Add specialized tags support

Specialized tags are tags including a signle colon.

Author: jaapio

src/Lexer/Lexer.php

@@ -146,7 +146,7 @@ private function generateRegexp(): string
 
 			self::TOKEN_OPEN_PHPDOC => '/\\*\\*(?=\\s)\\x20?+',
 			self::TOKEN_CLOSE_PHPDOC => '\\*/',
-			self::TOKEN_PHPDOC_TAG => '@[a-z][a-z0-9-\\\\]*+',
+			self::TOKEN_PHPDOC_TAG => '@(?:[a-z][a-z0-9-\\\\]+:)?[a-z][a-z0-9-\\\\]*+',
 			self::TOKEN_PHPDOC_EOL => '\\r?+\\n[\\x09\\x20]*+(?:\\*(?!/)\\x20?+)?',
 
 			self::TOKEN_FLOAT => '(?:-?[0-9]++\\.[0-9]*+(?:e-?[0-9]++)?)|(?:-?[0-9]*+\\.[0-9]++(?:e-?[0-9]++)?)|(?:-?[0-9]++e-?[0-9]++)',

tests/PHPStan/Parser/PhpDocParserTest.php

@@ -75,6 +75,7 @@ protected function setUp(): void
 
 	/**
 	 * @dataProvider provideTagsWithNumbers
+	 * @dataProvider provideSpecializedTags
 	 * @dataProvider provideParamTagsData
 	 * @dataProvider provideTypelessParamTagsData
 	 * @dataProvider provideVarTagsData
@@ -4851,6 +4852,22 @@ public function provideParamOutTagsData(): Iterator
 		];
 	}
 
+	public function provideSpecializedTags(): Iterator
+	{
+		yield [
+			'Ok specialized tag',
+			'/** @special:param this is special */',
+			new PhpDocNode([
+				new PhpDocTagNode(
+					'@special:param',
+					new GenericTagValueNode(
+						'this is special'
+					)
+				),
+			]),
+		];
+	}
+
 	/**
 	 * @dataProvider dataParseTagValue
 	 * @param PhpDocNode $expectedPhpDocNode