[I just realized I sent this directly to Daniel rather than to the
list, so for the benefit of onlookers...]
On Jun 6, 2009, at 1:51 PM, Daniel Carrera wrote:
Daniel Ruoso wrote:
Yes... that's what wasn't implemented... But now it is ;)
http://sial.org/pbot/37085
Close, but...
% perl6 rpn.
On Jun 6, 2009, at 10:32 AM, Richard Hainsworth wrote:
rule element {
'<' *
[
| '/>'
| '>' * ' '>'
]
}
This is just a wild, uneducated, possibly delusional guess, but I
don't think that vertical bar before the '/>' should be there. I
think it might be causing the grammar engine to check w
Daniel Ruoso wrote:
Are you planning to write a post explaining how your program works?
Maybe, but if you want to beat me to it, feel free ;)
I figure that the explanation is as useful as the example. I sure
spent a lot of time writing the blog post.
I'm not sure I'll have the time to write
Daniel Ruoso wrote:
Yes... that's what wasn't implemented... But now it is ;)
http://sial.org/pbot/37085
Close, but...
% perl6 rpn.pl "5 4 + 3 / 5 3 - *"
-6
That should be a positive 6.
Are you planning to write a post explaining how your program works? I
figure that the explanation is as
Daniel Ruoso wrote:
You can probably fix that with a different split() line. I tried using
instead of \s+ but the program just hangs forever.
Hmm.. it certainly is in the split, I'm not sure how to get the barrier
between the 2 and the +
Does Perl 6 still have the word barrier \b regex?
Daniel Carrera wrote
Ok, try again:
% perl6 rpn.pl "2 2+"
2 2
You can probably fix that with a different split() line. I tried using
instead of \s+ but the program just hangs forever.
I also tried a more complex expression, and the calculator didn't like it:
% perl6 rpn.pl "5 4 + 3 / 5 3
Daniel Carrera wrote:
http://sial.org/pbot/37075
% perl rpn.pl "2 2 +"
Tee hee... that should have been "perl6". :-)
Ok, try again:
% perl6 rpn.pl "2 2+"
2 2
Daniel Ruoso wrote:
TIMTOWTDI ;)
The objective of the blog was more about the learning + teaching
experience than anything else.
http://sial.org/pbot/37075
% perl rpn.pl "2 2 +"
Semicolon seems to be missing at rpn.pl line 2.
String found where operator expected at rpn.pl line 13, near
Leon Timmermans wrote:
If you want to write a fast parser for XML, preventing backtracking is
going to be quite essential. I suspect the problem is your grammar,
not the grammar engine itself. You could post it to perl6-users and
ask for advice on it.
Leon
Below is the grammar.
I am only inte
Hi all,
I just wrote a blog post showing how to make a reverse polish notation
calculator in Perl 6. In the process I show some of Perl 6's grammar
features.
Someone in IRC thought it was good, so I decided to post here in the off
chance that someone else finds it interesting or useful.
ht
Larry wrote:
» Indeed, that preference is why Perl 6 can (we hope) get away with
» autochomping, where Perl 5 can't (as easily). Or more accurately,
» we choose not to special-case "while (<>)" as Perl 5 does (because
» even Perl 5 has difficulties with files that are accidentally
» "autochomped"
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