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 sebastian/lines-of-code.
*
* (c) 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 SebastianBergmann\LinesOfCode;
use function array_merge;
use function array_unique;
use function assert;
use function count;
use PhpParser\Comment;
use PhpParser\Node;
use PhpParser\Node\Expr;
use PhpParser\NodeVisitorAbstract;
final class LineCountingVisitor extends NodeVisitorAbstract
{
/**
* @psalm-var non-negative-int
*/
private readonly int $linesOfCode;
/**
* @var Comment[]
*/
private array $comments = [];
/**
* @var int[]
*/
private array $linesWithStatements = [];
/**
* @psalm-param non-negative-int $linesOfCode
*/
public function __construct(int $linesOfCode)
{
$this->linesOfCode = $linesOfCode;
}
public function enterNode(Node $node): void
{
$this->comments = array_merge($this->comments, $node->getComments());
if (!$node instanceof Expr) {
return;
}
$this->linesWithStatements[] = $node->getStartLine();
}
public function result(): LinesOfCode
{
$commentLinesOfCode = 0;
foreach ($this->comments() as $comment) {
$commentLinesOfCode += ($comment->getEndLine() - $comment->getStartLine() + 1);
}
$nonCommentLinesOfCode = $this->linesOfCode - $commentLinesOfCode;
$logicalLinesOfCode = count(array_unique($this->linesWithStatements));
assert($commentLinesOfCode >= 0);
assert($nonCommentLinesOfCode >= 0);
assert($logicalLinesOfCode >= 0);
return new LinesOfCode(
$this->linesOfCode,
$commentLinesOfCode,
$nonCommentLinesOfCode,
$logicalLinesOfCode,
);
}
/**
* @return Comment[]
*/
private function comments(): array
{
$comments = [];
foreach ($this->comments as $comment) {
$comments[$comment->getStartLine() . '_' . $comment->getStartTokenPos() . '_' . $comment->getEndLine() . '_' . $comment->getEndTokenPos()] = $comment;
}
return $comments;
}
}