ch09.001_prob

来自「Perl Best Practices the source code」· 001_PROB 代码 · 共 33 行

##############################################################################
## Code fragment (NOT RECOMMENDED) from Chapter 9 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 $input = "2345";

Readonly my $INTEGER    => 1;
Readonly my $ROUND_ZERO => 1;

sub coerce;
 
# and later...
 
my $expected_count = coerce $input, $INTEGER, $ROUND_ZERO; 



sub coerce {
    return 1;
}