Hi all,
Consider this code:
struct Test1 {
a: ~str,
b: f32,
}
struct Test2 {
c: ~str,
d: f64
}
impl Test1 {
fn into_test2(self) -> Test2 {
Test2 {
c: self.a,
d: self.b as f64
}
}
}
In into_test2() method I want to consume Test1 struct completely. But
because ~str is not implicitly copyable, self.a is moved out of self,
and on Test2.d field assignment I get the following error:
main.rs:15:16: 15:21 error: use of partially moved value: `self`
main.rs:15 d: self.b as f64
^~~~~
main.rs:14:16: 14:22 note: `self.a` moved here because it has type
`~str`, which is non-copyable (perhaps you meant to use clone()?)
main.rs:14 c: self.a,
^~~~~~
I know that I can, say, do self.a.clone() to avoid moving, but I don't
want extra allocations. And it is also possible to reorder Test2
fields assignments and it will work, but it won't if both fields are
not copyable.
So, the question is: how to correctly correctly move several pieces of
data out from a struct without using clone()? Is it possible at all?
Thanks,
Vladimir.
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