src/test/run-pass/issues/issue-21400.rs

   1 // run-pass
   2 // Regression test for #21400 which itself was extracted from
   3 // stackoverflow.com/questions/28031155/is-my-borrow-checker-drunk/28031580
   4
   5 fn main() {
   6     let mut t = Test;
   7     assert_eq!(t.method1("one"), Ok(1));
   8     assert_eq!(t.method2("two"), Ok(2));
   9     assert_eq!(t.test(), Ok(2));
  10 }
  11
  12 struct Test;
  13
  14 impl Test {
  15     fn method1(&mut self, _arg: &str) -> Result<usize, &str> {
  16         Ok(1)
  17     }
  18
  19     fn method2(self: &mut Test, _arg: &str) -> Result<usize, &str> {
  20         Ok(2)
  21     }
  22
  23     fn test(self: &mut Test) -> Result<usize, &str> {
  24         let s = format!("abcde");
  25         // (Originally, this invocation of method2 was saying that `s`
  26         // does not live long enough.)
  27         let data = match self.method2(&*s) {
  28             Ok(r) => r,
  29             Err(e) => return Err(e)
  30         };
  31         Ok(data)
  32     }
  33 }
  34
  35 // Below is a closer match for the original test that was failing to compile
  36
  37 pub struct GitConnect;
  38
  39 impl GitConnect {
  40     fn command(self: &mut GitConnect, _s: &str) -> Result<Vec<Vec<u8>>, &str> {
  41         unimplemented!()
  42     }
  43
  44     pub fn git_upload_pack(self: &mut GitConnect) -> Result<String, &str> {
  45         let c = format!("git-upload-pack");
  46
  47         let mut out = String::new();
  48         let data = self.command(&c)?;
  49
  50         for line in data.iter() {
  51             out.push_str(&format!("{:?}", line));
  52         }
  53
  54         Ok(out)
  55     }
  56 }