Auto merge of #71108 - estebank:suggest-proj-type-mismatch-constraint, r=oli-obk
On type mismatch involving associated type, suggest constraint
When an associated type is found when a specific type was expected, if
possible provide a structured suggestion constraining the associated
type in a bound.
```
error[E0271]: type mismatch resolving `<T as Foo>::Y == i32`
--> $DIR/associated-types-multiple-types-one-trait.rs:13:5
|
LL | want_y(t);
| ^^^^^^ expected `i32`, found associated type
...
LL | fn want_y<T:Foo<Y=i32>>(t: &T) { }
| ----- required by this bound in `want_y`
|
= note: expected type `i32`
found associated type `<T as Foo>::Y`
help: consider constraining the associated type `<T as Foo>::Y` to `i32`
|
LL | fn have_x_want_y<T:Foo<X=u32, Y = i32>>(t: &T)
| ^^^^^^^^^
```
```
error[E0308]: mismatched types
--> $DIR/trait-with-missing-associated-type-restriction.rs:12:9
|
LL | qux(x.func())
| ^^^^^^^^ expected `usize`, found associated type
|
= note: expected type `usize`
found associated type `<impl Trait as Trait>::A`
help: consider constraining the associated type `<impl Trait as Trait>::A` to `usize`
|
LL | fn foo(x: impl Trait<A = usize>) {
| ^^^^^^^^^^
```
Fix #71035. Related to #70908.
This commit is contained in:
bors
commit
d6823ba166
35 changed files with 859 additions and 136 deletions
|
|
@ -9,8 +9,6 @@ LL | const FROM: &'static str = "foo";
|
|||
|
|
||||
= note: expected associated type `<T as Foo>::Out`
|
||||
found reference `&'static str`
|
||||
= note: consider constraining the associated type `<T as Foo>::Out` to `&'static str` or calling a method that returns `<T as Foo>::Out`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error: aborting due to previous error
|
||||
|
||||
|
|
|
|||
|
|
@ -8,8 +8,10 @@ LL | let _: Bar = x.boo();
|
|||
|
|
||||
= note: expected struct `Bar`
|
||||
found associated type `<I as Foo>::A`
|
||||
= note: consider constraining the associated type `<I as Foo>::A` to `Bar`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
help: consider constraining the associated type `<I as Foo>::A` to `Bar`
|
||||
|
|
||||
LL | fn foo2<I: Foo<A = Bar>>(x: I) {
|
||||
| ^^^^^^^^^
|
||||
|
||||
error[E0271]: type mismatch resolving `<isize as Foo>::A == Bar`
|
||||
--> $DIR/associated-types-eq-3.rs:38:5
|
||||
|
|
|
|||
|
|
@ -12,8 +12,6 @@ LL | is_iterator_of::<Option<T>, _>(&adapter);
|
|||
|
|
||||
= note: expected enum `std::option::Option<T>`
|
||||
found type `T`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error: aborting due to previous error
|
||||
|
||||
|
|
|
|||
|
|
@ -9,8 +9,10 @@ LL | fn want_y<T:Foo<Y=i32>>(t: &T) { }
|
|||
|
|
||||
= note: expected type `i32`
|
||||
found associated type `<T as Foo>::Y`
|
||||
= note: consider constraining the associated type `<T as Foo>::Y` to `i32`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
help: consider constraining the associated type `<T as Foo>::Y` to `i32`
|
||||
|
|
||||
LL | fn have_x_want_y<T:Foo<X=u32, Y = i32>>(t: &T)
|
||||
| ^^^^^^^^^
|
||||
|
||||
error[E0271]: type mismatch resolving `<T as Foo>::X == u32`
|
||||
--> $DIR/associated-types-multiple-types-one-trait.rs:18:5
|
||||
|
|
@ -23,8 +25,10 @@ LL | fn want_x<T:Foo<X=u32>>(t: &T) { }
|
|||
|
|
||||
= note: expected type `u32`
|
||||
found associated type `<T as Foo>::X`
|
||||
= note: consider constraining the associated type `<T as Foo>::X` to `u32`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
help: consider constraining the associated type `<T as Foo>::X` to `u32`
|
||||
|
|
||||
LL | fn have_y_want_x<T:Foo<Y=i32, X = u32>>(t: &T)
|
||||
| ^^^^^^^^^
|
||||
|
||||
error: aborting due to 2 previous errors
|
||||
|
||||
|
|
|
|||
|
|
@ -3,15 +3,13 @@
|
|||
// Associated type defaults may not be assumed inside the trait defining them.
