mirror of https://github.com/rust-lang/rust
41 lines
1.1 KiB
Rust
41 lines
1.1 KiB
Rust
//@ run-pass
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#![allow(dead_code)]
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enum Enum {
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Foo { foo: usize },
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Bar { bar: usize }
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}
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fn fun1(e1: &Enum, e2: &Enum) -> usize {
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match (e1, e2) {
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(&Enum::Foo { foo: _ }, &Enum::Foo { foo: _ }) => 0,
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(&Enum::Foo { foo: _ }, &Enum::Bar { bar: _ }) => 1,
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(&Enum::Bar { bar: _ }, &Enum::Bar { bar: _ }) => 2,
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(&Enum::Bar { bar: _ }, &Enum::Foo { foo: _ }) => 3,
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}
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}
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fn fun2(e1: &Enum, e2: &Enum) -> usize {
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match (e1, e2) {
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(&Enum::Foo { foo: _ }, &Enum::Foo { foo: _ }) => 0,
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(&Enum::Foo { foo: _ }, _ ) => 1,
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(&Enum::Bar { bar: _ }, &Enum::Bar { bar: _ }) => 2,
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(&Enum::Bar { bar: _ }, _ ) => 3,
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}
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}
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pub fn main() {
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let foo = Enum::Foo { foo: 1 };
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let bar = Enum::Bar { bar: 1 };
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assert_eq!(fun1(&foo, &foo), 0);
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assert_eq!(fun1(&foo, &bar), 1);
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assert_eq!(fun1(&bar, &bar), 2);
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assert_eq!(fun1(&bar, &foo), 3);
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assert_eq!(fun2(&foo, &foo), 0);
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assert_eq!(fun2(&foo, &bar), 1); // fun2 returns 0
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assert_eq!(fun2(&bar, &bar), 2);
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assert_eq!(fun2(&bar, &foo), 3); // fun2 returns 2
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}
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