rns

• Website: github.com/rns

Recent Actions

• Commented on Please Test: PPI 1.217_01 - bug fixes, speed optimizations, tests, doc improvements
  I just tested it by installing it and then (re-)installing Marpa::R2 V 2.088, which has some tests runs when PPI is available, and it Marpa::R2 built tested and installed with PPI 1.217_01 ok on windows (cl, perl 15.8.1) and cygwin...
• Commented on WTF: $Test::Builder::Level is invalid
  Not sure if that applies, but at least it looks suspiciously. Just saw [2] and [1] (which has to do with $Test::Builder::Level). [2] says: "CPAN test modules might — in their own tests — be looking for specific output and...
• Commented on Algebra of Grammars?
  Having already answered you on the merits, I can't help seeing you comment as nothing but a nice case of strawman fallacy, sorry....
• Commented on Algebra of Grammars?
  If we define an algebra of grammars as an algebra of their parseable sets and let mean union, then is commutative and I F = F I = F and I ⊂ F so grammar I F can parse floats...
• Posted Windows port of Marpa::R2 to rns

  A very good thing indeed. Can't wait to get my hand on it.

• Posted A Parser for Marpa::R2 to rns

  This proof-of-concept (test, module) parser takes input, invokes

• Posted Algebra of Grammars? to rns

  As in "I can parse integers and F can parse floats so I + F must parse integers and floats".

  Not sure what I

  *F must do though. :)

  Akin to ="http://en.wikipedia.org/wiki/Parser_combinator#The_c…

• Posted A Lexer for Marpa::R2 to rns

  This proof-of-concept lexer (module, test) extracts literals (and…

• Commented on Test::Most and timeit()
  Thanks for the hint....
• Commented on Test::Most and timeit()
  Thanks a lot for this small but beautiful enhancement! Is it possible to make timeit return the time spent to be used as part of the explanation of a test later, like this: my $tree_expected = 'some fancy stuff'; my...
• Commented on Announcing Marpa::XS 0.8.0
  @Jeffrey Kegler: thanks for pointing out to the doc on ambiguous tokens. As for natural language parsing: couldn't agree more, use of Earley in comp-ling notwithstanding. :)...
• Commented on Announcing Marpa::XS 0.8.0
  Alternation is when one symbol appears on the LHS of more than one rule. For the purposes of the above definition, [1] below is an alternation with E being the symbol appearing on the LHS of more than one rule,...
• Commented on Announcing Marpa::XS 0.8.0
  grammars which are left-recursive, right-recursive and ambiguous – even infinitely ambiguous My apology is in advance if this is just another stupid question, but I can't help thinking that what you call ambiguity (as per [1]) is really a BNF...

Comment Threads

• Shawn H Corey commented on Algebra of Grammars?

  "'putting F first means I never gets a chance to parse anything' has more to do with algebra of parser combinators that is defined in terms of parse results rather than parseable sets."

  Yes but why build a parser if you don't care about parsing? Without parsing, this is just an exercise in set theory.

  And there is a difference between I and F. I does integer division, resulting in the dropping of fractions. So the order is very important if, of course, you are actually parsing.

• Helmut Wollmersdorfer commented on WTF: $Test::Builder::Level is invalid

  It's Test::Pretty with Test::Version in combination which is broken.

  This is reproducable.

• Helmut Wollmersdorfer commented on WTF: $Test::Builder::Level is invalid

  Who is the someone using Test::Pretty? Ron, how are you starting your tests?

• Ron Savage commented on WTF: $Test::Builder::Level is invalid

  $many x $thanx for the replies.

  For each of my 8 modules which use Marpa::R2, I do:

  local $CWD = $dir_name;
  ($stdout, $stderr) = capture{system 'prove', 't'};

  Then I parse the output with:

  if ($line =~ /^Files=.+Tests=(\d+),/)

  Looking for a line like:

  Files=3, Tests=88, 2 wallclock secs ( 0.04 usr 0.02 sys + 2.15 cusr 0.04 csys = 2.25 CPU)

  And no, this is not the problem :-).

  The first module, Graph::Easy::Marpa, works. It does not use Test::Version. All its tests use Test::More.

  The second module, Gra…

• Ether commented on WTF: $Test::Builder::Level is invalid

  
  For each of my 8 modules which use Marpa::R2, I do:

  local $CWD = $dir_name;
  ($stdout, $stderr) = capture{system 'prove', 't'};

  Then I parse the output with:

  if ($line =~ /^Files=.+Tests=(\d+),/)

  Looking for a line like:

  Files=3, Tests=88, 2 wallclock secs ( 0.04 usr 0.02 sys + 2.15 cusr 0.04 csys = 2.25 CPU)

  Please for the love of all kittens, use Test::Harness to run your tests and
  then ask it for the result, rather than manually parsing the text output.