diff options
Diffstat (limited to 'src/test/ui/impl-trait')
55 files changed, 977 insertions, 191 deletions
diff --git a/src/test/ui/impl-trait/auto-trait.rs b/src/test/ui/impl-trait/auto-trait.rs index afa95645a..35994e4a5 100644 --- a/src/test/ui/impl-trait/auto-trait.rs +++ b/src/test/ui/impl-trait/auto-trait.rs @@ -20,7 +20,6 @@ impl<T: Send> AnotherTrait for T {} // in the future.) impl AnotherTrait for D<OpaqueType> { //~^ ERROR conflicting implementations of trait `AnotherTrait` for type `D<OpaqueType>` - //~| ERROR cannot implement trait on type alias impl trait } fn main() {} diff --git a/src/test/ui/impl-trait/auto-trait.stderr b/src/test/ui/impl-trait/auto-trait.stderr index 5e10272b0..81009413c 100644 --- a/src/test/ui/impl-trait/auto-trait.stderr +++ b/src/test/ui/impl-trait/auto-trait.stderr @@ -7,18 +7,6 @@ LL | impl<T: Send> AnotherTrait for T {} LL | impl AnotherTrait for D<OpaqueType> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `D<OpaqueType>` -error: cannot implement trait on type alias impl trait - --> $DIR/auto-trait.rs:21:25 - | -LL | impl AnotherTrait for D<OpaqueType> { - | ^^^^^^^^^^ - | -note: type alias impl trait defined here - --> $DIR/auto-trait.rs:7:19 - | -LL | type OpaqueType = impl OpaqueTrait; - | ^^^^^^^^^^^^^^^^ - -error: aborting due to 2 previous errors +error: aborting due to previous error For more information about this error, try `rustc --explain E0119`. diff --git a/src/test/ui/impl-trait/bound-normalization-fail.stderr b/src/test/ui/impl-trait/bound-normalization-fail.stderr index bd8d3d3d2..a9fa2da56 100644 --- a/src/test/ui/impl-trait/bound-normalization-fail.stderr +++ b/src/test/ui/impl-trait/bound-normalization-fail.stderr @@ -19,17 +19,20 @@ help: consider constraining the associated type `<T as impl_trait::Trait>::Assoc LL | fn foo_fail<T: Trait<Assoc = ()>>() -> impl FooLike<Output = T::Assoc> { | ++++++++++++ -error[E0760]: `impl Trait` return type cannot contain a projection or `Self` that references lifetimes from a parent scope +error[E0658]: `impl Trait` return type cannot contain a projection or `Self` that references lifetimes from a parent scope --> $DIR/bound-normalization-fail.rs:41:41 | LL | fn foo2_fail<'a, T: Trait<'a>>() -> impl FooLike<Output = T::Assoc> { | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: see issue #103532 <https://github.com/rust-lang/rust/issues/103532> for more information + = help: add `#![feature(impl_trait_projections)]` to the crate attributes to enable -error[E0271]: type mismatch resolving `<Foo<()> as FooLike>::Output == <T as lifetimes::Trait<'static>>::Assoc` +error[E0271]: type mismatch resolving `<Foo<()> as FooLike>::Output == <T as lifetimes::Trait<'a>>::Assoc` --> $DIR/bound-normalization-fail.rs:41:41 | LL | fn foo2_fail<'a, T: Trait<'a>>() -> impl FooLike<Output = T::Assoc> { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type mismatch resolving `<Foo<()> as FooLike>::Output == <T as lifetimes::Trait<'static>>::Assoc` + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type mismatch resolving `<Foo<()> as FooLike>::Output == <T as lifetimes::Trait<'a>>::Assoc` ... LL | Foo(()) | ------- return type was inferred to be `Foo<()>` here @@ -40,13 +43,13 @@ note: expected this to be `()` LL | type Output = T; | ^ = note: expected unit type `()` - found associated type `<T as lifetimes::Trait<'static>>::Assoc` -help: consider constraining the associated type `<T as lifetimes::Trait<'static>>::Assoc` to `()` + found associated type `<T as lifetimes::Trait<'a>>::Assoc` +help: consider constraining the associated type `<T as lifetimes::Trait<'a>>::Assoc` to `()` | LL | fn foo2_fail<'a, T: Trait<'a, Assoc = ()>>() -> impl FooLike<Output = T::Assoc> { | ++++++++++++ error: aborting due to 3 previous errors -Some errors have detailed explanations: E0271, E0760. +Some errors have detailed explanations: E0271, E0658. For more information about an error, try `rustc --explain E0271`. diff --git a/src/test/ui/impl-trait/cross-return-site-inference.rs b/src/test/ui/impl-trait/cross-return-site-inference.rs index d881af9ed..00aed2ad9 100644 --- a/src/test/ui/impl-trait/cross-return-site-inference.rs +++ b/src/test/ui/impl-trait/cross-return-site-inference.rs @@ -30,16 +30,19 @@ fn baa(b: bool) -> impl std::fmt::Debug { fn muh() -> Result<(), impl std::fmt::Debug> { Err("whoops")?; - Ok(()) //~ ERROR type annotations needed + Ok(()) + //~^ ERROR type annotations needed } fn muh2() -> Result<(), impl std::fmt::Debug> { - return Err(From::from("foo")); //~ ERROR type annotations needed + return Err(From::from("foo")); + //~^ ERROR type annotations needed Ok(()) } fn muh3() -> Result<(), impl std::fmt::Debug> { - Err(From::from("foo")) //~ ERROR type annotations needed + Err(From::from("foo")) + //~^ ERROR type annotations needed } fn main() {} diff --git a/src/test/ui/impl-trait/cross-return-site-inference.stderr b/src/test/ui/impl-trait/cross-return-site-inference.stderr index 1ff777e65..766614e9e 100644 --- a/src/test/ui/impl-trait/cross-return-site-inference.stderr +++ b/src/test/ui/impl-trait/cross-return-site-inference.stderr @@ -10,7 +10,7 @@ LL | Ok::<(), E>(()) | +++++++++ error[E0282]: type annotations needed - --> $DIR/cross-return-site-inference.rs:37:12 + --> $DIR/cross-return-site-inference.rs:38:12 | LL | return Err(From::from("foo")); | ^^^ cannot infer type of the type parameter `E` declared on the enum `Result` @@ -21,7 +21,7 @@ LL | return Err::<(), E>(From::from("foo")); | +++++++++ error[E0282]: type annotations needed - --> $DIR/cross-return-site-inference.rs:42:5 + --> $DIR/cross-return-site-inference.rs:44:5 | LL | Err(From::from("foo")) | ^^^ cannot infer type of the type parameter `E` declared on the enum `Result` diff --git a/src/test/ui/impl-trait/deduce-signature-from-supertrait.rs b/src/test/ui/impl-trait/deduce-signature-from-supertrait.rs new file mode 100644 index 000000000..d2c347920 --- /dev/null +++ b/src/test/ui/impl-trait/deduce-signature-from-supertrait.rs @@ -0,0 +1,15 @@ +// check-pass + +#![feature(type_alias_impl_trait)] + +trait SuperExpectation: Fn(i32) {} + +impl<T: Fn(i32)> SuperExpectation for T {} + +type Foo = impl SuperExpectation; + +fn main() { + let _: Foo = |x| { + let _ = x.to_string(); + }; +} diff --git a/src/test/ui/impl-trait/equality.stderr b/src/test/ui/impl-trait/equality.stderr index 1841b8e5d..69f4cbbbf 100644 --- a/src/test/ui/impl-trait/equality.stderr +++ b/src/test/ui/impl-trait/equality.stderr @@ -30,15 +30,10 @@ LL | n + sum_to(n - 1) | = help: the trait `Add<impl Foo>` is not implemented for `u32` = help: the following other types implement trait `Add<Rhs>`: - <&'a f32 as Add<f32>> - <&'a f64 as Add<f64>> - <&'a i128 as Add<i128>> - <&'a i16 as Add<i16>> - <&'a i32 as Add<i32>> - <&'a i64 as Add<i64>> - <&'a i8 as Add<i8>> - <&'a isize as Add<isize>> - and 48 others + <&'a u32 as Add<u32>> + <&u32 as Add<&u32>> + <u32 as Add<&u32>> + <u32 as Add> error: aborting due to 2 previous errors; 1 warning emitted diff --git a/src/test/ui/impl-trait/feature-self-return-type.rs b/src/test/ui/impl-trait/feature-self-return-type.rs new file mode 100644 index 000000000..51877e9cc --- /dev/null +++ b/src/test/ui/impl-trait/feature-self-return-type.rs @@ -0,0 +1,102 @@ +// edition:2018 +#![feature(impl_trait_projections)] + +// This test checks that we emit the correct borrowck error when `Self` or a projection is used as +// a return type. See #61949 for context. + +mod with_self { + pub struct Foo<'a> { + pub bar: &'a i32, + } + + impl<'a> Foo<'a> { + pub fn new(_bar: &'a i32) -> impl Into<Self> { + Foo { + bar: &22 + } + } + } + + fn foo() { + let x = { + let bar = 22; + Foo::new(&bar).into() + //~^ ERROR `bar` does not live long enough + }; + drop(x); + } +} + +struct Foo<T>(T); + +trait FooLike { + type Output; +} + +impl<T> FooLike for Foo<T> { + type Output = T; +} + +mod impl_trait { + use super::*; + + trait Trait { + type Assoc; + + fn make_assoc(self) -> Self::Assoc; + } + + /// `T::Assoc` can't be normalized