Re: Howto override the argument names of certain class member functions

Many thanks for your reply, yes I could do something like that but this 
is a complex library with lots of classes and functions defined in 
header files and I wanted to leave those header files alone and get SWIG 
to use them directly. I don't want to rewrite the header files into SWIG 
definition files as that would be a lot of work and unmaintainable. So I 
was hoping that SWIG could, somehow, apply an argument rename on a 
function by function basis.

I have done it at the moment by pre-processing all of the header files 
through sed before SWIG sees them, but that's a bit messy.

Terry
On 22/06/2020 10:54, Rui Oliveira wrote:
> Hey,
>
> You're probably looking to do something like:
>
> %apply (float complex *OUTPUT) {(liquid_float_complex *_y), 
> (liquid_float_complex *_x_hat)};
> void modem_modulate(modem _q, unsigned int _s, liquid_float_complex *_y);
> void modem_get_demodulator_sample(modem _q, liquid_float_complex 
> *_x_hat);
> %clear (liquid_float_complex *_y), (liquid_float_complex *_x_hat);
>
> This is an example from code I've written. This is documented in:
> http://www.swig.org/Doc4.0/SWIGDocumentation.html#Arguments_nn7
>
> Basically you write typemaps with generic names and then apply them to 
> your particular function arguments.
> Me personally, I like to clear %apply directives when I no longer need 
> them to avoid bugs to do "stray" typemaps.
>
> Hope it helped.
>
> Às 10:46 de 22/06/2020, Terry Barnaby escreveu:
>> I am wrapping a relatively complex C++ class library to produce a 
>> Python interface. One thing I haven't worked out how to do is to tell 
>> SWIG to return certain function reference arguments on the lhs of the 
>> function call only, ie. assume them to be OUTPUT only references. For 
>> example (very simplified):
>>
>> class DataFile {
>>
>> public:
>>
>>     Error setInfo(const Info& info);    // Input only reference
>>
>>     Error getInfo(Info& info);        // Output only reference
>>
>> };
>>
>> Now I can rename the getInfo function in the C++ class library to 
>> "Error getInfo(Info& OUTPUT);" say and add the appropriate typemaps 
>> to match this and that works, but I really don't want to rename all 
>> of the C++'s API function arguments for all of the classes in this 
>> library (They are used for doxygen etc).
>>
>> This there a simple way in SWIG to override/rename the arguments of a 
>> particular function and/or particular classes member function ? So 
>> something like:
>>
>> %rename("getInfo(Info& OUTPUT)") "getInfo(Info& info)"
>>
>> %rename("DataFile::getInfo(Info& OUTPUT)") "DataFile::getInfo(Info& 
>> info)"
>>
>>
>>
>> _______________________________________________
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>
>
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