File: capture-lifetime-not-in-hir.rs

package info (click to toggle)
rustc 1.88.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 934,128 kB
  • sloc: xml: 158,127; python: 36,062; javascript: 19,855; sh: 19,700; cpp: 18,947; ansic: 12,993; asm: 4,792; makefile: 690; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (21 lines) | stat: -rw-r--r-- 500 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
#![feature(rustc_attrs)]
#![rustc_variance_of_opaques]

trait Bar<'a> {
    type Assoc: From<()>;
}

fn foo<'a, T: Bar<'a>>() -> impl Into<T::Assoc> {
    //~^ ERROR ['a: o, T: o]
    // captures both T and 'a invariantly
    ()
}

fn foo2<'a, T: Bar<'a>>() -> impl Into<T::Assoc> + 'a {
    //~^ ERROR ['a: o, T: o, 'a: o]
    // captures both T and 'a invariantly, and also duplicates `'a`
    // i.e. the opaque looks like `impl Into<<T as Bar<'a>>::Assoc> + 'a_duplicated`
    ()
}

fn main() {}