first commit

vendor/nikic/php-parser/lib/PhpParser/Modifiers.php

@@ -0,0 +1,69 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser;
+
+/**
+ * Modifiers used (as a bit mask) by various flags subnodes, for example on classes, functions,
+ * properties and constants.
+ */
+final class Modifiers {
+    public const PUBLIC    =  1;
+    public const PROTECTED =  2;
+    public const PRIVATE   =  4;
+    public const STATIC    =  8;
+    public const ABSTRACT  = 16;
+    public const FINAL     = 32;
+    public const READONLY  = 64;
+
+    public const VISIBILITY_MASK = 1 | 2 | 4;
+
+    /**
+     * @internal
+     */
+    public static function verifyClassModifier(int $a, int $b): void {
+        if ($a & Modifiers::ABSTRACT && $b & Modifiers::ABSTRACT) {
+            throw new Error('Multiple abstract modifiers are not allowed');
+        }
+
+        if ($a & Modifiers::FINAL && $b & Modifiers::FINAL) {
+            throw new Error('Multiple final modifiers are not allowed');
+        }
+
+        if ($a & Modifiers::READONLY && $b & Modifiers::READONLY) {
+            throw new Error('Multiple readonly modifiers are not allowed');
+        }
+
+        if ($a & 48 && $b & 48) {
+            throw new Error('Cannot use the final modifier on an abstract class');
+        }
+    }
+
+    /**
+     * @internal
+     */
+    public static function verifyModifier(int $a, int $b): void {
+        if ($a & Modifiers::VISIBILITY_MASK && $b & Modifiers::VISIBILITY_MASK) {
+            throw new Error('Multiple access type modifiers are not allowed');
+        }
+
+        if ($a & Modifiers::ABSTRACT && $b & Modifiers::ABSTRACT) {
+            throw new Error('Multiple abstract modifiers are not allowed');
+        }
+
+        if ($a & Modifiers::STATIC && $b & Modifiers::STATIC) {
+            throw new Error('Multiple static modifiers are not allowed');
+        }
+
+        if ($a & Modifiers::FINAL && $b & Modifiers::FINAL) {
+            throw new Error('Multiple final modifiers are not allowed');
+        }
+
+        if ($a & Modifiers::READONLY && $b & Modifiers::READONLY) {
+            throw new Error('Multiple readonly modifiers are not allowed');
+        }
+
+        if ($a & 48 && $b & 48) {
+            throw new Error('Cannot use the final modifier on an abstract class member');
+        }
+    }
+}