45 lines
1.4 KiB
Rust
45 lines
1.4 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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// Test interaction between unboxed closure sugar and region
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// parameters (should be exactly as if angle brackets were used
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// and regions omitted).
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#![feature(default_type_params, unboxed_closures)]
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#![allow(dead_code)]
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use std::kinds::marker;
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trait Foo<'a,T,U> {
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fn dummy(&'a self) -> &'a (T,U);
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}
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trait Eq<Sized? X> for Sized? { }
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impl<Sized? X> Eq<X> for X { }
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fn eq<Sized? A,Sized? B:Eq<A>>() { }
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fn same_type<A,B:Eq<A>>(a: A, b: B) { }
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fn test<'a,'b>() {
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// Parens are equivalent to omitting default in angle.
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eq::< Foo<(int,),()>, Foo(int) >();
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// Here we specify 'static explicitly in angle-bracket version.
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// Parenthesized winds up getting inferred.
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eq::< Foo<'static, (int,),()>, Foo(int) >();
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}
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fn test2(x: &Foo<(int,),()>, y: &Foo(int)) {
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// Here, the omitted lifetimes are expanded to distinct things.
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same_type(x, y) //~ ERROR cannot infer
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}
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fn main() { }
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