rust/compiler/rustc_typeck
Esteban Küber 8567b686f9 On E0204 suggest missing type param bounds
```
error[E0204]: the trait `Copy` may not be implemented for this type
  --> f42.rs:9:17
   |
9  | #[derive(Debug, Copy, Clone)]
   |                 ^^^^
10 | pub struct AABB<K>{
11 |     pub loc: Vector2<K>,
   |     ------------------- this field does not implement `Copy`
12 |     pub size: Vector2<K>
   |     -------------------- this field does not implement `Copy`
   |
note: the `Copy` impl for `Vector2<K>` requires that `K: Debug`
  --> f42.rs:11:5
   |
11 |     pub loc: Vector2<K>,
   |     ^^^^^^^^^^^^^^^^^^^
note: the `Copy` impl for `Vector2<K>` requires that `K: Debug`
  --> f42.rs:12:5
   |
12 |     pub size: Vector2<K>
   |     ^^^^^^^^^^^^^^^^^^^^
   = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider restricting type parameter `K`
   |
10 | pub struct AABB<K: Debug>{
   |                  +++++++
```

Fix #89137.
2022-06-02 12:54:04 -07:00
..

For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.