37 lines
736 B
Rust
37 lines
736 B
Rust
#![allow(const_err)] // don't warn about truncating casts
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enum Foo {
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Bar = 42,
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Baz,
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Quux = 100,
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}
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enum Signed {
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Bar = -42,
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Baz,
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Quux = 100,
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}
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fn foo() -> [u8; 3] {
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let baz = Foo::Baz; // let-expansion changes the MIR significantly
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[Foo::Bar as u8, baz as u8, Foo::Quux as u8]
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}
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fn signed() -> [i8; 3] {
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let baz = Signed::Baz; // let-expansion changes the MIR significantly
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[Signed::Bar as i8, baz as i8, Signed::Quux as i8]
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}
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fn unsafe_match() -> bool {
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match unsafe { std::mem::transmute::<u8, Foo>(43) } {
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Foo::Baz => true,
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_ => false,
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}
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}
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fn main() {
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assert_eq!(foo(), [42, 43, 100]);
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assert_eq!(signed(), [-42, -41, 100]);
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assert!(unsafe_match());
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}
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