File: cannot-infer-closure-circular.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 (13 lines) | stat: -rw-r--r-- 501 bytes parent folder | download | duplicates (14) 
1
2
3
4
5
6
7
8
9
10
11
12
13
 
fn main() {
    // Below we call the closure with its own return as the argument, unifying
    // its inferred input and return types. We want to make sure that the generated
    // error handles this gracefully, and in particular doesn't generate an extra
    // note about the `?` operator in the closure body, which isn't relevant to
    // the inference.
    let x = |r| { //~ ERROR type annotations needed for `Result<(), _>`
        let v = r?;
        Ok(v)
    };

    let _ = x(x(Ok(())));
}