Re: Introspection/Reflection/etc on Linux

[Jacob Carlborg]

On 2011-10-24 05:37, J Arrizza wrote:
Robert, I tried .stringof and it didn't quite get me as far as I wanted.
But the using a template got me much closer:

    unittest
       {
       //create bob to kick off the whole thing
       new Bob();
       }

    class Base
       {
         // find all the derived members and run them
         // Base doesn't have to know anything about the derived classes
         public void runallin(alias T) ()
         {
           void delegate() dg;

           //create a delegate and run it
           foreach (i, m; __traits(derivedMembers, T))
             {
             //skip ctor, no need to run it again.
             if (m != "__ctor")
               {
               writeln("== i=", i, "  m=", m);
               //by trial and error, I found I need to use
               //    5 + the number of methods in class Base (exclude ctor)
               //right now, no additional methods, so 5 it is.
               dg.funcptr = cast(void function()) this.classinfo.vtbl[i
    + 5];
               dg.ptr = cast(void*) this;
               writeln("   calling dg");
               dg();
               }
             }
         }
       }

    // the class to auto-run
    class Bob: Base
       {
       this()
         {
         runallin!Bob;
         }
       public void inBob1()
           {
             writeln("   in bob : inBob1()");
           }

       public void inBob2()
         {
           writeln("   in bob : inBob2()");
         }
       }


Here's the output:

    == i=1  m=inBob1
        calling dg
        in bob : inBob1()
    == i=2  m=inBob2
        calling dg
        in bob : inBob2()


Getting closer. Next:
- check the signature of the methods (I want to run void fn(void) only)
- find all the classes in a given module so I don't have to "new Bob()"

You can foreach over ModuleInfo and access the classes using 
"localClasses". Have a look at the implementation of 
object.TypeInfo_Class.find in druntime.


--
/Jacob Carlborg