48 lines
1.0 KiB
Rust
48 lines
1.0 KiB
Rust
// run-pass
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// Test copy
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struct A { a: i32, b: i32 }
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struct B { a: i32, b: C }
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struct D { a: i32, d: C }
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#[derive(Copy,Clone)]
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struct C { c: i32 }
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pub fn main() {
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match (A {a: 10, b: 20}) {
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x@A {a, b: 20} => { assert!(x.a == 10); assert!(a == 10); }
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A {b: _b, ..} => { panic!(); }
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}
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let mut x@B {b, ..} = B {a: 10, b: C {c: 20}};
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assert_eq!(x.a, 10);
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x.b.c = 30;
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assert_eq!(b.c, 20);
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let mut y@D {d, ..} = D {a: 10, d: C {c: 20}};
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assert_eq!(y.a, 10);
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y.d.c = 30;
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assert_eq!(d.c, 20);
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let some_b = Some(B { a: 10, b: C { c: 20 } });
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// in irrefutable pattern
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if let Some(x @ B { b, .. }) = some_b {
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assert_eq!(x.b.c, 20);
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assert_eq!(b.c, 20);
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} else {
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unreachable!();
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}
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let some_b = Some(B { a: 10, b: C { c: 20 } });
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if let Some(x @ B { b: mut b @ C { c }, .. }) = some_b {
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assert_eq!(x.b.c, 20);
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assert_eq!(b.c, 20);
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b.c = 30;
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assert_eq!(b.c, 30);
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assert_eq!(c, 20);
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} else {
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unreachable!();
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}
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}
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