27 lines
464 B
Rust
27 lines
464 B
Rust
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// Test that `rustc_specialization_trait` requires always applicable impls.
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#![feature(min_specialization)]
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#![feature(rustc_attrs)]
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#[rustc_specialization_trait]
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trait SpecMarker {
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fn f();
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}
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impl SpecMarker for &'static u8 {
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//~^ ERROR cannot specialize
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fn f() {}
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}
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impl<T> SpecMarker for (T, T) {
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//~^ ERROR specializing impl
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fn f() {}
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}
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impl<T: Clone> SpecMarker for [T] {
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//~^ ERROR cannot specialize
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fn f() {}
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}
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fn main() {}
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