Doxygen Filter is an input filter for Doxygen enabling support for Perl code documentation.

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Of course, Perl developers are used to use POD rather than some other code documentation tools. However, most developers actually are not restricted to using one single language. Instead of using multiple code documentation systems one tends to use one tool for all - Doxygen is quite a powerful code documentation system that already has built-in support for multiple programming languages.

Unfortunately, Doxygen does not directly support Perl. Thus, Doxygen Filter has been written in order to be able to use Doxygen for generating code documentation for Perl projects, too.

Doxygen supports many programming languages. Support for many others have been added via input filters like DoxygenFilter.

DoxygenFilter is unique since it does not require a pass-fail decision from your side. Depending on the source file type it does parse the file itself (Perl), pass it on to other filters (currently Pascal, Java Script, others planned) or pass it on directly to doxygen.

Therefore DoxygenFilter has become a valuable input filter for software projects using multiple programming languages.