05d3526132
Add support to `rustc_on_unimplemented` to reference the full path of
the annotated trait. For the following code:
```rust
pub mod Bar {
#[rustc_on_unimplemented = "test error `{Self}` with `{Bar}` `{Baz}` `{Quux}` in `{Foo}`"]
pub trait Foo<Bar, Baz, Quux> {}
}
```
the error message will be:
```
test error `std::string::String` with `u8` `_` `u32` in `Bar::Foo`
```
20 lines
706 B
Plaintext
20 lines
706 B
Plaintext
error[E0277]: the trait bound `[i32]: Index<u32>` is not satisfied
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--> $DIR/on-impl.rs:32:5
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32 | Index::<u32>::index(&[1, 2, 3] as &[i32], 2u32);
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| ^^^^^^^^^^^^^^^^^^^ a usize is required to index into a slice
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= help: the trait `Index<u32>` is not implemented for `[i32]`
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= note: required by `Index::index`
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error[E0277]: the trait bound `[i32]: Index<u32>` is not satisfied
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--> $DIR/on-impl.rs:32:5
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32 | Index::<u32>::index(&[1, 2, 3] as &[i32], 2u32);
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ a usize is required to index into a slice
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= help: the trait `Index<u32>` is not implemented for `[i32]`
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error: aborting due to 2 previous errors
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