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9c3064e131
Retire hir::*ItemRef. This information was kept for various places that iterate on HIR to know about trait-items and impl-items. This PR replaces them by uses of the `associated_items` query that contain pretty much the same information. This shortens many spans to just `def_span`, which can be easier to read.
This directory contains the test for incorrect usage of specialization that should lead to compile failure. Those tests break down into a few categories:
-
Feature gating
-
Overlap checking with specialization enabled
- Basic overlap scenarios
- Includes purely structural overlap
- Includes purely trait-based overlap
- Includes mix
- Overlap with differing polarity
- Basic overlap scenarios
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Attempt to rely on projection of a
defaulttype