|
||||
// ie. they only resolve to `<Self as Tr>::A`, not the actual type `()`
|
||||
trait Tr {
|
||||
type A = ();
|
||||
type A = (); //~ NOTE associated type defaults can't be assumed inside the trait defining them
|
||||
|
||||
fn f(p: Self::A) {
|
||||
let () = p;
|
||||
//~^ ERROR mismatched types
|
||||
//~| NOTE expected associated type, found `()`
|
||||
//~| NOTE expected associated type `<Self as Tr>::A`
|
||||
//~| NOTE consider constraining the associated type
|
||||
//~| NOTE for more information, visit
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -31,15 +29,13 @@ impl Tr for u8 {
|
|||
}
|
||||
|
||||
trait AssocConst {
|
||||
type Ty = u8;
|
||||
type Ty = u8; //~ NOTE associated type defaults can't be assumed inside the trait defining them
|
||||
|
||||
// Assoc. consts also cannot assume that default types hold
|
||||
const C: Self::Ty = 0u8;
|
||||
//~^ ERROR mismatched types
|
||||
//~| NOTE expected associated type, found `u8`
|
||||
//~| NOTE expected associated type `<Self as AssocConst>::Ty`
|
||||
//~| NOTE consider constraining the associated type
|
||||
//~| NOTE for more information, visit
|
||||
}
|
||||
|
||||
// An impl can, however
|
||||
|
|
|
|||
|
|
@ -1,24 +1,26 @@
|
|||
error[E0308]: mismatched types
|
||||
--> $DIR/defaults-in-other-trait-items.rs:9:13
|
||||
|
|
||||
LL | type A = ();
|
||||
| ------------ associated type defaults can't be assumed inside the trait defining them
|
||||
...
|
||||
LL | let () = p;
|
||||
| ^^ expected associated type, found `()`
|
||||
|
|
||||
= note: expected associated type `<Self as Tr>::A`
|
||||
found unit type `()`
|
||||
= note: consider constraining the associated type `<Self as Tr>::A` to `()` or calling a method that returns `<Self as Tr>::A`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/defaults-in-other-trait-items.rs:37:25
|
||||
--> $DIR/defaults-in-other-trait-items.rs:35:25
|
||||
|
|
||||
LL | type Ty = u8;
|
||||
| ------------- associated type defaults can't be assumed inside the trait defining them
|
||||
...
|
||||
LL | const C: Self::Ty = 0u8;
|
||||
| ^^^ expected associated type, found `u8`
|
||||
|
|
||||
= note: expected associated type `<Self as AssocConst>::Ty`
|
||||
found type `u8`
|
||||
= note: consider constraining the associated type `<Self as AssocConst>::Ty` to `u8` or calling a method that returns `<Self as AssocConst>::Ty`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error: aborting due to 2 previous errors
|
||||
|
||||
|
|
|
|||
|
|
@ -9,8 +9,6 @@ LL | fn make() -> u8 { 0 }
|
|||
|
|
||||
= note: expected fn pointer `fn() -> <A<T> as Tr>::Ty`
|
||||
found fn pointer `fn() -> u8`
|
||||
= note: consider constraining the associated type `<A<T> as Tr>::Ty` to `u8` or calling a method that returns `<A<T> as Tr>::Ty`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0053]: method `make` has an incompatible type for trait
|
||||
--> $DIR/defaults-specialization.rs:34:18
|
||||
|
|
@ -18,17 +16,21 @@ error[E0053]: method `make` has an incompatible type for trait
|
|||
LL | fn make() -> Self::Ty {
|
||||
| -------- type in trait
|
||||
...
|
||||
LL | default type Ty = bool;
|
||||
| ----------------------- expected this associated type
|
||||
LL |
|
||||
LL | fn make() -> bool { true }
|
||||
| ^^^^ expected associated type, found `bool`
|
||||
|
|
||||
= note: expected fn pointer `fn() -> <B<T> as Tr>::Ty`
|
||||
found fn pointer `fn() -> bool`
|
||||
= note: consider constraining the associated type `<B<T> as Tr>::Ty` to `bool` or calling a method that returns `<B<T> as Tr>::Ty`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/defaults-specialization.rs:9:9
|
||||
|
|
||||
LL | type Ty = u8;
|
||||
| ------------- associated type defaults can't be assumed inside the trait defining them
|
||||
LL |
|
||||
LL | fn make() -> Self::Ty {
|
||||
| -------- expected `<Self as Tr>::Ty` because of return type
|
||||
LL | 0u8
|
||||
|
|
@ -36,8 +38,6 @@ LL | 0u8
|
|||
|
|
||||
= note: expected associated type `<Self as Tr>::Ty`
|
||||
found type `u8`
|
||||
= note: consider constraining the associated type `<Self as Tr>::Ty` to `u8` or calling a method that returns `<Self as Tr>::Ty`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/defaults-specialization.rs:25:29
|
||||
|
|
@ -49,12 +49,15 @@ LL | fn make() -> Self::Ty { 0u8 }
|
|||
|
|
||||
= note: expected associated type `<A2<T> as Tr>::Ty`
|
||||
found type `u8`
|
||||
