Re: [Vala] How to pass items of an array as out parameters?

[Sandino Flores Moreno <tigrux gmail com>]

Jürg confirms this is a bug.
So I entered a new one in bugzilla:

https://bugzilla.gnome.org/show_bug.cgi?id=609388


On Tue, Feb 9, 2010 at 2:17 AM, Sandino Flores Moreno <tigrux gmail com> wrote:
> In my program, I need to initialize variables that are items of an array.
> It's a situation that can be roughly simplified to this:
>
> [test.vala]
>
> void modify(out int n) {
>        n = 5;
> }
>
> void main() {
>        int[] a = new int[3];
>        for(int i=0; i<a.length; i++)
>                modify(out a[i]);
> }
>
> [/test.vala]
>
> However, I get this error:
>
> $ valac test.vala
> test.vala:8.10-8.17: error: ref and out method arguments can only be
> used with fields, parameters, and local variables
>                modify(out a[i]);
>
>
>
> More specifically, I had this code that is valid in C:
>
>    OMX_BUFFERHEADERTYPE *inBufferAudioDec[2];
>    for(i=0; i<2; i++) {
>        err = OMX_AllocateBuffer(audiodechandle, &inBufferAudioDec[i],
> 0, NULL, buffer_in_size);
>        if (err != OMX_ErrorNone)
>            exit(1);
>    }
>
> That is translated to Vala as shown:
>
>    Omx.BufferHeader[] inBufferAudioDec = new Omx.BufferHeader[2];
>    for(i=0; i<2; i++) {
>        err = audiodechandle.allocate_buffer(out inBufferAudioDec[i],
> 0, null, buffer_in_size);
>        if (err != Omx.Error.None)
>            Posix.exit(1);
>    }
>
> But, Vala fails with the error specified in the canonical example.
>
> So, how should I pass items of an array as out parameters of a method
> or function?