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Stabilize opaque type precise capturing

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This commit is contained in:
Michael Goulet 2024-07-12 06:12:24 -04:00
parent c6f81a452e
commit eae5b5c6e7
49 changed files with 70 additions and 134 deletions
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1
compiler/rustc_ast_passes/src/feature_gate.rs
View File

@ -557,7 +557,6 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session, features: &Features) {
gate_all!(fn_delegation, "functions delegation is not yet fully implemented");
gate_all!(postfix_match, "postfix match is experimental");
gate_all!(mut_ref, "mutable by-reference bindings are experimental");
gate_all!(precise_capturing, "precise captures on `impl Trait` are experimental");
gate_all!(global_registration, "global registration is experimental");
gate_all!(unsafe_attributes, "`#[unsafe()]` markers for attributes are experimental");
gate_all!(return_type_notation, "return type notation is experimental");

2
compiler/rustc_feature/src/accepted.rs
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@ -309,6 +309,8 @@ declare_features! (
(accepted, param_attrs, "1.39.0", Some(60406)),
/// Allows parentheses in patterns.
(accepted, pattern_parentheses, "1.31.0", Some(51087)),
/// Allows `use<'a, 'b, A, B>` in `impl Trait + use<...>` for precise capture of generic args.
(accepted, precise_capturing, "CURRENT_RUSTC_VERSION", Some(123432)),
/// Allows procedural macros in `proc-macro` crates.
(accepted, proc_macro, "1.29.0", Some(38356)),
/// Allows multi-segment paths in attributes and derives.

2
compiler/rustc_feature/src/unstable.rs
View File

@ -561,8 +561,6 @@ declare_features! (
(unstable, patchable_function_entry, "1.81.0", Some(123115)),
/// Allows postfix match `expr.match { ... }`
(unstable, postfix_match, "1.79.0", Some(121618)),
/// Allows `use<'a, 'b, A, B>` in `impl Trait + use<...>` for precise capture of generic args.
(unstable, precise_capturing, "1.79.0", Some(123432)),
/// Allows macro attributes on expressions, statements and non-inline modules.
(unstable, proc_macro_hygiene, "1.30.0", Some(54727)),
/// Allows `&raw const $place_expr` and `&raw mut $place_expr` expressions.

1
compiler/rustc_hir/src/hir.rs
View File

@ -2773,7 +2773,6 @@ impl PreciseCapturingArg<'_> {
/// resolution to. Lifetimes don't have this problem, and for them, it's actually
/// kind of detrimental to use a custom node type versus just using [`Lifetime`],
/// since resolve_bound_vars operates on `Lifetime`s.
// FIXME(precise_capturing): Investigate storing this as a path instead?
#[derive(Debug, Clone, Copy, HashStable_Generic)]
pub struct PreciseCapturingNonLifetimeArg {
pub hir_id: HirId,

7
compiler/rustc_lint/src/impl_trait_overcaptures.rs
View File

@ -27,8 +27,6 @@ declare_lint! {
/// ### Example
///
/// ```rust,compile_fail
/// # #![feature(precise_capturing)]
/// # #![allow(incomplete_features)]
/// # #![deny(impl_trait_overcaptures)]
/// # use std::fmt::Display;
/// let mut x = vec![];
@ -56,7 +54,6 @@ declare_lint! {
pub IMPL_TRAIT_OVERCAPTURES,
Allow,
"`impl Trait` will capture more lifetimes than possibly intended in edition 2024",
@feature_gate = precise_capturing;
//@future_incompatible = FutureIncompatibleInfo {
// reason: FutureIncompatibilityReason::EditionSemanticsChange(Edition::Edition2024),
// reference: "<FIXME>",
@ -75,8 +72,7 @@ declare_lint! {
/// ### Example
///
/// ```rust,compile_fail
/// # #![feature(precise_capturing, lifetime_capture_rules_2024)]
/// # #![allow(incomplete_features)]
/// # #![feature(lifetime_capture_rules_2024)]
/// # #![deny(impl_trait_redundant_captures)]
/// fn test<'a>(x: &'a i32) -> impl Sized + use<'a> { x }
/// ```
@ -90,7 +86,6 @@ declare_lint! {
pub IMPL_TRAIT_REDUNDANT_CAPTURES,
Warn,
"redundant precise-capturing `use<...>` syntax on an `impl Trait`",
@feature_gate = precise_capturing;
}
declare_lint_pass!(

