Hi,
When I try to compile this program, I get a "Use of moved variable" error.
fn fun(b: ~[u8]) {
// ...
}
fn main() {
let bytes: ~[u8] = ~[1,2,3];
loop { fun(bytes); }
}
t.rs:8:13: 8:18 error: use of moved variable: `bytes`
t.rs:8 loop { fun(bytes); }
^~~~~
I can avoid the problem, by rewriting the program towards this:
fn fun(b: ~[u8]) -> ~[u8] { b }
fn main() {
let mut bytes: ~[u8] = ~[1,2,3];
loop {
bytes = fun(bytes);
}
}
I find this somehow very unintuitive, but of course I understand that
the variable "has to move back".
Of course I can rewrite function "fun" to use &[u8] as parameter, but I
want to call TcpSocket.write, which only accepts
a ~ [u8] and I don't know how to convert a &[u8] into a ~[u8]. As & can
point to managed boxes I don't think it's possible
to convert safely.
So is there another "nice" solution to the problem? Maybe I am missing
something...
Best,
Michael
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