mirror of https://github.com/rust-lang/rust
39 lines
694 B
Rust
39 lines
694 B
Rust
#![allow(dead_code)]
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#![feature(rustc_attrs)]
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// Check that bounds on type parameters (other than `Self`) do not
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// influence variance.
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trait Getter<T> {
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fn get(&self) -> T;
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}
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trait Setter<T> {
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fn get(&self, _: T);
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}
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#[rustc_variance]
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struct TestStruct<U,T:Setter<U>> { //~ ERROR [+, +]
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t: T, u: U
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}
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#[rustc_variance]
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enum TestEnum<U,T:Setter<U>> { //~ ERROR [*, +]
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//~^ ERROR: `U` is never used
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Foo(T)
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}
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#[rustc_variance]
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struct TestContraStruct<U,T:Setter<U>> { //~ ERROR [*, +]
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//~^ ERROR: `U` is never used
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t: T
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}
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#[rustc_variance]
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struct TestBox<U,T:Getter<U>+Setter<U>> { //~ ERROR [*, +]
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//~^ ERROR: `U` is never used
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t: T
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}
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pub fn main() { }
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