Re: [xmlvm-users] Getting started

[Damian <dam...@gm...>]

Well I managed to get something working. I cross compiled the library and
then stripped it down. I removed actors, xml, DynamicVariable, and a lot
more. I'm having some issues with Console (or StringBuilder, don't know
yet), and I will surely encounter more problems later.
But well, it's working now :D

I will watch your video as soon as I can.

2010/6/7 Kühn Wolfgang <wo....@en...>

>  Hi Damian,
>
> here some issues I found while trying to cross-compile Scala to JavaScript:
> * The footprint may be larger as anticipated. For exampe, Console.scala
> uses DynamicVariable.scala,
>    which uses the JRE class InheritableThreadLocal.java.
> * The Scala to Java-Byte-Code compiler emits code different from the JDK
> compiler. For example, Scala
>    makes extensive use of method overloading by return type. In Java, the
> return type is not even part of the
>    method signature. Another example is exception handling, where the
> current Scala compiler generates multi-
>    entrant catch blocks. This is not possible in Java either.
>
> However, these issues can be handled, but I would stay clear of the
> concurrency features of Scale (actors).
> Also be aware of extensive method invocations and object creations by Scala
> programs, which modern JVMs
> handle well, but which may not be the case for cross-compiled code.
>
> For more details and some demos, please refer to
> http://days2010.scala-lang.org/node/138/142
>
> Greetings, Wolfgang
>
>  ------------------------------
> *Von:* Damian [mailto:dam...@gm...]
> *Gesendet:* Samstag, 5. Juni 2010 05:51
> *An:* Panayotis Katsaloulis
> *Cc:* xml...@li...
> *Betreff:* Re: [xmlvm-users] Getting started
>
> Thanks for your reply.
> I don't fully understand the problem you expose.
> I succeeded cross-compiling the scala library (I wanted to try it anyway)
> by adding -Xmx1024m option when launching xmlvm.
> But the objective c compiler won't compile it anyway, it seems it can't
> find "java_lang_Cloneable.h". Isn't Cloneable interface supported by xmlvm?
> I was thinking that maybe I can try to strip down scala library to a
> minimum and then write my own library with the functionality I really need
> around the java library. Though that's exactly what the scala library is,
> the scala library is a 3.5MB jar that's maybe using too many features
> unsupported by xmlvm.
> Please tell me your thoughts.
>
> Damian.
>
> On Fri, Jun 4, 2010 at 7:16 AM, Panayotis Katsaloulis <
> pan...@pa...> wrote:
>
>>
>> On 04 Ιουν 2010, at 2:15 ΠΜ, Damian wrote:
>>
>> >
>> > 2. My language of choice is Scala by far, and my point is to code
>> > IPhone apps using Scala. Is that possible? Have anyone tried to get
>> > xmlvm working with scala?
>>
>>
>> It is possible.
>> In theory you should be able to do so with no problems, since I think
>> this library does not contain any native code (or maybe am wrong).
>>
>> But  there are a lot of things to consider first, before jumping to
>> Scala with xmlvm.
>>
>> First of all, I believe it is totally non-practical to compile the
>> whole scala-lib. It is huge and contains a lot of things that are not
>> directly usable, There are methods and tricks to cut down this
>> overhead, (like a patch I am preparing and will be submitted soon),
>> but still this is not practical - *right now*.
>>
>> Second there are things that should be addressed first before simply
>> compile it with xmlvm, having to do with dependency libraries etc.
>>
>> Another thing: I strongly believe there is NO reason to create a
>> compatibility library for Scala, the only thing that needs to be done
>> is to determine the scala-lib dependencies.
>> And this is a long talk.
>>
>>
>> To summarize: I believe xmlvm is not ready for Scala yet, although I
>> have the same idea as you: I want Scala to be able to be a language of
>> choice - and not only Scala but every JVM based language.
>> Right now you have to be patient though and go with the flow :)
>>
>>
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>