rust/tests/ui/specialization/README.md
2023-01-11 09:32:08 +00:00

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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
- [On use of the `default` keyword](specialization-feature-gate-default.rs)
- [On overlapping impls](specialization-feature-gate-overlap.rs)
- Overlap checking with specialization enabled
- [Basic overlap scenarios](specialization-overlap.rs)
- Includes purely structural overlap
- Includes purely trait-based overlap
- Includes mix
- [Overlap with differing polarity](specialization-overlap-negative.rs)
- [Attempt to specialize without using `default`](specialization-no-default.rs)
- [Attempt to change impl polarity in a specialization](specialization-polarity.rs)
- Attempt to rely on projection of a `default` type
- [Rely on it externally in both generic and monomorphic contexts](specialization-default-projection.rs)
- [Rely on it both within an impl and outside it](specialization-default-types.rs)