'gc' tag method
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- Subject: 'gc' tag method
- From: "Leiradella, Andre V Matos Da Cunha" <ANDRE.LEIRADELLA@...>
- Date: 2002年3月21日 10:52:26 -0300
Hi all,
Sorry if this has been answered before but why can't I set the 'gc' tag
method from inside a lua program? I need to call a 'destructor' method
whenever an instance of my class system is destroyed.
I know I can do it in C but why should I do
-----cut-----
static int destructor(lua_State *L) { // instance
lua_pushstring(L,"destructor"); // instance 'destructor'
lua_gettable(L,-1); // instance destructor_function
if (lua_isfunction(L,-1)) {
lua_pushvalue(L,-2); // instance destructor_function
instance
lua_call(L,1,0); // instance
}
return 0;
}
int main() {
...
instancetag = lua_newtag(L);
lua_pushcfunction(L,destructor);
settagmethod(L, instancetag, "gc");
...
}
-----cut-----
instead of just
-----cut-----
function destructor(instance)
if type(instance.destructor)=='function' then
instance:destructor()
end
end
instancetag=newtag()
settagmethod(instancetag, 'gc', destructor)
-----cut-----
? I'm using lua 4.0.
Thanks,
André de Leiradella