- Added while/endwhile and do/while syntaxes

- Fix the abstractclass requirement of parse() function

src/ControlStructure/WhileToken.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Picea\ControlStructure;
+
+class WhileToken extends AbstractLoop {
+    public array $token = [ "do", "while", "endwhile", ];
+
+    public function parse(\Picea\Compiler\Context &$context, ?string $arguments, string $token) {
+        switch($token) {
+            case "do":
+                $context->iterationStack[] = [
+                    'or' => false,
+                    'token' => "do",
+                ];
+
+                return "<?php do { ?>";
+
+            case "while":
+                if ( $context->iterationStack ?? false ) {
+                    if ( end($context->iterationStack)['token'] === 'do' ) {
+                        array_pop($context->iterationStack);
+
+                        return "<?php } while($arguments); ?>";
+                    }
+                }
+        }
+
+        return parent::parse($context, $arguments, $token);
+    }
+}
+
+