Int , Float , String and Complex are Object types of int , float , string and complex , respectively. TrueObject and FalseObject is the Object that corresponds to true and false of bool type, nilObject is the Object that corresponds to nil. Descriptions for these are abbreviated. The types that are redefined as the Object type in FlowDesigner in forms conforming to the standard template library (STL) of C++ include Vector and Matrix . These types are described below.