On 2/27/2011 8:10 AM, Simen kjaeraas wrote:
Tyro[a.c.edwards] <nos...@home.com> wrote:
class Class{}
void main()
{
Class myClass;
Class* pClass0 = &myClass; // OK
Class* pClass1 = new Class; // Error: cannot implicitly convert [8]
// expression (new Class) of type t.Class
// to test.Class*
Class* pClass2 = &(new Class);
// Error: new Class is not an lvalue [12]
Class mClass = &(new Class);// Error: cannot implicitly convert [14]
// expression (&new Class) of type Class*
// to test.Class
}
C++ uses the process on line [8] above to initialize a class pointer.
Obviously it does not work in D. But given the error message at [14],
I thought [12] would have been allowed. What is the proper way to
convert [8] to D?
Classes in D are already references (like Class& in C++), thus line [8]
would be a pointer to a reference to a class, something which may make
some kind of sense, but is unlikely to be what you want.
Perhaps this question is better answered if you explain why you want a
pointer to a class?
I'm trying to convert some c++ code that defines
T func(par...)
{
Controller * pCtrl = WinGetLong<Controller *> (hwnd);
.
.
.
switch(msg)
{
case FirstMatch:
pCtrl = new Controller (hwnd, reinterpret_cast<CREATESTRUCT *>
(lParam));
break;
}
}
I'm not sure why I need a pointer to the class, just trying to figure it
out.
