Proof of concept:
use strict;
use warnings;
use Data::Dump;
{
my %state;
sub till {
my @phases=@_;
my ($file,$line)= (caller)[1..2];
my $state = \$state{$file,$line};
$$state //= 0;
$phases[1+$$state]->($_);
if ($phases[$$state]) {
$$state += 2;
$$state %= @phases;
}
}
}
sub doStage1 { print "1: ",shift }
sub doStage2 { print "2: ",shift }
sub doStage3 { print "3: ",shift }
sub doOtherProcessing { print "*: ",shift }
while (<DATA>){
till (
- /for/ => \&doOtherProcessing,
- /their/ => \&doStage1,
- /fruit/ => \&doStage2,
- /lazy/ => \&doStage3,
);
}
__DATA__
now is the time
for all good men to
come to the aid of
their party.
Time flies like an arrow
fruit flies like a banana.
The quick red fox
jumps over the lazy
brown dog.
Etaoinshrdlu.
output:
*: now is the time
*: for all good men to
1: come to the aid of
1: their party.
2: Time flies like an arrow
2: fruit flies like a banana.
3: The quick red fox
3: jumps over the lazy
*: brown dog.
*: Etaoinshrdlu.
Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
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