src/test/ui/rfc-2294-if-let-guard/run-pass.rs

   1 // run-pass
   2
   3 #![feature(if_let_guard)]
   4
   5 enum Foo {
   6     Bar,
   7     Baz,
   8     Qux(u8),
   9 }
  10
  11 fn bar(x: bool) -> Foo {
  12     if x { Foo::Baz } else { Foo::Bar }
  13 }
  14
  15 fn baz(x: u8) -> Foo {
  16     if x % 2 == 0 { Foo::Bar } else { Foo::Baz }
  17 }
  18
  19 fn qux(x: u8) -> Foo {
  20     Foo::Qux(x.rotate_left(1))
  21 }
  22
  23 fn main() {
  24     match Some((true, 3)) {
  25         Some((x, _)) if let Foo::Bar = bar(x) => panic!(),
  26         Some((_, x)) if let Foo::Baz = baz(x) => {},
  27         _ => panic!(),
  28     }
  29     match Some(42) {
  30         Some(x) if let Foo::Qux(y) = qux(x) => assert_eq!(y, 84),
  31         _ => panic!(),
  32     }
  33 }