Improve selection errors for `~const` trait bounds

[rust.git] / src / test / ui / consts / const-block-const-bound.stderr

diff --git a/src/test/ui/consts/const-block-const-bound.stderr b/src/test/ui/consts/const-block-const-bound.stderr
index 5f912c66bb97c5ea6947261ce482fd21cc14b6de..b5f5694ba83284d7581f60aa9ce97636ac401e39 100644 (file)
--- a/src/test/ui/consts/const-block-const-bound.stderr
+++ b/src/test/ui/consts/const-block-const-bound.stderr
@@ -1,8 +1,8 @@
-error[E0277]: the trait bound `UnconstDrop: Drop` is not satisfied
+error[E0277]: the trait bound `UnconstDrop: ~const Drop` is not satisfied
   --> $DIR/const-block-const-bound.rs:18:11
    |
 LL |         f(UnconstDrop);
-   |         - ^^^^^^^^^^^ the trait `Drop` is not implemented for `UnconstDrop`
+   |         - ^^^^^^^^^^^ expected an implementor of trait `~const Drop`
    |         |
    |         required by a bound introduced by this call
    |
@@ -11,16 +11,18 @@ note: required by a bound in `f`
    |
 LL | const fn f<T: ~const Drop>(x: T) {}
    |               ^^^^^^^^^^^ required by this bound in `f`
-help: consider introducing a `where` bound, but there might be an alternative better way to express this requirement
+help: consider borrowing here
    |
-LL | fn main() where UnconstDrop: Drop {
-   |           +++++++++++++++++++++++
+LL |         f(&UnconstDrop);
+   |           +
+LL |         f(&mut UnconstDrop);
+   |           ++++
 
-error[E0277]: the trait bound `NonDrop: Drop` is not satisfied
+error[E0277]: the trait bound `NonDrop: ~const Drop` is not satisfied
   --> $DIR/const-block-const-bound.rs:20:11
    |
 LL |         f(NonDrop);
-   |         - ^^^^^^^ the trait `Drop` is not implemented for `NonDrop`
+   |         - ^^^^^^^ expected an implementor of trait `~const Drop`
    |         |
    |         required by a bound introduced by this call
    |
@@ -29,6 +31,12 @@ note: required by a bound in `f`
    |
 LL | const fn f<T: ~const Drop>(x: T) {}
    |               ^^^^^^^^^^^ required by this bound in `f`
+help: consider borrowing here
+   |
+LL |         f(&NonDrop);
+   |           +
+LL |         f(&mut NonDrop);
+   |           ++++
 
 error: aborting due to 2 previous errors