Announce: Rakudo Star Release 2015.07

A useful, usable, “early adopter” distribution of Perl 6

On behalf of the Rakudo and Perl 6 development teams, I’m happy to announce the July 2015 release of “Rakudo Star”, a useful and usable distribution of Perl 6. The tarball for the July 2015 release is available from

This Rakudo Star release comes with support for the MoarVM backend (all module tests pass on supported platforms).

In the Perl 6 world, we make a distinction between the language (“Perl 6”) and specific implementations of the language such as “Rakudo Perl”. This Star release includes release 2015.07.2 of the Rakudo Perl 6 compiler, version 2015.07 of MoarVM, plus various modules, documentation, and other resources collected from the Perl 6 community.

Some of the new compiler features added to this release include:

  • Cool.substr(-rw) and &substr(-rw) now also accept a Range
  • Added trait “is required” on class attributes
  • &?ROUTINE and &?BLOCK
  • &words implemented (to completement .words)
  • Numeric comparison ops (== > etc) for DateTimes
  • samewith() now also works in subs
  • Calling the .clone method with alternate values no longer changes original
  • .grep and &grep now consume multiple elements for many-param blocks
  • ENTER phaser now can be used as an r-value

Notable changes in modules shipped with Rakudo Star:

  • Bailador: Add links to documentation
  • DBIish: Use Postgres environment variables for test configuration
  • doc: More documentation, mostly for IO-related classes and methods

There are some key features of Perl 6 that Rakudo Star does not yet handle appropriately, although they will appear in upcoming releases. Some of the not-quite-there features include:

  • advanced macros
  • non-blocking I/O (in progress)
  • much of Synopsis 9 and 11

There is an online resource at that lists the known implemented and missing features of Rakudo’s backends and other Perl 6 implementations.

In many places we’ve tried to make Rakudo smart enough to inform the programmer that a given feature isn’t implemented, but there are many that we’ve missed. Bug reports about missing and broken features are welcomed at

See for links to much more information about Perl 6, including documentation, example code, tutorials, reference materials, specification documents, and other supporting resources. A draft of a Perl 6 book is available as docs/UsingPerl6-draft.pdf in the release tarball.

The development team thanks all of the contributors and sponsors for making Rakudo Star possible. If you would like to contribute, see, ask on the mailing list, or join us on IRC #perl6 on freenode.

About moritz

Just another Perl 6 hacker
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