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<?php |
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declare(strict_types=1); |
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/* |
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* This file is part of the league/commonmark package. |
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* |
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* (c) Colin O'Dell <[email protected]> |
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* |
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* Original code based on the CommonMark JS reference parser (https://bitly.com/commonmark-js) |
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* - (c) John MacFarlane |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace League\CommonMark\Extension\CommonMark\Parser\Inline; |
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use League\CommonMark\Extension\CommonMark\Node\Inline\Code; |
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use League\CommonMark\Node\Inline\Text; |
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use League\CommonMark\Parser\Inline\InlineParserInterface; |
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use League\CommonMark\Parser\InlineParserContext; |
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final class BacktickParser implements InlineParserInterface |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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2496 |
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public function getCharacters(): array |
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{ |
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2496 |
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return ['`']; |
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} |
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150 |
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public function parse(InlineParserContext $inlineContext): bool |
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{ |
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$cursor = $inlineContext->getCursor(); |
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150 |
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$ticks = $cursor->match('/^`+/'); |
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if ($ticks === null) { |
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return false; // This should never happen |
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} |
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150 |
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$currentPosition = $cursor->getPosition(); |
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150 |
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$previousState = $cursor->saveState(); |
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150 |
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while ($matchingTicks = $cursor->match('/`+/m')) { |
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if ($matchingTicks !== $ticks) { |
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continue; |
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} |
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$code = $cursor->getSubstring($currentPosition, $cursor->getPosition() - $currentPosition - \strlen($ticks)); |
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$c = \preg_replace('/\n/m', ' ', $code) ?? ''; |
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if ( |
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! empty($c) && |
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$c[0] === ' ' && |
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\substr($c, -1, 1) === ' ' && |
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\preg_match('/[^ ]/', $c) |
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) { |
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$c = \substr($c, 1, -1); |
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} |
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$inlineContext->getContainer()->appendChild(new Code($c)); |
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return true; |
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} |
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// If we got here, we didn't match a closing backtick sequence |
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$cursor->restoreState($previousState); |
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$inlineContext->getContainer()->appendChild(new Text($ticks)); |
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return true; |
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} |
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} |
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thephpleague /
commonmark
PHP Analyzer performs a side-effects analysis of your code. A side-effect is basically anything that might be visible after the scope of the method is left.
Let’s take a look at an example:
If we look at the
getEmail()method, we can see that it has no side-effect. Whether you call this method or not, no future calls to other methods are affected by this. As such code as the following is useless:On the hand, if we look at the
setEmail(), this method _has_ side-effects. In the following case, we could not remove the method call: