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Edit File: Lexer.php

<?php declare(strict_types = 1);

namespace PHPStan\PhpDocParser\Lexer;

/**
 * Implementation based on Nette Tokenizer (New BSD License; https://github.com/nette/tokenizer)
 */
class Lexer
{

public const TOKEN_REFERENCE = 0;
	public const TOKEN_UNION = 1;
	public const TOKEN_INTERSECTION = 2;
	public const TOKEN_NULLABLE = 3;
	public const TOKEN_OPEN_PARENTHESES = 4;
	public const TOKEN_CLOSE_PARENTHESES = 5;
	public const TOKEN_OPEN_ANGLE_BRACKET = 6;
	public const TOKEN_CLOSE_ANGLE_BRACKET = 7;
	public const TOKEN_OPEN_SQUARE_BRACKET = 8;
	public const TOKEN_CLOSE_SQUARE_BRACKET = 9;
	public const TOKEN_OPEN_CURLY_BRACKET = 30;
	public const TOKEN_CLOSE_CURLY_BRACKET = 31;
	public const TOKEN_COMMA = 10;
	public const TOKEN_COLON = 29;
	public const TOKEN_VARIADIC = 11;
	public const TOKEN_DOUBLE_COLON = 12;
	public const TOKEN_DOUBLE_ARROW = 13;
	public const TOKEN_EQUAL = 14;
	public const TOKEN_OPEN_PHPDOC = 15;
	public const TOKEN_CLOSE_PHPDOC = 16;
	public const TOKEN_PHPDOC_TAG = 17;
	public const TOKEN_PHPDOC_EOL = 26;
	public const TOKEN_FLOAT = 18;
	public const TOKEN_INTEGER = 19;
	public const TOKEN_SINGLE_QUOTED_STRING = 20;
	public const TOKEN_DOUBLE_QUOTED_STRING = 21;
	public const TOKEN_IDENTIFIER = 22;
	public const TOKEN_THIS_VARIABLE = 23;
	public const TOKEN_VARIABLE = 24;
	public const TOKEN_HORIZONTAL_WS = 25;
	public const TOKEN_OTHER = 27;
	public const TOKEN_END = 28;

public const TOKEN_LABELS = [
		self::TOKEN_REFERENCE => '\'&\'',
		self::TOKEN_UNION => '\'|\'',
		self::TOKEN_INTERSECTION => '\'&\'',
		self::TOKEN_NULLABLE => '\'?\'',
		self::TOKEN_OPEN_PARENTHESES => '\'(\'',
		self::TOKEN_CLOSE_PARENTHESES => '\')\'',
		self::TOKEN_OPEN_ANGLE_BRACKET => '\'<\'',
		self::TOKEN_CLOSE_ANGLE_BRACKET => '\'>\'',
		self::TOKEN_OPEN_SQUARE_BRACKET => '\'[\'',
		self::TOKEN_CLOSE_SQUARE_BRACKET => '\']\'',
		self::TOKEN_OPEN_CURLY_BRACKET => '\'{\'',
		self::TOKEN_CLOSE_CURLY_BRACKET => '\'}\'',
		self::TOKEN_COMMA => '\',\'',
		self::TOKEN_COLON => '\':\'',
		self::TOKEN_VARIADIC => '\'...\'',
		self::TOKEN_DOUBLE_COLON => '\'::\'',
		self::TOKEN_DOUBLE_ARROW => '\'=>\'',
		self::TOKEN_EQUAL => '\'=\'',
		self::TOKEN_OPEN_PHPDOC => '\'/**\'',
		self::TOKEN_CLOSE_PHPDOC => '\'*/\'',
		self::TOKEN_PHPDOC_TAG => 'TOKEN_PHPDOC_TAG',
		self::TOKEN_PHPDOC_EOL => 'TOKEN_PHPDOC_EOL',
		self::TOKEN_FLOAT => 'TOKEN_FLOAT',
		self::TOKEN_INTEGER => 'TOKEN_INTEGER',
		self::TOKEN_SINGLE_QUOTED_STRING => 'TOKEN_SINGLE_QUOTED_STRING',
		self::TOKEN_DOUBLE_QUOTED_STRING => 'TOKEN_DOUBLE_QUOTED_STRING',
		self::TOKEN_IDENTIFIER => 'TOKEN_IDENTIFIER',
		self::TOKEN_THIS_VARIABLE => '\'$this\'',
		self::TOKEN_VARIABLE => 'TOKEN_VARIABLE',
		self::TOKEN_HORIZONTAL_WS => 'TOKEN_HORIZONTAL_WS',
		self::TOKEN_OTHER => 'TOKEN_OTHER',
		self::TOKEN_END => 'TOKEN_END',
	];

public const VALUE_OFFSET = 0;
	public const TYPE_OFFSET = 1;

