use strict;
use warnings;

use re q{eval};

my $word = q{test};
my $rxWord = qr{\b$word\b};

# This is the one the does the work.
#
my $rxWordPos = qr{\b($word)\b(?{print $-[0], q{ }})};

while (<DATA>)
{
    next unless m{$rxWord};
    print qq{Match found on line $., column };

    while (m{$rxWordPos}g) {;}

    print qq{\n};
}

__END__
This is a test from tester okay
nothing
message test center test
test in proress ... test one test two
a tester in this line

##</code><code>##

Match found on line 1, column 10 
Match found on line 3, column 8 20 
Match found on line 4, column 0 20 29 

##</code><code>##

use strict;
use warnings;

my $word = q{test};
my $rxWord = qr{\b($word)\b};

while (<DATA>)
{
    next unless m{$rxWord};
    print qq{Match found on line $., column };
    while (m{$rxWord}g)
    {
        print qq{$-[0] };
    }
    print qq{\n};
}

__END__
This is a test from tester okay
nothing
message test center test
test in proress ... test one test two
a tester in this line