= note: consider constraining the associated type `<A2<T> as Tr>::Ty` to `u8` or calling a method that returns `<A2<T> as Tr>::Ty`
|
||||
= help: consider constraining the associated type `<A2<T> as Tr>::Ty` to `u8` or calling a method that returns `<A2<T> as Tr>::Ty`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/defaults-specialization.rs:43:29
|
||||
|
|
||||
LL | default type Ty = bool;
|
||||
| ----------------------- expected this associated type
|
||||
LL |
|
||||
LL | fn make() -> Self::Ty { true }
|
||||
| -------- ^^^^ expected associated type, found `bool`
|
||||
| |
|
||||
|
|
@ -62,8 +65,6 @@ LL | fn make() -> Self::Ty { true }
|
|||
|
|
||||
= note: expected associated type `<B2<T> as Tr>::Ty`
|
||||
found type `bool`
|
||||
= note: consider constraining the associated type `<B2<T> as Tr>::Ty` to `bool` or calling a method that returns `<B2<T> as Tr>::Ty`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/defaults-specialization.rs:86:32
|
||||
|
|
@ -75,8 +76,11 @@ LL | let _: <B<()> as Tr>::Ty = 0u8;
|
|||
|
|
||||
= note: expected associated type `<B<()> as Tr>::Ty`
|
||||
found type `u8`
|
||||
= note: consider constraining the associated type `<B<()> as Tr>::Ty` to `u8` or calling a method that returns `<B<()> as Tr>::Ty`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
help: a method is available that returns `<B<()> as Tr>::Ty`
|
||||
--> $DIR/defaults-specialization.rs:8:5
|
||||
|
|
||||
LL | fn make() -> Self::Ty {
|
||||
| ^^^^^^^^^^^^^^^^^^^^^ consider calling `Tr::make`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/defaults-specialization.rs:87:32
|
||||
|
|
@ -88,8 +92,11 @@ LL | let _: <B<()> as Tr>::Ty = true;
|
|||
|
|
||||
= note: expected associated type `<B<()> as Tr>::Ty`
|
||||
found type `bool`
|
||||
= note: consider constraining the associated type `<B<()> as Tr>::Ty` to `bool` or calling a method that returns `<B<()> as Tr>::Ty`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
help: a method is available that returns `<B<()> as Tr>::Ty`
|
||||
--> $DIR/defaults-specialization.rs:8:5
|
||||
|
|
||||
LL | fn make() -> Self::Ty {
|
||||
| ^^^^^^^^^^^^^^^^^^^^^ consider calling `Tr::make`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/defaults-specialization.rs:88:33
|
||||
|
|
@ -101,8 +108,11 @@ LL | let _: <B2<()> as Tr>::Ty = 0u8;
|
|||
|
|
||||
= note: expected associated type `<B2<()> as Tr>::Ty`
|
||||
found type `u8`
|
||||
= note: consider constraining the associated type `<B2<()> as Tr>::Ty` to `u8` or calling a method that returns `<B2<()> as Tr>::Ty`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
help: a method is available that returns `<B2<()> as Tr>::Ty`
|
||||
--> $DIR/defaults-specialization.rs:8:5
|
||||
|
|
||||
LL | fn make() -> Self::Ty {
|
||||
| ^^^^^^^^^^^^^^^^^^^^^ consider calling `Tr::make`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/defaults-specialization.rs:89:33
|
||||
|
|
@ -114,8 +124,11 @@ LL | let _: <B2<()> as Tr>::Ty = true;
|
|||
|
|
||||
= note: expected associated type `<B2<()> as Tr>::Ty`
|
||||
found type `bool`
|
||||
= note: consider constraining the associated type `<B2<()> as Tr>::Ty` to `bool` or calling a method that returns `<B2<()> as Tr>::Ty`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
help: a method is available that returns `<B2<()> as Tr>::Ty`
|
||||
--> $DIR/defaults-specialization.rs:8:5
|
||||
|
|
||||
LL | fn make() -> Self::Ty {
|
||||
| ^^^^^^^^^^^^^^^^^^^^^ consider calling `Tr::make`
|
||||
|
||||
error: aborting due to 9 previous errors
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,32 @@
|
|||
trait Foo {
|
||||
type Item;
|
||||
}
|
||||
|
||||
trait Bar: Foo {}
|
||||
|
||||
struct S;
|
||||
|
||||
impl Foo for S {
|
||||
type Item = i32;
|
||||
}
|
||||
impl Bar for S {}
|
||||
|
||||
struct T;
|
||||
|
||||
impl Foo for T {
|
||||
type Item = u32;
|
||||
}
|
||||
impl Bar for T {}
|
||||
|
||||
fn bar() -> impl Bar {
|
||||
T
|
||||
}
|
||||
|
||||
fn baz() -> impl Bar<Item = i32> {
|
||||
//~^ ERROR type mismatch resolving `<impl Bar as Foo>::Item == i32`
|
||||
bar()
|
||||
}
|
||||
|
||||
fn main() {
|
||||
let _ = baz();
|
||||
}
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
error[E0271]: type mismatch resolving `<impl Bar as Foo>::Item == i32`
|
||||
--> $DIR/impl-trait-return-missing-constraint.rs:25:13
|
||||
|
|
||||
LL | fn bar() -> impl Bar {
|
||||
| -------- the expected opaque type
|
||||
...