1
compiler/rustc_parse/src/parser/ty.rs
View File

@ -851,7 +851,6 @@ impl<'a> Parser<'a> {
// lifetimes and ident params (including SelfUpper). These are validated later
// for order, duplication, and whether they actually reference params.
let use_span = self.prev_token.span;
self.psess.gated_spans.gate(sym::precise_capturing, use_span);
let (args, args_span) = self.parse_precise_capturing_args()?;
GenericBound::Use(args, use_span.to(args_span))
} else {

2
tests/rustdoc-json/impl-trait-precise-capturing.rs
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@ -1,5 +1,3 @@
#![feature(precise_capturing)]
//@ is "$.index[*][?(@.name=='hello')].inner.function.decl.output.impl_trait[1].use[0]" \"\'a\"
//@ is "$.index[*][?(@.name=='hello')].inner.function.decl.output.impl_trait[1].use[1]" \"T\"
//@ is "$.index[*][?(@.name=='hello')].inner.function.decl.output.impl_trait[1].use[2]" \"N\"

1
tests/rustdoc/impl-trait-precise-capturing.rs
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@ -1,7 +1,6 @@
//@ aux-build:precise-capturing.rs
#![crate_name = "foo"]
#![feature(precise_capturing)]
extern crate precise_capturing;

4
tests/ui/feature-gates/feature-gate-precise-capturing.rs
View File

@ -1,4 +0,0 @@
fn hello() -> impl Sized + use<> {}
//~^ ERROR precise captures on `impl Trait` are experimental
fn main() {}

13
tests/ui/feature-gates/feature-gate-precise-capturing.stderr
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@ -1,13 +0,0 @@
error[E0658]: precise captures on `impl Trait` are experimental
--> $DIR/feature-gate-precise-capturing.rs:1:28
|
LL | fn hello() -> impl Sized + use<> {}
| ^^^
|
= note: see issue #123432 <https://github.com/rust-lang/rust/issues/123432> for more information
= help: add `#![feature(precise_capturing)]` to the crate attributes to enable
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0658`.

2
tests/ui/impl-trait/call_method_ambiguous.next.stderr
View File

@ -1,5 +1,5 @@
error[E0282]: type annotations needed
--> $DIR/call_method_ambiguous.rs:28:13
--> $DIR/call_method_ambiguous.rs:26:13
|
LL | let mut iter = foo(n - 1, m);
| ^^^^^^^^

2
tests/ui/impl-trait/call_method_ambiguous.rs
View File

@ -2,8 +2,6 @@
//@[next] compile-flags: -Znext-solver
//@[current] run-pass
#![feature(precise_capturing)]
trait Get {
fn get(&mut self) -> u32;
}

2
tests/ui/impl-trait/precise-capturing/apit.rs
View File

@ -1,5 +1,3 @@
#![feature(precise_capturing)]
fn hello(_: impl Sized + use<>) {}
//~^ ERROR `use<...>` precise capturing syntax not allowed in argument-position `impl Trait`

2
tests/ui/impl-trait/precise-capturing/apit.stderr
View File

@ -1,5 +1,5 @@
error: `use<...>` precise capturing syntax not allowed in argument-position `impl Trait`
--> $DIR/apit.rs:3:26
--> $DIR/apit.rs:1:26
|
LL | fn hello(_: impl Sized + use<>) {}
| ^^^^^

2
tests/ui/impl-trait/precise-capturing/bad-lifetimes.rs
View File

@ -1,5 +1,3 @@
#![feature(precise_capturing)]
fn no_elided_lt() -> impl Sized + use<'_> {}
//~^ ERROR missing lifetime specifier
//~| ERROR expected lifetime parameter in `use<...>` precise captures list, found `'_`

8
tests/ui/impl-trait/precise-capturing/bad-lifetimes.stderr
View File

@ -1,5 +1,5 @@
error[E0106]: missing lifetime specifier
--> $DIR/bad-lifetimes.rs:3:39
--> $DIR/bad-lifetimes.rs:1:39
|
LL | fn no_elided_lt() -> impl Sized + use<'_> {}
| ^^ expected named lifetime parameter
@ -11,7 +11,7 @@ LL | fn no_elided_lt() -> impl Sized + use<'static> {}
| ~~~~~~~
error[E0261]: use of undeclared lifetime name `'missing`
--> $DIR/bad-lifetimes.rs:10:37
--> $DIR/bad-lifetimes.rs:8:37
|
LL | fn missing_lt() -> impl Sized + use<'missing> {}
| - ^^^^^^^^ undeclared lifetime
@ -19,13 +19,13 @@ LL | fn missing_lt() -> impl Sized + use<'missing> {}
| help: consider introducing lifetime `'missing` here: `<'missing>`
error: expected lifetime parameter in `use<...>` precise captures list, found `'_`
--> $DIR/bad-lifetimes.rs:3:39
--> $DIR/bad-lifetimes.rs:1:39
|
LL | fn no_elided_lt() -> impl Sized + use<'_> {}
| ^^
error: expected lifetime parameter in `use<...>` precise captures list, found `'static`
--> $DIR/bad-lifetimes.rs:7:36
--> $DIR/bad-lifetimes.rs:5:36
|
LL | fn static_lt() -> impl Sized + use<'static> {}
| ^^^^^^^

