Rollup of 5 pull requests #99229
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Rollup of 5 pull requests #99229
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Before: ``` thread 'main' panicked at 'Unable to build RLS', dist.rs:42:9 ``` After: ``` thread 'main' panicked at 'Unable to build submodule tool RLS (use `missing-tools = true` to ignore this failure) note: not all tools are available on all nightlies help: see https://forge.rust-lang.org/infra/toolstate.html for more information', dist.rs:43:9 ```
This is first step in implementing RFC 3216. - Parse `for<'a>` before closures in ast - Error in lowering - Add `closure_lifetime_binder` feature
This helps bring `hir::Expr` size down, `Closure` was the biggest variant, especially after `for<>` additions.
Line spans were incorrect if the first line of an asm statement was an empty string.
This only stabilizes the base types, not the non-zero variants, since those have their own separate tracking issue and have not gone through FCP to stabilize.
Always create elided lifetime parameters for functions
Anonymous and elided lifetimes in functions are sometimes (async fns) --and sometimes not (regular fns)-- desugared to implicit generic parameters.
This difference of treatment makes it some downstream analyses more complicated to handle. This step is a pre-requisite to perform lifetime elision resolution on AST.
There is currently an inconsistency in the treatment of argument-position impl-trait for functions and async fns:
```rust
trait Foo<'a> {}
fn foo(t: impl Foo<'_>) {} //~ ERROR missing lifetime specifier
async fn async_foo(t: impl Foo<'_>) {} //~ OK
fn bar(t: impl Iterator<Item = &'_ u8>) {} //~ ERROR missing lifetime specifier
async fn async_bar(t: impl Iterator<Item = &'_ u8>) {} //~ OK
```
The current implementation reports "missing lifetime specifier" on `foo`, but **accepts it** in `async_foo`.
This PR **proposes to accept** the anonymous lifetime in both cases as an extra generic lifetime parameter.
This change would be insta-stable, so let's ping t-lang.
Anonymous lifetimes in GAT bindings keep being forbidden:
```rust
fn foo(t: impl Foo<Assoc<'_> = Bar<'_>>) {}
^^ ^^
forbidden ok
```
I started a discussion here: https://rust-lang.zulipchat.com/#narrow/stream/213817-t-lang/topic/Anonymous.20lifetimes.20in.20universal.20impl-trait/near/284968606
r? `@petrochenkov`
…r=Mark-Simulacrum Stabilize `core::ffi:c_*` and rexport in `std::ffi` This only stabilizes the base types, not the non-zero variants, since those have their own separate tracking issue and have not gone through FCP to stabilize.
…llot Implement `for<>` lifetime binder for closures This PR implements RFC 3216 ([TI](rust-lang#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`
…acrum Give a better error when `x dist` fails for an optional tool Before: ``` thread 'main' panicked at 'Unable to build RLS', dist.rs:42:9 ``` After: ``` thread 'main' panicked at 'Unable to build submodule tool RLS (use `missing-tools = true` to ignore this failure) note: not all tools are available on all nightlies help: see https://forge.rust-lang.org/infra/toolstate.html for more information', dist.rs:43:9 ``` Closes rust-lang#85683 by explaining better why the error is expected.
Fix spans for asm diagnostics Line spans were incorrect if the first line of an asm statement was an empty string.
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⌛ Testing commit ec345f4 with merge 7c3245c8a50d3bf28cfedec3b2a42e9eea9215dc... |
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Successful merges:
core::ffi:c_*and re-export instd::ffi#98315 (Stabilizecore::ffi:c_*and rexport instd::ffi)for<>lifetime binder for closures #98705 (Implementfor<>lifetime binder for closures)x distfails for an optional tool #99139 (Give a better error whenx distfails for an optional tool)Failed merges:
r? @ghost
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