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　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。 . Prv8 Shell

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#!/usr/bin/perl
use strict;
use warnings;

=head1 TEST PURPOSE

These tests test option list expansion (from an option list into a hashref).

=cut

use Sub::Install;
use Test::More tests => 13;

BEGIN { use_ok('Data::OptList'); }

# let's get a convenient copy to use:
Sub::Install::install_sub({
  code => 'mkopt_hash',
  from => 'Data::OptList',
  as   => 'OPTH',
});

is_deeply(
  OPTH(),
  {},
  "empty opt list expands properly",
);

is_deeply(
  OPTH(undef),
  {},
  "undef opt list expands properly",
);

is_deeply(
  OPTH([]),
  {},
  "empty arrayref opt list expands properly",
);

is_deeply(
  OPTH({}),
  {},
  "empty hashref opt list expands properly",
);

is_deeply(
  OPTH([ qw(foo bar baz) ]),
  { foo => undef, bar => undef, baz => undef },
  "opt list of just names expands",
);

is_deeply(
  OPTH([ qw(foo :bar baz) ]),
  { foo => undef, ':bar' => undef, baz => undef },
  "opt list of names expands with :group names",
);

is_deeply(
  OPTH([ foo => { a => 1 }, ':bar', 'baz' ]),
  { foo => { a => 1 }, ':bar' => undef, baz => undef },
  "opt list of names and values expands",
);

is_deeply(
  OPTH([ foo => { a => 1 }, ':bar' => undef, 'baz' ]),
  { foo => { a => 1 }, ':bar' => undef, baz => undef },
  "opt list of names and values expands, ignoring undef",
);

is_deeply(
  OPTH({ foo => { a => 1 }, -bar => undef, baz => undef }, 0, 'HASH'),
  { foo => { a => 1 }, -bar => undef, baz => undef },
  "opt list of names and values expands with must_be",
);

is_deeply(
  OPTH({ foo => { a => 1 }, -bar => undef, baz => undef }, 0, ['HASH']),
  { foo => { a => 1 }, -bar => undef, baz => undef },
  "opt list of names and values expands with [must_be]",
);

eval { OPTH({ foo => { a => 1 }, -bar => undef, baz => undef }, 0, 'ARRAY'); };
like($@, qr/HASH-ref values are not/, "exception tossed on invaild ref value");

eval { OPTH({ foo => { a => 1 }, -bar => undef, baz => undef }, 0, ['ARRAY']); };
like($@, qr/HASH-ref values are not/, "exception tossed on invaild ref value");

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