any further here. + fn foo<T: Trait>(x: T) -> impl FooLike<Output = T::Assoc> { + Foo(x.make_assoc()) + } + + impl<'a> Trait for &'a () { + type Assoc = &'a (); + + fn make_assoc(self) -> &'a () { &() } + } + + fn usage() { + let x = { + let y = (); + foo(&y) + //~^ ERROR `y` does not live long enough + }; + drop(x); + } +} + +// Same with lifetimes in the trait + +mod lifetimes { + use super::*; + + trait Trait<'a> { + type Assoc; + + fn make_assoc(self) -> Self::Assoc; + } + + /// Missing bound constraining `Assoc`, `T::Assoc` can't be normalized further. + fn foo<'a, T: Trait<'a>>(x: T) -> impl FooLike<Output = T::Assoc> { + Foo(x.make_assoc()) + } + + impl<'a> Trait<'a> for &'a () { + type Assoc = &'a (); + + fn make_assoc(self) -> &'a () { &() } + } + + fn usage() { + let x = { + let y = (); + foo(&y) + //~^ ERROR `y` does not live long enough + }; + drop(x); + } +} + +fn main() { } diff --git a/src/test/ui/impl-trait/feature-self-return-type.stderr b/src/test/ui/impl-trait/feature-self-return-type.stderr new file mode 100644 index 000000000..601e53b76 --- /dev/null +++ b/src/test/ui/impl-trait/feature-self-return-type.stderr @@ -0,0 +1,39 @@ +error[E0597]: `bar` does not live long enough + --> $DIR/feature-self-return-type.rs:23:22 + | +LL | let x = { + | - borrow later stored here +LL | let bar = 22; +LL | Foo::new(&bar).into() + | ^^^^ borrowed value does not live long enough +LL | +LL | }; + | - `bar` dropped here while still borrowed + +error[E0597]: `y` does not live long enough + --> $DIR/feature-self-return-type.rs:63:17 + | +LL | let x = { + | - borrow later stored here +LL | let y = (); +LL | foo(&y) + | ^^ borrowed value does not live long enough +LL | +LL | }; + | - `y` dropped here while still borrowed + +error[E0597]: `y` does not live long enough + --> $DIR/feature-self-return-type.rs:95:17 + | +LL | let x = { + | - borrow later stored here +LL | let y = (); +LL | foo(&y) + | ^^ borrowed value does not live long enough +LL | +LL | }; + | - `y` dropped here while still borrowed + +error: aborting due to 3 previous errors + +For more information about this error, try `rustc --explain E0597`. diff --git a/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.edition2021.stderr b/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.edition2021.stderr index 88e2520bf..30fbba168 100644 --- a/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.edition2021.stderr +++ b/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.edition2021.stderr @@ -9,13 +9,6 @@ help: add `dyn` keyword before this trait LL | fn ice() -> impl AsRef<dyn Fn(&())> { | +++ -error[E0277]: the trait bound `(): AsRef<(dyn for<'a> Fn(&'a ()) + 'static)>` is not satisfied - --> $DIR/generic-with-implicit-hrtb-without-dyn.rs:6:13 - | -LL | fn ice() -> impl AsRef<Fn(&())> { - | ^^^^^^^^^^^^^^^^^^^ the trait `AsRef<(dyn for<'a> Fn(&'a ()) + 'static)>` is not implemented for `()` - -error: aborting due to 2 previous errors +error: aborting due to previous error -Some errors have detailed explanations: E0277, E0782. -For more information about an error, try `rustc --explain E0277`. +For more information about this error, try `rustc --explain E0782`. diff --git a/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.rs b/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.rs index 5a922697f..bed81c4bc 100644 --- a/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.rs +++ b/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.rs @@ -4,8 +4,8 @@ #![allow(warnings)] fn ice() -> impl AsRef<Fn(&())> { - //~^ ERROR: the trait bound `(): AsRef<(dyn for<'a> Fn(&'a ()) + 'static)>` is not satisfied [E0277] - //[edition2021]~| ERROR: trait objects must include the `dyn` keyword [E0782] + //[edition2015]~^ ERROR: the trait bound `(): AsRef<(dyn for<'a> Fn(&'a ()) + 'static)>` is not satisfied [E0277] + //[edition2021]~^^ ERROR: trait objects must include the `dyn` keyword [E0782] todo!() } diff --git a/src/test/ui/impl-trait/impl-fn-hrtb-bounds-2.rs b/src/test/ui/impl-trait/impl-fn-hrtb-bounds-2.rs new file mode 100644 index 000000000..b0aeded0e --- /dev/null +++ b/src/test/ui/impl-trait/impl-fn-hrtb-bounds-2.rs @@ -0,0 +1,8 @@ +#![feature(impl_trait_in_fn_trait_return)] +use std::fmt::Debug; + +fn a() -> impl Fn(&u8) -> impl Debug { + |x| x //~ ERROR hidden type for `impl Debug` captures lifetime that does not appear in bounds +} + +fn main() {} diff --git a/src/test/ui/impl-trait/impl-fn-hrtb-bounds-2.stderr b/src/test/ui/impl-trait/impl-fn-hrtb-bounds-2.stderr new file mode 100644 index 000000000..433b76b7a --- /dev/null +++ b/src/test/ui/impl-trait/impl-fn-hrtb-bounds-2.stderr @@ -0,0 +1,11 @@ +error[E0700]: hidden type for `impl Debug` captures lifetime that does not appear in bounds + --> $DIR/impl-fn-hrtb-bounds-2.rs:5:9 + | +LL | |x| x + | --- ^ + | | + | hidden type `&u8` captures the anonymous lifetime #1 defined here + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0700`. diff --git a/src/test/ui/impl-trait/impl-fn-hrtb-bounds.rs b/src/test/ui/impl-trait/impl-fn-hrtb-bounds.rs new file mode 100644 index 000000000..527a4586f --- /dev/null +++ b/src/test/ui/impl-trait/impl-fn-hrtb-bounds.rs @@ -0,0 +1,24 @@ +#![feature(impl_trait_in_fn_trait_return)] +use std::fmt::Debug; + +fn a() -> impl Fn(&u8) -> (impl Debug + '_) { + //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet + |x| x +} + +fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) { + //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet + |x| x +} + +fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) { + //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet + |x| x +} + +fn d() -> impl Fn() -> (impl Debug + '_) { + //~^ ERROR missing lifetime specifier + || () +} + +fn main() {} diff --git a/src/test/ui/impl-trait/impl-fn-hrtb-bounds.stderr b/src/test/ui/impl-trait/impl-fn-hrtb-bounds.stderr new file mode 100644 index 000000000..443ffeb55 --- /dev/null +++ b/src/test/ui/impl-trait/impl-fn-hrtb-bounds.stderr @@ -0,0 +1,51 @@ +error[E0106]: missing lifetime specifier + --> $DIR/impl-fn-hrtb-bounds.rs:19:38 + | +LL | fn d() -> impl Fn() -> (impl Debug + '_) { + | ^^ expected named lifetime parameter + | + = help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from +help: consider using the `'static` lifetime + | +LL | fn d() -> impl Fn() -> (impl Debug + 'static) { + | ~~~~~~~ + +error: higher kinded lifetime bounds on nested opaque types are not supported yet + --> $DIR/impl-fn-hrtb-bounds.rs:4:41 + | +LL | fn a() -> impl Fn(&u8) -> (impl Debug + '_) { + | ^^ + | +note: lifetime declared here + --> $DIR/impl-fn-hrtb-bounds.rs:4:19 + | +LL | fn a() -> impl Fn(&u8) -> (impl Debug + '_) { + | ^ + +error: higher kinded lifetime bounds on nested opaque types are not supported yet + --> $DIR/impl-fn-hrtb-bounds.rs:9:52 + | +LL | fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) { + | ^^ + | +note: lifetime declared here + --> $DIR/impl-fn-hrtb-bounds.rs:9:20 + | +LL | fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) { + | ^^ + +error: higher kinded lifetime bounds on nested opaque types are not supported yet + --> $DIR/impl-fn-hrtb-bounds.rs:14:52 + | +LL | fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) { + | ^^ + | +note: lifetime declared here + --> $DIR/impl-fn-hrtb-bounds.rs:14:20 + | +LL | fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) { + | ^^ + +error: aborting due to 4 previous errors + +For more information about this error, try `rustc --explain E0106`. diff --git a/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.rs b/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.rs new file mode 100644 index 000000000..61303a5b2 --- /dev/null +++ b/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.rs @@ -0,0 +1,15 @@ +#![feature(impl_trait_in_fn_trait_return)] +use std::fmt::Debug; + +fn a() -> impl Fn(&u8) -> impl Debug + '_ { + //~^ ERROR ambiguous `+` in a type + //~| ERROR higher kinded lifetime bounds on nested opaque types are not supported yet + |x| x +} + +fn