30 lines
507 B
Rust
30 lines
507 B
Rust
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// Check that supertraits cannot be used to work around min_specialization
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// limitations.
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#![feature(min_specialization)]
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#![feature(rustc_attrs)]
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trait HasMethod {
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fn method(&self);
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}
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#[rustc_unsafe_specialization_marker]
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trait Marker: HasMethod {}
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trait Spec {
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fn spec_me(&self);
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}
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impl<T> Spec for T {
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default fn spec_me(&self) {}
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}
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impl<T: Marker> Spec for T {
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//~^ ERROR cannot specialize on trait `HasMethod`
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fn spec_me(&self) {
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self.method();
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}
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}
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fn main() {}
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