Implement Pattern::instanceof(), Pattern::not()

src/muqsit/arithmexp/pattern/Pattern.php

@@ -6,7 +6,9 @@
 
 use Generator;
 use muqsit\arithmexp\expression\token\ExpressionToken;
+use muqsit\arithmexp\pattern\matcher\NotPatternMatcher;
 use muqsit\arithmexp\pattern\matcher\PatternMatcher;
+use muqsit\arithmexp\pattern\matcher\InstanceOfPatternMatcher;
 use muqsit\arithmexp\Util;
 
 final class Pattern{
@@ -24,4 +26,16 @@ public static function &findMatching(PatternMatcher $matcher, array &$tree) : Ge
 			}
 		}
 	}
+
+	public static function not(PatternMatcher $matcher) : PatternMatcher{
+		return new NotPatternMatcher($matcher);
+	}
+
+	/**
+	 * @param class-string<ExpressionToken> $type
+	 * @return PatternMatcher
+	 */
+	public static function instanceof(string $type) : PatternMatcher{
+		return new InstanceOfPatternMatcher($type);
+	}
 }

src/muqsit/arithmexp/pattern/matcher/InstanceOfPatternMatcher.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace muqsit\arithmexp\pattern\matcher;
+
+use muqsit\arithmexp\expression\token\ExpressionToken;
+
+final class InstanceOfPatternMatcher implements PatternMatcher{
+
+	/**
+	 * @param class-string<ExpressionToken> $class
+	 */
+	public function __construct(
+		private string $class
+	){}
+
+	public function matches(ExpressionToken|array $entry) : bool{
+		if($entry instanceof ExpressionToken){
+			return $entry instanceof $this->class;
+		}
+		foreach($entry as $token){
+			if(!($token instanceof $this->class)){
+				return false;
+			}
+		}
+		return true;
+	}
+}

src/muqsit/arithmexp/pattern/matcher/NotPatternMatcher.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace muqsit\arithmexp\pattern\matcher;
+
+use muqsit\arithmexp\expression\token\ExpressionToken;
+
+final class NotPatternMatcher implements PatternMatcher{
+
+	public function __construct(
+		private PatternMatcher $matcher
+	){}
+
+	public function matches(ExpressionToken|array $entry) : bool{
+		return !$this->matcher->matches($entry);
+	}
+}