On Thursday, 29 March 2018 at 20:26:59 UTC, kdevel wrote:
What is the lifetime of the first loop's variable i?
It lives as long as the delegate.
What about this example:
``` bug2.d
import std.stdio;
void main ()
{
int delegate () [] dg;
foreach (i; 0..2) {
int *j;
if (i == 0) {
auto k = i;
j = &k;
}
else {
auto l = i;
j = &l;
}
dg ~= () => *j;
}
foreach (p; dg)
p ().writeln;
}
```
As far as I can understand it, you get a closure for j, but not
for i, k, or l. So `*j` will be garbage.
The compiler doesn't consider where j points. It just goes by the
variables that are used in the delegate.
