bors[bot] [Sun, 6 Jun 2021 14:50:06 +0000 (14:50 +0000)]
Merge #9155
9155: internal: replace attribute with equivalent whitespace r=jonas-schievink a=jonas-schievink
This is needed to that the `TokenMap` we create contains offsets that match the source. Currently the offsets don't match because the attribute is removed, shifting all subsequent token offsets by the attribute's text length.
Currently this fix has no visible effect because we don't remap tokens in attribute macros.
bors r+
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
bors[bot] [Sat, 5 Jun 2021 11:16:46 +0000 (11:16 +0000)]
Merge #9148
9148: minor: Prevent renaming of aliases on usages r=Veykril a=Veykril
Otherwise trying to rename a usage that goes through an alias will still rename the aliased item instead, cc https://github.com/rust-analyzer/rust-analyzer/issues/5671
bors r+
bors[bot] [Fri, 4 Jun 2021 13:55:49 +0000 (13:55 +0000)]
Merge #9136
9136: feat: Add function references hover action r=Veykril a=Veykril
This is off by default as this can slow down hover messages significantly for very big projects I believe.
Fixes #6590
bors r+
This adds experimental support for attribute macros. They can be enabled by setting `rust-analyzer.experimental.procAttrMacros` to `true`.
Known issues:
* Tokens aren't remapped, presumably because we edit the input syntax tree (this causes IDE features to not work inside items with attribute macros on them)
* Macro errors aren't reported correctly
https://github.com/rust-analyzer/rust-analyzer/issues/6740 is still not fixed – we now expand `#[proc_macro_hack]`, but fail to expand the resulting `proc_macro_call!()` macro.
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
bors[bot] [Thu, 3 Jun 2021 14:26:07 +0000 (14:26 +0000)]
Merge #9130
9130: Prefix/suffix parameter inlay hint hiding heuristic is more strict r=Veykril a=Veykril
Instead of just plainly checking prefix/suffix of the argument string to the parameter name we only check for prefixes and suffixes if they are split apart via an underscore meaning, with the argument `foo`, it will be hidden for the parameter name `foo_bar` but not for `foobar`.
bors[bot] [Wed, 2 Jun 2021 17:25:11 +0000 (17:25 +0000)]
Merge #9108
9108: Don't show extract into variable assist for unit expressions r=jonas-schievink a=brandondong
**Reproduction:**
```rust
fn main() {
let mut i = 3;
$0if i >= 0 {
i += 1;
} else {
i -= 1;
}$0
}
```
1. Select the snippet of code between the $0's.
2. The extract into variable assist shows up, pushing down the more useful extract into function assist.
3. The resulting output of selecting the extract into variable assist is valid but with the extracted variable having the unit type:
```rust
fn main() {
let mut i = 3;
let var_name = if i >= 0 {
i += 1;
} else {
i -= 1;
};
var_name
}
```
**Fix:**
- Don't show the extract into variable assist for unit expressions. I could not think of any scenarios where such a variable extraction would be desired.
Part of https://github.com/rust-analyzer/rust-analyzer/issues/9056
Our previous implementation was incorrect (presumably because of the misleading comment in libstd [here](https://github.com/rust-lang/rust/blob/a7890c7952bdc9445eb6c63dc671fa7a1ab0260d/library/std/src/lib.rs#L339-L343)). `#[prelude_import]` does not define the prelude, it can only override the implicit prelude for the current crate.
This PR fixes that, which also makes the prelude imports in `rustc_span` work. Closes https://github.com/rust-analyzer/rust-analyzer/issues/8815.
bors r+
Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>
bors[bot] [Mon, 31 May 2021 21:01:52 +0000 (21:01 +0000)]
Merge #8717
8717: Update match checking algorithm r=iDawer a=iDawer
I've recently got interest in the match checking to extend the current algo to support reporting witnesses of non-exhaustiveness.
It appears the algo is outdated from rustc's implementation. I decided to rewrite it based on the latest rustc's version. It is a diff-based port to ra codebase. That means you can diff-compare these files to rustc.
I'm striving to keep minimal ra-related changes in the algo to make it easier to backport future changes from the upstream.
Based on upstream algorithm of version rust-lang/rust 1.52.0-nightly (25c15cdbe 2021-04-22)
https://github.com/rust-lang/rust/blob/25c15cdbe/compiler/rustc_mir_build/src/thir/pattern/usefulness.rs
The goal of this PR is to cover the current `missing-match-arm` diagnostic.
What is remaining to do:
- [x] Error handling. The errors that are unrelated to match checking will be handled before the check. Just like how it made in rustc.
- [x] Lowering `hir_def::expr::Pat` to `hir_ty::diagnostics::match_check::Pat`. rustc's match checking works on top of `rustc_mir_build::thir::Pat`, which is lowered from `hir::Pat` and carries some extra semantics used by the check. All unrelated checks are done there. RA could use this to rule out running the check on unimplemented cases (`Pat::ConstBlock`, etc).
- [x] ~~Proper~~Loose typecheck of match arm patterns (https://github.com/rust-analyzer/rust-analyzer/pull/8840, https://github.com/rust-analyzer/rust-analyzer/pull/8875).
- [x] Tests from `hir_ty::diagnostics::match_check::tests`.
- [x] Clean up `todo`s
- [x] Test run on real repos https://github.com/rust-analyzer/rust-analyzer/pull/8717#issuecomment-847120265.
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