RFC! A two-column table design to separate numbers from code. :)

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$obj = MyDyn->new(id => 'MyObj'); print $obj->id, "\n"; $obj->action(); package MyDyn; use base 'DynObject'; sub action { print "hi\n"; } [download]

update

inspired by Re^5: Change default style sheet: add line numbers

Some remarks:

• line-numbers are not always in sync, line-height of { or $ may interfere (depending on CSS, YMMV)
• numbers shouldn't be real code section (no download-link) but mimic the css settings
• JS toggle could interactively hide numbers
• wrapped-over lines must not be counted
• this could also be realized as nodelet hack
• line numbers could be anchors for html-links generated from error message
• line-numbers could be only shown on_mouse_over, else hidden