On Saturday, 7 June 2014 at 21:17:41 UTC, monarch_dodra wrote:
On Saturday, 7 June 2014 at 20:56:14 UTC, Paul wrote:
Dynamic array is really reference. Right? But why modification
of parameter in this case does not work:
void some_func(string[] s) {
s ~= "xxx"; s ~= "yyy";
}
but this works:
void some_fun(ref string[] s) {
s ~= "xxx"; s ~= "yyy";
}
In the 1st case s is reference too, is not it?
It's a value type that holds a reference to data. If you modify
the *actual* slice, rather than the referenced items, then you
need to pass by ref.
Seems that string[] is not real reference as in C++. As I
understand there is only one array of strings. And when I try to
modify it in function with ref or whithout - array is the same
and should be modified. Or there is hidden copy of this array? Or
there is some policy in reference semantic - modifiable dynamic
array and read only - when it is copying in stack as function
argument :)
