Softpanorama (slightly skeptical) Open Source Software Educational Society

May the source be with you, but remember the KISS principle ;-) Softpanorama Search

Perl Xref

The most useful option the cross referencer has is to save the report to a separate file.  For instance, to save the report on myperlprogram  to the file report:

         $ perl -MO=Xref,-oreport myperlprogram
 

The cross referencing back end (B::Xref) produces a report on your program, breaking down declarations and uses of subroutines and  variables (and formats) by file and subroutine.  For instance, here's   part of the report from the pod2man program that comes with Perl:

         Subroutine clear_noremap
           Package (lexical)
             $ready_to_print   i1069, 1079
           Package main
             $&                1086
             $.                1086
             $0                1086
             $1                1087
             $2                1085, 1085
             $3                1085, 1085
             $ARGV             1086
             %HTML_Escapes     1085, 1085

       This shows the variables used in the subroutine "clear_noremap".  The
       variable $ready_to_print is a my() (lexical) variable, introduced
       (first declared with my()) on line 1069, and used on line 1079.  The
       variable $& from the main package is used on 1086, and so on.

       A line number may be prefixed by a single letter:

       i   Lexical variable introduced (declared with my()) for the first
           time.

       &   Subroutine or method call.

       s   Subroutine defined.

       r   Format defined.
 

Recommended Links

BXref - Generates cross reference reports for Perl programs

CPANXR

Perl Cross-Reference Tool