No description - D Paste

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import std.c.stdio;
import std.stdio;
 interface a{
 int c();
 }

void main()
{
 class b:a{
 int c(){writefln("b.c");return 1;}
 }
 class c:b{
 int c(){writefln("c.c");return 1;}
 }
 class f:b{
 int k(){writefln("f.k");return 1;}
 }
 interface u:c,f,a{
 int c();
 int k();
 }
 class d:u
 {
 int c(){writefln("d.c");return 2;}
 int k(){writefln("d.k");return 2;}
 }
 d a= new d;
 c v= cast(c)a;
 f newf=cast(f)a;
 a.k(); //prints d.k
 newf.k(); //access violation
 v.c(); //access violation
}