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v5 - Perl5 for rakudo

v5 will let you run Perl 5 code beside Perl 6 code, like:

use v6;
grammar Foo {
    method bar { ... }

    use v5;
    if( $^O eq 'MSWin32' ) {
        say $0 # Perl 5's special variable for program name
        use 6.0.0;
        multi sub foo(*@args) {

say "Back to Perl 6 on a $* box." # $*DISTRO is a Perl 6's "special variable"

The goal is to be able to run all pure-Perl 5 code besides Perl 6. One benefit of this approach (reimplementing Perl 5 with Perl 6's object system) is to be able to pass data/objects easily between both languages. XS will not be supported, since it depends of Perl 5's internal structure.


panda install v5


perl6             # run a file that has a `use v5` at the top
perl6 -MPerl5 # run a file that hasn't