# HG changeset patch
# User Jaroslav Tulach <jaroslav.tulach@apidesign.org>
# Date 1355067816 -3600
# Node ID c6f21b56a6cf27297423f6db3f93e3227142dc79
# Parent  21c0cf272b0590649a5ad6f5e79d2bb59505d6ec
Null can be casted to any type

diff -r 21c0cf272b05 -r c6f21b56a6cf vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java
--- a/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Fri Dec 07 10:35:31 2012 +0100
+++ b/vm/src/main/java/org/apidesign/vm4brwsr/ByteCodeToJavaScript.java	Sun Dec 09 16:43:36 2012 +0100
@@ -759,9 +759,9 @@
                     final String type = jc.getClassName(indx);
                     if (!type.startsWith("[")) {
                         // no way to check arrays right now
-                        out.append("if(s[s.length - 1].$instOf_")
+                        out.append("if(s[s.length - 1] !== null && !s[s.length - 1].$instOf_")
                            .append(type.replace('/', '_'))
-                           .append(" != 1) throw {};"); // XXX proper exception
+                           .append(") throw {};"); // XXX proper exception
                     }
                     i += 2;
                     break;
diff -r 21c0cf272b05 -r c6f21b56a6cf vm/src/test/java/org/apidesign/vm4brwsr/StaticMethod.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/StaticMethod.java	Fri Dec 07 10:35:31 2012 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/StaticMethod.java	Sun Dec 09 16:43:36 2012 +0100
@@ -106,6 +106,11 @@
         throw new IllegalStateException();
     }
     
+    public static String castNull(boolean n) {
+        Object value = n ? null : "Ahoj";
+        return (String)value;
+    }
+    
     public static String swtch(int what) {
         switch (what) {
             case 0: return "Jarda";
diff -r 21c0cf272b05 -r c6f21b56a6cf vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java	Fri Dec 07 10:35:31 2012 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java	Sun Dec 09 16:43:36 2012 +0100
@@ -238,6 +238,13 @@
         );
     }
     
+    @Test public void checkNullCast() throws Exception {
+        assertExec("Null can be cast to any type",
+            StaticMethod.class, "castNull__Ljava_lang_String_2Z", 
+            null, true
+        );
+    }
+    
     private static CharSequence codeSeq;
     private static Invocable code;