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