int Instance::lua_IsAncestorOf(lua_State* L){
Instance* inst = checkInstance(L, 1);
if(inst){
bool throwErrorIf = true;
Instance* otherInst = NULL;
if(lua_isnil(L, 2)){
throwErrorIf = false;
}else{
otherInst = checkInstance(L, 2);
}
if(otherInst != NULL || !throwErrorIf){
bool isIt = inst->IsAncestorOf(otherInst);
lua_pushboolean(L, isIt);
return 1;
}else{
return luaL_typerror(L, 2, "Instance");
}
return 0;
}
return luaL_error(L, COLONERR, "IsAncestorOf");
}
bool Instance::IsAncestorOf(Instance* descendant){
if(descendant == NULL){
return true;
}
for(std::vector<Instance*>::size_type i = 0; i != children.size(); i++){
Instance* kid = children[i];
if(kid != NULL){
if(kid == descendant){
return true;
}
}
}
for(std::vector<Instance*>::size_type i = 0; i != children.size(); i++){
Instance* kid = children[i];
if(kid != NULL){
bool isAncestor = kid->IsAncestorOf(descendant);
if(isAncestor){
return true;
}
}
}
return false;
}