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

   1 // run-pass
   2
   3 #![feature(if_let_guard)]
   4 #![allow(incomplete_features)]
   5
   6 enum Foo {
   7     Bar,
   8     Baz,
   9     Qux(u8),
  10 }
  11
  12 fn bar(x: bool) -> Foo {
  13     if x { Foo::Baz } else { Foo::Bar }
  14 }
  15
  16 fn baz(x: u8) -> Foo {
  17     if x % 2 == 0 { Foo::Bar } else { Foo::Baz }
  18 }
  19
  20 fn qux(x: u8) -> Foo {
  21     Foo::Qux(x.rotate_left(1))
  22 }
  23
  24 fn main() {
  25     match Some((true, 3)) {
  26         Some((x, _)) if let Foo::Bar = bar(x) => panic!(),
  27         Some((_, x)) if let Foo::Baz = baz(x) => {},
  28         _ => panic!(),
  29     }
  30     match Some(42) {
  31         Some(x) if let Foo::Qux(y) = qux(x) => assert_eq!(y, 84),
  32         _ => panic!(),
  33     }
  34 }