File: coherence-overlap-issue-23516.rs

package info (click to toggle)
rustc-web 1.78.0%2Bdfsg1-2~deb12u3
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,245,420 kB
  • sloc: xml: 147,985; javascript: 18,022; sh: 11,083; python: 10,265; ansic: 6,172; cpp: 5,023; asm: 4,390; makefile: 4,269
file content (14 lines) | stat: -rw-r--r-- 439 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
//@ revisions: old next
//@[next] compile-flags: -Znext-solver

// Tests that we consider `Box<U>: !Sugar` to be ambiguous, even
// though we see no impl of `Sugar` for `Box`. Therefore, an overlap
// error is reported for the following pair of impls (#23516).

pub trait Sugar { fn dummy(&self) { } }
pub trait Sweet { fn dummy(&self) { } }
impl<T:Sugar> Sweet for T { }
impl<U:Sugar> Sweet for Box<U> { }
//~^ ERROR E0119

fn main() { }