|
||||
LL | fn baz() -> impl Bar<Item = i32> {
|
||||
| ^^^^^^^^^^^^^^^^^^^^ expected associated type, found `i32`
|
||||
|
|
||||
= note: expected associated type `<impl Bar as Foo>::Item`
|
||||
found type `i32`
|
||||
= note: the return type of a function must have a statically known size
|
||||
help: consider constraining the associated type `<impl Bar as Foo>::Item` to `i32`
|
||||
|
|
||||
LL | fn bar() -> impl Bar<Item = i32> {
|
||||
| ^^^^^^^^^^^^
|
||||
|
||||
error: aborting due to previous error
|
||||
|
||||
For more information about this error, try `rustc --explain E0271`.
|
||||
|
|
@ -6,7 +6,7 @@ LL | const C: <Self::Fv as Foo>::Bar = 6665;
|
|||
|
|
||||
= note: expected associated type `<<Self as Baz>::Fv as Foo>::Bar`
|
||||
found type `{integer}`
|
||||
= note: consider constraining the associated type `<<Self as Baz>::Fv as Foo>::Bar` to `{integer}` or calling a method that returns `<<Self as Baz>::Fv as Foo>::Bar`
|
||||
= help: consider constraining the associated type `<<Self as Baz>::Fv as Foo>::Bar` to `{integer}`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error: aborting due to previous error
|
||||
|
|
|
|||
|
|
@ -6,7 +6,7 @@ LL | type Item<'a> where T: 'a = <std::slice::Iter<'a, T> as Iterator>::Item
|
|||
|
|
||||
= note: expected reference `&T`
|
||||
found associated type `<std::vec::Vec<T> as Iterable>::Item<'_>`
|
||||
= note: consider constraining the associated type `<std::vec::Vec<T> as Iterable>::Item<'_>` to `&_`
|
||||
= help: consider constraining the associated type `<std::vec::Vec<T> as Iterable>::Item<'_>` to `&_`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0271]: type mismatch resolving `for<'a> <<[T] as Iterable>::Iter<'a> as std::iter::Iterator>::Item == <[T] as Iterable>::Item<'a>`
|
||||
|
|
@ -17,7 +17,7 @@ LL | type Item<'a> where T: 'a = <std::slice::Iter<'a, T> as Iterator>::Item
|
|||
|
|
||||
= note: expected reference `&T`
|
||||
found associated type `<[T] as Iterable>::Item<'_>`
|
||||
= note: consider constraining the associated type `<[T] as Iterable>::Item<'_>` to `&_`
|
||||
= help: consider constraining the associated type `<[T] as Iterable>::Item<'_>` to `&_`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0271]: type mismatch resolving `for<'a> <<std::vec::Vec<T> as Iterable>::Iter<'a> as std::iter::Iterator>::Item == <std::vec::Vec<T> as Iterable>::Item<'a>`
|
||||
|
|
@ -34,7 +34,7 @@ LL | fn iter<'a>(&'a self) -> Self::Iter<'a> {
|
|||
|
|
||||
= note: expected associated type `<std::vec::Vec<T> as Iterable>::Item<'_>`
|
||||
found reference `&T`
|
||||
= note: consider constraining the associated type `<std::vec::Vec<T> as Iterable>::Item<'_>` to `&_` or calling a method that returns `<std::vec::Vec<T> as Iterable>::Item<'_>`
|
||||
= help: consider constraining the associated type `<std::vec::Vec<T> as Iterable>::Item<'_>` to `&_` or calling a method that returns `<std::vec::Vec<T> as Iterable>::Item<'_>`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0271]: type mismatch resolving `for<'a> <<[T] as Iterable>::Iter<'a> as std::iter::Iterator>::Item == <[T] as Iterable>::Item<'a>`
|
||||
|
|
@ -51,7 +51,7 @@ LL | fn iter<'a>(&'a self) -> Self::Iter<'a> {
|
|||
|
|
||||
= note: expected associated type `<[T] as Iterable>::Item<'_>`
|
||||
found reference `&T`
|
||||
= note: consider constraining the associated type `<[T] as Iterable>::Item<'_>` to `&_` or calling a method that returns `<[T] as Iterable>::Item<'_>`
|
||||
= help: consider constraining the associated type `<[T] as Iterable>::Item<'_>` to `&_` or calling a method that returns `<[T] as Iterable>::Item<'_>`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error: aborting due to 4 previous errors
|
||||
|
|
|
|||
|
|
@ -6,7 +6,7 @@ LL | let v = Unit2.m(
|
|||
|
|
||||
= note: expected struct `Unit4`
|
||||
found associated type `<_ as Ty<'_>>::V`
|
||||
= note: consider constraining the associated type `<_ as Ty<'_>>::V` to `Unit4`
|
||||
= help: consider constraining the associated type `<_ as Ty<'_>>::V` to `Unit4`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0271]: type mismatch resolving `<[closure@$DIR/issue-62203-hrtb-ice.rs:42:17: 42:39] as std::ops::FnOnce<((&u8,),)>>::Output == Unit3`
|
||||
|
|
|
|||
|
|
@ -14,9 +14,11 @@ LL | fn foo_fail<T: Trait>() -> impl FooLike<Output=T::Assoc> {
|
|||
|
|
||||
= note: expected type `()`
|
||||
found associated type `<T as impl_trait::Trait>::Assoc`
|
||||
