• liumao (9/9) Oct 26 2015 for example
• Jakob Ovrum (5/14) Oct 26 2015 `A` on its own is already a reference type. `A*` is a pointer to

liumao <loveyou12300liumao 163.com> writes:

for example
     class A;
     {
         void doSomething() {}
     }

     A *a = cast(A *) new A;

     then I call a.doSomething(); my program "Segmentation fault"



how could it happened? and how i use it correctly?


3q, please tell me, 3q 3q 3q!!!!!

Jakob Ovrum <jakobovrum gmail.com> writes:

On Tuesday, 27 October 2015 at 05:36:58 UTC, liumao wrote:
 for example
     class A;
     {
         void doSomething() {}
     }

     A *a = cast(A *) new A;

     then I call a.doSomething(); my program "Segmentation fault"



 how could it happened? and how i use it correctly?


 3q, please tell me, 3q 3q 3q!!!!!

`A` on its own is already a reference type. `A*` is a pointer to 
a class reference, i.e. a pointer to a pointer, like `A**` in C++.

http://wiki.dlang.org/Coming_From/C_Plus_Plus#Slicing_problem

Please use D.learn for questions like this in the future.