58 lines
1.7 KiB
Rust
58 lines
1.7 KiB
Rust
// Copyright 2012 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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fn of<T>() -> @fn(T) { fail!(); }
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fn subtype<T>(x: @fn(T)) { fail!(); }
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fn test_fn<T>(_x: &'x T, _y: &'y T, _z: &'z T) {
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// Here, x, y, and z are free. Other letters
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// are bound. Note that the arrangement
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// subtype::<T1>(of::<T2>()) will typecheck
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// iff T1 <: T2.
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subtype::<&fn(&'a T)>(
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of::<&fn(&'a T)>());
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subtype::<&fn(&'a T)>(
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of::<&fn(&'b T)>());
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subtype::<&fn(&'b T)>(
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of::<&fn(&'x T)>());
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subtype::<&fn(&'x T)>(
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of::<&fn(&'b T)>()); //~ ERROR mismatched types
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subtype::<&fn(&'a T, &'b T)>(
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of::<&fn(&'a T, &'a T)>());
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subtype::<&fn(&'a T, &'a T)>(
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of::<&fn(&'a T, &'b T)>()); //~ ERROR mismatched types
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subtype::<&fn(&'a T, &'b T)>(
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of::<&fn(&'x T, &'y T)>());
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subtype::<&fn(&'x T, &'y T)>(
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of::<&fn(&'a T, &'b T)>()); //~ ERROR mismatched types
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subtype::<&fn(&'x T) -> @fn(&'a T)>(
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of::<&fn(&'x T) -> @fn(&'a T)>());
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subtype::<&fn(&'a T) -> @fn(&'a T)>(
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of::<&fn(&'a T) -> @fn(&'b T)>()); //~ ERROR mismatched types
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subtype::<&fn(&'a T) -> @fn(&'a T)>(
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of::<&fn(&'x T) -> @fn(&'b T)>()); //~ ERROR mismatched types
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subtype::<&fn(&'a T) -> @fn(&'b T)>(
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of::<&fn(&'a T) -> @fn(&'a T)>());
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}
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fn main() {}
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