36 lines
764 B
Rust
36 lines
764 B
Rust
// We need to opt into the `never_type_fallback` feature
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// to trigger the requirement that this is testing.
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#![feature(never_type, never_type_fallback)]
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#![allow(unused)]
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trait Deserialize: Sized {
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fn deserialize() -> Result<Self, String>;
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}
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impl Deserialize for () {
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fn deserialize() -> Result<(), String> {
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Ok(())
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}
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}
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trait ImplementedForUnitButNotNever {}
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impl ImplementedForUnitButNotNever for () {}
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fn foo<T: ImplementedForUnitButNotNever>(_t: T) {}
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//~^ NOTE required by this bound in `foo`
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//~| NOTE
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fn smeg() {
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let _x = return;
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foo(_x);
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//~^ ERROR the trait bound
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//~| NOTE the trait `ImplementedForUnitButNotNever` is not implemented
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//~| NOTE the trait is implemented for `()`
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}
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fn main() {
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smeg();
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}
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