added TagParser::consumeCommaBeforeArguments()

Author: dg

src/Latte/Compiler/TagParser.php

@@ -160,6 +160,25 @@ public function isEnd(): bool
 	}
 
 
+	/**
+	 * Consumes the optional comma separating the tag name from its arguments.
+	 * Triggers deprecation when the comma is missing but arguments still follow.
+	 * A trailing modifier (|filter) is not considered arguments.
+	 * @internal
+	 */
+	public function consumeCommaBeforeArguments(string $tag): void
+	{
+		if (
+			!$this->stream->tryConsume(',')
+			&& !$this->isEnd()
+			&& !$this->stream->is(Token::Php_FilterPipe)
+		) {
+			$position = $this->stream->peek()->position;
+			trigger_error("Missing comma before arguments in {{$tag}} tag $position.", E_USER_DEPRECATED);
+		}
+	}
+
+
 	/** @throws Latte\CompileException */
 	private function parse(string $schema, bool $recovery = false): mixed
 	{