= note: consider constraining the associated type `<T as impl_trait::Trait>::Assoc` to `()`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
= note: the return type of a function must have a statically known size
|
||||
help: consider constraining the associated type `<T as impl_trait::Trait>::Assoc` to `()`
|
||||
|
|
||||
LL | fn foo_fail<T: Trait<Assoc = ()>>() -> impl FooLike<Output=T::Assoc> {
|
||||
| ^^^^^^^^^^^^
|
||||
|
||||
error: `impl Trait` return type cannot contain a projection or `Self` that references lifetimes from a parent scope
|
||||
--> $DIR/bound-normalization-fail.rs:43:41
|
||||
|
|
@ -32,9 +34,11 @@ LL | fn foo2_fail<'a, T: Trait<'a>>() -> impl FooLike<Output=T::Assoc> {
|
|||
|
|
||||
= note: expected type `()`
|
||||
found associated type `<T as lifetimes::Trait<'static>>::Assoc`
|
||||
= note: consider constraining the associated type `<T as lifetimes::Trait<'static>>::Assoc` to `()`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
= note: the return type of a function must have a statically known size
|
||||
help: consider constraining the associated type `<T as lifetimes::Trait<'static>>::Assoc` to `()`
|
||||
|
|
||||
LL | fn foo2_fail<'a, T: Trait<'a, Assoc = ()>>() -> impl FooLike<Output=T::Assoc> {
|
||||
| ^^^^^^^^^^^^
|
||||
|
||||
error: aborting due to 3 previous errors; 1 warning emitted
|
||||
|
||||
|
|
|
|||
|
|
@ -25,7 +25,7 @@ LL | let _: i32 = Leak::leak(hide(0_i32));
|
|||
|
|
||||
= note: expected type `i32`
|
||||
found associated type `<impl Foo as Leak>::T`
|
||||
= note: consider constraining the associated type `<impl Foo as Leak>::T` to `i32`
|
||||
= help: consider constraining the associated type `<impl Foo as Leak>::T` to `i32`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0308]: mismatched types
|
||||
|
|
|
|||
|
|
@ -10,8 +10,6 @@ LL | x
|
|||
|
|
||||
= note: expected struct `std::string::String`
|
||||
found type parameter `impl Debug`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error: aborting due to previous error
|
||||
|
||||
|
|
|
|||
|
|
@ -9,8 +9,6 @@ LL | self.iter()
|
|||
|
|
||||
= note: expected type parameter `I`
|
||||
found struct `std::slice::Iter<'_, N>`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0599]: no method named `iter` found for reference `&G` in the current scope
|
||||
--> $DIR/issue-13853.rs:27:23
|
||||
|
|
|
|||
|
|
@ -8,8 +8,6 @@ LL | extern "rust-call" fn call(&self, (_,): (T,)) {}
|
|||
|
|
||||
= note: expected fn pointer `extern "rust-call" fn(&Foo, (&'a T,))`
|
||||
found fn pointer `extern "rust-call" fn(&Foo, (T,))`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0053]: method `call_mut` has an incompatible type for trait
|
||||
--> $DIR/issue-20225.rs:11:3
|
||||
|
|
@ -21,8 +19,6 @@ LL | extern "rust-call" fn call_mut(&mut self, (_,): (T,)) {}
|
|||
|
|
||||
= note: expected fn pointer `extern "rust-call" fn(&mut Foo, (&'a T,))`
|
||||
found fn pointer `extern "rust-call" fn(&mut Foo, (T,))`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0053]: method `call_once` has an incompatible type for trait
|
||||
--> $DIR/issue-20225.rs:18:3
|
||||
|
|
@ -35,8 +31,6 @@ LL | extern "rust-call" fn call_once(self, (_,): (T,)) {}
|
|||
|
|
||||
= note: expected fn pointer `extern "rust-call" fn(Foo, (&'a T,))`
|
||||
found fn pointer `extern "rust-call" fn(Foo, (T,))`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error: aborting due to 3 previous errors
|
||||
|
||||
|
|
|
|||
|
|
@ -8,8 +8,10 @@ LL | pub fn f<'a, T: Tr<'a>>() -> <T as Tr<'a>>::Out {}
|
|||
|
|
||||
= note: expected associated type `<T as Tr<'a>>::Out`
|
||||
found unit type `()`
|
||||
= note: consider constraining the associated type `<T as Tr<'a>>::Out` to `()` or calling a method that returns `<T as Tr<'a>>::Out`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
help: consider constraining the associated type `<T as Tr<'a>>::Out` to `()`
|
||||
|
|
||||
LL | pub fn f<'a, T: Tr<'a, Out = ()>>() -> <T as Tr<'a>>::Out {}
|
||||
| ^^^^^^^^^^
|
||||
|
||||
error: aborting due to previous error
|
||||
|
||||
|
|
|
|||
|
|
@ -8,8 +8,6 @@ LL | const C: S0<u8> = Self(0);
|
|||
|
|
||||
= note: expected type parameter `T`
|
||||
found type `{integer}`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/issue-69306.rs:5:23
|
||||
|
|
@ -21,8 +19,6 @@ LL | const C: S0<u8> = Self(0);
|
|||
|
|
||||
= note: expected struct `S0<u8>`
|
||||
found struct `S0<T>`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/issue-69306.rs:10:14
