HP Integrity NonStop J-Series - Manual (Page 28)

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©Copyright 1996 Rogue Wave Software
Concrete Classes
The concrete classes consist of:
The simple classes representing dates, times, strings, and so on, discussed in Chapters 3
through 5 (
3 , 4 , 5 );
●
The template-based collection classes, discussed in Chapter 11 ; ●
The generic collection classes using the preprocessor facilities, discussed in
Chapter 12 .
●
Simple Classes
Tools.h++ provides a rich set of lightweight simple classes. By lightweight, we mean classes
with low-cost initializers and copy constructors. These classes include:
RWDate (for dates);
RWTime (for times, with support for various time zones and locales); RWCString (for single
and multibyte strings); RWWString (for wide character strings); and RWCRegexp or
RWCRExpr (for regular expressions). Most of these classes can be held in four bytes or less,
and have very simple copy constructors (usually just a bit copy) and no virtual functions. See
the
Class Reference .
Template-based Collection Classes
Template-based collection classes, or templates for short, give you the advantages of speed and
type-safe usage. When templates are used sparingly, their code size can be quite small. When
templates are used with many different types, however, their code size can become large
because each type effectively generates a whole new class. If your compiler is capable of using
the Standard C++ Library, you can use the Tools.h++ template-based collections that are based
on the Standard C++ Library. If your compiler does not have access to the Standard C++
Library, you can still use a subset of the templates, as described in Chapter 11,
Standard C++
Library Not Required and Using Templates Without the Standard Library .