Hi all! I’m not sure is it an error or static mut variables misunderstanding
from my side. The source:
struct MyStruct {
val: int
}
static mut global_data: Option~MyStruct = None;
fn test_call() {
unsafe {
match global_data {
Some(data) = { println!(We have data
Your code is moving the contents of Option~MyStruct into the match arm. It
just so happens that this seems to be zeroing out the original pointer in
memory, and that happens to be the same representation that None does for the
type Option~MyStruct (since ~ pointers are non-nullable), so the act
damned, my gmail client was not up to date, you've got a better answer
already (I got the ref keyword right at least ;))
On Tue, Jan 28, 2014 at 1:00 PM, François-Xavier Bourlet
bomb...@gmail.com wrote:
match global_data {
Some(data) =
You should be able to do:
Some(ref data)
Probably this should yield an error -- I tend to think we should only
permit moves that we cannot enforce from `*` pointers, just to add an
extra barrier.
Niko
On Tue, Jan 28, 2014 at 12:12:23PM -0800, Kevin Ballard wrote:
Your code is moving the contents of Option~MyStruct into the match arm.
Our discussion in a recent meeting concluded that statics will not be
allowed to contain types with destructors, and you also won't be able
to move out of static items:
https://github.com/mozilla/rust/issues/10577#issuecomment-32294407
On Tue, Jan 28, 2014 at 3:34 PM, Kevin Ballard ke...@sb.org
