Re: Help, writing kawa equivalent of java program

[Per Bothner <per@bothner.com>]

On 04/01/2017 01:20 PM, Sudarshan S Chawathe wrote:
>> (define-alias library com.sun.jna.Library)
>> (define-alias native com.sun.jna.Native)
>>
>> (define-simple-class libc (library)
>>   interface: #t
>>   (getpid::long))
>>
>> (define inst::libc (native:loadLibrary "c" libc:class))
>> (display (inst:getpid))
>
> I think you need to define the interface to have a getpid method with
> the proper signature.  Here is a small example, somewhat similar to your
> code, that I tried a while back and that works:
>
> (define-simple-class clib (com.sun.jna.Library)
>   interface: #t
>   ((puts (s ::String)) ::void #!abstract))

Kawa should be able to infer the signature, so I believe you can write:

     ((puts (s)) #!abstract))

The problem is that:
    (getpid::long)
defines a field, not a method (and non-statuc fields aren't allowed in interfaces).

Kawa should probably catch this error.
-- 
	--Per Bothner
per@bothner.com   http://per.bothner.com/