b() -> impl Fn() -> impl Debug + Send { + //~^ ERROR ambiguous `+` in a type + || () +} + +fn main() {} diff --git a/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.stderr b/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.stderr new file mode 100644 index 000000000..cf6e5ef7b --- /dev/null +++ b/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.stderr @@ -0,0 +1,26 @@ +error: ambiguous `+` in a type + --> $DIR/impl-fn-parsing-ambiguities.rs:4:27 + | +LL | fn a() -> impl Fn(&u8) -> impl Debug + '_ { + | ^^^^^^^^^^^^^^^ help: use parentheses to disambiguate: `(impl Debug + '_)` + +error: ambiguous `+` in a type + --> $DIR/impl-fn-parsing-ambiguities.rs:10:24 + | +LL | fn b() -> impl Fn() -> impl Debug + Send { + | ^^^^^^^^^^^^^^^^^ help: use parentheses to disambiguate: `(impl Debug + Send)` + +error: higher kinded lifetime bounds on nested opaque types are not supported yet + --> $DIR/impl-fn-parsing-ambiguities.rs:4:40 + | +LL | fn a() -> impl Fn(&u8) -> impl Debug + '_ { + | ^^ + | +note: lifetime declared here + --> $DIR/impl-fn-parsing-ambiguities.rs:4:19 + | +LL | fn a() -> impl Fn(&u8) -> impl Debug + '_ { + | ^ + +error: aborting due to 3 previous errors + diff --git a/src/test/ui/impl-trait/impl-fn-predefined-lifetimes.rs b/src/test/ui/impl-trait/impl-fn-predefined-lifetimes.rs new file mode 100644 index 000000000..157786623 --- /dev/null +++ b/src/test/ui/impl-trait/impl-fn-predefined-lifetimes.rs @@ -0,0 +1,15 @@ +#![feature(impl_trait_in_fn_trait_return)] +use std::fmt::Debug; + +fn a<'a>() -> impl Fn(&'a u8) -> (impl Debug + '_) { + //~^ ERROR cannot resolve opaque type + + |x| x + //~^ ERROR concrete type differs from previous defining opaque type use +} + +fn _b<'a>() -> impl Fn(&'a u8) -> (impl Debug + 'a) { + a() +} + +fn main() {} diff --git a/src/test/ui/impl-trait/impl-fn-predefined-lifetimes.stderr b/src/test/ui/impl-trait/impl-fn-predefined-lifetimes.stderr new file mode 100644 index 000000000..c19420bbb --- /dev/null +++ b/src/test/ui/impl-trait/impl-fn-predefined-lifetimes.stderr @@ -0,0 +1,21 @@ +error: concrete type differs from previous defining opaque type use + --> $DIR/impl-fn-predefined-lifetimes.rs:7:9 + | +LL | |x| x + | ^ expected `impl Debug + '_`, got `&u8` + | +note: previous use here + --> $DIR/impl-fn-predefined-lifetimes.rs:7:5 + | +LL | |x| x + | ^^^^^ + +error[E0720]: cannot resolve opaque type + --> $DIR/impl-fn-predefined-lifetimes.rs:4:35 + | +LL | fn a<'a>() -> impl Fn(&'a u8) -> (impl Debug + '_) { + | ^^^^^^^^^^^^^^^ cannot resolve opaque type + +error: aborting due to 2 previous errors + +For more information about this error, try `rustc --explain E0720`. diff --git a/src/test/ui/impl-trait/impl_fn_associativity.rs b/src/test/ui/impl-trait/impl_fn_associativity.rs new file mode 100644 index 000000000..71a8f9c77 --- /dev/null +++ b/src/test/ui/impl-trait/impl_fn_associativity.rs @@ -0,0 +1,26 @@ +// run-pass +#![feature(impl_trait_in_fn_trait_return)] +use std::fmt::Debug; + +fn f_debug() -> impl Fn() -> impl Debug { + || () +} + +fn ff_debug() -> impl Fn() -> impl Fn() -> impl Debug { + || f_debug() +} + +fn multi() -> impl Fn() -> (impl Debug + Send) { + || () +} + +fn main() { + // Check that `ff_debug` is `() -> (() -> Debug)` and not `(() -> ()) -> Debug` + let debug = ff_debug()()(); + assert_eq!(format!("{:?}", debug), "()"); + + let x = multi()(); + assert_eq!(format!("{:?}", x), "()"); + fn assert_send(_: &impl Send) {} + assert_send(&x); +} diff --git a/src/test/ui/impl-trait/in-trait/generics-mismatch.rs b/src/test/ui/impl-trait/in-trait/generics-mismatch.rs new file mode 100644 index 000000000..cc0fc720e --- /dev/null +++ b/src/test/ui/impl-trait/in-trait/generics-mismatch.rs @@ -0,0 +1,17 @@ +#![feature(return_position_impl_trait_in_trait)] +#![allow(incomplete_features)] + +struct U; + +trait Foo { + fn bar(&self) -> impl Sized; +} + +impl Foo for U { + fn bar<T>(&self) {} + //~^ ERROR method `bar` has 1 type parameter but its trait declaration has 0 type parameters +} + +fn main() { + U.bar(); +} diff --git a/src/test/ui/impl-trait/in-trait/generics-mismatch.stderr b/src/test/ui/impl-trait/in-trait/generics-mismatch.stderr new file mode 100644 index 000000000..cd42683e0 --- /dev/null +++ b/src/test/ui/impl-trait/in-trait/generics-mismatch.stderr @@ -0,0 +1,12 @@ +error[E0049]: method `bar` has 1 type parameter but its trait declaration has 0 type parameters + --> $DIR/generics-mismatch.rs:11:12 + | +LL | fn bar(&self) -> impl Sized; + | - expected 0 type parameters +... +LL | fn bar<T>(&self) {} + | ^ found 1 type parameter + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0049`. diff --git a/src/test/ui/impl-trait/in-trait/method-signature-matches.rs b/src/test/ui/impl-trait/in-trait/method-signature-matches.rs new file mode 100644 index 000000000..c848ee3f6 --- /dev/null +++ b/src/test/ui/impl-trait/in-trait/method-signature-matches.rs @@ -0,0 +1,51 @@ +// edition: 2021 + +#![feature(return_position_impl_trait_in_trait, async_fn_in_trait)] +#![allow(incomplete_features)] + +trait Uwu { + fn owo(x: ()) -> impl Sized; +} + +impl Uwu for () { + fn owo(_: u8) {} + //~^ ERROR method `owo` has an incompatible type for trait +} + +trait AsyncUwu { + async fn owo(x: ()) {} +} + +impl AsyncUwu for () { + async fn owo(_: u8) {} + //~^ ERROR method `owo` has an incompatible type for trait +} + +trait TooMuch { + fn calm_down_please() -> impl Sized; +} + +impl TooMuch for () { + fn calm_down_please(_: (), _: (), _: ()) {} + //~^ ERROR method `calm_down_please` has 3 parameters but the declaration in trait `TooMuch::calm_down_please` has 0 +} + +trait TooLittle { + fn come_on_a_little_more_effort(_: (), _: (), _: ()) -> impl Sized; +} + +impl TooLittle for () { + fn come_on_a_little_more_effort() {} + //~^ ERROR method `come_on_a_little_more_effort` has 0 parameters but the declaration in trait `TooLittle::come_on_a_little_more_effort` has 3 +} + +trait Lifetimes { + fn early<'early, T>(x: &'early T) -> impl Sized; +} + +impl Lifetimes for () { + fn early<'late, T>(_: &'late ()) {} + //~^ ERROR method `early` has an incompatible type for trait +} + +fn main() {} diff --git a/src/test/ui/impl-trait/in-trait/method-signature-matches.stderr b/src/test/ui/impl-trait/in-trait/method-signature-matches.stderr new file mode 100644 index 000000000..2b32c52c8 --- /dev/null +++ b/src/test/ui/impl-trait/in-trait/method-signature-matches.stderr @@ -0,0 +1,84 @@ +error[E0053]: method `owo` has an incompatible type for trait + --> $DIR/method-signature-matches.rs:11:15 + | +LL | fn owo(_: u8) {} + | ^^ + | | + | expected `()`, found `u8` + | help: change the parameter type to match the trait: `()` + | +note: type in trait + --> $DIR/method-signature-matches.rs:7:15 + | +LL | fn owo(x: ()) -> impl Sized; + | ^^ + = note: expected fn pointer `fn(())` + found fn pointer `fn(u8)` + +error[E0053]: method `owo` has an incompatible type for trait + --> $DIR/method-signature-matches.rs:20:21 + | +LL | async fn owo(_: u8) {} + | ^^ + | | + | expected `()`, found `u8` + | help: change the parameter type to match the trait: `()` + | +note: while checking the return type of the `async fn` + --> $DIR/method-signature-matches.rs:20:25 + | +LL | async fn owo(_: u8) {} + | ^ checked the `Output` of this `async fn`, expected opaque type +note: while checking the return type of the `async fn` + --> $DIR/method-signature-matches.rs:20:25 + | +LL | async fn owo(_: u8) {} + | ^ checked the `Output` of this `async fn`, found opaque type +note: type in trait + --> $DIR/method-signature-matches.rs:16:21 + | +LL | async fn owo(x: ()) {} + | ^^ + = note: expected fn pointer `fn(()) -> _` + found fn pointer `fn(u8) -> _` + +error[E0050]: method `calm_down_please` has 3 parameters but the declaration in trait `TooMuch::calm_down_please` has 0 + --> $DIR/method-signature-matches.rs:29:28 + | +LL | fn calm_down_please() -> impl Sized; + | ------------------------------------ trait requires 0 parameters +... +LL | fn calm_down_please(_: (), _: (), _: ()) {} + | ^^^^^^^^^^^^^^^^ expected 0 parameters, found 3 + +error[E0050]: method `come_on_a_little_more_effort` has 0 parameters but the declaration in trait `TooLittle::come_on_a_little_more_effort` has 3 + --> $DIR/method-signature-matches.rs:38:5 + | +LL | fn come_on_a_little_more_effort(_: (), _: (), _: ()) -> impl Sized; + | ---------------- trait requires 3 parameters +... +LL | fn come_on_a_little_more_effort() {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected 3 parameters, found 0 + +error[E0053]: method `early` has an incompatible type for trait + --> $DIR/method-signature-matches.rs:47:27 + | +LL | fn early<'late, T>(_: &'late ()) {} + | - ^^^^^^^^^ + | | | + | | expected type parameter `T`, found `()` + | | help: change the parameter type to match the trait: `&'early T` + | this type parameter + | +note: type in trait + --> $DIR/method-signature-matches.rs:43:28 + | +LL | fn early<'early, T>(x: &'early T) -> impl Sized; + | ^^^^^^^^^ + = note: expected fn pointer `fn(&'early T)` + found fn pointer `fn(&())` + +error: aborting due to 5 previous errors + +Some errors have detailed explanations: E0050, E0053. +For more information about an error, try `rustc --explain E0050`. diff --git a/src/test/ui/impl-trait/in-trait/object-safety.stderr b/src/test/ui/impl-trait/in-trait/object-safety.stderr index 9a1554b5e..ca0e760ff 100644 --- a/src/test/ui/impl-trait/in-trait/object-safety.stderr +++ b/src/test/ui/impl-trait/in-trait/object-safety.stderr @@ -5,12 +5,12 @@ LL | let i = Box::new(42_u32) as Box<dyn Foo>; | ^^^^^^^^^^^^ `Foo` cannot be made into an object | note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> - --> $DIR/object-safety.rs:7:8 + --> $DIR/object-safety.rs:7:22 | LL | trait Foo { | --- this trait cannot be made into an object... LL | fn baz(&self) -> impl Debug; - | ^^^ ...because method `baz` references an `impl Trait` type in its return type + | ^^^^^^^^^^ ...because method `baz` references an `impl Trait` type in its return type = help: consider moving `baz` to another trait error[E0038]: the trait `Foo` cannot be made into an object @@ -20,12 +20,12 @@ LL | let s = i.baz(); | ^^^^^^^ `Foo` cannot be made into an object | note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> - --> $DIR/object-safety.rs:7:8 + --> $DIR/object-safety.rs:7:22 | LL | trait Foo { | --- this trait cannot be made into an object... LL | fn baz(&self) -> impl Debug; - | ^^^ ...because method `baz` references an `impl Trait` type in its return type + | ^^^^^^^^^^ ...because method `baz` references an `impl Trait` type in its return type = help: consider moving `baz` to another trait error[E0038]: the trait `Foo` cannot be made into an object @@ -35,12 +35,12 @@ LL | let i = Box::new(42_u32) as Box<dyn Foo>; | ^^^^^^^^^^^^^^^^ `Foo` cannot be made into an object | note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety> - --> $DIR/object-safety.rs:7:8 + --> $DIR/object-safety.rs:7:22 | LL | trait Foo { | --- this trait cannot be made into an object... LL | fn baz(&self) -> impl Debug; - | ^^^ ...because method `baz` references an `impl Trait` type in its return type + | ^^^^^^^^^^ ...because method `baz` references an `impl Trait` type in its return type = help: consider moving `baz` to another trait = note: required for `Box<u32>` to implement `CoerceUnsized<Box<dyn Foo>>` = note: required by cast to type `Box<dyn Foo>` diff --git a/src/test/ui/impl-trait/in-trait/specialization-broken.rs b/src/test/ui/impl-trait/in-trait/specialization-broken.rs new file mode 100644 index 000000000..9d27d3710 --- /dev/null +++ b/src/test/ui/impl-trait/in-trait/specialization-broken.rs @@ -0,0 +1,26 @@ +// FIXME(compiler-errors): I'm not exactly sure if this is expected to pass or not. +// But we fixed an ICE anyways. + +#![feature(specialization)] +#![feature(return_position_impl_trait_in_trait)] +#![allow(incomplete_features)] + +trait Foo { + fn bar(&self) -> impl Sized; +} + +default impl<U> Foo for U +where + U: Copy, +{ + fn bar(&self) -> U { + //~^ ERROR method `bar` has an incompatible type for trait + *self + } +} + +impl Foo for i32 {} + +fn main() { + 1i32.bar(); +} diff --git a/src/test/ui/impl-trait/in-trait/specialization-broken.stderr b/src/test/ui/impl-trait/in-trait/specialization-broken.stderr new file mode 100644 index 000000000..a30e6346b --- /dev/null +++ b/src/test/ui/impl-trait/in-trait/specialization-broken.stderr @@ -0,0 +1,23 @@ +error[E0053]: method `bar` has an incompatible type for trait + --> $DIR/specialization-broken.rs:16:22 + | +LL | default impl<U> Foo for U + | - this type parameter +... +LL | fn bar(&self) -> U { + | ^ + | | + | expected associated type, found type parameter `U` + | help: change the output type to match the trait: `impl Sized` + | +note: type in trait + --> $DIR/specialization-broken.rs:9:22 + | +LL | fn bar(&self) -> impl Sized; + | ^^^^^^^^^^ + = note: expected fn pointer `fn(&U) -> impl Sized` + found fn pointer `fn(&U) -> U` + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0053`. diff --git a/src/test/ui/impl-trait/in-trait/specialization-substs-remap.rs b/src/test/ui/impl-trait/in-trait/specialization-substs-remap.rs new file mode 100644 index 000000000..c9ee877db --- /dev/null +++ b/src/test/ui/impl-trait/in-trait/specialization-substs-remap.rs @@ -0,0 +1,24 @@ +// check-pass + +#![feature(specialization)] +#![feature(return_position_impl_trait_in_trait)] +#![allow(incomplete_features)] + +trait Foo { + fn bar(&self) -> impl Sized; +} + +impl<U> Foo for U +where + U: Copy, +{ + fn bar(&self) -> U { + *self + } +} + +impl Foo for i32 {} + +fn main() { + let _: i32 = 1i32.bar(); +} diff --git a/src/test/ui/impl-trait/in-trait/trait-more-generics-than-impl.rs b/src/test/ui/impl-trait/in-trait/trait-more-generics-than-impl.rs new file mode 100644 index 000000000..0bbe50ea6 --- /dev/null +++ b/src/test/ui/impl-trait/in-trait/trait-more-generics-than-impl.rs @@ -0,0 +1,17 @@ +#![feature(return_position_impl_trait_in_trait)] +#![allow(incomplete_features)] + +struct S; + +trait Foo { + fn bar<T>() -> impl Sized; +} + +impl Foo for S { + fn bar() -> impl Sized {} + //~^ ERROR method `bar` has 0 type parameters but its trait declaration has 1 type parameter +} + +fn main() { + S::bar(); +} diff --git a/src/test/ui/impl-trait/in-trait/trait-more-generics-than-impl.stderr b/src/test/ui/impl-trait/in-trait/trait-more-generics-than-impl.stderr new file mode 100644 index 000000000..8ff54cad9 --- /dev/null +++ b/src/test/ui/impl-trait/in-trait/trait-more-generics-than-impl.stderr @@ -0,0 +1,12 @@ +error[E0049]: method `bar` has 0 type parameters but its trait declaration has 1 type parameter + --> $DIR/trait-more-generics-than-impl.rs:11:11 + | +LL | fn bar<T>() -> impl Sized; + | - expected 1 type parameter +... +LL | fn bar() -> impl Sized {} + | ^ found 0 type parameters + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0049`. diff --git a/src/test/ui/impl-trait/in-trait/where-clause.rs b/src/test/ui/impl-trait/in-trait/where-clause.rs new file mode 100644 index 000000000..87bac519c --- /dev/null +++ b/src/test/ui/impl-trait/in-trait/where-clause.rs @@ -0,0 +1,24 @@ +// check-pass +// edition: 2021 + +#![feature(return_position_impl_trait_in_trait)] +#![allow(incomplete_features)] + +use std::fmt::Debug; + +trait Foo<Item> { + fn foo<'a>(&'a self) -> impl Debug + where + Item: 'a; +} + +impl<Item, D: Debug + Clone> Foo<Item> for D { + fn foo<'a>(&'a self) -> impl Debug + where + Item: 'a, + { + self.clone() + } +} + +fn main() {} diff --git a/src/test/ui/impl-trait/issue-35668.rs b/src/test/ui/impl-trait/issue-35668.rs new file mode 100644 index 000000000..c970163fc --- /dev/null +++ b/src/test/ui/impl-trait/issue-35668.rs @@ -0,0 +1,12 @@ +fn func<'a, T>(a: &'a [T]) -> impl Iterator<Item=&'a T> { + a.iter().map(|a| a*a) + //~^ ERROR cannot multiply `&T` by `&T` +} + +fn main() { + let a = (0..30).collect::<Vec<_>>(); + + for k in func(&a) { + println!