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?
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