src/test/ui/issue-47706-trait.rs


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// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

trait T {
    fn f(&self, _: ()) {
        None::<()>.map(Self::f);
    }
    //~^^ ERROR function is expected to take a single 0-tuple as argument
}

fn main() {}