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* Specify desirable namespace when calling resolveAleksey Kladov2019-09-132-188/+176
| | | | That way, we are able to get rid of a number of unreachable statements
* rename AdtDef -> AdtAleksey Kladov2019-09-122-20/+18
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* generalize impl_froms to nested enumsAleksey Kladov2019-09-121-19/+9
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* make various enums "inherit" from AdtDefAleksey Kladov2019-09-122-32/+32
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* start cleaning up the resolutionAleksey Kladov2019-09-122-36/+12
| | | | | | | Nameres related types, like `PerNs<Resolution>`, can represent unreasonable situations, like a local in a type namespace. We should clean this up, by requiring that call-site specifies the kind of resolution it expects.
* Infer box expressionuHOOCCOOHu2019-09-112-0/+57
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* Fix typouHOOCCOOHu2019-09-111-1/+1
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* Merge #1795bors[bot]2019-09-091-0/+58
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1795: Make macro scope a real name scope and fix some details r=matklad a=uHOOCCOOHu This PR make macro's module scope a real name scope in `PerNs`, instead of handling `Either<PerNs, MacroDef>` everywhere. In `rustc`, the macro scope behave exactly the same as type and value scope. It is valid that macros, types and values having exact the same name, and a `use` statement will import all of them. This happened to module `alloc::vec` and macro `alloc::vec!`. So `Either` is not suitable here. There is a trap that not only does `#[macro_use]` import all `#[macro_export] macro_rules`, but also imports all macros `use`d in the crate root. In other words, it just _imports all macros in the module scope of crate root_. (Visibility of `use` doesn't matter.) And it also happened to `libstd` which has `use alloc_crate::vec;` in crate root to re-export `alloc::vec`, which it both a module and a macro. The current implementation of `#[macro_use] extern crate` doesn't work here, so that is why only macros directly from `libstd` like `dbg!` work, while `vec!` from `liballoc` doesn't. This PR fixes this. Another point is that, after some tests, I figure out that _`macro_rules` does NOT define macro in current module scope at all_. It defines itself in legacy textual scope. And if `#[macro_export]` is given, it also is defined ONLY in module scope of crate root. (Then being `macro_use`d, as mentioned above) (Well, the nightly [Declarative Macro 2.0](https://github.com/rust-lang/rust/issues/39412) simply always define in current module scope only, just like normal items do. But it is not yet supported by us) After this PR, in my test, all non-builtin macros are resolved now. (Hover text for documentation is available) So it fixes #1688 . Since compiler builtin macros are marked as `#[rustc_doc_only_macro]` instead of `#[macro_export]`, we can simply tweak the condition to let it resolved, but it may cause expansion error. Some critical notes are also given in doc-comments. <img width="447" alt="Screenshot_20190909_223859" src="https://user-images.githubusercontent.com/14816024/64540366-ac1ef600-d352-11e9-804f-566ba7559206.png"> Co-authored-by: uHOOCCOOHu <[email protected]>
| * StripuHOOCCOOHu2019-09-091-3/+0
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| * Make macro scope a real name scopeuHOOCCOOHu2019-09-092-0/+61
| | | | | | | | Fix some details about module scoping
* | modify testsNiko Matsakis2019-09-091-6/+6
| | | | | | | | | | | | | | | | Some method resolution tests now yield `{unknown}` where they did not before. Other tests now succeed, likely because this is helping the solver steer its efforts.
* | also make "unknown" case non-enumerableNiko Matsakis2019-09-091-1/+1
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* | make all traits non-enumerableNiko Matsakis2019-09-091-9/+1
|/ | | | | As discussed on Zulip, this actually matches the present behavior of rustc.
* Rename `textual_macro` -> `legacy_macro`uHOOCCOOHu2019-09-081-1/+1
| | | | Add comments
* Resolve textual scoped macros inside itemuHOOCCOOHu2019-09-081-0/+35
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* cleanup hir db importsAleksey Kladov2019-09-084-7/+11
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* Fix crash for super trait cyclesFlorian Diebold2019-09-071-0/+21
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* Fix Chalk environmentsFlorian Diebold2019-09-072-3/+4
| | | | | The clauses need to be wrapped in `FromEnv` clauses for elaboration (i.e. things like inferring `T: Clone` from `T: Copy`) to work correctly.
