Recover from missing semicolon based on the found token
When encountering one of a few keywords when a semicolon was
expected, suggest the semicolon and recover:
```
error: expected one of `.`, `;`, `?`, or an operator, found `let`
--> $DIR/recover-missing-semi.rs:4:5
|
LL | let _: usize = ()
| - help: missing semicolon here
LL |
LL | let _ = 3;
| ^^^
error[E0308]: mismatched types
--> $DIR/recover-missing-semi.rs:2:20
|
LL | let _: usize = ()
| ^^ expected usize, found ()
|
= note: expected type `usize`
found type `()`
```
clarify what the item is in "not a module" error
The motivation here was that I was trying to import an associated constant when I thought it was an enum variant, and got confused by this error.
Ideally I would like to add a note saying that associated constants, types, and methods cannot be imported, but I'm not sure that the associated items for a `Def` can be checked at resolve time.
Remove check_match from const_eval
This fixes#59378.
It seems that the `check_match` may be unnecessary, so this removes it per instructions provided in the issue. I re-ran the tests for `librustc_mir` and everything seemed fine!
This commit changes the suggestion so that it is split into multiple
parts in an effort to reduce the impact the applied suggestion could
have on formatting.
This commit removes the assumption that the start of a use statement
will always be on one line with a single space - which was silly in the
first place.
This commit introduces more dirty span manipulation into the compiler
in order to handle the various edge cases in moving/renaming the macro
import so it is at the root of the import.
This commit suggests importing a macro from the root of a crate as the
intent may have been to import a macro from the definition location that
was annotated with `#[macro_export]`.
When encountering one of a few keywords when a semicolon was
expected, suggest the semicolon and recover:
```
error: expected one of `.`, `;`, `?`, or an operator, found `let`
--> $DIR/recover-missing-semi.rs:4:5
|
LL | let _: usize = ()
| - help: missing semicolon here
LL |
LL | let _ = 3;
| ^^^
error[E0308]: mismatched types
--> $DIR/recover-missing-semi.rs:2:20
|
LL | let _: usize = ()
| ^^ expected usize, found ()
|
= note: expected type `usize`
found type `()`
```
This commit adds a test that demonstrates the compiler's current
behaviour when a function attempts to return a value that was unwrapped
by a `?` operator when the omission of `?` would have made the code
compile.
This commit adds a test demonstrating the current behaviour when a macro
defined in a module with the `#[macro_export]` is imported from the
module rather than the crate root.
