in reply to Side Context in an 'lvalue' Subroutine

I think the Want module might be exactly what you're looking for.
HTH

broquaint

  • Comment on Re: Side Context in an 'lvalue' Subroutine

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Re^2: Side Context in an 'lvalue' Subroutine
by tadman (Prior) on Mar 18, 2002 at 19:21 UTC
    The Want module is quite interesting, but seems a little awkward in terms of implementation. Here's an example: 
    use Want;

sub fooz : lvalue
{
     defined ($foo_new)?
        $foo_new
        : (want('LVALUE','ASSIGN')?
              $foo_new = $foo
              : $foo);
}

    [download]
    Internally, there is a function from the Wait.xs component called 'want_lvalue', which is really all I need. If it were assigned a default parameter value (it relates to stack depth) then it could be used like so: 
    use Want;

sub fooz : lvalue
{
     defined ($foo_new)?
        $foo_new
        : want_lvalue?
              $foo_new = $foo
              : $foo);
}

    [download]
    This does seem to be a lot neater, though not currently implemented.

    It just goes to show that CPAN has a module for every occasion. I wouldn't be surprised to see Cheese::Grater.

    Thanks for the tip. It's exactly what I was looking for.
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