* Use traits from where clauses for method resolutionFlorian Diebold2019-09-073-12/+32
| | | | | E.g. if we have `T: some::Trait`, we can call methods from that trait without it needing to be in scope.
* Lower `Fn(X, Y) -> Z` pathsFlorian Diebold2019-09-071-8/+8
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* Lower bounds on trait definition, and resolve assoc types from super traitsFlorian Diebold2019-09-075-23/+26
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* Add some more testsFlorian Diebold2019-09-071-0/+205
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* Make type walking infrastructure a bit nicerFlorian Diebold2019-09-036-19/+9
| | | | | If/when we switch to using Chalk's Ty, we'll need to replace this by its `Fold` trait, but I didn't want to import the whole thing just yet.
* Properly format `impl Trait<Type = Foo>` typesFlorian Diebold2019-09-031-4/+4
| | | | | | It's a bit complicated because we basically have to 'undo' the desugaring, and the result is very dependent on the specifics of the desugaring and will probably produce weird results otherwise.
* Add support for associated type bindings (`where Trait<Type = X>`)Florian Diebold2019-09-034-46/+135
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* Add test for assoc type bindingsFlorian Diebold2019-09-031-0/+65
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* Correctly build BodySourceMap for macro-expanded expressionsAleksey Kladov2019-09-031-8/+25
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* clearer ignoreAleksey Kladov2019-09-031-1/+1
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* remove needless refsAleksey Kladov2019-09-031-2/+2
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* use recrod terminology for hir::PatAleksey Kladov2019-09-031-2/+2
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* fix hir for new block syntaxAleksey Kladov2019-09-021-1/+1
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* Add an expr_source method analogous to the source methods in the code modelFlorian Diebold2019-09-021-2/+2
| | | | ... and use that instead of exposing the source map.
* :arrow_up: instaAleksey Kladov2019-08-291-1167/+1265
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* Small fixesKirill Bulatov2019-08-261-12/+9
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* Remove redundant testsKirill Bulatov2019-08-261-63/+5
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* Make infer_block not unify; add back calculate_least_upper_boundFlorian Diebold2019-08-262-30/+66
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* An attempt to add the coercion logic for NeverKirill Bulatov2019-08-262-51/+98
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* Properly coerce never typesKirill Bulatov2019-08-262-51/+46
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* Remove extra inference testKirill Bulatov2019-08-262-25/+0
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* Fix never in if expressionsKirill Bulatov2019-08-262-4/+51
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* Add test marksKirill Bulatov2019-08-262-1/+11
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* Fix match type inference for Never match armsKirill Bulatov2019-08-262-6/+32
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* TestsKirill Bulatov2019-08-261-0/+104
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* Add type_mismatches to InferenceResult and use this in ok-wrapping code fixPhil Ellison2019-08-251-1/+18
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* rename struct -> record, pos -> tupleAleksey Kladov2019-08-231-6/+6
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* Improve/fix type bound loweringFlorian Diebold2019-08-221-0/+33
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* Handle impl/dyn Trait in method resolutionFlorian Diebold2019-08-222-32/+66
| | | | | | | | | | | | | When we have one of these, the `Trait` doesn't need to be in scope to call its methods. So we need to consider this when looking for method candidates. (Actually I think the same is true when we have a bound `T: some::Trait`, but we don't handle that yet). At the same time, since Chalk doesn't handle these types yet, add a small hack to skip Chalk in method resolution and just consider `impl Trait: Trait` always true. This is enough to e.g. get completions for `impl Trait`, but since we don't do any unification we won't infer the return type of e.g. `impl Into<i64>::into()`.
* Add `impl Trait` and `dyn Trait` typesFlorian Diebold2019-08-223-12/+177
| | | | | | | - refactor bounds handling in the AST a bit - add HIR for bounds - add `Ty::Dyn` and `Ty::Opaque` variants and lower `dyn Trait` / `impl Trait` syntax to them
* Don't add `?` bounds as real boundsAleksey Kladov2019-08-221-0/+29
| | | | closes #1709
* implement initial type inference for index expressionsAleksey Kladov2019-08-172-0/+20
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