fix: Correctly check for parentheses redundancy in `remove_parentheses` assist
This is quite a bunch of code and some hacks, but I _think_ this time it's correct.
I've added a lot of tests, most of which fail with the assist impl from #13733 :')
Complete enum variants without parens when snippets are disabled
This handles the portion of #13767 that bothered me, but I can try to work on the other parts we discussed if needed.
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.
