GSoC progress repor

[Jonathan "Duke" Leto]

Howdy,

This is a nice and detailed report! Keep them coming.

Duke


On Tue, Aug 20, 2013 at 1:43 PM, Paweł Murias <pawelmurias at gmail.com> wrote:

> All tests in nqp/t/nqp with the exception of test 49 are passing.
>
> Test 49 among other things requires compiling regexes at runtime.
>
> Example: my $regex := "a+";"aaaaa" ~~ /<$regex>/;
>
> This is easy to do after bootstraping (when we have the whole compiler avaliable at runtime) or a bunch of crafty hacks.
> After attempting to quick hack a workaround (which would involve starting up a new parrot process to cross compile a regex) it turned out our current cross compiling solution won't work. I decided to avoid waisting time on that and leave it to after the boostrap.
>
> t/nqp directory in the nqp repository contains all the tests for the NQP language features.
> There are also tests in t/qregex which are really a whole bunch of regex and their expected results on a suplied string.
> (in a tab separated format + a harness).
> And 3 tests in t/serialization which would involve a boring translation of serialization code from a different backend.
>
> What seems to be a good direction is to get all the tests qast tests (which were written by Jonathan while porting nqp to the jvm) under JavaScript. They test the backend without requiring a parser. Doing that has uncovered a number of bugs in nqp-js. Major things like multi methods seem to work correctly but I have encoutered many small bugs. Which seems to imply that the nqp test suit needs to be more exaustive.
> A few examples of those and their fixes:
>
> nqp::null() was tested for truthfullness is some places, we are currently doing that using a .Bool method so I had instead of using a native javascript null switch to using a custom singleton for that.https://github.com/pmurias/rakudo-js/commit/896e597f1358a3a51d64a955eb4d013dc4fe2d27
>
> Objects being false by default caused if $slurp {...emit some code for slurp...} not to workhttps://github.com/pmurias/rakudo-js/commit/580829d2ea337c57fad19273d232ccfb15b9baa4
>
> \n not being implemented in regexes caused subst(/\n/,"\\n",:global) to loop infinitly:https://github.com/pmurias/rakudo-js/commit/868b4bdd36cca93287b21e18ebf9ebcb1885d344
>
> Currently in nqp-js I'm using JavaScript arrays as nqp arrays (with a bunch of methods monkey patched on top of them).
> That caused a problem as JavaScript alread has a push and unshift methods (hinting that it was somewhat inspired by Perl 5).
> The tests thus far where using the nqp::push op for adding elements to arrays.
> However QAST::Compiler::JavaScript uses the .push method
> Example: nqp::push(@foo,$value) vs @foo.push($value).
>
> My current calling convention is that $foo.bar(:a("named"),1) is translated to $foo.bar(ctx,{"a":"named"},1).
>
> Which ended up in strange things being added into arrays (Which resulted in some fun debugging).
>
>
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>
>


-- 
Jonathan "Duke" Leto <duke at leto.net>
Leto Labs LLC http://letolabs.com
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