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Fix assoc-type test

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This commit is contained in:
Deadbeef 2021-07-26 11:13:23 +08:00
parent 01bb3710b5
commit bcf0e2f528
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3 changed files with 29 additions and 5 deletions
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7
src/test/ui/rfc-2632-const-trait-impl/assoc-type.rs
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@ -1,8 +1,4 @@
// ignore-test
//
// FIXME: This test should fail since, within a const impl of `Foo`, the bound on `Foo::Bar` should
// require a const impl of `Add` for the associated type.
// FIXME(fee1-dead): this should have a better error message
#![feature(const_trait_impl)]
struct NonConstAdd(i32);
@ -21,6 +17,7 @@ trait Foo {
impl const Foo for NonConstAdd {
type Bar = NonConstAdd;
//~^ ERROR
}
fn main() {}

18
src/test/ui/rfc-2632-const-trait-impl/assoc-type.stderr Normal file
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@ -0,0 +1,18 @@
error[E0277]: cannot add `NonConstAdd` to `NonConstAdd`
--> $DIR/assoc-type.rs:19:5
|
LL | type Bar: std::ops::Add;
| ------------- required by this bound in `Foo::Bar`
...
LL | type Bar = NonConstAdd;
| ^^^^^^^^^^^^^^^^^^^^^^^ no implementation for `NonConstAdd + NonConstAdd`
|
= help: the trait `Add` is not implemented for `NonConstAdd`
help: consider introducing a `where` bound, but there might be an alternative better way to express this requirement
|
LL | impl const Foo for NonConstAdd where NonConstAdd: Add {
| ^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.