Hi Monks,

Just for curiosity I tried to use utf characters as subroutine names. My first attempt was using the Greek summa (Σ) as subroutine name. And it works well. Then I tried the integral sign (∫) and it just fails miserably. 

Illegal declaration of anonymous subroutine at ./utf-2.pl line 8 (#1)
    (F) When using the sub keyword to construct an anonymous subroutin
+e,
    you must always specify a block of code.  See perlsub.

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Could someone tell me what is the character set of a valid perl code?

Unfortunately utf encoded characters displayed as they were entered below, in the <code> section. My perl version is v5.26.2. 

#!/usr/local/bin/perl

use strict;
use warnings;
use utf8;
use open qw(:std :utf8);

#sub &#8747; # Integral, vim: insert mode ctrl-k In
#{
#    return 88;
#}

sub &#931;  # Summa, vim: insert mode ctrl-k S*
{
    my $sum;

    $sum += $_ for (@_);

    return $sum;
}

die "Usage: $0 4 3 6...\n" unless @ARGV;
print '&#931;: »', &#931;(@ARGV), "«\n";
#print '&#8747;: »', &#8747;(@ARGV), "«\n";

exit 0;

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In reply to UTF encoded subroutine names by pme

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