The logic for importing with and without `group_imports` differed
significantly when no previous group existed. This lead to the problem
of using the wrong position when importing inside a module (#11585) or
when inner attributes are involved.
The existing code for grouped imports is better and takes these things
into account.
This PR changes the flow to use the pre-existing code for adding a new
import group even for the non-grouped import settings.
Some coverage markers are updated and the `group` is removed, since they
are now invoked in both cases (grouping and no grouping).
Tests are updated and two tests (empty module and inner attribute) are
added.
Fixes#11585
11791: fix: some fixes and improvements to signature help r=jonas-schievink a=jonas-schievink
bors r+
Co-authored-by: Jonas Schievink <jonas.schievink@ferrous-systems.com>
11774: feat: Tag macro calls as unsafe if they expand to unsafe expressions r=Veykril a=Veykril
as long as they aren't inside an unsafe block inside the macro that is.
Co-authored-by: Lukas Wirth <lukastw97@gmail.com>
11598: feat: Parse destructuring assignment r=Veykril a=ChayimFriedman2
Part of #11532.
Lowering is not as easy and may not even be feasible right now as it requires generating identifiers: `(a, b) = (b, a)` is desugared into
```rust
{
let (<gensym_a>, <gensym_b>) = (b, a);
a = <gensym_a>;
b = <gensym_b>;
}
```
rustc uses hygiene to implement that, but we don't support hygiene yet.
However, I think parsing was the main problem as lowering will just affect type inference, and while `{unknown}` is not nice it's much better than a syntax error.
I'm still looking for the best way to do lowering, though.
Fixes#11454.
Co-authored-by: Chayim Refael Friedman <chayimfr@gmail.com>
- don't return the receiver type from method resolution; instead just
return the autorefs/autoderefs that happened and repeat them. This
ensures all the effects like trait obligations and whatever we learned
about type variables from derefing them are actually applied. Also, it
allows us to get rid of `decanonicalize_ty`, which was just wrong in
principle.
- Autoderef itself now directly works with an inference table. Sadly
this has the effect of making it harder to use as an iterator, often
requiring manual `while let` loops. (rustc works around this by using
inner mutability in the inference context, so that things like unifying
types don't require a unique reference.)
- We now record the adjustments (autoref/deref) for method receivers
and index expressions, which we didn't before.
- Removed the redundant crate parameter from method resolution, since
the trait_env contains the crate as well.
- in the HIR API, the methods now take a scope to determine the trait env.
`Type` carries a trait env, but I think that's probably a bad decision
because it's easy to create it with the wrong env, e.g. by using
`Adt::ty`. This mostly didn't matter so far because
`iterate_method_candidates` took a crate parameter and ignored
`self.krate`, but the trait env would still have been wrong in those
cases, which I think would give some wrong results in some edge cases.
Fixes#10058.
