On Fri, 2002-09-06 at 09:29, Nicholas Clark wrote:
> On Fri, Sep 06, 2002 at 01:34:56AM -0400, Aaron Sherman wrote:
>
> > # INTERNAL q, qq, qw
> > # XXX - how do I do quote-like operators? I know I saw someone say...
> > # Need to do: qr (NEVER("qr")) and qx
>
> presumably the way the perl5 tokeniser does them - by parsing the string
> into a series of concatenated constants and variables, with some optionally
> fed through uc/ucfirst/lc/lcfirst/quotemeta
> (And scalar and list interpolators breaking back out to the real parser)
Ok, so I guess that all has to go in the parser, not the builtins. Perl
5 already provides builtin functions that are the back-ends for things
like C<< <> >>, C<qx>, etc so those will be in the builtins, and the
parser can just call them. It may already do so, I've not had time to
look.
> > sub chomp($string is rw){
> > my $irs = ${"/"}; # XXX What is $/ now?
>
> per file handle. So does that mean each string needs a property to hold what
> the record separator for the file handle it was read from at the time of
> reading?
That's not terribly useful, since filehandles will auto-chomp in Perl 6
anyway. I propose the alternate:
sub chomp($string is rw, $sep //= rx/\n/) { ... }
sub chomp(@strings is rw, $sep //= rx/\n/) { ... }
This will mean that you can:
chomp(@lines=<>)
but not:
chomp($line1, $line2, $line3);
Is that going to be a problem?
> (Well, as record separators could be regexps^Wpatterns actually I think a
> an offset to the start of the record separator will do)
I forgot they could be patterns. Need to go fix that!
> > sub index($string, $substr, int $pos //= 0) {
> > # XXX - slow dumb way... need to break out Knuth
[...]
> I think that string in string searches are common functionality that ought
> to be implemented in the parrot core. Rather than every language and
> extension that needs them having to re-implement the wheel.
Good point. I will look at what parrot does now, and consider moving
index over to the Internal section.
> Why is socketpair never? It's a real Unix system call that provides
Because I was tired :)
I'm going to cut that section down to just a list of the functions that
need to be moved over to the IO modules as one long comment. It's just
there for a reminder right now.
Thanks for the comments and answers to some of my questions. The
feedback as been quite helpful!
