872ce47955
here. Some of this may have been poorly rebased, though I tried to be careful and preserve the spirit of the test.
39 lines
1.1 KiB
Rust
39 lines
1.1 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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// Issue #3902. We are (at least currently) unable to infer `Self`
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// based on `T`, even though there is only a single impl, because of
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// the possibility of associated types and other things (basically: no
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// constraints on `Self` here at all).
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mod base {
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pub trait HasNew<T> {
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fn new() -> T;
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fn dummy(&self) { }
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}
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pub struct Foo {
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dummy: (),
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}
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impl HasNew<Foo> for Foo {
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fn new() -> Foo {
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Foo { dummy: () }
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}
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}
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}
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pub fn foo() {
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let _f: base::Foo = base::HasNew::new();
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//~^ ERROR type annotations required
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}
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fn main() { }
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