Trying to work newer indy into JRuby

[Fredrik Öhrström]

Rémi Forax skrev:
> Wow ...
> So this code will create a forever loop and not a StackOverflowError ?
>
> MethodHandle target=MethodHandles.exactInvoker(
>    MethodType.make(void.class));
> MethodHandle combiner=lookup().findVirtual(ThisClass, "combine",
>    MethodType.make(MethodHandle.class));
> ...
> MethodHandle combine() {
>   System.our.println("loop");
>   return MethodHandles.combineArguments(target, 0, combiner);
> }
> ...
> combiner.invoke();
>   
I assume that you mean combine().invoke() ?  :-)
When I read the spec, the method handle invocations is specified to
behave "as if" an
invokestatic/invokespecial/invokevirtual call was made. This means that,
most
likely the JVM will throw a StackOverflowError. Unless the JVM has
implemented
tail recursion. I.e. it is not specified.

//Fredrik
> Is it the behavior of the hotspot implementation or the one required
> by the spec ?
>
>   
>> I expect to implement guardWithTest on top of combineArguments.
>>
>> -- John
>>   
>>     
> Rémi
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