ch03.015_best

来自「Perl Best Practices the source code」· 015_BEST 代码 · 共 44 行

##############################################################################
##   Code fragment (Recommended) from Chapter 3 of "Perl Best Practices"    ##
##     Copyright (c) O'Reilly & Associates, 2005. All Rights Reserved.      ##
##  See: http://www.oreilly.com/pub/a/oreilly/ask_tim/2001/codepolicy.html  ##
##############################################################################


# Standard modules...
use strict;
use warnings;
use IO::Prompt;
use Carp;
use English qw( -no_match_vars );
use Data::Alias;
use Readonly;

my $next_record;
my @metadata;

sub is_valid;
sub metadata_available_for;
sub has_end_tag;
 
my $loading_finished;
my $has_found_bad_record;
 
# and later...
 
if (is_valid($next_record) && !$loading_finished) {
    METADATA:
    while (metadata_available_for($next_record)) {
        push @metadata, get_metadata_for($next_record);
        last METADATA if has_end_tag($next_record);
    }
}
else {
    $has_found_bad_record = 1;
}


sub is_valid {}
sub metadata_available_for {}
sub has_end_tag {}