Re^13: A "Perl-7" that I could actually USE right now

[raiph]

TL;DR Based on an audit, I estimate about 100 of the 120+ P6 advent articles of the last 5 years remain 100% current; about 5 to 10 are fundamentally broken; most of the remainder have only trivial problems.

Update David Warring has begun working his way through the advent posts creating tests for the code in them

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How many years of advent articles no longer work because they only ran on Pugs or Necza or Parrot and those are now broken?

(Fwiw I think some contributors to these projects would say they're not broken.)

Using the P6 advent search box to search thru the 5 years worth of advent articles:

• 3 articles match "Pugs". None of the articles in which Pugs is mentioned have Pugs specific code, so no breakage.

• 21 articles match "Niecza". There's a "contributing to P6" article that focuses on Niecza and C# code. Let's call that fundamentally broken. Two articles (tetris and the 2011 mandelbrot) use CLR libraries. The P6 code itself looks valid, so these articles might work fine if/when there's a Rakudo/.NET, but I'll call these fundamentally broken. The rest don't contain Niecza specific code or instructions.

• 15 articles match "Parrot". The two articles Reini Urban wrote last year are Parrot specific (threads, and low level encoding details). The rest don't contain Parrot specific code or instructions.

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How many no longer run because the design of Perl-6 changed?

I'm not currently willing to go thru all 100+ articles. I've gone thru the first 10 articles for 2009 and 2011 and entered the examples in a current Rakudo. Afaict, all of the 2009 articles remain 100% valid and two of the 2011 articles generate a message (both trivial to fix):

• The 2011 day 4 article "Traits — Meta Data With Character" led to a deprecated message:

  Saw 1 call to deprecated code during execution.
  ================================================
  Method exists (from EnumMap) called at:
    /tmp/pssDL_7axD, line 1
  Please use the :exists adverb instead.
  

  This year we have advents covering the deprecation message mechanism, adverbs in general and the :exists adverb.

• The 2011 day 7 article "Adventures in writing a simple grammar profiler" led to this message:

  Obsolete use of | or \ with sigil on param $args
  

  Nowadays you have to use terms, not sigiled variables, eg writing |args rather than |$args.

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How many no longer run because they use some library that no longer runs?

Other than the CLR libraries used by Niecza, I didn't see any articles with this problem in the sampling I went thru.