Hi, I'm curently playing around with open calls returning a PMCNULL instead of a half valid IO-Object. But the main problem with that is that there is currently no way for the byte-code to detect such a case. The if and unless ops call the get_boolean vtable method which throws an internal exception. As we can create a PMCNULL with the null_p op there should at least be a way to test for a PMCNULL. Two possible solutions come to my mind
* A PMCNULL has false semantics. This may be done by letting get_boolean return FALSE, or by adding a test to if_p_ic op: if(!PMC_IS_NULL($1) && $1->vtable->get_boolean($1)) * Have a special op for this if_null and unless_null which exlusively test for NULL. Comments boe -- Juergen Boemmels [EMAIL PROTECTED] Fachbereich Physik Tel: ++49-(0)631-205-2817 Universitaet Kaiserslautern Fax: ++49-(0)631-205-3906 PGP Key fingerprint = 9F 56 54 3D 45 C1 32 6F 23 F6 C7 2F 85 93 DD 47
