Perl 6
rakudo feature status: Revision 29
rakudo feature status does not have any headers.


Common things that are known to have problems or not work in Rakudo

(As of 2009-01-10.)
Where appropriate, provide a reference to the corresponding RT ticket. Note that we aren't trying to make a list of all known bugs -- that's what RT is for. This should just be for the common issues that people will want to be aware of or work around when playing with Rakudo.

  • reading array/hash elements causes them to autovivify (RT #61882)
  • incorrect parsing of blocks followed by 'if', 'unless', 'while', 'until', 'given', etc. (RT #57876)
  • accessing outer lexicals from eval
  • handles handle only String and List of String, Tepy and Regex not work yet
  • lazy lists
  • lazy ranges
  • prefix and postfix hyperoperators
  • //= (RT #61880)
  • operator overloading, defining new operators
  • nested package/grammar/class declarations
  • autothreading of methods over Junctions
  • slices/indexing of Ranges (RT #61848)
  • filling positional parameters by named argument (RT #54808)
  • assigning values to %*ENV (RT #57400)
  • methods on Match cannot be used as rule names (RT #57864)
  • some things that should be readonly aren't
  • autovivification of undefs to arrays/hashes
  • my Int @a; (RT #61926)
  • variables in regexes (RT #61960)
  • .want on Routines, Blocks or Closure not implemented yet (but .arity works)
  • Perl 6 closures in regexes (although it is possible to execute some PIR, on the form {{ PIR HERE }})
  • code assertions in regexes -- i.e., <?{...}> and <!{...}> (but PIR forms are available, as <? {{ PIR HERE }}>)
  • interpolations of arrays, hashes, and method calls in strings (RT #62198)
    • Note that the { ... } form is a usable workaround
  • what should be Regex objects are currently Code objects

Things that do (mostly?) work in Rakudo

See also the twitter feed at http://twitter.com/rakudoperl.

  • $scalar, @array, %hash variables, my and our declaration
  • sub, multi sub, sub and methods signatures with types and defaults
  • OO stuff mostly works: classes, methods, submethod, roles; has, self, is, of, does, handles etc.
  • for, loop, repeat, while
  • if, elsif, else, unless, given, when
  • junctions (auto-threading partiality works )
  • selected infix hyperoperators, reduction operators, cross (X) and zip (Z) operators
  • slicing syntax
  • chained comparison operators ( if 1 < $a < 100 { ... } )
  • whatever star in slices
  • closures
  • currying (i.e., .assuming)
  • .arity (but .want not implemented yet)
  • simple next/last/redo
  • take/gather
  • pointy blocks ( -> $foo { ... } )
  • open (:w or :r) and slurpy files (and that is all, IO stuff mostly not implemented yet)
  • eval and try/CATCH
  • Ranges
  • max, min built-ins (but minmax not implemented yet)
  • m// .trans and .subst (s// not implemented yet)
  • grammar and .parse method to match it
  • pick() and .pick
  • rand()
  • set context: list and .list, item and .item, ~, hash and .hash (but @ and $ not implemented )
  • ^ twigil, you can do { say $^a }('Yay');

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