src/test/ui/nll/lub-match.rs

   1 // Test that we correctly consider the type of `match` to be the LUB
   2 // of the various arms, particularly in the case where regions are
   3 // involved.
   4
   5 pub fn opt_str0<'a>(maybestr: &'a Option<String>) -> &'a str {
   6     match *maybestr {
   7         Some(ref s) => {
   8             let s: &'a str = s;
   9             s
  10         }
  11         None => "(none)",
  12     }
  13 }
  14
  15 pub fn opt_str1<'a>(maybestr: &'a Option<String>) -> &'a str {
  16     match *maybestr {
  17         None => "(none)",
  18         Some(ref s) => {
  19             let s: &'a str = s;
  20             s
  21         }
  22     }
  23 }
  24
  25 pub fn opt_str2<'a>(maybestr: &'a Option<String>) -> &'static str {
  26     match *maybestr {
  27         None => "(none)",
  28         Some(ref s) => {
  29             let s: &'a str = s;
  30             s
  31             //~^ ERROR lifetime may not live long enough
  32         }
  33     }
  34 }
  35
  36 pub fn opt_str3<'a>(maybestr: &'a Option<String>) -> &'static str {
  37     match *maybestr {
  38         Some(ref s) => {
  39             let s: &'a str = s;
  40             s
  41             //~^ ERROR lifetime may not live long enough
  42         }
  43         None => "(none)",
  44     }
  45 }
  46
  47 fn main() {}