use strict;
use warnings;
use Data::Dumper;
my @AoH ;
my $current_hash = {};
while (<DATA>){
	chomp $_;
	if ( $_ =~ /objet => debut$/ .. /objet => fin$/){
		if ( /objet => debut$/ ){
			next;
		}
		elsif ( /objet => fin$/ ){
			push @AoH, $current_hash;
			$current_hash = {};
		}
		else{
			my ($key,$value) = split /\s+=>\s+/,$_;
			$current_hash->{ $key } = $value;
		}
	}
	else{
		print "unxpected content outside tags in line: [$_]\n";
	}
}
print Dumper \@AoH;
__DATA__
objet => debut
index => 1
a => "premiere valeur"
z => "dernier mot"
objet => fin
ALIEN LINE AFTER fin
objet => debut
index => 77
a => "autre valeur"
z => "aurai-je le dernier mot ?"
objet => fin

##</code><code>##

unxpected content outside tags in line: [ALIEN LINE AFTER fin]
$VAR1 = [
          {
            'a' => '"premiere valeur"',
            'index' => '1',
            'z' => '"dernier mot"'
          },
          {
            'z' => '"aurai-je le dernier mot ?"',
            'a' => '"autre valeur"',
            'index' => '77'
          }
        ];