Am 01.09.2011, 16:10 Uhr, schrieb zhang <[email protected]>:
Here are some codes:
class AClass
{
int a = 10;
}
struct AStruct
{
AClass aclass;
// this() // can't do this in a struct
// {
// aclass = new AClass()
// }
this(AClass aclass_)
{
aclass = aclass_;
}
}
int main(string[] args)
{
AStruct astruct;
int a = astruct.aclass.a;
writefln("%d", a);
return 0;
}
In D, this() is prohibited in a struct. So
AStruct astruct
will leave the aclass object to be null. It's not like the way in C++,
the aclass object will be created automatically.
It always leads some problems when doing porting from C++ to D.
My solution is to use class instead of struct. Then I can create the
aclass object in this() when I new an AStruct.
Any suggestion?
Thanks.
----------
Zhang <[email protected]>
C++ has an easy position because it handles structs almost like classes.
The only difference I notice is that everything is public by default in a
struct. So technically your structs would probably better be matched by D
classes. But that's of course not what you intended in the C++ code in the
first place. :)
