晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : //usr/share/doc/perl-constant/README
NAME

    constant - Perl pragma to declare constants


DESCRIPTION

    This pragma allows you to declare constants at compile-time.

    When a constant is used in an expression, Perl replaces it with its
    value at compile time, and may then optimize the expression further.
    In particular, any code in an "if (CONSTANT)" block will be optimized
    away if the constant is false.


INSTALLATION

    To install this module, run the following commands:

        perl Makefile.PL
        make
        make test
        make install

    Alternatively, to install with Module::Build, you can use the 
    following commands:

        perl Build.PL
        ./Build
        ./Build test
        ./Build install


SUPPORT AND DOCUMENTATION

    After installing, you can find documentation for this module with 
    the perldoc command.

        perldoc constant

    You can also look for information at:

        Search CPAN
            http://search.cpan.org/dist/constant

        CPAN Request Tracker:
            http://rt.cpan.org/Dist/Display.html?Name=constant

        AnnoCPAN, annotated CPAN documentation:
            http://annocpan.org/dist/constant

        CPAN Ratings:
            http://cpanratings.perl.org/d/constant


COPYRIGHT AND LICENCE

    Copyright (C) 1997, 1999 Tom Phoenix.

    This program is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.

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