Fix #388: Cannot use the class magic constant in traits.

Author: dim-s

jphp-core/src/org/develnext/jphp/core/syntax/generators/manually/SimpleExprGenerator.java

@@ -644,7 +644,7 @@ protected Token processStaticAccess(Token current, Token previous, ListIterator<
                 } else
                     unexpectedToken(current);
             } else if (current instanceof ClassStmtToken) { // PHP 5.5 ::class
-                if (clazz instanceof ParentExprToken || clazz instanceof StaticExprToken) {
+                if (clazz instanceof ParentExprToken || clazz instanceof StaticExprToken || clazz instanceof SelfExprToken) {
                     if (clazz instanceof StaticExprToken) {
                         analyzer.getScope().setStaticExists(true);
                     }

jphp-core/tests/org/develnext/jphp/core/compiler/jvm/ClassesTest.java

@@ -158,6 +158,11 @@ public void testBug404() {
         check("classes/bug404.phpt", true);
     }
 
+    @Test
+    public void testBug388() {
+        check("classes/bug388.phpt", true);
+    }
+
     @Test
     public void testBug264() {
         check("classes/bug264.php");

jphp-core/tests/resources/classes/bug388.phpt

@@ -0,0 +1,12 @@
+--TEST--
+Cannot use the `class` magic constant in traits
+--FILE--
+<?php
+trait a
+{
+    public static function test() { var_dump(self::class); }
+}
+a::test();
+?>
+--EXPECT--
+string(1) "a"