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3960: ellipsis in tuple patterns r=JoshMcguigan a=JoshMcguigan
This PR lowers ellipsis in tuple patterns. It fixes a bug in the way ellipsis were previously lowered (by replacing the ellipsis with a single `Pat::Wild` no matter how many items the `..` was taking the place of).
It also uses this new information to properly handle `..` in tuple struct patterns when perform match statement exhaustiveness checks.
While this PR provides the building blocks for match statement exhaustiveness checks for tuples, there are some additional challenges there, so that is still unimplemented (unlike tuple structs).
Co-authored-by: Josh Mcguigan <[email protected]>
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3938: fix missing match arm false positive r=flodiebold a=JoshMcguigan
This fixes #3932 by skipping the missing match arm diagnostic in the case any of the match arms don't type check properly against the match expression.
I think this is the appropriate behavior for this diagnostic, since `is_useful` relies on all match arms being well formed, and the case of a malformed match arm should probably be handled by a different diagnostic.
Co-authored-by: Josh Mcguigan <[email protected]>
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ellipsis behavior
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3955: Align grammar for record patterns and literals r=matklad a=matklad
The grammar now looks like this
[name_ref :] pat
bors r+
🤖
Co-authored-by: Aleksey Kladov <[email protected]>
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The grammar now looks like this
[name_ref :] pat
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3925: Implement assist "Reorder field names" r=matklad a=geoffreycopin
This PR implements the "Reorder record fields" assist as discussed in issue #3821 .
Adding a `RecordFieldPat` variant to the `Pat` enum seemed like the easiest way to handle the `RecordPat` children as a single sequence of elements, maybe there is a better way ?
Co-authored-by: Geoffrey Copin <[email protected]>
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3951: Simplify records grammar r=matklad a=matklad
bors r+
🤖
Co-authored-by: Aleksey Kladov <[email protected]>
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We used
name [: expr]
grammar before, now it is
[name :] expr
which makes things simpler
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3944: Look up trait impls by self type r=matklad a=flodiebold
This speeds up inference in analysis-stats by ~30% (even more with the recursive solver).
There's a slight difference in inferred types, which I think comes from pre-existing wrong handling of error types in impls, so I think it's fine.
Co-authored-by: Florian Diebold <[email protected]>
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This speeds up inference in analysis-stats by ~30% (even more with the recursive
solver).
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Change missing impl assist to use todo!() instead of unimplemented()
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todo!() "Indicates unfinished code" (https://doc.rust-lang.org/std/macro.todo.html)
Rust documentation provides further clarification:
> The difference between unimplemented! and todo! is that while todo!
> conveys an intent of implementing the functionality later and the
> message is "not yet implemented", unimplemented! makes no such claims.
todo!() seems more appropriate for assists that insert missing impls.
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Hide parameter hints for single-argument functions with the same name
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3920: Implement expand_task and list_macros in proc_macro_srv r=matklad a=edwin0cheng
This PR finish up the remain `proc_macro_srv` implementation :
1. Added dylib loading code for proc-macro crate dylib. Note that we have to add some special flags for unix loading because of a bug in old version of glibc, see https://github.com/fedochet/rust-proc-macro-panic-inside-panic-expample/issues/1 and https://github.com/rust-lang/rust/issues/60593 for details.
2. Added tests for proc-macro expansion: We use a trick here by adding `serde_derive` to dev-dependencies and calling `cargo-metadata` for searching its dylib path, and expand it in our tests.
[EDIT]
Note that this PR **DO NOT** implement the final glue code with rust-analzyer and proc-macro-srv yet.
Co-authored-by: Edwin Cheng <[email protected]>
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closes #3927
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