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//@ run-pass
#![feature(if_let_guard)]
enum Foo {
Bar,
Baz,
Qux(u8),
}
fn bar(x: bool) -> Foo {
if x { Foo::Baz } else { Foo::Bar }
}
fn baz(x: u8) -> Foo {
if x % 2 == 0 { Foo::Bar } else { Foo::Baz }
}
fn qux(x: u8) -> Foo {
Foo::Qux(x.rotate_left(1))
}
fn main() {
match Some((true, 3)) {
Some((x, _)) if let Foo::Bar = bar(x) => panic!(),
Some((_, x)) if let Foo::Baz = baz(x) => {},
_ => panic!(),
}
match Some(42) {
Some(x) if let Foo::Qux(y) = qux(x) => assert_eq!(y, 84),
_ => panic!(),
}
// issue #88015
#[allow(irrefutable_let_patterns)]
match () {
() | () if let x = 42 => assert_eq!(x, 42),
_ => panic!()
}
}
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