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path: root/crates/ra_hir_ty/src/lower.rs
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* (Partially) fix handling of type params depending on type paramsFlorian Diebold2020-06-291-8/+35
| | | | | | | | 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.
* Shift bound variables correctly when using assoc type shorthandFlorian Diebold2020-06-191-0/+3
| | | | | Fixes #4885. Fixes #4800.
* Use correct substs for super trait assoc typesFlorian Diebold2020-06-191-11/+11
| | | | | | | | When referring to an associated type of a super trait, we used the substs of the subtrait. That led to the #4931 crash if the subtrait had less parameters, but it could also lead to other incorrectness if just the order was different. Fixes #4931.
* Fix type parameter defaultsFlorian Diebold2020-06-051-24/+46
| | | | | They should not be applied in expression or pattern contexts, unless there are other explicitly given type args.
* Review fixesFlorian Diebold2020-06-051-5/+4
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* Implement return position impl trait / opaque type supportFlorian Diebold2020-06-051-21/+122
| | | | | | | | | | | | | 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.
* Switch to new magic marksAleksey Kladov2020-05-201-1/+1
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* Rename to associated_type_shorthand_candidatesJonas Schievink2020-04-291-25/+26
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* Complete assoc. items on type parametersJonas Schievink2020-04-291-56/+88
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* For associated type shorthand (T::Item), use the substs from the where clauseFlorian Diebold2020-04-261-13/+29
| | | | | So e.g. if we have `fn foo<T: SomeTrait<u32>>() -> T::Item`, we want to lower that to `<T as SomeTrait<u32>>::Item` and not `<T as SomeTrait<_>>::Item`.
* Rename StructField -> FieldAleksey Kladov2020-04-251-3/+3
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* Fix another crash from wrong bindersFlorian Diebold2020-04-171-20/+49
| | | | | | | Basically, if we had something like `dyn Trait<T>` (where `T` is a type parameter) in an impl we lowered that to `dyn Trait<^0.0>`, when it should be `dyn Trait<^1.0>` because the `dyn` introduces a new binder. With one type parameter, that's just wrong, with two, it'll lead to crashes.
*-. Merge #3964 #3965 #3967bors[bot]2020-04-151-8/+34
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 3964: Nicer Chalk debug logs r=matklad a=flodiebold I'm looking at a lot of Chalk debug logs at the moment, so here's a few changes to make them slightly nicer... 3965: Implement inline associated type bounds r=matklad a=flodiebold Like `Iterator<Item: SomeTrait>`. This is an unstable feature, but it's used in the standard library e.g. in the definition of Flatten, so we can't get away with not implementing it :) (This is cherry-picked from my recursive solver branch, where it works better, but I did manage to write a test that works with the current Chalk solver as well...) 3967: Handle `Self::Type` in trait definitions when referring to own associated type r=matklad a=flodiebold It was implemented for other generic parameters for the trait, but not for `Self`. (Last one off my recursive solver branch :smile: ) Co-authored-by: Florian Diebold <[email protected]>
| | * Handle `Self::Type` in trait definitions when referring to own associated typeFlorian Diebold2020-04-131-2/+12
| |/ |/| | | | | It was implemented for other generic parameters for the trait, but not for `Self`.
| * Implement inline associated type boundsFlorian Diebold2020-04-131-6/+22
|/ | | | | | | Like `Iterator<Item: SomeTrait>`. This is an unstable feature, but it's used in the standard library e.g. in the definition of Flatten, so we can't get away with not implementing it :)
* Upgrade Chalk againFlorian Diebold2020-04-051-13/+15
| | | | | | | The big change here is counting binders, not variables (https://github.com/rust-lang/chalk/pull/360). We have to adapt to the same scheme for our `Ty::Bound`. It's mostly fine though, even makes some things more clear.
* Use `dyn Trait` for working with databseAleksey Kladov2020-03-161-112/+108
| | | | | | | 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).
* Resolve `Self::AssocTy` in implsFlorian Diebold2020-03-061-36/+50
| | | | | | | | | | To do this we need to carry around the original resolution a bit, because `Self` gets resolved to the actual type immediately, but you're not allowed to write the equivalent type in a projection. (I tried just comparing the projection base type with the impl self type, but that seemed too dirty.) This is basically how rustc does it as well. Fixes #3249.
* Rework find_super_trait_path to protect against cyclesFlorian Diebold2020-02-221-1/+2
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* Fix wrong handling of bare `dyn Trait` exposed by canonicalizer fixFlorian Diebold2020-02-221-1/+3
| | | | | The self type in the `dyn Trait` trait ref should always be ^0, but we didn't put that in there in the bare case.
* Run cargo +nightly fix --clippy -Z unstable-optionsKirill Bulatov2020-02-181-12/+10
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* use 'if let' instead of match on kind in lower.rsadamrk2020-02-171-6/+4
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* replace uses of VariantData::is_unit with VariantData::kindadamrk2020-02-161-4/+7
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* Make Self implement the trait inside trait default methodsFlorian Diebold2020-02-141-4/+28
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* Rename Ty::Param => Ty::PlaceholderFlorian Diebold2020-02-141-4/+4
| | | | This aligns more with Chalk.
* Fix some TODOsFlorian Diebold2020-02-071-3/+7
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* Deal better with implicit type parameters and argument listsFlorian Diebold2020-02-071-20/+21
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* FormattingFlorian Diebold2020-02-071-2/+6
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* Fix compilation of other cratesFlorian Diebold2020-02-071-2/+2
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* Use variables in predicates as wellFlorian Diebold2020-02-071-32/+41
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* Comment fixes / todosFlorian Diebold2020-02-071-6/+5
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* Fix APIT some moreFlorian Diebold2020-02-071-3/+2
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* Fix APITFlorian Diebold2020-02-071-0/+2
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* Change Ty::Param to contain param IDFlorian Diebold2020-02-071-49/+59
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* WIP use params for APITFlorian Diebold2020-02-071-0/+10
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* Fix assoc type selectionFlorian Diebold2020-02-071-29/+40
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* First stab at desugaring bounds for APITFlorian Diebold2020-02-071-3/+26
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* Fix crashFlorian Diebold2020-02-071-4/+7
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* Fix enum constructorsFlorian Diebold2020-02-071-6/+4
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* Lower impl trait to variables, move away from using placeholders where they ↵Florian Diebold2020-02-071-122/+141
| | | | don't belong
* wip lower impl trait to type argsFlorian Diebold2020-02-071-0/+1
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* wip implement lowering modeFlorian Diebold2020-02-071-6/+26
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* Add impl trait lowering modeFlorian Diebold2020-02-071-18/+80
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* Introduce TyLoweringContextFlorian Diebold2020-02-071-122/+110
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* Fix #2705Florian Diebold2020-01-031-1/+1
| | | | | | | | The `-` turned into a `+` during a refactoring. The original issue was caused by `Read` resolving wrongly to a trait without type parameters instead of a struct with one parameter; this only fixes the crash, not the wrong resolution.
* Support for nested ADTAleksey Kladov2019-12-201-2/+2
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* Forbid <T>::foo syntax in mod pathsAleksey Kladov2019-12-181-3/+3
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* Use different types for path with and without genericsAleksey Kladov2019-12-141-36/+34
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* Move enum&union to new locAleksey Kladov2019-12-121-4/+5
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* Move structs to new locAleksey Kladov2019-12-121-1/+1
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