Method RawLength

lua.go:813–823

RawLength returns the length of the value at index. For strings, this is the length. For tables, this is the result of the # operator with no metamethods. For userdata, this is the size of the block of memory allocated for the userdata (not implemented yet). For other values, it is 0. http://www

(index int)

//
// http://www.lua.org/manual/5.2/manual.html#lua_rawlen
func (l *State) RawLength(index int) int {
	switch v := l.indexToValue(index).(type) {
	case string:
		return len(v)
	// case *userData:
	// 	return reflect.Sizeof(v.data)
	case *table:
		return v.length()
	}
	return 0
}

// ToGoFunction converts a value at index into a Go function.  That value
// must be a Go function, otherwise it returns nil.