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);
/*
* This file is part of PharIo\Version.
*
* (c) Arne Blankerts <arne@blankerts.de>, Sebastian Heuer <sebastian@phpeople.de>, Sebastian Bergmann <sebastian@phpunit.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace PharIo\Version;
class Version {
/** @var string */
private $originalVersionString;
/** @var VersionNumber */
private $major;
/** @var VersionNumber */
private $minor;
/** @var VersionNumber */
private $patch;
/** @var null|PreReleaseSuffix */
private $preReleaseSuffix;
/** @var null|BuildMetaData */
private $buildMetadata;
public function __construct(string $versionString) {
$this->ensureVersionStringIsValid($versionString);
$this->originalVersionString = $versionString;
}
/**
* @throws NoPreReleaseSuffixException
*/
public function getPreReleaseSuffix(): PreReleaseSuffix {
if ($this->preReleaseSuffix === null) {
throw new NoPreReleaseSuffixException('No pre-release suffix set');
}
return $this->preReleaseSuffix;
}
public function getOriginalString(): string {
return $this->originalVersionString;
}
public function getVersionString(): string {
$str = \sprintf(
'%d.%d.%d',
$this->getMajor()->getValue() ?? 0,
$this->getMinor()->getValue() ?? 0,
$this->getPatch()->getValue() ?? 0
);
if (!$this->hasPreReleaseSuffix()) {
return $str;
}
return $str . '-' . $this->getPreReleaseSuffix()->asString();
}
public function hasPreReleaseSuffix(): bool {
return $this->preReleaseSuffix !== null;
}
public function equals(Version $other): bool {
if ($this->getVersionString() !== $other->getVersionString()) {
return false;
}
if ($this->hasBuildMetaData() !== $other->hasBuildMetaData()) {
return false;
}
if ($this->hasBuildMetaData() && $other->hasBuildMetaData() &&
!$this->getBuildMetaData()->equals($other->getBuildMetaData())) {
return false;
}
return true;
}
public function isGreaterThan(Version $version): bool {
if ($version->getMajor()->getValue() > $this->getMajor()->getValue()) {
return false;
}
if ($version->getMajor()->getValue() < $this->getMajor()->getValue()) {
return true;
}
if ($version->getMinor()->getValue() > $this->getMinor()->getValue()) {
return false;
}
if ($version->getMinor()->getValue() < $this->getMinor()->getValue()) {
return true;
}
if ($version->getPatch()->getValue() > $this->getPatch()->getValue()) {
return false;
}
if ($version->getPatch()->getValue() < $this->getPatch()->getValue()) {
return true;
}
if (!$version->hasPreReleaseSuffix() && !$this->hasPreReleaseSuffix()) {
return false;
}
if ($version->hasPreReleaseSuffix() && !$this->hasPreReleaseSuffix()) {
return true;
}
if (!$version->hasPreReleaseSuffix() && $this->hasPreReleaseSuffix()) {
return false;
}
return $this->getPreReleaseSuffix()->isGreaterThan($version->getPreReleaseSuffix());
}
public function getMajor(): VersionNumber {
return $this->major;
}
public function getMinor(): VersionNumber {
return $this->minor;
}
public function getPatch(): VersionNumber {
return $this->patch;
}
/**
* @psalm-assert-if-true BuildMetaData $this->buildMetadata
* @psalm-assert-if-true BuildMetaData $this->getBuildMetaData()
*/
public function hasBuildMetaData(): bool {
return $this->buildMetadata !== null;
}
/**
* @throws NoBuildMetaDataException
*/
public function getBuildMetaData(): BuildMetaData {
if (!$this->hasBuildMetaData()) {
throw new NoBuildMetaDataException('No build metadata set');
}
return $this->buildMetadata;
}
/**
* @param string[] $matches
*
* @throws InvalidPreReleaseSuffixException
*/
private function parseVersion(array $matches): void {
$this->major = new VersionNumber((int)$matches['Major']);
$this->minor = new VersionNumber((int)$matches['Minor']);
$this->patch = isset($matches['Patch']) ? new VersionNumber((int)$matches['Patch']) : new VersionNumber(0);
if (isset($matches['PreReleaseSuffix']) && $matches['PreReleaseSuffix'] !== '') {
$this->preReleaseSuffix = new PreReleaseSuffix($matches['PreReleaseSuffix']);
}
if (isset($matches['BuildMetadata'])) {
$this->buildMetadata = new BuildMetaData($matches['BuildMetadata']);
}
}
/**
* @param string $version
*
* @throws InvalidVersionException
*/
private function ensureVersionStringIsValid($version): void {
$regex = '/^v?
(?P<Major>0|[1-9]\d*)
\\.
(?P<Minor>0|[1-9]\d*)
(\\.
(?P<Patch>0|[1-9]\d*)
)?
(?:
-
(?<PreReleaseSuffix>(?:(dev|beta|b|rc|alpha|a|patch|p|pl)\.?\d*))
)?
(?:
\\+
(?P<BuildMetadata>[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-@]+)*)
)?
$/xi';
if (\preg_match($regex, $version, $matches) !== 1) {
throw new InvalidVersionException(
\sprintf("Version string '%s' does not follow SemVer semantics", $version)
);
}
$this->parseVersion($matches);
}
}