blob: 06b3157a77a84c4a463e15a478cbed71d7331fbe (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
// this will get a no-op Clone impl
#[derive(Copy, Clone)]
struct A {
a: i32,
b: i64
}
// this will get a deep Clone impl
#[derive(Copy, Clone)]
struct B<T> {
a: i32,
b: T
}
struct C; // not Copy or Clone
#[derive(Clone)] struct D; // Clone but not Copy
fn is_copy<T: Copy>(_: T) {}
fn is_clone<T: Clone>(_: T) {}
fn main() {
// A can be copied and cloned
is_copy(A { a: 1, b: 2 });
is_clone(A { a: 1, b: 2 });
// B<i32> can be copied and cloned
is_copy(B { a: 1, b: 2 });
is_clone(B { a: 1, b: 2 });
// B<C> cannot be copied or cloned
is_copy(B { a: 1, b: C }); //~ ERROR Copy
is_clone(B { a: 1, b: C }); //~ ERROR Clone
// B<D> can be cloned but not copied
is_copy(B { a: 1, b: D }); //~ ERROR Copy
is_clone(B { a: 1, b: D });
}
|