("{}", k); + } +} diff --git a/src/test/ui/impl-trait/issue-35668.stderr b/src/test/ui/impl-trait/issue-35668.stderr new file mode 100644 index 000000000..84add5799 --- /dev/null +++ b/src/test/ui/impl-trait/issue-35668.stderr @@ -0,0 +1,16 @@ +error[E0369]: cannot multiply `&T` by `&T` + --> $DIR/issue-35668.rs:2:23 + | +LL | a.iter().map(|a| a*a) + | -^- &T + | | + | &T + | +help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement + | +LL | fn func<'a, T>(a: &'a [T]) -> impl Iterator<Item=&'a T> where &T: Mul<&T> { + | +++++++++++++++++ + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0369`. diff --git a/src/test/ui/impl-trait/issue-49556.rs b/src/test/ui/impl-trait/issue-49556.rs new file mode 100644 index 000000000..c8c172f0e --- /dev/null +++ b/src/test/ui/impl-trait/issue-49556.rs @@ -0,0 +1,13 @@ +// check-pass +fn iter<'a>(data: &'a [usize]) -> impl Iterator<Item = usize> + 'a { + data.iter() + .map( + |x| x // fn(&'a usize) -> &'a usize + ) + .map( + |x| *x // fn(&'a usize) -> usize + ) +} + +fn main() { +} diff --git a/src/test/ui/impl-trait/issue-55872-3.rs b/src/test/ui/impl-trait/issue-55872-3.rs index 3ffce85e6..91811df93 100644 --- a/src/test/ui/impl-trait/issue-55872-3.rs +++ b/src/test/ui/impl-trait/issue-55872-3.rs @@ -12,7 +12,7 @@ pub trait Bar { impl<S> Bar for S { type E = impl std::marker::Copy; fn foo<T>() -> Self::E { - //~^ ERROR the trait bound `impl Future<Output = ()>: Copy` is not satisfied [E0277] + //~^ ERROR : Copy` is not satisfied [E0277] async {} } } diff --git a/src/test/ui/impl-trait/issue-55872-3.stderr b/src/test/ui/impl-trait/issue-55872-3.stderr index 6ab540e87..c6e10f0f3 100644 --- a/src/test/ui/impl-trait/issue-55872-3.stderr +++ b/src/test/ui/impl-trait/issue-55872-3.stderr @@ -1,8 +1,8 @@ -error[E0277]: the trait bound `impl Future<Output = ()>: Copy` is not satisfied +error[E0277]: the trait bound `[async block@$DIR/issue-55872-3.rs:16:9: 16:17]: Copy` is not satisfied --> $DIR/issue-55872-3.rs:14:20 | LL | fn foo<T>() -> Self::E { - | ^^^^^^^ the trait `Copy` is not implemented for `impl Future<Output = ()>` + | ^^^^^^^ the trait `Copy` is not implemented for `[async block@$DIR/issue-55872-3.rs:16:9: 16:17]` error: aborting due to previous error diff --git a/src/test/ui/impl-trait/issues/issue-104815.rs b/src/test/ui/impl-trait/issues/issue-104815.rs new file mode 100644 index 000000000..7a9826a8d --- /dev/null +++ b/src/test/ui/impl-trait/issues/issue-104815.rs @@ -0,0 +1,66 @@ +// check-pass + +struct It; + +struct Data { + items: Vec<It>, +} + +impl Data { + fn new() -> Self { + Self { + items: vec![It, It], + } + } + + fn content(&self) -> impl Iterator<Item = &It> { + self.items.iter() + } +} + +struct Container<'a> { + name: String, + resolver: Box<dyn Resolver + 'a>, +} + +impl<'a> Container<'a> { + fn new<R: Resolver + 'a>(name: &str, resolver: R) -> Self { + Self { + name: name.to_owned(), + resolver: Box::new(resolver), + } + } +} + +trait Resolver {} + +impl<R: Resolver> Resolver for &R {} + +impl Resolver for It {} + +fn get<'a>(mut items: impl Iterator<Item = &'a It>) -> impl Resolver + 'a { + items.next().unwrap() +} + +fn get2<'a, 'b: 'b>(mut items: impl Iterator<Item = &'a It>) -> impl Resolver + 'a { + items.next().unwrap() +} + +fn main() { + let data = Data::new(); + let resolver = get(data.content()); + + let _ = ["a", "b"] + .iter() + .map(|&n| Container::new(n, &resolver)) + .map(|c| c.name) + .collect::<Vec<_>>(); + + let resolver = get2(data.content()); + + let _ = ["a", "b"] + .iter() + .map(|&n| Container::new(n, &resolver)) + .map(|c| c.name) + .collect::<Vec<_>>(); +} diff --git a/src/test/ui/impl-trait/issues/issue-105826.rs b/src/test/ui/impl-trait/issues/issue-105826.rs new file mode 100644 index 000000000..06dc2d4c8 --- /dev/null +++ b/src/test/ui/impl-trait/issues/issue-105826.rs @@ -0,0 +1,39 @@ +// check-pass + +use std::io::Write; + +struct A(Vec<u8>); + +struct B<'a> { + one: &'a mut A, + two: &'a mut Vec<u8>, + three: Vec<u8>, +} + +impl<'a> B<'a> { + fn one(&mut self) -> &mut impl Write { + &mut self.one.0 + } + fn two(&mut self) -> &mut impl Write { + &mut *self.two + } + fn three(&mut self) -> &mut impl Write { + &mut self.three + } +} + +struct C<'a>(B<'a>); + +impl<'a> C<'a> { + fn one(&mut self) -> &mut impl Write { + self.0.one() + } + fn two(&mut self) -> &mut impl Write { + self.0.two() + } + fn three(&mut self) -> &mut impl Write { + self.0.three() + } +} + +fn main() {} diff --git a/src/test/ui/impl-trait/issues/issue-78722.rs b/src/test/ui/impl-trait/issues/issue-78722.rs index 9ee1ba3d3..78233f300 100644 --- a/src/test/ui/impl-trait/issues/issue-78722.rs +++ b/src/test/ui/impl-trait/issues/issue-78722.rs @@ -7,7 +7,7 @@ type F = impl core::future::Future<Output = u8>; struct Bug { V1: [(); { fn concrete_use() -> F { - //~^ ERROR expected `impl Future<Output = ()>` to be a future that resolves to `u8`, but it resolves to `()` + //~^ ERROR to be a future that resolves to `u8`, but it resolves to `()` async {} } let f: F = async { 1 }; diff --git a/src/test/ui/impl-trait/issues/issue-78722.stderr b/src/test/ui/impl-trait/issues/issue-78722.stderr index a96994f5a..c00df8087 100644 --- a/src/test/ui/impl-trait/issues/issue-78722.stderr +++ b/src/test/ui/impl-trait/issues/issue-78722.stderr @@ -16,7 +16,7 @@ LL | let f: F = async { 1 }; LL | }], | - value is dropped here -error[E0271]: expected `impl Future<Output = ()>` to be a future that resolves to `u8`, but it resolves to `()` +error[E0271]: expected `[async block@$DIR/issue-78722.rs:11:13: 11:21]` to be a future that resolves to `u8`, but it resolves to `()` --> $DIR/issue-78722.rs:9:30 | LL | fn concrete_use() -> F { diff --git a/src/test/ui/impl-trait/issues/issue-92305.rs b/src/test/ui/impl-trait/issues/issue-92305.rs index 1518c116b..4a89238d0 100644 --- a/src/test/ui/impl-trait/issues/issue-92305.rs +++ b/src/test/ui/impl-trait/issues/issue-92305.rs @@ -4,11 +4,10 @@ use std::iter; fn f<T>(data: &[T]) -> impl Iterator<Item = Vec> { //~^ ERROR: missing generics for struct `Vec` [E0107] - iter::empty() //~ ERROR: type annotations needed [E0282] + iter::empty() } fn g<T>(data: &[T], target: T) -> impl Iterator<Item = Vec<T>> { - //~^ ERROR: type annotations needed [E0282] f(data).filter(|x| x == target) } diff --git a/src/test/ui/impl-trait/issues/issue-92305.stderr b/src/test/ui/impl-trait/issues/issue-92305.stderr index e8575b76b..34d5c2d61 100644 --- a/src/test/ui/impl-trait/issues/issue-92305.stderr +++ b/src/test/ui/impl-trait/issues/issue-92305.stderr @@ -14,24 +14,6 @@ help: add missing generic argument LL | fn f<T>(data: &[T]) -> impl Iterator<Item = Vec<T>> { | ~~~~~~ -error[E0282]: type annotations needed - --> $DIR/issue-92305.rs:7:5 - | -LL | iter::empty() - | ^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `empty` - | -help: consider specifying the generic argument - | -LL | iter::empty::<T>() - | +++++ - -error[E0282]: type annotations needed - --> $DIR/issue-92305.rs:10:35 - | -LL | fn g<T>(data: &[T], target: T) -> impl Iterator<Item = Vec<T>> { - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type - -error: aborting due to 3 previous errors +error: aborting due to previous error -Some errors have detailed explanations: E0107, E0282. -For more information about an error, try `rustc --explain E0107`. +For more information about this error, try `rustc --explain E0107`. diff --git a/src/test/ui/impl-trait/negative-reasoning.rs b/src/test/ui/impl-trait/negative-reasoning.rs index da69bb349..70e24a3a9 100644 --- a/src/test/ui/impl-trait/negative-reasoning.rs +++ b/src/test/ui/impl-trait/negative-reasoning.rs @@ -18,7 +18,6 @@ impl<T: std::fmt::Debug> AnotherTrait for T {} // This is in error, because we cannot assume that `OpaqueType: !Debug` impl AnotherTrait for D<OpaqueType> { //~^ ERROR conflicting implementations of trait `AnotherTrait` for type `D<OpaqueType>` - //~| ERROR cannot implement trait on type alias impl trait } fn main() {} diff --git a/src/test/ui/impl-trait/negative-reasoning.stderr b/src/test/ui/impl-trait/negative-reasoning.stderr