How's this?
$ head -n 1 *.pm
==> AA.pm <==
package AA; use base qw/Exporter/; our @EXPORT=qw/$knob1/; our $knob1
+= 'no'; 1
==> BB.pm <==
package BB; use AA; our @ISA=qw/AA/; our @EXPORT=qw/$knob1/; 1
==> CC.pm <==
package CC; use BB; our @ISA=qw/BB/; our @EXPORT=qw/$knob1/; 1
$ perl -MCC -MBB -lwe '$BB::knob1=42; print for $AA::knob1, $BB::knob1
+, $CC::knob1'
42
42
42
Note, however, that the following *doesn't* work. (use base doesn't call import)
$ head -n 1 *.pm
==> AA.pm <==
package AA; use base qw/Exporter/; our @EXPORT=qw/$knob1/; our $knob1
+= 'no'; 1
==> BB.pm <==
package BB; use base qw/AA/; our @EXPORT=qw/$knob1/; 1
==> CC.pm <==
package CC; use base qw/BB/; our @EXPORT=qw/$knob1/; 1
$ perl -MCC -MBB -lwe '$BB::knob1=42; print for $AA::knob1, $BB::knob1
+, $CC::knob1'
no
42
Use of uninitialized value in print at -e line 1.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|