/** @var string|null */
	private $regexp;

/** @var int[]|null */
	private $types;

public function tokenize(string $s): array
	{
		if ($this->regexp === null || $this->types === null) {
			$this->initialize();
		}

assert($this->regexp !== null);
		assert($this->types !== null);

preg_match_all($this->regexp, $s, $tokens, PREG_SET_ORDER);

$count = count($this->types);
		foreach ($tokens as &$match) {
			for ($i = 1; $i <= $count; $i++) {
				if ($match[$i] !== null && $match[$i] !== '') {
					$match = [$match[0], $this->types[$i - 1]];
					break;
				}
			}
		}

$tokens[] = ['', self::TOKEN_END];

return $tokens;
	}

private function initialize(): void
	{
		$patterns = [
			// '&' followed by TOKEN_VARIADIC, TOKEN_VARIABLE, TOKEN_EQUAL, TOKEN_EQUAL or TOKEN_CLOSE_PARENTHESES
			self::TOKEN_REFERENCE => '&(?=\\s*+(?:[.,=)]|(?:\\$(?!this(?![0-9a-z_\\x80-\\xFF])))))',
			self::TOKEN_UNION => '\\|',
			self::TOKEN_INTERSECTION => '&',
			self::TOKEN_NULLABLE => '\\?',

self::TOKEN_OPEN_PARENTHESES => '\$',
			self::TOKEN_CLOSE_PARENTHESES => '\$',
			self::TOKEN_OPEN_ANGLE_BRACKET => '<',
			self::TOKEN_CLOSE_ANGLE_BRACKET => '>',
			self::TOKEN_OPEN_SQUARE_BRACKET => '\\[',
			self::TOKEN_CLOSE_SQUARE_BRACKET => '\\]',
			self::TOKEN_OPEN_CURLY_BRACKET => '\\{',
			self::TOKEN_CLOSE_CURLY_BRACKET => '\\}',

self::TOKEN_COMMA => ',',
			self::TOKEN_VARIADIC => '\\.\\.\\.',
			self::TOKEN_DOUBLE_COLON => '::',
			self::TOKEN_DOUBLE_ARROW => '=>',
			self::TOKEN_EQUAL => '=',
			self::TOKEN_COLON => ':',

self::TOKEN_OPEN_PHPDOC => '/\\*\\*(?=\\s)',
			self::TOKEN_CLOSE_PHPDOC => '\\*/',
			self::TOKEN_PHPDOC_TAG => '@[a-z-]++',
			self::TOKEN_PHPDOC_EOL => '\\r?+\\n[\\x09\\x20]*+(?:\\*(?!/))?',

self::TOKEN_FLOAT => '(?:-?[0-9]++\\.[0-9]*+(?:e-?[0-9]++)?)|(?:-?[0-9]*+\\.[0-9]++(?:e-?[0-9]++)?)|(?:-?[0-9]++e-?[0-9]++)',
			self::TOKEN_INTEGER => '-?(?:(?:0b[0-1]++)|(?:0o[0-7]++)|(?:0x[0-9a-f]++)|(?:[0-9]++))',
			self::TOKEN_SINGLE_QUOTED_STRING => '\'(?:\\\\[^\\r\\n]|[^\'\\r\\n\\\\])*+\'',
			self::TOKEN_DOUBLE_QUOTED_STRING => '"(?:\\\\[^\\r\\n]|[^"\\r\\n\\\\])*+"',

self::TOKEN_IDENTIFIER => '(?:[\\\\]?+[a-z_\\x80-\\xFF][0-9a-z_\\x80-\\xFF]*+)++',
			self::TOKEN_THIS_VARIABLE => '\\$this(?![0-9a-z_\\x80-\\xFF])',
			self::TOKEN_VARIABLE => '\\$[a-z_\\x80-\\xFF][0-9a-z_\\x80-\\xFF]*+',

self::TOKEN_HORIZONTAL_WS => '[\\x09\\x20]++',

// anything but TOKEN_CLOSE_PHPDOC or TOKEN_HORIZONTAL_WS or TOKEN_EOL
			self::TOKEN_OTHER => '(?:(?!\\*/)[^\\s])++',
		];

$this->regexp = '~(' . implode(')|(', $patterns) . ')~Asi';
		$this->types = array_keys($patterns);
	}

}