2
tests/ui/impl-trait/precise-capturing/bad-params.rs
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@ -1,5 +1,3 @@
#![feature(precise_capturing)]
fn missing() -> impl Sized + use<T> {}
//~^ ERROR cannot find type `T` in this scope

8
tests/ui/impl-trait/precise-capturing/bad-params.stderr
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@ -1,5 +1,5 @@
error[E0412]: cannot find type `T` in this scope
--> $DIR/bad-params.rs:3:34
--> $DIR/bad-params.rs:1:34
|
LL | fn missing() -> impl Sized + use<T> {}
| ^ not found in this scope
@ -10,7 +10,7 @@ LL | fn missing<T>() -> impl Sized + use<T> {}
| +++
error[E0411]: cannot find type `Self` in this scope
--> $DIR/bad-params.rs:6:39
--> $DIR/bad-params.rs:4:39
|
LL | fn missing_self() -> impl Sized + use<Self> {}
| ------------ ^^^^ `Self` is only available in impls, traits, and type definitions
@ -18,7 +18,7 @@ LL | fn missing_self() -> impl Sized + use<Self> {}
| `Self` not allowed in a function
error: `Self` can't be captured in `use<...>` precise captures list, since it is an alias
--> $DIR/bad-params.rs:11:48
--> $DIR/bad-params.rs:9:48
|
LL | impl MyType {
| ----------- `Self` is not a generic argument, but an alias to the type of the implementation
@ -26,7 +26,7 @@ LL | fn self_is_not_param() -> impl Sized + use<Self> {}
| ^^^^
error: expected type or const parameter in `use<...>` precise captures list, found function
--> $DIR/bad-params.rs:15:32
--> $DIR/bad-params.rs:13:32
|
LL | fn hello() -> impl Sized + use<hello> {}
| ^^^^^

2
tests/ui/impl-trait/precise-capturing/bound-modifiers.rs
View File

@ -1,7 +1,5 @@
//@ edition: 2021
#![feature(precise_capturing)]
fn polarity() -> impl Sized + ?use<> {}
//~^ ERROR expected identifier, found keyword `use`
//~| ERROR cannot find trait `r#use` in this scope

24
tests/ui/impl-trait/precise-capturing/bound-modifiers.stderr
View File

@ -1,53 +1,53 @@
error: expected identifier, found keyword `use`
--> $DIR/bound-modifiers.rs:5:32
--> $DIR/bound-modifiers.rs:3:32
|
LL | fn polarity() -> impl Sized + ?use<> {}
| ^^^ expected identifier, found keyword
error: expected identifier, found keyword `use`
--> $DIR/bound-modifiers.rs:11:38
--> $DIR/bound-modifiers.rs:9:38
|
LL | fn asyncness() -> impl Sized + async use<> {}
| ^^^ expected identifier, found keyword
error: expected identifier, found keyword `use`
--> $DIR/bound-modifiers.rs:16:38
--> $DIR/bound-modifiers.rs:14:38
|
LL | fn constness() -> impl Sized + const use<> {}
| ^^^ expected identifier, found keyword
error: expected identifier, found keyword `use`
--> $DIR/bound-modifiers.rs:21:37
--> $DIR/bound-modifiers.rs:19:37
|
LL | fn binder() -> impl Sized + for<'a> use<> {}
| ^^^ expected identifier, found keyword
error[E0405]: cannot find trait `r#use` in this scope
--> $DIR/bound-modifiers.rs:5:32
--> $DIR/bound-modifiers.rs:3:32
|
LL | fn polarity() -> impl Sized + ?use<> {}
| ^^^ not found in this scope
error[E0405]: cannot find trait `r#use` in this scope
--> $DIR/bound-modifiers.rs:11:38
--> $DIR/bound-modifiers.rs:9:38
|
LL | fn asyncness() -> impl Sized + async use<> {}
| ^^^ not found in this scope
error[E0405]: cannot find trait `r#use` in this scope
--> $DIR/bound-modifiers.rs:16:38
--> $DIR/bound-modifiers.rs:14:38
|
LL | fn constness() -> impl Sized + const use<> {}
| ^^^ not found in this scope
error[E0405]: cannot find trait `r#use` in this scope
--> $DIR/bound-modifiers.rs:21:37
--> $DIR/bound-modifiers.rs:19:37
|
LL | fn binder() -> impl Sized + for<'a> use<> {}
| ^^^ not found in this scope
error[E0658]: async closures are unstable
--> $DIR/bound-modifiers.rs:11:32
--> $DIR/bound-modifiers.rs:9:32
|
LL | fn asyncness() -> impl Sized + async use<> {}
| ^^^^^
@ -58,7 +58,7 @@ LL | fn asyncness() -> impl Sized + async use<> {}
= help: to use an async block, remove the `||`: `async {`
error[E0658]: const trait impls are experimental
--> $DIR/bound-modifiers.rs:16:32
--> $DIR/bound-modifiers.rs:14:32
|
LL | fn constness() -> impl Sized + const use<> {}
| ^^^^^
@ -68,13 +68,13 @@ LL | fn constness() -> impl Sized + const use<> {}
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
warning: relaxing a default bound only does something for `?Sized`; all other traits are not bound by default
--> $DIR/bound-modifiers.rs:5:31
--> $DIR/bound-modifiers.rs:3:31
|
LL | fn polarity() -> impl Sized + ?use<> {}
| ^^^^^^
warning: relaxing a default bound only does something for `?Sized`; all other traits are not bound by default
--> $DIR/bound-modifiers.rs:5:31
--> $DIR/bound-modifiers.rs:3:31
|
LL | fn polarity() -> impl Sized + ?use<> {}
| ^^^^^^

2
tests/ui/impl-trait/precise-capturing/capture-parent-arg.rs
View File

@ -1,5 +1,3 @@
#![feature(precise_capturing)]
trait Tr {
type Assoc;
}

4
tests/ui/impl-trait/precise-capturing/capture-parent-arg.stderr
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@ -1,5 +1,5 @@
error: `impl Trait` captures lifetime parameter, but it is not mentioned in `use<...>` precise captures list
--> $DIR/capture-parent-arg.rs:27:31
--> $DIR/capture-parent-arg.rs:25:31
|
LL | impl<'a> W<'a> {
| -- this lifetime parameter is captured
@ -7,7 +7,7 @@ LL | fn bad1() -> impl Into<<W<'a> as Tr>::Assoc> + use<> {}
| -------------^^------------------------ lifetime captured due to being mentioned in the bounds of the `impl Trait`
error: `impl Trait` captures lifetime parameter, but it is not mentioned in `use<...>` precise captures list
--> $DIR/capture-parent-arg.rs:33:18
--> $DIR/capture-parent-arg.rs:31:18
|
LL | impl<'a> W<'a> {
| -- this lifetime parameter is captured

2
tests/ui/impl-trait/precise-capturing/duplicated-use.real.stderr
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@ -1,5 +1,5 @@
error: duplicate `use<...>` precise capturing syntax
--> $DIR/duplicated-use.rs:7:32
--> $DIR/duplicated-use.rs:5:32
|
LL | fn hello<'a>() -> impl Sized + use<'a> + use<'a> {}
| ^^^^^^^ ------- second `use<...>` here

2
tests/ui/impl-trait/precise-capturing/duplicated-use.rs
View File

@ -1,8 +1,6 @@
//@ revisions: real pre_expansion
//@[pre_expansion] check-pass
#![feature(precise_capturing)]
#[cfg(real)]
fn hello<'a>() -> impl Sized + use<'a> + use<'a> {}
//[real]~^ ERROR duplicate `use<...>` precise capturing syntax

2
tests/ui/impl-trait/precise-capturing/dyn-use.rs
View File

@ -1,4 +1,2 @@
#![feature(precise_capturing)]
fn dyn() -> &'static dyn use<> { &() }
//~^ ERROR expected one of `!`, `(`, `::`, `<`, `where`, or `{`, found keyword `use`

2
tests/ui/impl-trait/precise-capturing/dyn-use.stderr
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@ -1,5 +1,5 @@
error: expected one of `!`, `(`, `::`, `<`, `where`, or `{`, found keyword `use`
--> $DIR/dyn-use.rs:3:26
--> $DIR/dyn-use.rs:1:26
|
LL | fn dyn() -> &'static dyn use<> { &() }
| ^^^ expected one of `!`, `(`, `::`, `<`, `where`, or `{`

