatsakis

`async fn` lifetime elision tests

Add `async fn` version of the tests in rust-lang#61207 per the first checkbox in rust-lang#62121 (comment).
Works towards resolving blockers in rust-lang#63209.

r? @nikomatsakis
cc @cramertj
@Centril Centril mentioned this pull request Aug 14, 2019
Merged
bors added a commit that referenced this pull request Aug 14, 2019
@bors
Auto merge of #63544 - Centril:rollup-qhqfcov, r=Centril
98282c0 
Rollup of 17 pull requests

Successful merges:

 - #62760 (Deduplicate error messages in `librsctc_mir`)
 - #62849 (typeck: Prohibit RPIT types that inherit lifetimes)
 - #63383 (`async fn` lifetime elision tests)
 - #63421 (Implement Clone, Display for ascii::EscapeDefault)
 - #63459 (syntax: account for CVarArgs being in the argument list.)
 - #63475 (Bring back suggestion for splitting `<-` into `< -`)
 - #63485 (ci: move mirrors to their standalone bucket)
 - #63486 (Document `From` trait for `BinaryHeap`)
 - #63488 (improve DiagnosticBuilder docs)
 - #63493 (Remove unneeded comment in src/libcore/hash/mod.rs)
 - #63499 (handle elision in async fn correctly)
 - #63501 (use `ParamName` to track in-scope lifetimes instead of Ident)
 - #63508 (Do not ICE when synthesizing spans falling inside unicode chars)
 - #63511 (ci: add a check for clock drift)
 - #63512 (Provide map_ok and map_err method for Poll<Option<Result<T, E>>>)
 - #63529 (RELEASES.md: ? is one of three Kleene operators)
 - #63530 (Fix typo in error message.)

Failed merges:

r? @ghost
bors added a commit that referenced this pull request Aug 14, 2019
@bors
Auto merge of #63544 - Centril:rollup-qhqfcov, r=Centril
c43d03a 
Rollup of 17 pull requests

Successful merges:

 - #62760 (Deduplicate error messages in `librsctc_mir`)
 - #62849 (typeck: Prohibit RPIT types that inherit lifetimes)
 - #63383 (`async fn` lifetime elision tests)
 - #63421 (Implement Clone, Display for ascii::EscapeDefault)
 - #63459 (syntax: account for CVarArgs being in the argument list.)
 - #63475 (Bring back suggestion for splitting `<-` into `< -`)
 - #63485 (ci: move mirrors to their standalone bucket)
 - #63486 (Document `From` trait for `BinaryHeap`)
 - #63488 (improve DiagnosticBuilder docs)
 - #63493 (Remove unneeded comment in src/libcore/hash/mod.rs)
 - #63499 (handle elision in async fn correctly)
 - #63501 (use `ParamName` to track in-scope lifetimes instead of Ident)
 - #63508 (Do not ICE when synthesizing spans falling inside unicode chars)
 - #63511 (ci: add a check for clock drift)
 - #63512 (Provide map_ok and map_err method for Poll<Option<Result<T, E>>>)
 - #63529 (RELEASES.md: ? is one of three Kleene operators)
 - #63530 (Fix typo in error message.)

Failed merges:

r? @ghost
@bors bors merged commit 5ce8f7a into rust-lang:master Aug 14, 2019
@Centril Centril deleted the async-lifetime-elision-tests branch August 14, 2019 11:45
Centril added a commit to Centril/rust that referenced this pull request Aug 20, 2019
@Centril
Rollup merge of rust-lang#63209 - Centril:stabilize-async-await, r=cr…
3f7e7c2 
…amertj

Stabilize `async_await` in Rust 1.39.0

Here we stabilize:
- free and inherent `async fn`s,
- the `<expr>.await` expression form,
- and the `async move? { ... }` block form.

Closes rust-lang#62149.
Closes rust-lang#50547.

All the blockers are now closed.

<details>
- [x] FCP in rust-lang#62149
- [x] rust-lang#61949; PR in rust-lang#62849.
- [x] rust-lang#62517; PR in rust-lang#63376.
- [x] rust-lang#63225; PR in rust-lang#63501
- [x] rust-lang#63388; PR in rust-lang#63499
- [x] rust-lang#63500; PR in rust-lang#63501
- [x] rust-lang#62121 (comment)
    - [x] Some tests for control flow (PR rust-lang#63387):
          - `?`
          - `return` in `async` blocks
          - `break`
    - [x] rust-lang#61775 (comment), i.e. tests for rust-lang#60944 with `async fn`s instead). PR in rust-lang#63383

</details>

r? @cramertj
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