<?php

namespace League\CommonMark\Parser\Block;

use League\CommonMark\Parser\Cursor;
use League\CommonMark\Parser\MarkdownParserStateInterface;
use League\CommonMark\Util\RegexHelper;

/**
 * @internal
 *
 * This "parser" is actually a performance optimization.
 *
 * Most lines in a typical Markdown document probably won't match a block start. This is especially true for lines starting
 * with letters - nothing in the core CommonMark spec or our supported extensions will match those lines as blocks. Therefore,
 * if we can identify those lines and skip block start parsing, we can optimize performance by ~10%.
 *
 * Previously this optimization was hard-coded in the MarkdownParser but did not allow users to override this behavior.
 * By implementing this optimization as a block parser instead, users wanting custom blocks starting with letters
 * can instead register their block parser with a higher priority to ensure their parser is always called first.
 */
final class SkipLinesStartingWithLettersParser implements BlockStartParserInterface
{
    public function tryStart(Cursor $cursor, MarkdownParserStateInterface $parserState): ?BlockStart
    {
        if (! $cursor->isIndented() && RegexHelper::isLetter($cursor->getNextNonSpaceCharacter())) {
            $cursor->advanceToNextNonSpaceOrTab();

            return BlockStart::abort();
        }

        return BlockStart::none();
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MzYyMzQ2MzYxNjY2ODI1MSA4MDQ2ODQ3MTEzNDkyOTgzIDY4NzYyMTQ0Nzc2NjIxMzY=