872ce47955
here. Some of this may have been poorly rebased, though I tried to be careful and preserve the spirit of the test.
47 lines
1.5 KiB
Rust
47 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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// 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(unboxed_closures)]
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#![allow(dead_code)]
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use std::marker;
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trait Foo<'a,T> {
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type Output;
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fn dummy(&'a self) -> &'a (T,Self::Output);
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}
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trait Eq<X: ?Sized> { fn is_of_eq_type(&self, x: &X) -> bool { true } }
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impl<X: ?Sized> Eq<X> for X { }
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fn eq<A: ?Sized,B: ?Sized +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<(isize,),Output=()>, Foo(isize) >();
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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, (isize,),Output=()>, Foo(isize) >();
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}
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fn test2(x: &Foo<(isize,),Output=()>, y: &Foo(isize)) {
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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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//~^ ERROR cannot infer
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}
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fn main() { }
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