rust/tests/ui/rfcs/rfc-2632-const-trait-impl/tilde-const-and-const-params.stderr
Raekye 884af362f2 Validate ~const trait bounds on associated fns.
Previously, any associated function could have `~const` trait bounds on
generic parameters, which could lead to ICEs when these bounds were used
on associated functions of non-`#[const_trait] trait` or
non-`impl const` blocks.

Includes changes as per @fee1-dead's comments in #116210.
2023-09-30 19:00:45 -04:00

46 lines
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error: `~const` is not allowed here
--> $DIR/tilde-const-and-const-params.rs:9:15
|
LL | fn add<A: ~const Add42>(self) -> Foo<{ A::add(N) }> {
| ^^^^^^^^^^^^
|
note: this function is not `const`, so it cannot have `~const` trait bounds
--> $DIR/tilde-const-and-const-params.rs:9:8
|
LL | fn add<A: ~const Add42>(self) -> Foo<{ A::add(N) }> {
| ^^^
error: `~const` is not allowed here
--> $DIR/tilde-const-and-const-params.rs:27:11
|
LL | fn bar<A: ~const Add42, const N: usize>(_: Foo<N>) -> Foo<{ A::add(N) }> {
| ^^^^^^^^^^^^
|
note: this function is not `const`, so it cannot have `~const` trait bounds
--> $DIR/tilde-const-and-const-params.rs:27:4
|
LL | fn bar<A: ~const Add42, const N: usize>(_: Foo<N>) -> Foo<{ A::add(N) }> {
| ^^^
error[E0308]: mismatched types
--> $DIR/tilde-const-and-const-params.rs:27:61
|
LL | fn bar<A: ~const Add42, const N: usize>(_: Foo<N>) -> Foo<{ A::add(N) }> {
| ^^^^^^^^^ expected `false`, found `true`
|
= note: expected constant `false`
found constant `true`
error[E0308]: mismatched types
--> $DIR/tilde-const-and-const-params.rs:9:44
|
LL | fn add<A: ~const Add42>(self) -> Foo<{ A::add(N) }> {
| ^^^^^^^^^ expected `false`, found `true`
|
= note: expected constant `false`
found constant `true`
error: aborting due to 4 previous errors
For more information about this error, try `rustc --explain E0308`.