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This decouples callers from knowing what the default binding mode of
pattern matching is.
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Implement `BindingMode` for pattern matching, so that types can be
correctly inferred using match ergonomics. The binding mode defaults to
`Move` (referred to as 'BindingMode::BindByValue` in rustc), and is
updated by automatic dereferencing of the value being matched.
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This fixes #943
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Since the latter could actually be a real type...
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None of them works correctly yet, of course.
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915: Bring BodySyntaxMapping in line with other source-map instances r=flodiebold a=matklad
* rename to SourceMap
* don't store the actual body inline, just return a pair
r? @flodiebold
Co-authored-by: Aleksey Kladov <[email protected]>
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This replaces places where we would use node + node.type_ref() with things that
have an ascribed type, with using the TypeAscriptionOwner as the trait bound so
we can simply pass the node.
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897: Add basic const/static type inference r=flodiebold a=vipentti
This adds basic const/static type inference discussed in #887.
Currently the inference does not work for const/static declared inside a block. In addition the inference does not work inside the bodies of const/static.
Co-authored-by: Ville Penttinen <[email protected]>
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This module should remove completion rendering boilerplate from the
"brains" of completion engine.
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It was just getting too big. We now have:
- ty: the `Ty` enum and helpers
- ty::infer: actual type inference
- ty::lower: lowering from HIR to `Ty`
- ty::op: helpers for binary operations, currently
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I think it'll be better to make the path resolution the number of unresolved
segments, not the first unresolved index; then this error could simply not have
happened. But I'll do that separately.
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866: Implement basic support for Associated Methods r=flodiebold a=vipentti
This is my attempt at learning to understand how the type inference works by adding basic support for associated methods. Currently it does not resolve associated types or constants.
The basic idea is that `Resolver::resolve_path` returns a new `PathResult` type, which has two variants, `FullyResolved` and `PartiallyResolved`, fully resolved matches the previous behavior, where as `PartiallyResolved` contains the `PerNs<Resolution` in addition to a `segment_index` which contains the index of the segment which we failed to resolve. This index can then be used to continue inference in `infer_path_expr` using the `Type` we managed to resolve.
This changes some of the previous apis, so looking for feedback and suggestions.
This should enable fixing #832
Co-authored-by: Ville Penttinen <[email protected]>
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This also adds new pub(crate) resolve_path_segments which returns the
PathResult, which may or may not be fully resolved. PathResult is also now
pub(crate) since it is an implementation detail.
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This is done in `infer_path_expr`. When `Resolver::resolve_path` returns
`PartiallyResolved`, we use the returned `Resolution` together with the given
`segment_index` to check if we can find something matching the segment at
segment_index in the impls for that particular type.
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Also make them display a tiny bit nicer.
Fixes #860.
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we need to significantly reengineer macros, so the tests as they exist
are useless
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852: Handle != r=flodiebold a=matklad
r? @flodiebold
Co-authored-by: Aleksey Kladov <[email protected]>
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