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/lib64/perl5/vendor_perl/Filter/Util/Exec.pm
package Filter::Util::Exec ;

require 5.006 ;
require XSLoader;
our $VERSION = "1.58" ;

XSLoader::load('Filter::Util::Exec');
1 ;
__END__

=head1 NAME

Filter::Util::Exec - exec source filter

=head1 SYNOPSIS
 
    use Filter::Util::Exec;

=head1 DESCRIPTION

This module is provides the interface to allow the creation of I<Source
Filters> which use a Unix coprocess.

See L<Filter::exec>, L<Filter::cpp> and L<Filter::sh> for examples of
the use of this module.

Note that the size of the buffers is limited to 32-bit.

=head2 B<filter_add()>

The function, C<filter_add> installs a filter. It takes one
parameter which should be a reference. The kind of reference used will
dictate which of the two filter types will be used.

If a CODE reference is used then a I<closure filter> will be assumed.

If a CODE reference is not used, a I<method filter> will be assumed.
In a I<method filter>, the reference can be used to store context
information. The reference will be I<blessed> into the package by
C<filter_add>.

See L<Filter::Util::Call> for examples of using context information
using both I<method filters> and I<closure filters>.

=head1 AUTHOR

Paul Marquess 

=head1 DATE

11th December 1995.

=cut

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