Adapting Win32 Enumeration APIs to STL Iterator Concepts

摘要

This article has described some of the ideas represented in the STL Sequence and Iterator concepts. It has also highlighted some issues that are important when implementing your own STL-compliant sequences and iterators, and has illustrated these issues by presenting two enumeration API- adapting sequence classes, findfile_sequence, and reg_key_sequence, and their supporting classes. I've endeavored to show that the implementation of correct, robust, and efficient sequences and iterators, though involved, is not as complex as might be expected. Hopefully, I've demonstrated that using such classes is straightforward indeed, especially so given that they can be used with standard algorithms and functionals, as shown in the example programs included with this article. All the WinSTL classes, and supporting STLSoft code, are available online, along with an increasing number of other classes, algorithms, and functionals. Furthermore, the libraries are open to expansion for anyone who wishes to submit their own classes.