Rémi Forax skrev:
> In that case, guards etc can be implemented using only convert, spread
> and collect and the JavaMethodHandle.
>
If you have collect/spread that converts each array element,
then you do not need the JavaMethodHandle.
> But, for my pet project, for Groovy or for Neal's closure, you have to
> deal with signatures including primitive types.
> In that case, insert/drop, permute and combine/guardWithTest are very
> useful.
>
This is only the case if you do not trust that your JVM will optimize
away autoboxing.
Insert/drop,permute/combine/guardwithtest can be easily implemented if you
have either:
collect/spread
or
convert for each argument in a method handle invoke, as I
described before.
//Fredrik
(As an interesting sidenote, collect/spread is build into C# at the
lowest level,
performing collect: void mytransform(params object[] args) { ....... }
performing spread: mydelegate.DynamicInvoke(args);
since we do not have a bytecode identifier that can mark a Java method as
collecting its arguments, we cannot currently do this.)
> Rémi
>
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