SPL Type Handling

Introduction
SplInt — The SplInt class
- SplInt::__construct — Constructs an integer object type
SplFloat — The SplFloat class
- SplFloat::__construct — Constructs a float object type
SplEnum — The SplEnum class
- SplEnum::__construct — Constructs an enumeger object type
SplBool — The SplBool class
- SplBool::__construct — Constructs a bool object type