Re: pvaClientCPP Release 4.5.0 access to a single sub field that has the correct type

[Marty Kraimer via Tech-talk <tech-talk@aps.anl.gov>]

On 12/1/19 4:07 AM, Heinz Junkes wrote:
> Hello, Marty,
>
> thank you for wanting to take care of this.
>
> A question on the side:
> Is there a reason why you can't call also int's and long's directly?
>
> There is no
> getInt, putInt, getLong, putLong, getIntArray, putIntArray, getLongArray, putLongArray etc.
>
> Or did I miss something?
This means byte, short, ubyte, ushort, uint, ulong, and float.
Note that double does work for all the numeric types.
The other types are converted to from double.

My thought was to provide the most useful convenience methods.
If someone really want to use any of the integer types they must do more 
work.
Marty
> Danke, Heinz
>
>
> > On 30. Nov 2019, at 16:58, Marty Kraimer via Tech-talk <tech-talk@aps.anl.gov> wrote:
> >
> > You are correct that the code for puts only works on a top level field named  value.
> >
> > A new issue has been created.
> > > https://github.com/epics-base/pvaClientCPP/issues/63
> > Marty
> >
> > On 11/28/19 11:12 AM, Heinz Junkes via Tech-talk wrote:
> > > According the documentation to Release 4.5.0 :
> > >
> > > Changes have been made for getDouble, putDouble, getDoubleArray, putDoubleArray, getString, putString, getStringArray, and putStringArray.
> > >
> > > 1) Previously each only had support for a top level field named value. Each now allows access to a single sub field that has the correct type. Thus pvRequest must select a single field. For example
> > >
> > >      pva->channel("PVRdumbPowerSupply")->putDouble(1.0,"power.value" );
> > >
> > >
> > > I try to access a double array  but with no success:
> > >
> > >      string channelName("CRYVISIL:STM:FASTSCAN:IMAGE_CHUNK");
> > >      string providerName("pva");
> > >      PvaClientPtr pva = PvaClient::get(providerName);
> > >
> > >         pva->channel(channelName, providerName, 1.0)->putDoubleArray(freeze(valx), "value.column0");
> > >
> > > error message:
> > > 2019/11/28 10:06:17.754 sis0: void Sis3316Port::updateTask(): PvaClientData::putDoubleArray() did not find a scalarArray field
> > >
> > > Command line works:
> > >
> > > [junkes@h epics]$ pvget -r "value.column0" CRYVISIL:STM:FASTSCAN:IMAGE_CHUNK
> > > CRYVISIL:STM:FASTSCAN:IMAGE_CHUNK structure
> > >      structure value
> > >          double[] column0 []
> > >
> > > How can I address the DoubleArray?
> > >
> > > Danke Heinz