Inherited class methods and special variables

From: Jim Schueler (jschueler_at_tqis.com)
Date: 08/18/04

  • Next message: Greg G: "NDBM_File file not found?" 
    Date: 18 Aug 2004 11:20:12 -0700

    Here is some sample code that uses inherited class methods:

    sub parseHTML::docomment {
            my $comment = shift ;
            print $comment, "\n" ;
            }

    sub parseASP::AUTOLOAD {
            use vars qw( $AUTOLOAD ) ;

            my $key = $AUTOLOAD ;
            my $package = __PACKAGE__ ;
            $key =~ s/^${package}::// ;

            eval "parseHTML::$key( \@_ )" ;
            }

    sub parseASP::doParse () {
            ...
            local $/ = undef ;
            $content = []
            $buf = <HTMLFILE> ;
            $buf =~ s|<!--(.*?)-->|'<!-- '.&docomment( $1, $comments ).'-->'|seig ;
            ...
            }

    sub parseASP::docomment {
            my $comment = shift ;
            print $comment, "\n" ;
            }

    &doParse() ;

    The code listed above works fine, outputting each comment of an HTML file.

    If I delete the last function, parseASP::docomment(), then the inherited
    function parseHTML::docomment() should behave identically. However, this
    time, the code outputs a bunch of blank lines.

    My best theory is that the first argument, $1, is passed as a reference to a
    local special variable that goes out of scope. But common sense tells me that
    anything that goes on the stack should still be there when I pull it off.
    Having lost my mind trying to figure this out, any insight or explanation
    would be greatly appreciated.

     -Jim

  • Next message: Greg G: "NDBM_File file not found?"

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