Handle bindings in substructure of patterns with type ascriptions#55274

Merged

bors merged 12 commits intorust-lang:masterfrom

pnkfelix:issue-54570-proj-path-into-pats-with-type-take-2

Oct 27, 2018

Commits on Oct 26, 2018

Remove `PlaceContext` from API of `mir::Visitor::visit_projection_elem`.
pnkfelix
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restrict scope of methods that are only called within mod tree of parent.
pnkfelix
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Refactoring: added `PatternTypeAnnotation` wrapper around `UserTypeAnnotation` to ease future changes.
pnkfelix
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Added `mir::UserTypeProjection`, a stub for a structure that projects *into* a given UserTypeAnnotation.
pnkfelix
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Checkpoint: Added abstraction over collection of projections into user type.
pnkfelix
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Add the actual chain of projections to `UserTypeProjection`.
pnkfelix
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Update mir-opt tests to reflect change to `AscribeUserType` to carry a `UserTypeProjection`.
pnkfelix
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regression test for ICE I encountered in my patch.
pnkfelix
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Add test for normalization during field-lookup on patterns with ascribed types.
pnkfelix
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Add intern table for `List<ProjectionElem<'tcx, (), ()>>`.
pnkfelix
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Further foundational stuff on `ProjectionKind` before I add it to `AscribeUserType`.
pnkfelix
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add user_ty.projs support to `AscribeUserType`.
pnkfelix
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