2
tests/ui/impl-trait/precise-capturing/elided.rs
View File

@ -1,7 +1,5 @@
//@ check-pass
#![feature(precise_capturing)]
fn elided(x: &()) -> impl Sized + use<'_> { x }
fn main() {}

2
tests/ui/impl-trait/precise-capturing/forgot-to-capture-const.rs
View File

@ -1,5 +1,3 @@
#![feature(precise_capturing)]
fn constant<const C: usize>() -> impl Sized + use<> {}
//~^ ERROR `impl Trait` must mention all const parameters in scope

2
tests/ui/impl-trait/precise-capturing/forgot-to-capture-const.stderr
View File

@ -1,5 +1,5 @@
error: `impl Trait` must mention all const parameters in scope in `use<...>`
--> $DIR/forgot-to-capture-const.rs:3:34
--> $DIR/forgot-to-capture-const.rs:1:34
|
LL | fn constant<const C: usize>() -> impl Sized + use<> {}
| -------------- ^^^^^^^^^^^^^^^^^^

2
tests/ui/impl-trait/precise-capturing/forgot-to-capture-lifetime.rs
View File

@ -1,5 +1,3 @@
#![feature(precise_capturing)]
fn lifetime_in_bounds<'a>(x: &'a ()) -> impl Into<&'a ()> + use<> { x }
//~^ ERROR `impl Trait` captures lifetime parameter, but it is not mentioned in `use<...>` precise captures list

4
tests/ui/impl-trait/precise-capturing/forgot-to-capture-lifetime.stderr
View File

@ -1,5 +1,5 @@
error: `impl Trait` captures lifetime parameter, but it is not mentioned in `use<...>` precise captures list
--> $DIR/forgot-to-capture-lifetime.rs:3:52
--> $DIR/forgot-to-capture-lifetime.rs:1:52
|
LL | fn lifetime_in_bounds<'a>(x: &'a ()) -> impl Into<&'a ()> + use<> { x }
| -- -----------^^------------
@ -8,7 +8,7 @@ LL | fn lifetime_in_bounds<'a>(x: &'a ()) -> impl Into<&'a ()> + use<> { x }
| this lifetime parameter is captured
error[E0700]: hidden type for `impl Sized` captures lifetime that does not appear in bounds
--> $DIR/forgot-to-capture-lifetime.rs:6:62
--> $DIR/forgot-to-capture-lifetime.rs:4:62
|
LL | fn lifetime_in_hidden<'a>(x: &'a ()) -> impl Sized + use<> { x }
| -- ------------------ ^

2
tests/ui/impl-trait/precise-capturing/forgot-to-capture-type.rs
View File

@ -1,5 +1,3 @@
#![feature(precise_capturing)]
fn type_param<T>() -> impl Sized + use<> {}
//~^ ERROR `impl Trait` must mention all type parameters in scope

6
tests/ui/impl-trait/precise-capturing/forgot-to-capture-type.stderr
View File

@ -1,5 +1,5 @@
error: `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
--> $DIR/forgot-to-capture-type.rs:7:30
--> $DIR/forgot-to-capture-type.rs:5:30
|
LL | fn bar() -> impl Sized + use<>;
| ^^^^^
@ -7,7 +7,7 @@ LL | fn bar() -> impl Sized + use<>;
= note: currently, return-position `impl Trait` in traits and trait implementations capture all lifetimes in scope
error: `impl Trait` must mention all type parameters in scope in `use<...>`
--> $DIR/forgot-to-capture-type.rs:3:23
--> $DIR/forgot-to-capture-type.rs:1:23
|
LL | fn type_param<T>() -> impl Sized + use<> {}
| - ^^^^^^^^^^^^^^^^^^
@ -17,7 +17,7 @@ LL | fn type_param<T>() -> impl Sized + use<> {}
= note: currently, all type parameters are required to be mentioned in the precise captures list
error: `impl Trait` must mention the `Self` type of the trait in `use<...>`
--> $DIR/forgot-to-capture-type.rs:7:17
--> $DIR/forgot-to-capture-type.rs:5:17
|
LL | trait Foo {
| --------- `Self` type parameter is implicitly captured by this `impl Trait`

