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Add additional type info to mismatch err

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kadmin 2021-02-13 07:53:28 +00:00
parent 3f5aee2d52
commit be1ed00712
4 changed files with 79 additions and 32 deletions
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13
src/test/ui/const-generics/diagnostics.rs Normal file
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@ -0,0 +1,13 @@
#![crate_type="lib"]
#![feature(const_generics)]
#![allow(incomplete_features)]
struct A<const N: u8>;
trait Foo {}
impl Foo for A<N> {}
//~^ ERROR type provided when a constant
//~| ERROR cannot find type
struct B<const N: u8>;
impl<N> Foo for B<N> {}
//~^ ERROR type provided when a constant

27
src/test/ui/const-generics/diagnostics.stderr Normal file
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@ -0,0 +1,27 @@
error[E0412]: cannot find type `N` in this scope
--> $DIR/diagnostics.rs:7:16
|
LL | struct A<const N: u8>;
| ---------------------- similarly named struct `A` defined here
LL | trait Foo {}
LL | impl Foo for A<N> {}
| ^ help: a struct with a similar name exists: `A`
error[E0747]: type provided when a constant was expected
--> $DIR/diagnostics.rs:7:16
|
LL | impl Foo for A<N> {}
| ^
error[E0747]: type provided when a constant was expected
--> $DIR/diagnostics.rs:12:19
|
LL | impl<N> Foo for B<N> {}
| - ^
| |
| help: try changing to a const-generic parameter:: `const N: u8`
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0412, E0747.
For more information about an error, try `rustc --explain E0412`.

20
src/test/ui/const-generics/invalid-enum.stderr
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@ -30,44 +30,24 @@ error[E0747]: type provided when a constant was expected
|
LL | let _: Example<CompileFlag::A, _> = Example { x: 0 };
| ^^^^^^^^^^^^^^
|
help: if this generic argument was intended as a const parameter, try surrounding it with braces:
|
LL | let _: Example<{ CompileFlag::A }, _> = Example { x: 0 };
| ^ ^
error[E0747]: type provided when a constant was expected
--> $DIR/invalid-enum.rs:33:18
|
LL | let _: Example<Example::ASSOC_FLAG, _> = Example { x: 0 };
| ^^^^^^^^^^^^^^^^^^^
|
help: if this generic argument was intended as a const parameter, try surrounding it with braces:
|
LL | let _: Example<{ Example::ASSOC_FLAG }, _> = Example { x: 0 };
| ^ ^
error[E0747]: type provided when a constant was expected
--> $DIR/invalid-enum.rs:21:12
|
LL | test_1::<CompileFlag::A>();
| ^^^^^^^^^^^^^^
|
help: if this generic argument was intended as a const parameter, try surrounding it with braces:
|
LL | test_1::<{ CompileFlag::A }>();
| ^ ^
error[E0747]: type provided when a constant was expected
--> $DIR/invalid-enum.rs:25:15
|
LL | test_2::<_, CompileFlag::A>(0);
| ^^^^^^^^^^^^^^
|
help: if this generic argument was intended as a const parameter, try surrounding it with braces:
|
LL | test_2::<_, { CompileFlag::A }>(0);
| ^ ^
error: aborting due to 7 previous errors