Find out in program code, if a PMC-property is set?

[Bob Rogers]

   From: Gerd Pokorra <[EMAIL PROTECTED]>
   Date: Fri, 25 Aug 2006 20:06:17 +0200

   Hello!

   In my program code I have the following lines:

     /* get properties */
     PMC *context_pmc = $3->vtable->getprop(interpreter, $3,
                        string_from_cstring(interpreter, "context", 7));

     INTVAL i_type = context_pmc->vtable->type(interpreter, context_pmc);

   This works fine, if I set the property "context" for the PMC in the
   pasm-program.

   If I don't set the property, the pasm-program stops with the message:
   Null PMC access in type()
   current instr.: '(null)' pc 45 (pcre_prop.pasm:33)

   I what to find out in my program first, if the property is realy set,
   but I don't know how to do that.

   Best regards
   Gerd Pokorra

See PMC_IS_NULL (defined in include/parrot/interpreter.h).

                                        -- Bob Rogers
                                           http://rgrjr.dyndns.org/