2
tests/ui/impl-trait/precise-capturing/higher-ranked.rs
View File

@ -2,7 +2,7 @@
// Show how precise captures allow us to skip capturing a higher-ranked lifetime
#![feature(lifetime_capture_rules_2024, precise_capturing)]
#![feature(lifetime_capture_rules_2024)]
trait Trait<'a> {
type Item;

18
tests/ui/impl-trait/precise-capturing/illegal-positions.real.stderr
View File

@ -1,53 +1,53 @@
error: `use<...>` precise capturing syntax not allowed in supertrait bounds
--> $DIR/illegal-positions.rs:8:12
--> $DIR/illegal-positions.rs:6:12
|
LL | trait Foo: use<> {
| ^^^^^
error: `use<...>` precise capturing syntax not allowed in bounds
--> $DIR/illegal-positions.rs:10:33
--> $DIR/illegal-positions.rs:8:33
|
LL | type Assoc: use<> where (): use<>;
| ^^^^^
error: `use<...>` precise capturing syntax not allowed in bounds
--> $DIR/illegal-positions.rs:10:17
--> $DIR/illegal-positions.rs:8:17
|
LL | type Assoc: use<> where (): use<>;
| ^^^^^
error: `use<...>` precise capturing syntax not allowed in bounds
--> $DIR/illegal-positions.rs:16:11
--> $DIR/illegal-positions.rs:14:11
|
LL | fn fun<T: use<>>(_: impl use<>) where (): use<> {}
| ^^^^^
error: `use<...>` precise capturing syntax not allowed in bounds
--> $DIR/illegal-positions.rs:16:43
--> $DIR/illegal-positions.rs:14:43
|
LL | fn fun<T: use<>>(_: impl use<>) where (): use<> {}
| ^^^^^
error: at least one trait must be specified
--> $DIR/illegal-positions.rs:16:21
--> $DIR/illegal-positions.rs:14:21
|
LL | fn fun<T: use<>>(_: impl use<>) where (): use<> {}
| ^^^^^^^^^^
error: `use<...>` precise capturing syntax not allowed in `dyn` trait object bounds
--> $DIR/illegal-positions.rs:23:25
--> $DIR/illegal-positions.rs:21:25
|
LL | fn dynamic() -> Box<dyn use<>> {}
| ^^^^^
error: `use<...>` precise capturing syntax not allowed in argument-position `impl Trait`
--> $DIR/illegal-positions.rs:16:26
--> $DIR/illegal-positions.rs:14:26
|
LL | fn fun<T: use<>>(_: impl use<>) where (): use<> {}
| ^^^^^
error[E0224]: at least one trait is required for an object type
--> $DIR/illegal-positions.rs:23:21
--> $DIR/illegal-positions.rs:21:21
|
LL | fn dynamic() -> Box<dyn use<>> {}
| ^^^^^^^^^

2
tests/ui/impl-trait/precise-capturing/illegal-positions.rs
View File

@ -2,8 +2,6 @@
//@[pre_expansion] check-pass
//@ edition: 2021
#![feature(precise_capturing)]
#[cfg(real)]
trait Foo: use<> {
//[real]~^ ERROR `use<...>` precise capturing syntax not allowed

2
tests/ui/impl-trait/precise-capturing/ordering.rs
View File

@ -1,5 +1,3 @@
#![feature(precise_capturing)]
fn lt<'a>() -> impl Sized + use<'a, 'a> {}
//~^ ERROR cannot capture parameter `'a` twice

8
tests/ui/impl-trait/precise-capturing/ordering.stderr
View File

@ -1,23 +1,23 @@
error: cannot capture parameter `'a` twice
--> $DIR/ordering.rs:3:33
--> $DIR/ordering.rs:1:33
|
LL | fn lt<'a>() -> impl Sized + use<'a, 'a> {}
| ^^ -- parameter captured again here
error: cannot capture parameter `T` twice
--> $DIR/ordering.rs:6:32
--> $DIR/ordering.rs:4:32
|
LL | fn ty<T>() -> impl Sized + use<T, T> {}
| ^ - parameter captured again here
error: cannot capture parameter `N` twice
--> $DIR/ordering.rs:9:45
--> $DIR/ordering.rs:7:45
|
LL | fn ct<const N: usize>() -> impl Sized + use<N, N> {}
| ^ - parameter captured again here
error: lifetime parameter `'a` must be listed before non-lifetime parameters
--> $DIR/ordering.rs:12:45
--> $DIR/ordering.rs:10:45
|
LL | fn ordering<'a, T>() -> impl Sized + use<T, 'a> {}
| - ^^

