65 lines
1.5 KiB
Rust
65 lines
1.5 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![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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#[rustc_variance]
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trait Getter<T> { //~ ERROR [o, o]
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fn get(&self) -> T;
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}
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#[rustc_variance]
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trait Setter<T> { //~ ERROR [o, o]
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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 parameter `U` is never used
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Foo(T)
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}
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#[rustc_variance]
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trait TestTrait<U,T:Setter<U>> { //~ ERROR [o, o, o]
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fn getter(&self, u: U) -> T;
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}
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#[rustc_variance]
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trait TestTrait2<U> : Getter<U> { //~ ERROR [o, o]
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}
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#[rustc_variance]
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trait TestTrait3<U> { //~ ERROR [o, o]
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fn getter<T:Getter<U>>(&self);
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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 parameter `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 parameter `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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