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。 sh-3ll

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sh-3ll 1.0
DIR:/usr/local/share/perl5/XML/SAX/PurePerl/
Upload File :
Current File : //usr/local/share/perl5/XML/SAX/PurePerl/Exception.pm
# $Id$

package XML::SAX::PurePerl::Exception;

use strict;

use overload '""' => "stringify";

use vars qw/$StackTrace/;

$StackTrace = $ENV{XML_DEBUG} || 0;

sub throw {
    my $class = shift;
    die $class->new(@_);
}

sub new {
    my $class = shift;
    my %opts = @_;
    die "Invalid options" unless exists $opts{Message};
    
    if ($opts{reader}) {
        return bless { Message => $opts{Message},
                        Exception => undef, # not sure what this is for!!!
                        ColumnNumber => $opts{reader}->column,
                        LineNumber => $opts{reader}->line,
                        PublicId => $opts{reader}->public_id,
                        SystemId => $opts{reader}->system_id,
                        $StackTrace ? (StackTrace => stacktrace()) : (),
                    }, $class;
    }
    return bless { Message => $opts{Message},
                    Exception => undef, # not sure what this is for!!!
                  }, $class;
}

sub stringify {
    my $self = shift;
    local $^W;
    return $self->{Message} . " [Ln: " . $self->{LineNumber} . 
                ", Col: " . $self->{ColumnNumber} . "]" .
                ($StackTrace ? stackstring($self->{StackTrace}) : "") . "\n";
}

sub stacktrace {
    my $i = 2;
    my @fulltrace;
    while (my @trace = caller($i++)) {
        my %hash;
        @hash{qw(Package Filename Line)} = @trace[0..2];
        push @fulltrace, \%hash;
    }
    return \@fulltrace;
}

sub stackstring {
    my $stacktrace = shift;
    my $string = "\nFrom:\n";
    foreach my $current (@$stacktrace) {
        $string .= $current->{Filename} . " Line: " . $current->{Line} . "\n";
    }
    return $string;
}

1;