Unable to run _ByValue example

[Srikanth]

On Monday 28 December 2015 10:30 AM, Srikanth wrote:
> Hello Boaz,
>
> This is a known issue - ATM, the VM does not yet handle the changes to 
> signatures
> that embed 'Q' in them to denote value types and it may be some time 
> before the
> VM support for this is fully there.
>
> We are exploring some interim options to allow interested early access 
> testers to
> experiment with the usability aspects of the value type model (knowing 
> that attendant
> performance improvements are yet to come)

Hello Boaz,

As of 
http://hg.openjdk.java.net/valhalla/valhalla/langtools/rev/659f44b99b6c, 
pushed on
Jan 22nd, by using the javac option -XDGenerateValueAsReference, you can 
produce class
files that can be run - the new syntax for value types will be accepted, 
you will not yet
see any performance improvements - This is iput in place to enable early 
testers to
get a feel for the usability model and share feedback. Please try this out.

Thanks!
Srikanth

>
> Stay tuned.
> Thanks!
> Srikanth
>
> On Friday 25 December 2015 05:56 PM, Boaz Nahum wrote:
>> (last pull valhalla today)
>> Trying this:
>>
>> public final __ByValue class Point {
>>      final int x;
>>      final int y;
>>      Point(int x, int y) {
>>          this.x = x;
>>          this.y = y;
>>      }
>>
>>      public static void main(String[] args) {
>>          Point p = __Make Point(5, 6);
>>      }
>> }
>>
>> (Compile file directly with bin/javac.exe not using IntelliJ)
>>
>> When trying to run:
>>
>> F:\Dev\JDKBuild\valhalla\build\windows-x86_64-normal-server-release\images\jdk\bin\java 
>>
>> -cp F:\Dev\IntelliJProjectsOut\LearnJDK10\production\LearnJDK10
>> by_val.Point
>> java.lang.ClassFormatError: Method "<vminit>" in class by_val/Point
>> has illegal signature "(II)Qby_val/Point;"
>>     at java.lang.ClassLoader.defineClass1(Native Method)
>>     at java.lang.ClassLoader.defineClass(ClassLoader.java:759)
>>     at java.lang.ClassLoader.defineClass(ClassLoader.java:835)
>>     at 
>> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:184)
>>     at java.net.URLClassLoader.defineClass(URLClassLoader.java:547)
>>     at java.net.URLClassLoader.access$100(URLClassLoader.java:87)
>>     at java.net.URLClassLoader$1.run(URLClassLoader.java:413)
>>     at java.net.URLClassLoader$1.run(URLClassLoader.java:397)
>>     at java.security.AccessController.doPrivileged(Native Method)
>>     at java.net.URLClassLoader.findClass(URLClassLoader.java:396)
>>     at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
>>     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:262)
>>     at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
>>     at 
>> sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:503)
>> Error: A JNI error has occurred, please check your installation and 
>> try again
>> Exception in thread "main"
>> Process finished with exit code 1
>>
>> Thx
>> Boaz
>