2
tests/ui/impl-trait/precise-capturing/outlives.rs
View File

@ -2,7 +2,7 @@
// Show that precise captures allow us to skip a lifetime param for outlives
#![feature(lifetime_capture_rules_2024, precise_capturing)]
#![feature(lifetime_capture_rules_2024)]
fn hello<'a: 'a, 'b: 'b>() -> impl Sized + use<'a> { }

3
tests/ui/impl-trait/precise-capturing/overcaptures-2024.fixed
View File

@ -1,7 +1,6 @@
//@ run-rustfix
#![feature(precise_capturing)]
#![allow(unused, incomplete_features)]
#![allow(unused)]
#![deny(impl_trait_overcaptures)]
fn named<'a>(x: &'a i32) -> impl Sized + use<> { *x }

3
tests/ui/impl-trait/precise-capturing/overcaptures-2024.rs
View File

@ -1,7 +1,6 @@
//@ run-rustfix
#![feature(precise_capturing)]
#![allow(unused, incomplete_features)]
#![allow(unused)]
#![deny(impl_trait_overcaptures)]
fn named<'a>(x: &'a i32) -> impl Sized { *x }

18
tests/ui/impl-trait/precise-capturing/overcaptures-2024.stderr
View File

@ -1,17 +1,17 @@
error: `impl Sized` will capture more lifetimes than possibly intended in edition 2024
--> $DIR/overcaptures-2024.rs:7:29
--> $DIR/overcaptures-2024.rs:6:29
|
LL | fn named<'a>(x: &'a i32) -> impl Sized { *x }
| ^^^^^^^^^^
|
note: specifically, this lifetime is in scope but not mentioned in the type's bounds
--> $DIR/overcaptures-2024.rs:7:10
--> $DIR/overcaptures-2024.rs:6:10
|
LL | fn named<'a>(x: &'a i32) -> impl Sized { *x }
| ^^
= note: all lifetimes in scope will be captured by `impl Trait`s in edition 2024
note: the lint level is defined here
--> $DIR/overcaptures-2024.rs:5:9
--> $DIR/overcaptures-2024.rs:4:9
|
LL | #![deny(impl_trait_overcaptures)]
| ^^^^^^^^^^^^^^^^^^^^^^^
@ -21,13 +21,13 @@ LL | fn named<'a>(x: &'a i32) -> impl Sized + use<> { *x }
| +++++++
error: `impl Sized` will capture more lifetimes than possibly intended in edition 2024
--> $DIR/overcaptures-2024.rs:10:25
--> $DIR/overcaptures-2024.rs:9:25
|
LL | fn implicit(x: &i32) -> impl Sized { *x }
| ^^^^^^^^^^
|
note: specifically, this lifetime is in scope but not mentioned in the type's bounds
--> $DIR/overcaptures-2024.rs:10:16
--> $DIR/overcaptures-2024.rs:9:16
|
LL | fn implicit(x: &i32) -> impl Sized { *x }
| ^
@ -38,13 +38,13 @@ LL | fn implicit(x: &i32) -> impl Sized + use<> { *x }
| +++++++
error: `impl Sized + '_` will capture more lifetimes than possibly intended in edition 2024
--> $DIR/overcaptures-2024.rs:15:33
--> $DIR/overcaptures-2024.rs:14:33
|
LL | fn hello(&self, x: &i32) -> impl Sized + '_ { self }
| ^^^^^^^^^^^^^^^
|
note: specifically, this lifetime is in scope but not mentioned in the type's bounds
--> $DIR/overcaptures-2024.rs:15:24
--> $DIR/overcaptures-2024.rs:14:24
|
LL | fn hello(&self, x: &i32) -> impl Sized + '_ { self }
| ^
@ -55,13 +55,13 @@ LL | fn hello(&self, x: &i32) -> impl Sized + '_ + use<'_> { self }
| +++++++++
error: `impl Sized` will capture more lifetimes than possibly intended in edition 2024
--> $DIR/overcaptures-2024.rs:26:47
--> $DIR/overcaptures-2024.rs:25:47
|
LL | fn hrtb() -> impl for<'a> Higher<'a, Output = impl Sized> {}
| ^^^^^^^^^^
|
note: specifically, this lifetime is in scope but not mentioned in the type's bounds
--> $DIR/overcaptures-2024.rs:26:23
--> $DIR/overcaptures-2024.rs:25:23
|
LL | fn hrtb() -> impl for<'a> Higher<'a, Output = impl Sized> {}
| ^^

