int PrepareUpvalue(GenerateFunction func, string name, out bool is_local)
{
int index;
index = SearchFunctionLocalName(func, name);
if (index >= 0)
{
is_local = true;
return(index);
}
index = func.function.SearchUpValue(name);
if (index < 0 && func.parent != null)
{
bool is_from_parent = false;
index = PrepareUpvalue(func.parent, name, out is_from_parent);
if (index >= 0)
{
index = func.function.AddUpValue(name, index, is_from_parent);
}
}
is_local = false;
return(index);
}
int SearchFunctionLocalName(GenerateFunction func, string name)
{
var block = func.current_block;
while (block != null)
{
LocalNameInfo name_info = null;
if (block.names.TryGetValue(name, out name_info))
{
return(name_info.register);
}
else
{
block = block.parent;
}
}
return(-1);
}
void EnterFunction(int define_line, string define_name)
{
var func = new GenerateFunction();
var parent = _current_func;
func.parent = parent;
func.function = new Function();
func.function.SetFileName(_file_name);
func.define_line = define_line;
if (parent != null)
{
var index = parent.function.AddChildFunction(func.function);
func.func_index = index;
}
if (define_name == null)
{
define_name = parent.define_name + "+" + func.func_index;
}
func.define_name = define_name;
func.function.SetFuncName(define_name);
_current_func = func;
}
void LeaveFunction()
{
// auto gc, just forget about it
_current_func = _current_func.parent;
}
