File: capture-lifetime-not-in-hir.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 (21 lines) | stat: -rw-r--r-- 500 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
 
#![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() {}