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Rollup merge of #88182 - spastorino:use-trait-in-tait-tests, r=oli-obk

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We meant to use a trait instead of lifetime here

r? `@oli-obk`

Related to #86727
This commit is contained in:
Jack Huey 2021-08-21 20:56:33 -04:00 committed by GitHub
commit 5be51f27b4
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4 changed files with 12 additions and 33 deletions
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3
src/test/ui/type-alias-impl-trait/generic_underconstrained.rs
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@ -3,8 +3,7 @@
fn main() {}
trait Trait {}
type Underconstrained<T: Trait> = impl 'static;
//~^ ERROR: at least one trait must be specified
type Underconstrained<T: Trait> = impl Send;
// no `Trait` bound
fn underconstrain<T>(_: T) -> Underconstrained<T> {

12
src/test/ui/type-alias-impl-trait/generic_underconstrained.stderr
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@ -1,11 +1,5 @@
error: at least one trait must be specified
--> $DIR/generic_underconstrained.rs:6:35
|
LL | type Underconstrained<T: Trait> = impl 'static;
| ^^^^^^^^^^^^
error[E0277]: the trait bound `T: Trait` is not satisfied
--> $DIR/generic_underconstrained.rs:10:31
--> $DIR/generic_underconstrained.rs:9:31
|
LL | fn underconstrain<T>(_: T) -> Underconstrained<T> {
| ^^^^^^^^^^^^^^^^^^^ the trait `Trait` is not implemented for `T`
@ -13,13 +7,13 @@ LL | fn underconstrain<T>(_: T) -> Underconstrained<T> {
note: required by a bound in `Underconstrained`
--> $DIR/generic_underconstrained.rs:6:26
|
LL | type Underconstrained<T: Trait> = impl 'static;
LL | type Underconstrained<T: Trait> = impl Send;
| ^^^^^ required by this bound in `Underconstrained`
help: consider restricting type parameter `T`
|
LL | fn underconstrain<T: Trait>(_: T) -> Underconstrained<T> {
| +++++++
error: aborting due to 2 previous errors
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.

6
src/test/ui/type-alias-impl-trait/generic_underconstrained2.rs
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@ -2,8 +2,7 @@
fn main() {}
type Underconstrained<T: std::fmt::Debug> = impl 'static;
//~^ ERROR: at least one trait must be specified
type Underconstrained<T: std::fmt::Debug> = impl Send;
// not a defining use, because it doesn't define *all* possible generics
fn underconstrained<U>(_: U) -> Underconstrained<U> {
@ -11,8 +10,7 @@ fn underconstrained<U>(_: U) -> Underconstrained<U> {
5u32
}
type Underconstrained2<T: std::fmt::Debug> = impl 'static;
//~^ ERROR: at least one trait must be specified
type Underconstrained2<T: std::fmt::Debug> = impl Send;
// not a defining use, because it doesn't define *all* possible generics
fn underconstrained2<U, V>(_: U, _: V) -> Underconstrained2<V> {

24
src/test/ui/type-alias-impl-trait/generic_underconstrained2.stderr
View File

@ -1,17 +1,5 @@
error: at least one trait must be specified
--> $DIR/generic_underconstrained2.rs:5:45
|
LL | type Underconstrained<T: std::fmt::Debug> = impl 'static;
| ^^^^^^^^^^^^
error: at least one trait must be specified
--> $DIR/generic_underconstrained2.rs:14:46
|
LL | type Underconstrained2<T: std::fmt::Debug> = impl 'static;
| ^^^^^^^^^^^^
error[E0277]: `U` doesn't implement `Debug`
--> $DIR/generic_underconstrained2.rs:9:33
--> $DIR/generic_underconstrained2.rs:8:33
|
LL | fn underconstrained<U>(_: U) -> Underconstrained<U> {
| ^^^^^^^^^^^^^^^^^^^ `U` cannot be formatted using `{:?}` because it doesn't implement `Debug`
@ -19,7 +7,7 @@ LL | fn underconstrained<U>(_: U) -> Underconstrained<U> {
note: required by a bound in `Underconstrained`
--> $DIR/generic_underconstrained2.rs:5:26
|
LL | type Underconstrained<T: std::fmt::Debug> = impl 'static;
LL | type Underconstrained<T: std::fmt::Debug> = impl Send;
| ^^^^^^^^^^^^^^^ required by this bound in `Underconstrained`
help: consider restricting type parameter `U`
|
@ -27,21 +15,21 @@ LL | fn underconstrained<U: std::fmt::Debug>(_: U) -> Underconstrained<U> {
| +++++++++++++++++
error[E0277]: `V` doesn't implement `Debug`
--> $DIR/generic_underconstrained2.rs:18:43
--> $DIR/generic_underconstrained2.rs:16:43
|
LL | fn underconstrained2<U, V>(_: U, _: V) -> Underconstrained2<V> {
| ^^^^^^^^^^^^^^^^^^^^ `V` cannot be formatted using `{:?}` because it doesn't implement `Debug`
|
note: required by a bound in `Underconstrained2`
--> $DIR/generic_underconstrained2.rs:14:27
--> $DIR/generic_underconstrained2.rs:13:27
|
LL | type Underconstrained2<T: std::fmt::Debug> = impl 'static;
LL | type Underconstrained2<T: std::fmt::Debug> = impl Send;
| ^^^^^^^^^^^^^^^ required by this bound in `Underconstrained2`
help: consider restricting type parameter `V`
|
LL | fn underconstrained2<U, V: std::fmt::Debug>(_: U, _: V) -> Underconstrained2<V> {
| +++++++++++++++++
error: aborting due to 4 previous errors
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.