Re: Trying to use Perl5 modules (documented on wiki)
Audrey Tang wrote: > > 在 Sep 11, 2006 2:07 PM 時，Trey Harris 寫到： > >> In a message dated Mon, 11 Sep 2006, Richard Hainsworth writes: >>> I am trying to find out how to use (in perl6) perl5 modules that >>> contain subroutines. >> >> Imports from Perl 5 modules don't currently work. > > Actually, explicit imports do work (as of a couple weeks ago): > > use perl5:Time::gmtime ; > say gmtime.wday; > > Implicit imports is not yet supported, though... Thanks for the status update. I've reflected this on the related wiki page: http://rakudo.org/perl6/index.cgi?using_perl_5_embedding I welcome other tips about Perl 5 embedding to also appear there! Mark
Re: Trying to use Perl5 modules
在 Sep 11, 2006 2:07 PM 時，Trey Harris 寫到： In a message dated Mon, 11 Sep 2006, Richard Hainsworth writes: I am trying to find out how to use (in perl6) perl5 modules that contain subroutines. Imports from Perl 5 modules don't currently work. Actually, explicit imports do work (as of a couple weeks ago): use perl5:Time::gmtime ; say gmtime.wday; Implicit imports is not yet supported, though... Audrey
Re: Trying to use Perl5 modules
Where is .can documented?
I saw .can in one of the examples in the pugs distribution, but I didnt
know where it came from, viz., was it related to perl6 or the module
that had been imported.
Not quite sure how the following two statements can be consistent:
'imports from Perl5 modules dont work' and 'there is a workaround with
.can'. From the code examples below, .can seems to be importing the
methods from the modules.
If .can is a universal workaround, then surely a pugs wrapper could be
written for any perl5 module along the lines
use v6-alpha;
use perl5:SomeModule::SomeSubModule;
our &aPublicSub := SomeModule::SomeSubModule.can('aPublicSub');
and so on for all the sub's in the module.
Regards,
Richard
Trey Harris wrote:
In a message dated Mon, 11 Sep 2006, Richard Hainsworth writes:
I am trying to find out how to use (in perl6) perl5 modules that
contain subroutines.
Imports from Perl 5 modules don't currently work.
You can workaround this using .can, see below.
use perl5:Time::gmtime;
my $gm = gmtime();
printf "The day in Greenwich is %s\n",
(qw(Sun Mon Tue Wed Thu Fri Sat Sun))[ $gm.wday() ];
# note the change from -> to .
use v6-alpha;
use perl5:Time::gmtime;
our &gmtime := Time::gmtime.can('gmtime');
my $gm = gmtime();
say "The day in Greenwich is {()[ $gm.wday ] }";
There is no printf. You can use a string closure as above, or
say/print with sprintf.
The same goes for your other example:
use perl5:Text::Balanced qw(extract_tagged);
my $txt = 'now and thensome text';
my @ret_pars = extract_tagged($txt); # this is line 8
print join("\n",@ret_pars),"\n";
#print "[EMAIL PROTECTED]" if $@;
# commented this out as caused a compile error, probably another
# variable should be used for errors.
use perl5:Text::Balanced;
our &extract_tagged := Text::Balanced.can('extract_tagged');
my $txt = 'now and thensome text';
my @ret_pars = extract_tagged($txt); # this is line 8
.say for @ret_pars;
say $! if $!;
$@ is no more, it's $! for all errors whatever their provender. In
this case there's no need for a join, but you could have written it:
say @ret_pars.join("\n");
if you liked.
All that said, there's a problem with Text::Balanced running under
pugs; @ret_pars is reversed from what it should be. I'm not sure
what's going on.
Trey
Re: Trying to use Perl5 modules
In a message dated Mon, 11 Sep 2006, Richard Hainsworth writes:
I am trying to find out how to use (in perl6) perl5 modules that contain
subroutines.
Imports from Perl 5 modules don't currently work.
You can workaround this using .can, see below.
use perl5:Time::gmtime;
my $gm = gmtime();
printf "The day in Greenwich is %s\n",
(qw(Sun Mon Tue Wed Thu Fri Sat Sun))[ $gm.wday() ];
# note the change from -> to .
use v6-alpha;
use perl5:Time::gmtime;
our &gmtime := Time::gmtime.can('gmtime');
my $gm = gmtime();
say "The day in Greenwich is {()[ $gm.wday ] }";
There is no printf. You can use a string closure as above, or
say/print with sprintf.
The same goes for your other example:
use perl5:Text::Balanced qw(extract_tagged);
my $txt = 'now and thensome text';
my @ret_pars = extract_tagged($txt); # this is line 8
print join("\n",@ret_pars),"\n";
#print "[EMAIL PROTECTED]" if $@;
# commented this out as caused a compile error, probably another
# variable should be used for errors.
use perl5:Text::Balanced;
our &extract_tagged := Text::Balanced.can('extract_tagged');
my $txt = 'now and thensome text';
my @ret_pars = extract_tagged($txt); # this is line 8
.say for @ret_pars;
say $! if $!;
$@ is no more, it's $! for all errors whatever their provender. In this
case there's no need for a join, but you could have written it:
say @ret_pars.join("\n");
if you liked.
All that said, there's a problem with Text::Balanced running under pugs;
@ret_pars is reversed from what it should be. I'm not sure what's going
on.
Trey
Trying to use Perl5 modules
I am trying to find out how to use (in perl6) perl5 modules that contain
subroutines.
Here are two scripts from standard modules. Both work in perl5, but I
cant find a way to use them using pugs (I am using the Debian package
with version 6.2.10-4build1 on GNU/Linux/Ubuntu)
use strict;
use Time::gmtime;
my $gm = gmtime();
printf "The day in Greenwich is %s\n",
(qw(Sun Mon Tue Wed Thu Fri Sat Sun))[ $gm->wday() ];
$ perl ./p5test.pl
Tue
use perl5:Time::gmtime;
my $gm = gmtime();
printf "The day in Greenwich is %s\n",
(qw(Sun Mon Tue Wed Thu Fri Sat Sun))[ $gm.wday() ];
# note the change from -> to .
$ pugs ./p5test.p6
*** No compatible subroutine found: "&gmtime"
at ./p5test.p6 line 6, column 10-18
use strict;
use Text::Balanced qw(extract_tagged);
my $txt = 'now and thensome text';
my @ret_pars = extract_tagged($txt);
print join("\n",@ret_pars),"\n";
print "[EMAIL PROTECTED]" if $@;
$ perl ./p5test.pl
now and then
some text
now and then
use perl5:Text::Balanced qw(extract_tagged);
my $txt = 'now and thensome text';
my @ret_pars = extract_tagged($txt); # this is line 8
print join("\n",@ret_pars),"\n";
#print "[EMAIL PROTECTED]" if $@;
# commented this out as caused a compile error, probably another
# variable should be used for errors.
$ pugs ./p5test.p6
*** No compatible subroutine found: "&extract_tagged"
at ./p5test.p6 line 5, column 16-36
What is going wrong? What have I done wrong? I tried several
alternatives, like putting the & sigil on the function. I just got
different sorts of errors.
Richard
