rust/src/test/compile-fail/variance-use-contravariant-struct-2.rs
2015-02-18 17:31:42 -05:00

28 lines
850 B
Rust

// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Test various uses of structs with distint variances to make sure
// they permit lifetimes to be approximated as expected.
#![allow(dead_code)]
#![feature(rustc_attrs)]
struct SomeStruct<T>(fn(T));
fn bar<'min,'max>(v: SomeStruct<&'min ()>)
-> SomeStruct<&'max ()>
where 'max : 'min
{
v
}
#[rustc_error]
fn main() { } //~ ERROR compilation successful