|
||||
|
|
@ -35,8 +31,6 @@ LL | Self(0);
|
|||
|
|
||||
= note: expected type parameter `T`
|
||||
found type `{integer}`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/issue-69306.rs:27:14
|
||||
|
|
@ -49,8 +43,6 @@ LL | Self(0);
|
|||
|
|
||||
= note: expected type parameter `T`
|
||||
found type `{integer}`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/issue-69306.rs:33:32
|
||||
|
|
@ -62,8 +54,6 @@ LL | const C: S1<u8, u8> = Self(0, 1);
|
|||
|
|
||||
= note: expected type parameter `T`
|
||||
found type `{integer}`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/issue-69306.rs:33:27
|
||||
|
|
@ -75,8 +65,6 @@ LL | const C: S1<u8, u8> = Self(0, 1);
|
|||
|
|
||||
= note: expected struct `S1<u8, _>`
|
||||
found struct `S1<T, _>`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/issue-69306.rs:41:14
|
||||
|
|
|
|||
|
|
@ -9,8 +9,6 @@ LL | Some(true)
|
|||
|
|
||||
= note: expected type parameter `bool` (type parameter `bool`)
|
||||
found type `bool` (`bool`)
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error: aborting due to previous error
|
||||
|
||||
|
|
|
|||
|
|
@ -9,7 +9,7 @@ LL | ()
|
|||
|
|
||||
= note: expected associated type `<T as Foo>::Assoc`
|
||||
found unit type `()`
|
||||
= note: consider constraining the associated type `<T as Foo>::Assoc` to `()` or calling a method that returns `<T as Foo>::Assoc`
|
||||
= help: consider constraining the associated type `<T as Foo>::Assoc` to `()` or calling a method that returns `<T as Foo>::Assoc`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0308]: mismatched types
|
||||
|
|
@ -25,7 +25,7 @@ LL | generic::<()>()
|
|||
|
|
||||
= note: expected unit type `()`
|
||||
found associated type `<() as Foo>::Assoc`
|
||||
= note: consider constraining the associated type `<() as Foo>::Assoc` to `()`
|
||||
= help: consider constraining the associated type `<() as Foo>::Assoc` to `()`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error: aborting due to 2 previous errors
|
||||
|
|
|
|||
|
|
@ -1,6 +1,8 @@
|
|||
error[E0308]: mismatched types
|
||||
--> $DIR/specialization-default-types.rs:15:9
|
||||
|
|
||||
LL | default type Output = Box<T>;
|
||||
| ----------------------------- expected this associated type
|
||||
LL | default fn generate(self) -> Self::Output {
|
||||
| ------------ expected `<T as Example>::Output` because of return type
|
||||
LL | Box::new(self)
|
||||
|
|
@ -8,8 +10,6 @@ LL | Box::new(self)
|
|||
|
|
||||
= note: expected associated type `<T as Example>::Output`
|
||||
found struct `std::boxed::Box<T>`
|
||||
= note: consider constraining the associated type `<T as Example>::Output` to `std::boxed::Box<T>` or calling a method that returns `<T as Example>::Output`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/specialization-default-types.rs:25:5
|
||||
|
|
@ -21,7 +21,7 @@ LL | Example::generate(t)
|
|||
|
|
||||
= note: expected struct `std::boxed::Box<T>`
|
||||
found associated type `<T as Example>::Output`
|
||||
= note: consider constraining the associated type `<T as Example>::Output` to `std::boxed::Box<T>`
|
||||
= help: consider constraining the associated type `<T as Example>::Output` to `std::boxed::Box<T>`
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch19-03-advanced-traits.html
|
||||
|
||||
error: aborting due to 2 previous errors
|
||||
|
|
|
|||
|
|
@ -12,8 +12,6 @@ LL | x
|
|||
|
|
||||
= note: expected struct `std::pin::Pin<std::boxed::Box<(dyn std::future::Future<Output = i32> + std::marker::Send + 'static)>>`
|
||||
found type parameter `F`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/expected-boxed-future-isnt-pinned.rs:18:5
|
||||
|
|
@ -40,8 +38,6 @@ LL | Pin::new(x)
|
|||
|
|
||||
= note: expected struct `std::boxed::Box<dyn std::future::Future<Output = i32> + std::marker::Send>`
|
||||
found type parameter `F`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
= note: for more on the distinction between the stack and the heap, read https://doc.rust-lang.org/book/ch15-01-box.html, https://doc.rust-lang.org/rust-by-example/std/box.html, and https://doc.rust-lang.org/std/boxed/index.html
|
||||
|
||||
error[E0277]: `dyn std::future::Future<Output = i32> + std::marker::Send` cannot be unpinned
|
||||
|
|
|
|||
|
|
@ -0,0 +1,43 @@
|
|||
// run-rustfix
|
||||
#![allow(unused)] // for the fixed file
|
||||
|
||||
trait Trait<T = Self> {
|
||||
type A;
|
||||
|
||||
