mirror of https://github.com/rust-lang/rust
50 lines
1021 B
Rust
50 lines
1021 B
Rust
union Foo {
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bar: i8,
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zst: (),
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pizza: Pizza,
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}
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#[derive(Clone, Copy)]
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struct Pizza {
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topping: Option<PizzaTopping>
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}
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#[allow(dead_code)]
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#[derive(Clone, Copy)]
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enum PizzaTopping {
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Cheese,
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Pineapple,
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}
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fn do_nothing(_x: &mut Foo) {}
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pub fn main() {
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let mut foo = Foo { bar: 5 };
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do_nothing(&mut foo);
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// This is UB, so this test isn't run
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match foo {
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Foo { bar: _a } => {}, //~ ERROR access to union field is unsafe
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}
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match foo {
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Foo {
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pizza: Pizza { //~ ERROR access to union field is unsafe
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topping: Some(PizzaTopping::Cheese) | Some(PizzaTopping::Pineapple) | None
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}
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} => {},
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}
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match foo {
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Foo { zst: () } => {} //~ ERROR access to union field is unsafe
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}
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match foo {
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Foo { pizza: Pizza { .. } } => {} //~ ERROR access to union field is unsafe
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}
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// binding to wildcard is okay
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match foo {
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Foo { bar: _ } => {},
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}
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let Foo { bar: _ } = foo;
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}
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