Leopold Toetsch wrote:
Klaas-Jan Stol wrote:
mmm, I looked at classes/none.pmc, this is a copy/paste:
===============
#include <assert.h>
static PMC * Py_None;
pmclass None singleton {
Ah, yep - None is a singleton too - sorry for my confusion.
So it should be rather easy to subclass None, implement
get/set_pointer and use a distinct file-static PMC* storage for your
singleton.
leo
ah great. it works! :-). Apparently, inheriting from a singleton class
doesn't make the child class a singleton, you have to add the
"singleton" keyword in the class definition header.
one more question though:
1a: when are set_pointer and get_pointer actually called?
1b: in set_pointer (I copied it from None.pmc) an assertion is done. Why
is this? (this is also part of question 1a: set_pointer is called once,
apparently?)
void set_pointer(void* ptr) {
assert(!Lua_Nil);
Lua_Nil = (PMC*) ptr;
}
Anyway:
P0 = new "LuaNil"
print P0
prints "nil". Great! :-)
thanks.
klaas-jan
