I suspect that autoloader would make it difficult to determine whether a used module's sub is never actually used or not; different data may result in different paths through the module's code, so the sub may be called when $x = 1.0 but not when $x = 1.5.

A sub may exist or not depending on how the code runs, too.

Eval, autoload, symbol table changes, and code filters in @INC can all (re)define a subroutine as the code runs. Don't expect any sort of tool to catch that sort of thing; they can't.

Don't expect perfection from these tools; they give a decent effort on code that's sufficiently conventional, but they can't do much with really exotic stuff.

In reply to Re^2: Perl Analyzer? by Anonymous Monk
in thread Perl Analyzer? by Coldstone

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