Code Farms - Pattern Template Library

						Visitors . Since Jan1,2000

Pattern Template Library

This unique, new library provides a unified implementation of intrusive data structures and structural patterns in the form of C++ templates. When you need a pattern such as Composite, Flyweight, or a fast Finite State Machine, just grab the class from the library. The library simplifies C++ coding, and is designed as a framework into which users can easily add new patterns. Explore this new, elegant coding technique - no preprocessing or code generation is required.

Version 1.1 of the library includes:

Intrusive list, collection, aggregate (one-to-many)
Dynamic array
Pointer array
Composite
Flyweight
Dynamically reconfigurable finite state machine (1)

The library ships in full source, and it should work with any C++ compiler which supports templates, regardless of the operating system. It has been tested with Sun/Solaris C++, Microsoft VC++, Borland C++, and Watcom C++. It does not run with GNU, because g++ Ver.2.7.2 does not have full template capability.

(1) The free software include the Pattern Template Library, but does not include our special, fast, and dynamically reconfigurable Finite State Machine. Please contact us for access to this feature.

Comparing Class Libraries

There are no other class libraries which provide automatically persistent data structures. For this reason, the comparision shown here considers only the data structure implementation, the ease of use, and the run-time performance. Note that in addition to being persistent, DOL wins on all these accounts.

Eli Tilevich, as a part of his PhD program at the Georgia Institute of Technology, produced a report comparing

Code Farms DOL and PTL Libraries
Standard Template Library (STL)
Microsoft Foundation Classes (MFC)

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Download Report with Benchmark Programs

Jiri Soukup, the author of DOL and PTL, wrote the comparision with the Rogue Wave tools.h++ Library. He not only compares existing products, but also shows the reasons for using intrusive data structures.

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