4
tests/ui/impl-trait/precise-capturing/redundant.normal.stderr
View File

@ -1,5 +1,5 @@
warning: all possible in-scope parameters are already captured, so `use<...>` syntax is redundant
--> $DIR/redundant.rs:7:19
--> $DIR/redundant.rs:5:19
|
LL | fn hello<'a>() -> impl Sized + use<'a> {}
| ^^^^^^^^^^^^^-------
@ -9,7 +9,7 @@ LL | fn hello<'a>() -> impl Sized + use<'a> {}
= note: `#[warn(impl_trait_redundant_captures)]` on by default
warning: all possible in-scope parameters are already captured, so `use<...>` syntax is redundant
--> $DIR/redundant.rs:12:27
--> $DIR/redundant.rs:10:27
|
LL | fn inherent(&self) -> impl Sized + use<'_> {}
| ^^^^^^^^^^^^^-------

4
tests/ui/impl-trait/precise-capturing/redundant.rpitit.stderr
View File

@ -1,5 +1,5 @@
error: `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
--> $DIR/redundant.rs:18:35
--> $DIR/redundant.rs:16:35
|
LL | fn in_trait() -> impl Sized + use<'a, Self>;
| ^^^^^^^^^^^^^
@ -7,7 +7,7 @@ LL | fn in_trait() -> impl Sized + use<'a, Self>;
= note: currently, return-position `impl Trait` in traits and trait implementations capture all lifetimes in scope
error: `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
--> $DIR/redundant.rs:23:35
--> $DIR/redundant.rs:21:35
|
LL | fn in_trait() -> impl Sized + use<'a> {}
| ^^^^^^^

2
tests/ui/impl-trait/precise-capturing/redundant.rs
View File

@ -2,8 +2,6 @@
//@ revisions: normal rpitit
//@[normal] check-pass
#![feature(precise_capturing)]
fn hello<'a>() -> impl Sized + use<'a> {}
//[normal]~^ WARN all possible in-scope parameters are already captured

2
tests/ui/impl-trait/precise-capturing/rpitit.rs
View File

@ -5,8 +5,6 @@
// To fix this soundly, we need to make sure that all the trait header args
// remain captured, since they affect trait selection.
#![feature(precise_capturing)]
trait Foo<'a> {
fn hello() -> impl PartialEq + use<Self>;
}

8
tests/ui/impl-trait/precise-capturing/rpitit.stderr
View File

@ -1,5 +1,5 @@
error: `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
--> $DIR/rpitit.rs:11:36
--> $DIR/rpitit.rs:9:36
|
LL | fn hello() -> impl PartialEq + use<Self>;
| ^^^^^^^^^
@ -7,7 +7,7 @@ LL | fn hello() -> impl PartialEq + use<Self>;
= note: currently, return-position `impl Trait` in traits and trait implementations capture all lifetimes in scope
error: `impl Trait` captures lifetime parameter, but it is not mentioned in `use<...>` precise captures list
--> $DIR/rpitit.rs:11:19
--> $DIR/rpitit.rs:9:19
|
LL | trait Foo<'a> {
| -- this lifetime parameter is captured
@ -15,7 +15,7 @@ LL | fn hello() -> impl PartialEq + use<Self>;
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ lifetime captured due to being mentioned in the bounds of the `impl Trait`
error: lifetime may not live long enough
--> $DIR/rpitit.rs:15:5
--> $DIR/rpitit.rs:13:5
|
LL | fn test<'a, 'b, T: for<'r> Foo<'r>>() {
| -- -- lifetime `'b` defined here
@ -30,7 +30,7 @@ LL | | );
= help: consider adding the following bound: `'a: 'b`
error: lifetime may not live long enough
--> $DIR/rpitit.rs:15:5
--> $DIR/rpitit.rs:13:5
|
LL | fn test<'a, 'b, T: for<'r> Foo<'r>>() {
| -- -- lifetime `'b` defined here

2
tests/ui/impl-trait/precise-capturing/self-capture.rs
View File

@ -1,5 +1,3 @@
#![feature(precise_capturing)]
trait Foo {
fn bar<'a>() -> impl Sized + use<Self>;
//~^ ERROR `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits

2
tests/ui/impl-trait/precise-capturing/self-capture.stderr
View File

@ -1,5 +1,5 @@
error: `use<...>` precise capturing syntax is currently not allowed in return-position `impl Trait` in traits
--> $DIR/self-capture.rs:4:34
--> $DIR/self-capture.rs:2:34
|
LL | fn bar<'a>() -> impl Sized + use<Self>;
| ^^^^^^^^^