ch12.031_best

来自「Perl Best Practices the source code」· 031_BEST 代码 · 共 30 行

##############################################################################
##   Code fragment (Recommended) from Chapter 12 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;

Readonly my $IDENT => qr/[A-Za-z]\w+/xms;

croak 'oops!' if 'set Foobar = {42}' !~

m{ 
    set          \s+  # Keyword
    ($IDENT)     \s*  # Name of file/option/mode
    =            \s*  # literal =
    \{                # literal {
    ([^\n]*)          # Value of file/option/mode
    \}                # literal }
}xms;