On 04/01/2012 11:18 PM, Chris Pons wrote:
> Thanks. I tried doing this and the list didn't update:
>
> void AddToList( SList!int list, int i )
> {
> list.insert( i );
> }
Oh, that has nothing to do with SList. SList is a struct and as a
fundamental rule of D, structs are copied to functions. SList happens to
be a struct. The list parameter of AddToList and the list variable that
is passed to the function as an argument are two different variables.
>
> SList!int intList;
>
> AddToList( intList, 42 );
>
> but when I switched to this, it worked:
>
> SList!int intList;
>
> void AddToList( int i )
> {
> intList.insert( i );
> }
Global variables are not a good solution of course. :(
The solution here is to pass the argument by-reference by the 'ref' keyword:
void AddToList( ref SList!int list, int i )
{
// ...
}
Ali
P.S. There is this chapter that covers 'ref' and most (but not all)
types of function parameters:
http://ddili.org/ders/d.en/function_parameters.html
