This and other RFCs are available on the web at http://dev.perl.org/rfc/ =head1 TITLE with takes a context =head1 VERSION Maintainer: David Nicol <[EMAIL PROTECTED]> Date: 28 Sep 2000 Mailing List: [EMAIL PROTECTED] Number: 340 Version: 1 Status: Developing =head1 ABSTRACT "call frames" become useful as objects. The current one is always C<with> with no argument and you can get into an arbitrary one by using C<with $whatever BLOCK> in either forward or backward form, like C<if>. =head1 DESCRIPTION =item description by commented example sub A{ my $A = shift; return with; }; $context1 = A(3); print "$context1"; # something like CONTEXT(0XF0GD0G) print "$A" with $context1; # prints 3 with $context1{print "$A"}; # same thing =item coexistence w/ pascal-like with The context-access C<with> takes a scalar argument, the pascal-like with takes a hash. If the pascal-like with is considered as describing aliases to defined variables, the two have deep similarities. =item CONTEXT objects in other contexts In an array context, one of these CONTEXT things will expand into key-value pairs if it can. =item warning about memory leaks using C<with> to store contexts may adversely affect memory recycling. =head1 IMPLEMENTATION Perl5 has the hooks required to do this: the closure stuff. This proposed C<with> keyword makes access into such things more explicit. =head1 REFERENCES None.
