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<HTML><HEAD><TITLE>Recipe 12.18. Example: Module Template (Perl Cookbook)</TITLE><METANAME="DC.title"CONTENT="Perl Cookbook"><METANAME="DC.creator"CONTENT="Tom Christiansen & Nathan Torkington"><METANAME="DC.publisher"CONTENT="O'Reilly & Associates, Inc."><METANAME="DC.date"CONTENT="1999-07-02T01:42:05Z"><METANAME="DC.type"CONTENT="Text.Monograph"><METANAME="DC.format"CONTENT="text/html"SCHEME="MIME"><METANAME="DC.source"CONTENT="1-56592-243-3"SCHEME="ISBN"><METANAME="DC.language"CONTENT="en-US"><METANAME="generator"CONTENT="Jade 1.1/O'Reilly DocBook 3.0 to HTML 4.0"><LINKREV="made"HREF="mailto:online-books@oreilly.com"TITLE="Online Books Comments"><LINKREL="up"HREF="ch12_01.htm"TITLE="12. Packages, Libraries, and Modules"><LINKREL="prev"HREF="ch12_18.htm"TITLE="12.17. Building and Installing a CPAN Module"><LINKREL="next"HREF="ch12_20.htm"TITLE="12.19. Program: Finding Versions and Descriptions of Installed Modules"></HEAD><BODYBGCOLOR="#FFFFFF"><img alt="Book Home" border="0" src="gifs/smbanner.gif" usemap="#banner-map" /><map name="banner-map"><area shape="rect" coords="1,-2,616,66" href="index.htm" alt="Perl Cookbook"><area shape="rect" coords="629,-11,726,25" href="jobjects/fsearch.htm" alt="Search this book" /></map><div class="navbar"><p><TABLEWIDTH="684"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="228"><ACLASS="sect1"HREF="ch12_18.htm"TITLE="12.17. Building and Installing a CPAN Module"><IMGSRC="../gifs/txtpreva.gif"ALT="Previous: 12.17. Building and Installing a CPAN Module"BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="228"><B><FONTFACE="ARIEL,HELVETICA,HELV,SANSERIF"SIZE="-1"><ACLASS="chapter"REL="up"HREF="ch12_01.htm"TITLE="12. Packages, Libraries, and Modules"></A></FONT></B></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="228"><ACLASS="sect1"HREF="ch12_20.htm"TITLE="12.19. Program: Finding Versions and Descriptions of Installed Modules"><IMGSRC="../gifs/txtnexta.gif"ALT="Next: 12.19. Program: Finding Versions and Descriptions of Installed Modules"BORDER="0"></A></TD></TR></TABLE></DIV><DIVCLASS="sect1"><H2CLASS="sect1"><ACLASS="title"NAME="ch12-32950">12.18. Example: Module Template</A></H2><PCLASS="para"><ACLASS="indexterm"NAME="ch12-idx-1000005317-0"></A><ACLASS="indexterm"NAME="ch12-idx-1000005317-1"></A>Following is the skeleton of a module. If you want to write a module of your own, you can copy this and customize it.</P><PRECLASS="programlisting">package Some::Module; # must live in Some/Module.pmuse strict;require Exporter;use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);# set the version for version checking$VERSION = 0.01;@ISA = qw(Exporter);@EXPORT = qw(&func1 &func2 &func4);%EXPORT_TAGS = ( ); # eg: TAG => [ qw!name1 name2! ],# your exported package globals go here,# as well as any optionally exported functions@EXPORT_OK = qw($Var1 %Hashit &func3);use vars qw($Var1 %Hashit);# non-exported package globals go hereuse vars qw(@more $stuff);# initialize package globals, first exported ones$Var1 = '';%Hashit = ();# then the others (which are still accessible as $Some::Module::stuff)$stuff = '';@more = ();# all file-scoped lexicals must be created before# the functions below that use them.# file-private lexicals go heremy $priv_var = '';my %secret_hash = ();# here's a file-private function as a closure,# callable as &$priv_func.my $priv_func = sub { # stuff goes here.};# make all your functions, whether exported or not;# remember to put something interesting in the {} stubssub func1 { .... } # no prototypesub func2() { .... } # proto'd voidsub func3($$) { .... } # proto'd to 2 scalars# this one isn't auto-exported, but could be called!sub func4(\%) { .... } # proto'd to 1 hash refEND { } # module clean-up code here (global destructor)1;<ACLASS="indexterm"NAME="ch12-idx-1000005319-0"></A><ACLASS="indexterm"NAME="ch12-idx-1000005319-1"></A></PRE></DIV><DIVCLASS="htmlnav"><P></P><HRALIGN="LEFT"WIDTH="684"TITLE="footer"><TABLEWIDTH="684"BORDER="0"CELLSPACING="0"CELLPADDING="0"><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="228"><ACLASS="sect1"HREF="ch12_18.htm"TITLE="12.17. Building and Installing a CPAN Module"><IMGSRC="../gifs/txtpreva.gif"ALT="Previous: 12.17. Building and Installing a CPAN Module"BORDER="0"></A></TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="228"><ACLASS="book"HREF="index.htm"TITLE="Perl Cookbook"><IMGSRC="../gifs/txthome.gif"ALT="Perl Cookbook"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="228"><ACLASS="sect1"HREF="ch12_20.htm"TITLE="12.19. Program: Finding Versions and Descriptions of Installed Modules"><IMGSRC="../gifs/txtnexta.gif"ALT="Next: 12.19. Program: Finding Versions and Descriptions of Installed Modules"BORDER="0"></A></TD></TR><TR><TDALIGN="LEFT"VALIGN="TOP"WIDTH="228">12.17. Building and Installing a CPAN Module</TD><TDALIGN="CENTER"VALIGN="TOP"WIDTH="228"><ACLASS="index"HREF="index/index.htm"TITLE="Book Index"><IMGSRC="../gifs/index.gif"ALT="Book Index"BORDER="0"></A></TD><TDALIGN="RIGHT"VALIGN="TOP"WIDTH="228">12.19. Program: Finding Versions and Descriptions of Installed Modules</TD></TR></TABLE><HRALIGN="LEFT"WIDTH="684"TITLE="footer"><FONTSIZE="-1"></DIV<!-- LIBRARY NAV BAR --> <img src="../gifs/smnavbar.gif" usemap="#library-map" border="0" alt="Library Navigation Links"><p> <a href="copyrght.htm">Copyright © 2002</a> O'Reilly & Associates. All rights reserved.</font> </p> <map name="library-map"> <area shape="rect" coords="1,0,85,94" href="../index.htm"><area shape="rect" coords="86,1,178,103" href="../lwp/index.htm"><area shape="rect" coords="180,0,265,103" href="../lperl/index.htm"><area shape="rect" coords="267,0,353,105" href="../perlnut/index.htm"><area shape="rect" coords="354,1,446,115" href="../prog/index.htm"><area shape="rect" coords="448,0,526,132" href="../tk/index.htm"><area shape="rect" coords="528,1,615,119" href="../cookbook/index.htm"><area shape="rect" coords="617,0,690,135" href="../pxml/index.htm"></map> </BODY></HTML>⌨️ 快捷键说明
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