39 lines
1.0 KiB
Rust
39 lines
1.0 KiB
Rust
// Copyright 2017 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 that we give a note when the old LUB/GLB algorithm would have
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// succeeded but the new code (which is stricter) gives an error.
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trait Foo<T, U> { }
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fn foo(
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x: &for<'a, 'b> Foo<&'a u8, &'b u8>,
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y: &for<'a> Foo<&'a u8, &'a u8>,
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) {
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let z = match 22 { //~ ERROR incompatible types
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0 => x,
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_ => y,
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};
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}
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fn bar(
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x: &for<'a, 'b> Foo<&'a u8, &'b u8>,
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y: &for<'a> Foo<&'a u8, &'a u8>,
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) {
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// Accepted with explicit case:
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let z = match 22 {
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0 => x as &for<'a> Foo<&'a u8, &'a u8>,
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_ => y,
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};
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}
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fn main() {
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}
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