HP Integrity NonStop J-Series - Manual (Page 151)

typesafe, and their objects are slightly larger. These disadvantages are easily outweighed by the
power of these classes, and their clean programming interface. Most importantly, the
Smalltalk-like collection classes are well-suited for heterogeneous collections and polymorphic
persistence.
Many of the Tools.h++ Smalltalk-like classes have a typedef to either the corresponding
Smalltalk names, or to a generic name. This typedef is activated by defining the preprocessor
macro RW_STD_TYPEDEFS. Although you are free to use typedefs, we do encourage you to
use the actual class names to make your code more maintainable.