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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<?php declare(strict_types = 1);
namespace PharIo\Version;
class VersionConstraintValue {
/** @var VersionNumber */
private $major;
/** @var VersionNumber */
private $minor;
/** @var VersionNumber */
private $patch;
/** @var string */
private $label = '';
/** @var string */
private $buildMetaData = '';
/** @var string */
private $versionString = '';
public function __construct(string $versionString) {
$this->versionString = $versionString;
$this->parseVersion($versionString);
}
public function getLabel(): string {
return $this->label;
}
public function getBuildMetaData(): string {
return $this->buildMetaData;
}
public function getVersionString(): string {
return $this->versionString;
}
public function getMajor(): VersionNumber {
return $this->major;
}
public function getMinor(): VersionNumber {
return $this->minor;
}
public function getPatch(): VersionNumber {
return $this->patch;
}
private function parseVersion(string $versionString): void {
$this->extractBuildMetaData($versionString);
$this->extractLabel($versionString);
$this->stripPotentialVPrefix($versionString);
$versionSegments = \explode('.', $versionString);
$this->major = new VersionNumber(\is_numeric($versionSegments[0]) ? (int)$versionSegments[0] : null);
$minorValue = isset($versionSegments[1]) && \is_numeric($versionSegments[1]) ? (int)$versionSegments[1] : null;
$patchValue = isset($versionSegments[2]) && \is_numeric($versionSegments[2]) ? (int)$versionSegments[2] : null;
$this->minor = new VersionNumber($minorValue);
$this->patch = new VersionNumber($patchValue);
}
private function extractBuildMetaData(string &$versionString): void {
if (\preg_match('/\+(.*)/', $versionString, $matches) === 1) {
$this->buildMetaData = $matches[1];
$versionString = \str_replace($matches[0], '', $versionString);
}
}
private function extractLabel(string &$versionString): void {
if (\preg_match('/-(.*)/', $versionString, $matches) === 1) {
$this->label = $matches[1];
$versionString = \str_replace($matches[0], '', $versionString);
}
}
private function stripPotentialVPrefix(string &$versionString): void {
if ($versionString[0] !== 'v') {
return;
}
$versionString = \substr($versionString, 1);
}
}