index 479b45185..6b8cc9e73 100644 --- a/src/test/ui/impl-trait/negative-reasoning.stderr +++ b/src/test/ui/impl-trait/negative-reasoning.stderr @@ -9,18 +9,6 @@ LL | impl AnotherTrait for D<OpaqueType> { | = note: upstream crates may add a new impl of trait `std::fmt::Debug` for type `OpaqueType` in future versions -error: cannot implement trait on type alias impl trait - --> $DIR/negative-reasoning.rs:19:25 - | -LL | impl AnotherTrait for D<OpaqueType> { - | ^^^^^^^^^^ - | -note: type alias impl trait defined here - --> $DIR/negative-reasoning.rs:7:19 - | -LL | type OpaqueType = impl OpaqueTrait; - | ^^^^^^^^^^^^^^^^ - -error: aborting due to 2 previous errors +error: aborting due to previous error For more information about this error, try `rustc --explain E0119`. diff --git a/src/test/ui/impl-trait/nested-return-type4.rs b/src/test/ui/impl-trait/nested-return-type4.rs new file mode 100644 index 000000000..cec70bb1a --- /dev/null +++ b/src/test/ui/impl-trait/nested-return-type4.rs @@ -0,0 +1,8 @@ +// edition: 2021 + +fn test<'s: 's>(s: &'s str) -> impl std::future::Future<Output = impl Sized> { + async move { let _s = s; } + //~^ ERROR hidden type for `impl Future<Output = impl Sized>` captures lifetime that does not appear in bounds +} + +fn main() {} diff --git a/src/test/ui/impl-trait/nested-return-type4.stderr b/src/test/ui/impl-trait/nested-return-type4.stderr new file mode 100644 index 000000000..e761a60e7 --- /dev/null +++ b/src/test/ui/impl-trait/nested-return-type4.stderr @@ -0,0 +1,20 @@ +error[E0700]: hidden type for `impl Future<Output = impl Sized>` captures lifetime that does not appear in bounds + --> $DIR/nested-return-type4.rs:4:5 + | +LL | fn test<'s: 's>(s: &'s str) -> impl std::future::Future<Output = impl Sized> { + | -- hidden type `[async block@$DIR/nested-return-type4.rs:4:5: 4:31]` captures the lifetime `'s` as defined here +LL | async move { let _s = s; } + | ^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: to declare that `impl Future<Output = impl Sized>` captures `'s`, you can add an explicit `'s` lifetime bound + | +LL | fn test<'s: 's>(s: &'s str) -> impl std::future::Future<Output = impl Sized> + 's { + | ++++ +help: to declare that `impl Sized` captures `'s`, you can add an explicit `'s` lifetime bound + | +LL | fn test<'s: 's>(s: &'s str) -> impl std::future::Future<Output = impl Sized + 's> { + | ++++ + +error: aborting due to previous error + +For more information about this error, try `rustc --explain E0700`. diff --git a/src/test/ui/impl-trait/nested-rpit-hrtb.rs b/src/test/ui/impl-trait/nested-rpit-hrtb.rs index abf6a7e95..a5db10d3a 100644 --- a/src/test/ui/impl-trait/nested-rpit-hrtb.rs +++ b/src/test/ui/impl-trait/nested-rpit-hrtb.rs @@ -35,26 +35,26 @@ fn one_hrtb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'a> {} fn one_hrtb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl Qux<'a>> {} //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet -// This should pass. +// This should resolve. fn one_hrtb_mention_fn_trait_param<'b>() -> impl for<'a> Foo<'a, Assoc = impl Qux<'b>> {} -// This should pass. +// This should resolve. fn one_hrtb_mention_fn_outlives<'b>() -> impl for<'a> Foo<'a, Assoc = impl Sized + 'b> {} -// This should pass. +// This should resolve. fn one_hrtb_mention_fn_trait_param_uses<'b>() -> impl for<'a> Bar<'a, Assoc = impl Qux<'b>> {} -// This should pass. +// This should resolve. fn one_hrtb_mention_fn_outlives_uses<'b>() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'b> {} -// This should pass. +// This should resolve. fn two_htrb_trait_param() -> impl for<'a> Foo<'a, Assoc = impl for<'b> Qux<'b>> {} // `'b` is not in scope for the outlives bound. fn two_htrb_outlives() -> impl for<'a> Foo<'a, Assoc = impl for<'b> Sized + 'b> {} //~^ ERROR use of undeclared lifetime name `'b` [E0261] -// This should pass. +// This should resolve. fn two_htrb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl for<'b> Qux<'b>> {} // `'b` is not in scope for the outlives bound. diff --git a/src/test/ui/impl-trait/nested_impl_trait.rs b/src/test/ui/impl-trait/nested_impl_trait.rs index 85c6f8c46..e95fab3b6 100644 --- a/src/test/ui/impl-trait/nested_impl_trait.rs +++ b/src/test/ui/impl-trait/nested_impl_trait.rs @@ -1,3 +1,4 @@ +#![feature(impl_trait_in_fn_trait_return)] use std::fmt::Debug; fn fine(x: impl Into<u32>) -> impl Into<u32> { x } @@ -25,8 +26,7 @@ fn allowed_in_assoc_type() -> impl Iterator<Item=impl Fn()> { } fn allowed_in_ret_type() -> impl Fn() -> impl Into<u32> { -//~^ `impl Trait` only allowed in function and inherent method return types - || 5 + || 5u8 } fn main() {} diff --git a/src/test/ui/impl-trait/nested_impl_trait.stderr b/src/test/ui/impl-trait/nested_impl_trait.stderr index 3291cad68..9a8f5a340 100644 --- a/src/test/ui/impl-trait/nested_impl_trait.stderr +++ b/src/test/ui/impl-trait/nested_impl_trait.stderr @@ -1,5 +1,5 @@ error[E0666]: nested `impl Trait` is not allowed - --> $DIR/nested_impl_trait.rs:5:56 + --> $DIR/nested_impl_trait.rs:6:56 | LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x } | ----------^^^^^^^^^^- @@ -8,7 +8,7 @@ LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x } | outer `impl Trait` error[E0666]: nested `impl Trait` is not allowed - --> $DIR/nested_impl_trait.rs:9:42 + --> $DIR/nested_impl_trait.rs:10:42 | LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {} | ----------^^^^^^^^^^- @@ -17,7 +17,7 @@ LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {} | outer `impl Trait` error[E0666]: nested `impl Trait` is not allowed - --> $DIR/nested_impl_trait.rs:13:37 + --> $DIR/nested_impl_trait.rs:14:37 | LL | fn bad_in_arg_position(_: impl Into<impl Debug>) { } | ----------^^^^^^^^^^- @@ -26,7 +26,7 @@ LL | fn bad_in_arg_position(_: impl Into<impl Debug>) { } | outer `impl Trait` error[E0666]: nested `impl Trait` is not allowed - --> $DIR/nested_impl_trait.rs:18:44 + --> $DIR/nested_impl_trait.rs:19:44 | LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x } | ----------^^^^^^^^^^- @@ -35,19 +35,13 @@ LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x } | outer `impl Trait` error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer return - --> $DIR/nested_impl_trait.rs:9:32 + --> $DIR/nested_impl_trait.rs:10:32 | LL | fn bad_in_fn_syntax(x: fn() -> impl Into<impl Debug>) {} | ^^^^^^^^^^^^^^^^^^^^^ -error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return - --> $DIR/nested_impl_trait.rs:27:42 - | -LL | fn allowed_in_ret_type() -> impl Fn() -> impl Into<u32> { - | ^^^^^^^^^^^^^^ - error[E0277]: the trait bound `impl Debug: From<impl Into<u32>>` is not satisfied - --> $DIR/nested_impl_trait.rs:5:46 + --> $DIR/nested_impl_trait.rs:6:46 | LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x } | ^^^^^^^^^^^^^^^^^^^^^ the trait `From<impl Into<u32>>` is not implemented for `impl Debug` @@ -56,7 +50,7 @@ LL | fn bad_in_ret_position(x: impl Into<u32>) -> impl Into<impl Debug> { x } = note: required for `impl Into<u32>` to implement `Into<impl Debug>` error[E0277]: the trait bound `impl Debug: From<impl Into<u32>>` is not satisfied - --> $DIR/nested_impl_trait.rs:18:34 + --> $DIR/nested_impl_trait.rs:19:34 | LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x } | ^^^^^^^^^^^^^^^^^^^^^ the trait `From<impl Into<u32>>` is not implemented for `impl Debug` @@ -64,7 +58,7 @@ LL | fn bad(x: impl Into<u32>) -> impl Into<impl Debug> { x } = help: the trait `Into<U>` is implemented for `T` = note: required for `impl Into<u32>` to implement `Into<impl Debug>` -error: aborting due to 8 previous errors +error: aborting due to 7 previous errors Some errors have detailed explanations: E0277, E0562, E0666. For more information about an error, try `rustc --explain E0277`. diff --git a/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle-2.rs b/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle-2.rs index 621c4ea6e..af9dfe25b 100644 --- a/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle-2.rs +++ b/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle-2.rs @@ -5,13 +5,13 @@ type Foo = impl PartialEq<(Foo, i32)>; struct Bar; impl PartialEq<(Foo, i32)> for Bar { -//~^ ERROR cannot implement trait on type alias impl trait fn eq(&self, _other: &(Foo, i32)) -> bool { true } } fn foo() -> Foo { + //~^ ERROR can't compare `Bar` with `(Bar, i32)` Bar } diff --git a/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle-2.stderr b/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle-2.stderr index 2ef1697ba..7b63a3d0b 100644 --- a/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle-2.stderr +++ b/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle-2.stderr @@ -1,14 +1,15 @@ -error: cannot implement trait on type alias impl trait - --> $DIR/recursive-type-alias-impl-trait-declaration-too-subtle-2.rs:7:17 +error[E0277]: can't compare `Bar` with `(Bar, i32)` + --> $DIR/recursive-type-alias-impl-trait-declaration-too-subtle-2.rs:13:13 | -LL | impl PartialEq<(Foo, i32)> for Bar { - | ^^^ +LL | fn foo() -> Foo { + | ^^^ no implementation for `Bar == (Bar, i32)` +LL | +LL | Bar + | --- return type was inferred to be `Bar` here | -note: type alias impl trait defined here - --> $DIR/recursive-type-alias-impl-trait-declaration-too-subtle-2.rs:3:12 - | -LL | type Foo = impl PartialEq<(Foo, i32)>; - | ^^^^^^^^^^^^^^^^^^^^^^^^^^ + = help: the trait `PartialEq<(Bar, i32)>` is not implemented for `Bar` + = help: the trait `PartialEq<(Foo, i32)>` is implemented for `Bar` error: aborting due to previous error +For more information about this error, try `rustc --explain E0277`. diff --git a/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle.rs b/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle.rs index df7966f00..91f1ed481 100644 --- a/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle.rs +++ b/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle.rs @@ -2,11 +2,13 @@ mod a { type Foo = impl PartialEq<(Foo, i32)>; + //~^ ERROR: unconstrained opaque type struct Bar; impl PartialEq<(Bar, i32)> for Bar { fn eq(&self, _other: &(Foo, i32)) -> bool { + //~^ ERROR: `eq` has an incompatible type for trait true } } @@ -14,12 +16,13 @@ mod a { mod b { type Foo = impl PartialEq<(Foo, i32)>; + //~^ ERROR: unconstrained opaque type struct Bar; impl PartialEq<(Foo, i32)> for Bar { - //~^ ERROR cannot implement trait on type alias impl trait fn eq(&self, _other: &(Bar, i32)) -> bool { + //~^ ERROR: `eq` has an incompatible type for trait true } } diff --git a/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle.stderr b/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle.stderr index 6cd63dcf8..3dda5761a 100644 --- a/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle.stderr +++ b/src/test/ui/impl-trait/recursive-type-alias-impl-trait-declaration-too-subtle.stderr @@ -1,14 +1,49 @@ -error: cannot implement trait on type alias impl trait - --> $DIR/recursive-type-alias-impl-trait-declaration-too-subtle.rs:20:21 +error: unconstrained opaque type + --> $DIR/recursive-type-alias-impl-trait-declaration-too-subtle.rs:4:16 | -LL | impl PartialEq<(Foo, i32)> for Bar { - | ^^^ +LL | type Foo = impl PartialEq<(Foo, i32)>; + | ^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: `Foo` must be used in combination with a concrete type within the same module + +error[E0053]: method `eq` has an incompatible type for trait + --> $DIR/recursive-type-alias-impl-trait-declaration-too-subtle.rs:10:30 + | +LL | type Foo = impl PartialEq<(Foo, i32)>; + | -------------------------- the found opaque type +... +LL | fn eq(&self, _other: &(Foo, i32)) -> bool { + | ^^^^^^^^^^^ + | | + | expected struct `a::Bar`, found opaque type + | help: change the parameter type to match the trait: `&(a::Bar, i32)` | -note: type alias impl trait defined here - --> $DIR/recursive-type-alias-impl-trait-declaration-too-subtle.rs:16:16 + = note: expected fn pointer `fn(&a::Bar, &(a::Bar, i32)) -> _` + found fn pointer `fn(&a::Bar, &(a::Foo, i32)) -> _` + +error: unconstrained opaque type + --> $DIR/recursive-type-alias-impl-trait-declaration-too-subtle.rs:18:16 | LL | type Foo = impl PartialEq<(Foo, i32)>; | ^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: `Foo` must be used in combination with a concrete type within the same module + +error[E0053]: method `eq` has an incompatible type for trait + --> $DIR/recursive-type-alias-impl-trait-declaration-too-subtle.rs:24:30 + | +LL | type Foo = impl PartialEq<(Foo, i32)>; + | -------------------------- the expected opaque type +... +LL | fn eq(&self, _other: &(Bar, i32)) -> bool { + | ^^^^^^^^^^^ + | | + | expected opaque type, found struct `b::Bar` + | help: change the parameter type to match the trait: `&(b::Foo, i32)` + | + = note: expected fn pointer `fn(&b::Bar, &(b::Foo, i32)) -> _` + found fn pointer `fn(&b::Bar, &(b::Bar, i32)) -> _` -error: aborting due to previous error +error: aborting due to 4 previous errors +For more information about this error, try `rustc --explain E0053`. diff --git a/src/test/ui/impl-trait/where-allowed.rs b/src/test/ui/impl-trait/where-allowed.rs index c1dd46c7f..ff63b04c2 100644 --- a/src/test/ui/impl-trait/where-allowed.rs +++ b/src/test/ui/impl-trait/where-allowed.rs @@ -1,5 +1,6 @@ //! A simple test for testing many permutations of allowedness of //! impl Trait +#![feature(impl_trait_in_fn_trait_return)] use std::fmt::Debug; // Allowed @@ -39,9 +40,8 @@ fn in_dyn_Fn_return_in_parameters(_: &dyn Fn() -> impl Debug) { panic!() } fn in_dyn_Fn_parameter_in_return() -> &'static dyn Fn(impl Debug) { panic!() } //~^ ERROR `impl Trait` only allowed in function and inherent method return types -// Disallowed +// Allowed fn in_dyn_Fn_return_in_return() -> &'static dyn Fn() -> impl Debug { panic!() } -//~^ ERROR `impl Trait` only allowed in function and inherent method return types // Disallowed fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() } @@ -57,9 +57,8 @@ fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() } //~^ ERROR `impl Trait` only allowed in function and inherent method return types //~| ERROR nested `impl Trait` is not allowed -// Disallowed +// Allowed fn in_impl_Fn_return_in_return() -> &'static impl Fn() -> impl Debug { panic!() } -//~^ ERROR `impl Trait` only allowed in function and inherent method return types // Disallowed fn in_Fn_parameter_in_generics<F: Fn(impl Debug)> (_: F) { panic!() } diff --git a/src/test/ui/impl-trait/where-allowed.stderr b/src/test/ui/impl-trait/where-allowed.stderr index 2e7c7ca40..3ad0a9f9d 100644 --- a/src/test/ui/impl-trait/where-allowed.stderr +++ b/src/test/ui/impl-trait/where-allowed.stderr @@ -17,7 +17,7 @@ LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic | outer `impl Trait` error[E0658]: `impl Trait` in type aliases is unstable - --> $DIR/where-allowed.rs:119:16 + --> $DIR/where-allowed.rs:118:16 | LL | type Out = impl Debug; | ^^^^^^^^^^ @@ -26,7 +26,7 @@ LL | type Out = impl Debug; = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable error[E0658]: `impl Trait` in type aliases is unstable - --> $DIR/where-allowed.rs:154:23 + --> $DIR/where-allowed.rs:153:23 | LL | type InTypeAlias<R> = impl Debug; | ^^^^^^^^^^ @@ -35,7 +35,7 @@ LL | type InTypeAlias<R> = impl Debug; = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable error[E0658]: `impl Trait` in type aliases is unstable - --> $DIR/where-allowed.rs:157:39 + --> $DIR/where-allowed.rs:156:39 | LL | type InReturnInTypeAlias<R> = fn() -> impl Debug; | ^^^^^^^^^^ @@ -44,53 +44,47 @@ LL | type InReturnInTypeAlias<R> = fn() -> impl Debug; = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer param - --> $DIR/where-allowed.rs:15:40 + --> $DIR/where-allowed.rs:16:40 | LL | fn in_fn_parameter_in_parameters(_: fn(impl Debug)) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer return - --> $DIR/where-allowed.rs:19:42 + --> $DIR/where-allowed.rs:20:42 | LL | fn in_fn_return_in_parameters(_: fn() -> impl Debug) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer param - --> $DIR/where-allowed.rs:23:38 + --> $DIR/where-allowed.rs:24:38 | LL | fn in_fn_parameter_in_return() -> fn(impl Debug) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer return - --> $DIR/where-allowed.rs:27:40 + --> $DIR/where-allowed.rs:28:40 | LL | fn in_fn_return_in_return() -> fn() -> impl Debug { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait param - --> $DIR/where-allowed.rs:31:49 + --> $DIR/where-allowed.rs:32:49 | LL | fn in_dyn_Fn_parameter_in_parameters(_: &dyn Fn(impl Debug)) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return - --> $DIR/where-allowed.rs:35:51 + --> $DIR/where-allowed.rs:36:51 | LL | fn in_dyn_Fn_return_in_parameters(_: &dyn Fn() -> impl Debug) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait param - --> $DIR/where-allowed.rs:39:55 + --> $DIR/where-allowed.rs:40:55 | LL | fn in_dyn_Fn_parameter_in_return() -> &'static dyn Fn(impl Debug) { panic!