| Commit message (Collapse) | Author | Age | Files | Lines |
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If the first type parameter gets inferred, that's still not handled correctly;
it'll require some more refactoring: E.g. if we have `Thing<T, F=fn() -> T>` and
then instantiate `Thing<_>`, that gets turned into `Thing<_, fn() -> _>` before
the `_` is instantiated into a type variable -- so afterwards, we have two type
variables without any connection to each other.
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This is working, but I'm not that happy with how the lowering works. We might
need an additional representation between `TypeRef` and `Ty` where names are
resolved and `impl Trait` bounds are separated out, but things like inference
variables don't exist and `impl Trait` is always represented the same
way.
Also note that this doesn't implement correct handling of RPIT *inside* the
function (which involves turning the `impl Trait`s into variables and creating
obligations for them). That intermediate representation might help there as
well.
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This should fix some of the worst performance problems.
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This speeds up inference in analysis-stats by ~30% (even more with the recursive
solver).
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It improves compile time in `--release` mode quite a bit, it doesn't
really slow things down and, conceptually, it seems closer to what we
want the physical architecture to look like (we don't want to
monomorphise EVERYTHING in a single leaf crate).
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This slows down analysis-stats a bit (~5% in my measurement), but improves
incremental checking a lot because we can reuse trait solve results.
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don't belong
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This is the same change as we did with `crate_def_map` and it does seem
that we mostly spend time in salsa, without recomputing much on
rust-analyzer side.
Example output:
```
233ms - handle_inlay_hints
163ms - get_inlay_hints
163ms - SourceAnalyzer::new
67ms - def_with_body_from_child_node
67ms - analyze_container
67ms - analyze_container
67ms - Module::from_definition
67ms - Module::from_file
67ms - crate_def_map
0ms - parse_macro_query (6 calls)
0ms - raw_items_query (1 calls)
66ms - ???
0ms - crate_def_map (1 calls)
0ms - crate_def_map (1 calls)
96ms - infer
2ms - trait_solve_query (2 calls)
94ms - ???
0ms - body_with_source_map_query (1 calls)
0ms - crate_def_map (1 calls)
[...]
```
Signed-off-by: Michal Terepeta <[email protected]>
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- impl Trait<Self> for S is allowed
- impl Trait for S<Self> is an invalid cycle, but we can add cycle recovery for
it in Salsa now
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