fn func(&self) -> Self::A;
|
||||
}
|
||||
|
||||
struct S<T>(T);
|
||||
impl<K> S<K> {
|
||||
fn foo<'a, T: Trait + 'a>(&self, _: impl Trait, x: impl Trait<A = usize>, _: T) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn ban<T>(x: T) where T: Trait<A = usize> {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
}
|
||||
|
||||
fn foo<'a, T: Trait + 'a>(_: impl Trait, x: impl Trait<A = usize>, _: T) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn bar<T: Trait<A = usize>>(x: T) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn foo2(x: impl Trait<i32, A = usize>) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn bar2<T: Trait<i32, A = usize>>(x: T) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn ban<T>(x: T) where T: Trait<A = usize> {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn qux(_: usize) {}
|
||||
|
||||
fn main() {}
|
||||
|
|
@ -0,0 +1,43 @@
|
|||
// run-rustfix
|
||||
#![allow(unused)] // for the fixed file
|
||||
|
||||
trait Trait<T = Self> {
|
||||
type A;
|
||||
|
||||
fn func(&self) -> Self::A;
|
||||
}
|
||||
|
||||
struct S<T>(T);
|
||||
impl<K> S<K> {
|
||||
fn foo<'a, T: Trait + 'a>(&self, _: impl Trait, x: impl Trait, _: T) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn ban<T>(x: T) where T: Trait {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
}
|
||||
|
||||
fn foo<'a, T: Trait + 'a>(_: impl Trait, x: impl Trait, _: T) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn bar<T: Trait>(x: T) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn foo2(x: impl Trait<i32>) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn bar2<T: Trait<i32>>(x: T) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn ban<T>(x: T) where T: Trait {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn qux(_: usize) {}
|
||||
|
||||
fn main() {}
|
||||
|
|
@ -0,0 +1,94 @@
|
|||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction-fixable.rs:13:13
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<impl Trait as Trait>::A`
|
||||
help: consider constraining the associated type `<impl Trait as Trait>::A` to `usize`
|
||||
|
|
||||
LL | fn foo<'a, T: Trait + 'a>(&self, _: impl Trait, x: impl Trait<A = usize>, _: T) {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction-fixable.rs:17:13
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<T as Trait>::A`
|
||||
help: consider constraining the associated type `<T as Trait>::A` to `usize`
|
||||
|
|
||||
LL | fn ban<T>(x: T) where T: Trait<A = usize> {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction-fixable.rs:22:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<impl Trait as Trait>::A`
|
||||
help: consider constraining the associated type `<impl Trait as Trait>::A` to `usize`
|
||||
|
|
||||
LL | fn foo<'a, T: Trait + 'a>(_: impl Trait, x: impl Trait<A = usize>, _: T) {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction-fixable.rs:26:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<T as Trait>::A`
|
||||
help: consider constraining the associated type `<T as Trait>::A` to `usize`
|
||||
|
|
||||
LL | fn bar<T: Trait<A = usize>>(x: T) {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction-fixable.rs:30:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<impl Trait<i32> as Trait<i32>>::A`
|
||||
help: consider constraining the associated type `<impl Trait<i32> as Trait<i32>>::A` to `usize`
|
||||
|
|
||||
LL | fn foo2(x: impl Trait<i32, A = usize>) {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction-fixable.rs:34:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<T as Trait<i32>>::A`
|
||||
help: consider constraining the associated type `<T as Trait<i32>>::A` to `usize`
|
||||
|
|
||||
LL | fn bar2<T: Trait<i32, A = usize>>(x: T) {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction-fixable.rs:38:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<T as Trait>::A`
|
||||
help: consider constraining the associated type `<T as Trait>::A` to `usize`
|
||||
|
|
||||
LL | fn ban<T>(x: T) where T: Trait<A = usize> {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error: aborting due to 7 previous errors
|
||||
|
||||
For more information about this error, try `rustc --explain E0308`.
|
||||
|
|
@ -0,0 +1,43 @@
|
|||
// These are all the possible variations of this error I could think of for.
|
||||
// `trait-with-missing-associated-type-restriction-fixable.rs` contains the subset of these that
|
||||
// can be fixed with `rustfix`.
