#! /usr/bin/perl
use warnings;
use strict;
use feature qw{ say };

{
    local $_ = 'foo';
    say '1 Start' if /\G foo/gcx;
    say '1 Mid'   if /\G .*/gcx;
    say '1 End'   if /\G \z/gcx;
}

{
    local $_ = 'foo';
    say '2 Start' if /\G foo/gcx;
    say '2 Mid'   if /\G .+/gcx;
    say '2 End'   if /\G \z/gcx;
}