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