File: where-clause-vs-impl.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (44 lines) | stat: -rw-r--r-- 807 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
//@ run-pass
#![allow(dead_code)]
#![allow(unused_variables)]
// Test that when there is a conditional (but blanket) impl and a
// where clause, we don't get confused in trait resolution.
//
// Issue #18453.


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() {
}