|
||||
|
||||
trait Trait<T = Self> {
|
||||
type A;
|
||||
|
||||
fn func(&self) -> Self::A;
|
||||
fn funk(&self, _: Self::A);
|
||||
}
|
||||
|
||||
fn foo(_: impl Trait, x: impl Trait) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn bar<T: Trait>(x: T) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn foo2(x: impl Trait<i32>) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn bar2<T: Trait<i32>>(x: T) {
|
||||
x.funk(3); //~ ERROR mismatched types
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn baz<D: std::fmt::Debug, T: Trait<A = D>>(x: T) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn bat(x: &mut dyn Trait<(), A = ()>) {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn ban<T>(x: T) where T: Trait {
|
||||
qux(x.func()) //~ ERROR mismatched types
|
||||
}
|
||||
|
||||
fn qux(_: usize) {}
|
||||
|
||||
fn main() {}
|
||||
|
|
@ -0,0 +1,103 @@
|
|||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction.rs:13:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<impl Trait as Trait>::A`
|
||||
help: consider constraining the associated type `<impl Trait as Trait>::A` to `usize`
|
||||
|
|
||||
LL | fn foo(_: impl Trait, x: impl Trait<A = usize>) {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction.rs:17:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<T as Trait>::A`
|
||||
help: consider constraining the associated type `<T as Trait>::A` to `usize`
|
||||
|
|
||||
LL | fn bar<T: Trait<A = usize>>(x: T) {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction.rs:21:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<impl Trait<i32> as Trait<i32>>::A`
|
||||
help: consider constraining the associated type `<impl Trait<i32> as Trait<i32>>::A` to `usize`
|
||||
|
|
||||
LL | fn foo2(x: impl Trait<i32, A = usize>) {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction.rs:25:12
|
||||
|
|
||||
LL | x.funk(3);
|
||||
| ^ expected associated type, found integer
|
||||
|
|
||||
= note: expected associated type `<T as Trait<i32>>::A`
|
||||
found type `{integer}`
|
||||
help: a method is available that returns `<T as Trait<i32>>::A`
|
||||
--> $DIR/trait-with-missing-associated-type-restriction.rs:8:5
|
||||
|
|
||||
LL | fn func(&self) -> Self::A;
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ consider calling `Trait::func`
|
||||
help: consider constraining the associated type `<T as Trait<i32>>::A` to `{integer}`
|
||||
|
|
||||
LL | fn bar2<T: Trait<i32, A = {integer}>>(x: T) {
|
||||
| ^^^^^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction.rs:26:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<T as Trait<i32>>::A`
|
||||
help: consider constraining the associated type `<T as Trait<i32>>::A` to `usize`
|
||||
|
|
||||
LL | fn bar2<T: Trait<i32, A = usize>>(x: T) {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction.rs:30:9
|
||||
|
|
||||
LL | fn baz<D: std::fmt::Debug, T: Trait<A = D>>(x: T) {
|
||||
| - this type parameter
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found type parameter `D`
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found type parameter `D`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction.rs:34:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found `()`
|
||||
|
||||
error[E0308]: mismatched types
|
||||
--> $DIR/trait-with-missing-associated-type-restriction.rs:38:9
|
||||
|
|
||||
LL | qux(x.func())
|
||||
| ^^^^^^^^ expected `usize`, found associated type
|
||||
|
|
||||
= note: expected type `usize`
|
||||
found associated type `<T as Trait>::A`
|
||||
help: consider constraining the associated type `<T as Trait>::A` to `usize`
|
||||
|
|
||||
LL | fn ban<T>(x: T) where T: Trait<A = usize> {
|
||||
| ^^^^^^^^^^^
|
||||
|
||||
error: aborting due to 8 previous errors
|
||||
|
||||
For more information about this error, try `rustc --explain E0308`.
|
||||
|
|
@ -9,8 +9,6 @@ LL | Self::TSVariant(());
|
|||
|
|
||||
= note: expected type parameter `T`
|
||||
found unit type `()`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0109]: type arguments are not allowed for this type
|
||||
--> $DIR/enum-variant-generic-args.rs:15:27
|
||||
|
|
@ -35,8 +33,6 @@ LL | Self::<()>::TSVariant(());
|
|||
|
|
||||
= note: expected type parameter `T`
|
||||
found unit type `()`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0109]: type arguments are not allowed for this type
|
||||
--> $DIR/enum-variant-generic-args.rs:20:16
|
||||
|
|
@ -61,8 +57,6 @@ LL | Self::SVariant { v: () };
|
|||
|
|
||||
= note: expected type parameter `T`
|
||||
found unit type `()`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0109]: type arguments are not allowed for this type
|
||||
--> $DIR/enum-variant-generic-args.rs:28:26
|
||||
|
|
@ -81,8 +75,6 @@ LL | Self::SVariant::<()> { v: () };
|
|||
|
|
||||
= note: expected type parameter `T`
|
||||
found unit type `()`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0109]: type arguments are not allowed for this type
|
||||
--> $DIR/enum-variant-generic-args.rs:31:16
|
||||
|
|
@ -101,8 +93,6 @@ LL | Self::<()>::SVariant { v: () };
|
|||
|
|
||||
= note: expected type parameter `T`
|
||||
found unit type `()`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0109]: type arguments are not allowed for this type
|
||||
--> $DIR/enum-variant-generic-args.rs:34:16
|
||||
|
|
@ -127,8 +117,6 @@ LL | Self::<()>::SVariant::<()> { v: () };
|
|||
|
|
||||
= note: expected type parameter `T`
|
||||
found unit type `()`
|
||||
= help: type parameters must be constrained to match other types
|
||||
= note: for more information, visit https://doc.rust-lang.org/book/ch10-02-traits.html#traits-as-parameters
|
||||
|
||||
error[E0109]: type arguments are not allowed for this type
|
||||
--> $DIR/enum-variant-generic-args.rs:41:26
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue