fix: resolve all inference vars in `InferenceResult::assoc_resolutions`
I think this fixes '#13773, ~but still haven't found repro. I'll try finding one so we can have a regression test~.
We should resolve every inference variable in `InferenceResult` after inference is done. We started recording `Substitution`s for each resolved associated items in #13725, but failed to do so which causes crash when analyzing source in IDE layer.
fix: make make_body respect comments in extract_function
Possible fix for #13621
### Points to help in review:
- Earlier we were only considering statements in a block expr and hence comments were being ignored, now we handle tokens hence making it aware of comments and then preserving them using `hacky_block_expr_with_comments`
Seems like I am not able to attach output video, github is glitching for it :(
fix: breaking snippets on typed incomplete suggestions
Possible fix for #7929
Fix the case where if a user types `&&42.o`, snippet completion was still applying &&Ok(42). Note this was fixed previously on `&&42.` but this still remained a problem for this case
Previous relevant PR: #13517
### Points to help in review:
- The main problem why everything broke on adding an extra `o` was, earlier `dot_receiver` was `42.` which was a `LITERAL` but now `42.o` becomes a `FIELD_EXPR`
- Till now `include_references` was just checking for parent of `LITERAL` and if it was a `REF_EXPR`, but now we consider `FIELD_EXPR` and traverse all of them, finally to reach `REF_EXPR`. If `REF_EXPR` is not found we just return the original `initial_element`
- We are constructing a new node during `include_references` because if we rely on `dot_receiver` solely we would get `&&42.o` to be replaced with, but we want `&&42` to be replaced with
### Output Video:
https://user-images.githubusercontent.com/49019259/205420166-efbdef78-5b3a-4aef-ab4b-d892dac056a0.mov
Hope everything I wrote makes sense 😅
Also interestingly previous PR's number was `13517` and this PR's number is `13715`, nicee
feat: allow unwrap block in let initializers
Possible fix for #13679
### Points to help in review:
- I just added a parent case for let statements and it seems everything else was in place already, so turned out to be a small fix
fix: add fallback case in generated `PartialEq` impl
Partially fixes#13727.
When generating `PartialEq` implementations for enums, the original code can already generate the following fallback case:
```rs
_ => std::mem::discriminant(self) == std::mem::discriminant(other),
```
However, it has been suppressed in the following example for no good reason:
```rs
enum Either<T, U> {
Left(T),
Right(U),
}
impl<T, U> PartialEq for Either<T, U> {
fn eq(&self, other: &Self) -> bool {
match (self, other) {
(Self::Left(l0), Self::Left(r0)) => l0 == r0,
(Self::Right(l0), Self::Right(r0)) => l0 == r0,
// _ => std::mem::discriminant(self) == std::mem::discriminant(other),
// ^ this completes the match arms!
}
}
}
```
This PR has removed that suppression logic.
~~Of course, the PR could have suppressed the fallback case generation for single-variant enums instead, but I believe that this case is quite rare and should be caught by `#[warn(unreachable_patterns)]` anyway.~~
After this fix, when the enum has >1 variants, the following fallback arm will be generated :
* `_ => false,` if we've already gone through every case where the variants of `self` and `other` match;
* The original one (as stated above) in other cases.
---
Note: The code example is still wrong after the fix due to incorrect trait bounds.
fix: normalize projection after discarding free `BoundVar`s in RPIT
Fixes#13307
When we lower the return type of a function, it may contain free `BoundVar`s in `OpaqueType`'s substitution, which would cause panic during canonicalization as part of projection normalization. Those `BoundVar`s are irrelevant in this context and will be discarded, and we should defer projection normalization until then.
fix: only shift `BoundVar`s that come from outside lowering context
Fixes#13734
There are some free functions `TyLoweringContext` methods call, which do not know anything about current binders in scope. We need to shift in the `BoundVar`s in substitutions that we get from them (#4952), but not those we get from `TyLoweringContext` methods.
Compute data layout of types
cc #4091
Things that aren't working:
* Closures
* Generators (so no support for `Future` I think)
* Opaque types
* Type alias and associated types which may need normalization
Things that show wrong result:
* ~Enums with explicit discriminant~
* SIMD types
* ~`NonZero*` and similar standard library items which control layout with special attributes~
At the user level, I didn't put much work, since I wasn't confident about what is the best way to present this information. Currently it shows size and align for ADTs, and size, align, offset for struct fields, in the hover, similar to clangd. I used it some days and I feel I liked it, but we may consider it too noisy and move it to an assist or command.
