src/test/run-pass/trait-where-clause-vs-impl.rs

// Copyright 2014 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.

// Test that when there is a conditional (but blanket) impl and a
// where clause, we don't get confused in trait resolution.
//
// Issue #18453.

// pretty-expanded FIXME #23616

use std::rc::Rc;

pub trait Foo<M> {
    fn foo(&mut self, msg: M);
}

pub trait Bar<M> {
    fn dummy(&self) -> M;
}

impl<M, F: Bar<M>> Foo<M> for F {
    fn foo(&mut self, msg: M) {
    }
}

pub struct Both<M, F> {
    inner: Rc<(M, F)>,
}

impl<M, F: Foo<M>> Clone for Both<M, F> {
    fn clone(&self) -> Both<M, F> {
        Both { inner: self.inner.clone() }
    }
}

fn repro1<M, F: Foo<M>>(_both: Both<M, F>) {
}

fn repro2<M, F: Foo<M>>(msg: M, foo: F) {
    let both = Both { inner: Rc::new((msg, foo)) };
    repro1(both.clone()); // <--- This clone causes problem
}

pub fn main() {
}