177e7ff548
When `#![feature(min_generic_const_args)]` is enabled, we now lower all const paths in generic arg position to `hir::ConstArgKind::Path`. We then lower assoc const paths to `ty::ConstKind::Unevaluated` since we can no longer use the anon const expression lowering machinery. In the process of implementing this, I factored out `hir_ty_lowering` code that is now shared between lowering assoc types and assoc consts. This PR also introduces a `#[type_const]` attribute for trait assoc consts that are allowed as const args. However, we still need to implement code to check that assoc const definitions satisfy `#[type_const]` if present (basically is it a const path or a monomorphic anon const).
16 lines
469 B
Plaintext
16 lines
469 B
Plaintext
error[E0223]: ambiguous associated constant
|
|
--> $DIR/ambiguous-assoc-const.rs:10:20
|
|
|
|
|
LL | fn foo() -> Blah<{ Tr::N }> {
|
|
| ^^^^^
|
|
|
|
|
help: if there were a type named `Example` that implemented `Tr`, you could use the fully-qualified path
|
|
|
|
|
LL - fn foo() -> Blah<{ Tr::N }> {
|
|
LL + fn foo() -> Blah<{ <Example as Tr>::N }> {
|
|
|
|
|
|
|
error: aborting due to 1 previous error
|
|
|
|
For more information about this error, try `rustc --explain E0223`.
|