() } | ^^^^^^^^^^ -error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return - --> $DIR/where-allowed.rs:43:57 - | -LL | fn in_dyn_Fn_return_in_return() -> &'static dyn Fn() -> impl Debug { panic!() } - | ^^^^^^^^^^ - error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait param --> $DIR/where-allowed.rs:47:51 | @@ -109,56 +103,50 @@ error[E0562]: `impl Trait` only allowed in function and inherent method return t LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() } | ^^^^^^^^^^ -error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return - --> $DIR/where-allowed.rs:61:59 - | -LL | fn in_impl_Fn_return_in_return() -> &'static impl Fn() -> impl Debug { panic!() } - | ^^^^^^^^^^ - error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait param - --> $DIR/where-allowed.rs:65:38 + --> $DIR/where-allowed.rs:64:38 | LL | fn in_Fn_parameter_in_generics<F: Fn(impl Debug)> (_: F) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return - --> $DIR/where-allowed.rs:69:40 + --> $DIR/where-allowed.rs:68:40 | LL | fn in_Fn_return_in_generics<F: Fn() -> impl Debug> (_: F) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:82:32 + --> $DIR/where-allowed.rs:81:32 | LL | struct InBraceStructField { x: impl Debug } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in path - --> $DIR/where-allowed.rs:86:41 + --> $DIR/where-allowed.rs:85:41 | LL | struct InAdtInBraceStructField { x: Vec<impl Debug> } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:90:27 + --> $DIR/where-allowed.rs:89:27 | LL | struct InTupleStructField(impl Debug); | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:95:25 + --> $DIR/where-allowed.rs:94:25 | LL | InBraceVariant { x: impl Debug }, | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:97:20 + --> $DIR/where-allowed.rs:96:20 | LL | InTupleVariant(impl Debug), | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in trait method return - --> $DIR/where-allowed.rs:108:23 + --> $DIR/where-allowed.rs:107:23 | LL | fn in_return() -> impl Debug; | ^^^^^^^^^^ @@ -167,7 +155,7 @@ LL | fn in_return() -> impl Debug; = help: add `#![feature(return_position_impl_trait_in_trait)]` to the crate attributes to enable error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `impl` method return - --> $DIR/where-allowed.rs:125:34 + --> $DIR/where-allowed.rs:124:34 | LL | fn in_trait_impl_return() -> impl Debug { () } | ^^^^^^^^^^ @@ -176,127 +164,127 @@ LL | fn in_trait_impl_return() -> impl Debug { () } = help: add `#![feature(return_position_impl_trait_in_trait)]` to the crate attributes to enable error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `extern fn` param - --> $DIR/where-allowed.rs:138:33 + --> $DIR/where-allowed.rs:137:33 | LL | fn in_foreign_parameters(_: impl Debug); | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `extern fn` return - --> $DIR/where-allowed.rs:141:31 + --> $DIR/where-allowed.rs:140:31 | LL | fn in_foreign_return() -> impl Debug; | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `fn` pointer return - --> $DIR/where-allowed.rs:157:39 + --> $DIR/where-allowed.rs:156:39 | LL | type InReturnInTypeAlias<R> = fn() -> impl Debug; | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in trait - --> $DIR/where-allowed.rs:162:16 + --> $DIR/where-allowed.rs:161:16 | LL | impl PartialEq<impl Debug> for () { | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:167:24 + --> $DIR/where-allowed.rs:166:24 | LL | impl PartialEq<()> for impl Debug { | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:172:6 + --> $DIR/where-allowed.rs:171:6 | LL | impl impl Debug { | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:178:24 + --> $DIR/where-allowed.rs:177:24 | LL | impl InInherentImplAdt<impl Debug> { | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:184:11 + --> $DIR/where-allowed.rs:183:11 | LL | where impl Debug: Debug | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:191:15 + --> $DIR/where-allowed.rs:190:15 | LL | where Vec<impl Debug>: Debug | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in bound - --> $DIR/where-allowed.rs:198:24 + --> $DIR/where-allowed.rs:197:24 | LL | where T: PartialEq<impl Debug> | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait param - --> $DIR/where-allowed.rs:205:17 + --> $DIR/where-allowed.rs:204:17 | LL | where T: Fn(impl Debug) | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in `Fn` trait return - --> $DIR/where-allowed.rs:212:22 + --> $DIR/where-allowed.rs:211:22 | LL | where T: Fn() -> impl Debug | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:218:40 + --> $DIR/where-allowed.rs:217:40 | LL | struct InStructGenericParamDefault<T = impl Debug>(T); | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:222:36 + --> $DIR/where-allowed.rs:221:36 | LL | enum InEnumGenericParamDefault<T = impl Debug> { Variant(T) } | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:226:38 + --> $DIR/where-allowed.rs:225:38 | LL | trait InTraitGenericParamDefault<T = impl Debug> {} | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:230:41 + --> $DIR/where-allowed.rs:229:41 | LL | type InTypeAliasGenericParamDefault<T = impl Debug> = T; | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:234:11 + --> $DIR/where-allowed.rs:233:11 | LL | impl <T = impl Debug> T {} | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in type - --> $DIR/where-allowed.rs:241:40 + --> $DIR/where-allowed.rs:240:40 | LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {} | ^^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in variable binding - --> $DIR/where-allowed.rs:247:29 + --> $DIR/where-allowed.rs:246:29 | LL | let _in_local_variable: impl Fn() = || {}; | ^^^^^^^^^ error[E0562]: `impl Trait` only allowed in function and inherent method return types, not in closure return - --> $DIR/where-allowed.rs:249:46 + --> $DIR/where-allowed.rs:248:46 | LL | let _in_return_in_local_variable = || -> impl Fn() { || {} }; | ^^^^^^^^^ error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions - --> $DIR/where-allowed.rs:234:7 + --> $DIR/where-allowed.rs:233:7 | LL | impl <T = impl Debug> T {} | ^^^^^^^^^^^^^^ @@ -306,7 +294,7 @@ LL | impl <T = impl Debug> T {} = note: `#[deny(invalid_type_param_default)]` on by default error: defaults for type parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions - --> $DIR/where-allowed.rs:241:36 + --> $DIR/where-allowed.rs:240:36 | LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {} | ^^^^^^^^^^^^^^ @@ -315,14 +303,14 @@ LL | fn in_method_generic_param_default<T = impl Debug>(_: T) {} = note: for more information, see issue #36887 <https://github.com/rust-lang/rust/issues/36887> error[E0118]: no nominal type found for inherent implementation - --> $DIR/where-allowed.rs:234:23 + --> $DIR/where-allowed.rs:233:23 | LL | impl <T = impl Debug> T {} | ^ impl requires a nominal type | = note: either implement a trait on it or create a newtype to wrap it instead -error: aborting due to 49 previous errors +error: aborting due to 47 previous errors Some errors have detailed explanations: E0118, E0562, E0658, E0666. For more information about an error, try `rustc --explain E0118`. |