On Monday, 25 November 2019 at 09:00:49 UTC, Dukc wrote:
On Monday, 25 November 2019 at 03:07:08 UTC, Fanda Vacek wrote:
Is this preferred design pattern?
```
int main()
{
int a = 1;
//ref int b = a; // Error: variable `tst_ref.main.b` only
parameters or `foreach` declarations can be `ref`
ref int b() { return a; }
b = 2;
assert(a == 2);
return 0;
}
```
Fanda
It's okay, but I'd prefer an alias, because your snippet uses
the heap needlessly (it puts variable a into heap to make sure
there will be no stack corruption if you pass a pointer to
function b() outside the main() function)
Yes alias can help, but my original need was like
void main() @safe
{
int[] a = [1, 2];
alias head = a[0];
head = 2;
assert(a[0] == 2);
}
there the alias doesn't work
Fanda
