[Python-Dev] Proposal: C API Macro to decref and set to NULL

[Delaney, Timothy C (Timothy)]

Tim Peters wrote:

> BTW, re-invented at least as often is a VISIT macro for use in
> tp_traverse slots, like typeobject.c's (and several other files')
> 
> #define VISIT(SLOT) \
> 	if (SLOT) { \
> 		err = visit((PyObject *)(SLOT), arg); \
> 		if (err) \
> 			return err; \
> 	}

Shouldn't this also be wrapped in a do {} while (0)?

Tim Delaney