rust/tests/ui/const-generics/bad-subst-const-kind.stderr

error: the constant `N` is not of type `usize`
  --> $DIR/bad-subst-const-kind.rs:8:26
   |
LL | impl<const N: u64> Q for [u8; N] {
   |                          ^^^^^^^ expected `usize`, found `u64`

error: the constant `13` is not of type `u64`
  --> $DIR/bad-subst-const-kind.rs:14:24
   |
LL | pub fn test() -> [u8; <[u8; 13] as Q>::ASSOC] {
   |                        ^^^^^^^^ expected `u64`, found `usize`
   |
note: required for `[u8; 13]` to implement `Q`
  --> $DIR/bad-subst-const-kind.rs:8:20
   |
LL | impl<const N: u64> Q for [u8; N] {
   |      ------------  ^     ^^^^^^^
   |      |
   |      unsatisfied trait bound introduced here

error[E0308]: mismatched types
  --> $DIR/bad-subst-const-kind.rs:8:31
   |
LL | impl<const N: u64> Q for [u8; N] {
   |                               ^ expected `usize`, found `u64`

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0308`.
Add `ConstArgKind::Path` and make `ConstArg` its own HIR node This is a very large commit since a lot needs to be changed in order to make the tests pass. The salient changes are: - `ConstArgKind` gets a new `Path` variant, and all const params are now represented using it. Non-param paths still use `ConstArgKind::Anon` to prevent this change from getting too large, but they will soon use the `Path` variant too. - `ConstArg` gets a distinct `hir_id` field and its own variant in `hir::Node`. This affected many parts of the compiler that expected the parent of an `AnonConst` to be the containing context (e.g., an array repeat expression). They have been changed to check the "grandparent" where necessary. - Some `ast::AnonConst`s now have their `DefId`s created in rustc_ast_lowering rather than `DefCollector`. This is because in some cases they will end up becoming a `ConstArgKind::Path` instead, which has no `DefId`. We have to solve this in a hacky way where we guess whether the `AnonConst` could end up as a path const since we can't know for sure until after name resolution (`N` could refer to a free const or a nullary struct). If it has no chance as being a const param, then we create a `DefId` in `DefCollector` -- otherwise we decide during ast_lowering. This will have to be updated once all path consts use `ConstArgKind::Path`. - We explicitly use `ConstArgHasType` for array lengths, rather than implicitly relying on anon const type feeding -- this is due to the addition of `ConstArgKind::Path`. - Some tests have their outputs changed, but the changes are for the most part minor (including removing duplicate or almost-duplicate errors). One test now ICEs, but it is for an incomplete, unstable feature and is now tracked at #127009. 2024-07-16 21:07:36 -05:00			error: the constant `N` is not of type `usize`
			`--> $DIR/bad-subst-const-kind.rs:8:26`
			`\|`
			`LL \| impl<const N: u64> Q for [u8; N] {`
			\| ^^^^^^^ expected `usize`, found `u64`

Partially implement `ConstArgHasType` 2024-05-29 11:06:50 -05:00			error: the constant `13` is not of type `u64`
Retroactively feature gate `ConstArgKind::Path` 2024-08-18 19:14:09 -05:00			`--> $DIR/bad-subst-const-kind.rs:14:24`
Make generic const type mismatches not hide trait impls from the trait solver 2024-01-17 08:57:48 -06:00			`\|`
Partially implement `ConstArgHasType` 2024-05-29 11:06:50 -05:00			`LL \| pub fn test() -> [u8; <[u8; 13] as Q>::ASSOC] {`
			\| ^^^^^^^^ expected `u64`, found `usize`
Make generic const type mismatches not hide trait impls from the trait solver 2024-01-17 08:57:48 -06:00			`\|`
Partially implement `ConstArgHasType` 2024-05-29 11:06:50 -05:00			note: required for `[u8; 13]` to implement `Q`
			`--> $DIR/bad-subst-const-kind.rs:8:20`
			`\|`
			`LL \| impl<const N: u64> Q for [u8; N] {`
			`\| ------------ ^ ^^^^^^^`
			`\| \|`
			`\| unsatisfied trait bound introduced here`
Make generic const type mismatches not hide trait impls from the trait solver 2024-01-17 08:57:48 -06:00
Retroactively feature gate `ConstArgKind::Path` 2024-08-18 19:14:09 -05:00			`error[E0308]: mismatched types`
			`--> $DIR/bad-subst-const-kind.rs:8:31`
			`\|`
			`LL \| impl<const N: u64> Q for [u8; N] {`
			\| ^ expected `usize`, found `u64`

			`error: aborting due to 3 previous errors`
Constrain const vars to error if const types are mismatched 2023-03-18 21:17:44 -05:00
Retroactively feature gate `ConstArgKind::Path` 2024-08-18 19:14:09 -05:00			For more information about this error, try `rustc --explain E0308`.