invoke branch (was: proposal: move Kawa from Subversion to git on gitlab.com)

[Per Bothner <per@bothner.com>]

I checked into the invoke branch a change that does this.
It builds and passes the tests using Java 6 (except some Unicode tests).
I assume Android will also work.

We use reflection rather than MethodHandles, which I assume will be slower.

It would be useful to have some sample programs we can benchmark.
We need some numbers of the performance of the invoke branch
compared to the old way (in the trunk) - both Java 6 and Java 8,
both --full-tailcalls and not.


On 11/12/2016 09:06 PM, Per Bothner wrote:
> On 11/12/2016 08:41 PM, Jamison Hope wrote:
>
>> Re MethodHandles, I use Kawa on some computers at work that are stuck
>> with RHEL 6 + Java 6, so please don't break it!
>
> Noted!
>
> One idea I had is to define a fake MethodHandle class:
>
> public class CallContext {
>    ....
>    /* #ifndef use:java.lang.invoke */
>    // public static abstract class MethodHandle {
>    //     public abstract Object invokeExact(Procedure proc, CallContext ctx);
>    // };
>    /* #endif */
> }
>
> And in code that uses it:
>
> /* #ifdef use:java.lang.invoke */
> import java.lang.invoke.Methodhandle;
> /* #else */
> // import gnu.mapping.CallContext.MethodHandle;
> /* #endif */
>
> It's rather gross but it reduces the places where PreProcessing
> conditionals would be needed to clutter up the code.
> (Actual typedefs would be cleaner.)
>
> A concrete class that extends CallContext.MethodHandle might
> use reflection, but it could also be compiler-generated.

-- 
	--Per Bothner
per@bothner.com   http://per.bothner.com/