Andrei Alexandrescu wrote:
Jacob Carlborg wrote:
On 10/9/09 18:40, Andrei Alexandrescu wrote:
I'm talking with Sean and Walter about taking the first step towards
eliminating delete: defining function clear() that clears the state of
an object. Let me know of what you think.
One problem I encountered is that I can't distinguish between a default
constructor that doesn't need to exist, and one that was disabled
because of other constructors. Consider:
class A {}
class B { this(int) {} }
You can evaluate "new A" but not "new B". So it's legit to create
objects of type A all default-initialized. But the pointer to
constructor stored in A.classinfo is null, same as B.
Any ideas?
Andrei
How about this:
static if (is(typeof({
auto t = new T;
})))
I'm in awe. Thanks, Jacob!!!
Andrei
Oh, wait, that doesn't work:
class A {}
class B : A { this(int) {} }
A a = new B;
clear(a); // oops
Andrei
