Reducing it to 2 was just a failed attempt to see whether that would help fix
some slow cases; in fact, it can create new slow cases by replacing concrete
types by variables.
1266: Chalk integration / method resolution fixes r=matklad a=flodiebold
- fix impl blocks with unresolved target trait being treated as inherent impls
- add traits from prelude for method resolution, and deduplicate them
- blacklist some traits from being considered in where clauses, namely `Send`, `Sync`, `Sized`, and the `Fn` traits. We don't handle these correctly yet for several reasons, and this makes us much less likely to run into cases where Chalk gets very slow (because these usually only happen if there is no solution, and that's more likely to happen for these traits).
- when there's an errored where clause, return just that one (since it will be always false anyway). This also makes things easier on Chalk ;)
Co-authored-by: Florian Diebold <flodiebold@gmail.com>
For Send/Sync/Sized, we don't handle auto traits correctly yet and because they
have a lot of impls, they can easily lead to slowdowns. In the case of
Fn/FnMut/FnOnce, we don't parse the special Fn notation correctly yet and don't
handle closures yet, so we are very unlikely to find an impl.
1262: Where clauses and other Chalk improvements r=matklad a=flodiebold
This adds support for where clauses to the Chalk integration; it also adds FnDef lowering and partly handles auto traits.
One thing I'm not sure about is the error handling -- what do we do if we can't
resolve a trait reference in a where clause? For impls, I think it's clear we
need to disregard the impl for trait solving. I've solved this for now by
introducing an 'unknown trait' that has no impls, so if we encounter an unknown
trait we can use that and basically get a where clause that's always false. (The
alternative would be somehow not returning the impl to Chalk at all, but we
would need to know that we need to do that in `impls_for_trait` already, and we
don't resolve anything there.)
A bit surprisingly, this has almost no impact on the type inference stats for RA, probably because of missing edge cases. Probably impl Trait support and closure support will do more.
Co-authored-by: Florian Diebold <flodiebold@gmail.com>
This is slightly hacky, but maybe more elegant than alternative solutions: We
just use a hardcoded Chalk trait ID which we special-case to have no impls.
1251: Chalk integration improvements r=matklad a=flodiebold
A few improvements that came up while working on where clause support:
- turn `implements` into a query again to improve performance
- allow skipping to a specific function with `analysis-stats`, e.g. `ra_cli analysis-stats --only world_symbols`
- deduplicate impls in impls_for_trait -- previously many impls e.g. from std where repeated many times, this should help performance as well...
- add a `HirDisplay` implementation for TraitRef (not used here anywhere, but useful for debugging)
Co-authored-by: Florian Diebold <flodiebold@gmail.com>
1253: Share literal validation logic with compiler r=matklad a=matklad
This is neat: the unescape module is literary what compiler is using right now:
c6ac575648/src/libsyntax/parse/unescape.rs
So, yeah, code sharing via copy-paste!
Co-authored-by: Aleksey Kladov <aleksey.kladov@gmail.com>
1245: Add profiling to diagnostics r=matklad a=marcogroppo
Add profiling to `diagnostics()` - see #1244.
Co-authored-by: Marco Groppo <marco.groppo@gmail.com>
1242: Fix missing empty vars in $repeat while macro expansion r=matklad a=edwin0cheng
This PR fixes a bug we forget to collect an empty vars in $repeat patterns.
Related issues: #1240
Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>
1208: [WIP] Goto for Macro's r=matklad a=Lapz
Adds goto definition for macros. Currently only works for macros in the current crate ~~otherwise it panics~~. Proper macro resolution needs to be added for it to resolve macros in other crates.
Todo
- [X] Allow goto from macro calls
- [X] Fix panics
- [x] Add tests
Co-authored-by: Lenard Pratt <l3np27@gmail.com>
1216: Basic Chalk integration r=matklad a=flodiebold
This replaces the ad-hoc `implements` check by Chalk. It doesn't yet any new functionality (e.g. where clauses aren't passed to Chalk yet). The tests that exist actually work, but it needs some refactoring, currently crashes when running analysis on the RA repo, and depends on rust-lang/chalk#216 which isn't merged yet 😄
The main work here is converting stuff back and forth and providing Chalk with the information it needs, and the canonicalization logic. Since canonicalization depends a lot on the inference table, I don't think we can currently reuse the logic from Chalk, so we need to implement it ourselves; it's not actually that complicated anyway ;) I realized that we need a `Ty::Bound` variant separate from `Ty::Param` -- these are two different things, and I think type parameters inside a function actually need to be represented in Chalk as `Placeholder` types.
~~Currently this crashes in the 'real' world because we don't yet do canonicalization when filtering method candidates. Proper canonicalization needs the inference table (to collapse different inference variables that have already been unified), but we need to be able to call the method candidate selection from the completion code... So I'm currently thinking how to best handle that 😄~~
Co-authored-by: Florian Diebold <flodiebold@gmail.com>
1239: Fix `$true` and `$false` as $var name error r=matklad a=edwin0cheng
This PR fixed a bug which cannot use `$true` and `$false` as `$var` name in mbe.
Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>
