As the others have said, that's not JSON, and it's unclear what Perl structure you would want to translate to a JS function. Could you show an example of such a Perl data structure, and the equivalent JavaScript that you expect to get?

Anyway, for WebPerl, I also looked into exactly this question and found that at least Cpanel::JSON::XS, and it seems the other JSON modules too, do not provide a good way to hook into the serialization to accomplish this. I ended up writing my own simple serializer. Something like this:

use warnings;
use strict;
use Cpanel::JSON::XS;

our $JSON = Cpanel::JSON::XS->new->allow_nonref;

sub to_js {
    my $what = shift;
    if (my $r = ref $what) {
        if ($r eq 'HASH') {
            return '{' . join(',',
                map { $JSON->encode("$_").':'.to_js($$what{$_}) }
                    sort keys %$what ) . '}';
        }
        elsif ($r eq 'ARRAY') {
            return '[' . join(',', map { to_js($_) } @$what) . ']';
        }
        elsif ($r eq 'CODE') {
            return 'function () { /* some JS here? */ }';
        }
        else { die "can't encode ref $r to JS" }
    }
    else { return $JSON->encode($what) }
}

print to_js( {
        foo => [ "bar", "quz" ],
        baz => sub {},
    } ), "\n";

__END__

{"baz":function () { /* some JS here? */ },"foo":["bar","quz"]}

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In reply to Re: Outputting JSON with function () {...} values by haukex
in thread Outputting JSON with function () {...} values by cosmicperl

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