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Number / type issue of arguments being passed to overloaded C ++ constructor wrapped in swig

I'm trying to wrap a C ++ class (call it "Spam") written by someone else with swig to expose it to Python. After solving a few problems, I can import the module in python, but when I try to create an object of such a class, I get the following error:

 foo = Spam.Spam('abc',3)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "Spam.py", line 96, in __init__
    this = _Spam.new_Spam(*args)
NotImplementedError: Wrong number of arguments for overloaded function 'new_Spam'.
  Possible C/C++ prototypes are:
    Spam(unsigned char *,unsigned long,bool,unsigned int,SSTree::io_action,char const *)
    Spam(unsigned char *,unsigned long,bool,unsigned int,SSTree::io_action)
    Spam(unsigned char *,unsigned long,bool,unsigned int)
    Spam(unsigned char *,unsigned long,bool)
    Spam(unsigned char *,unsigned long)

By following the link, I realized that the error is probably caused by the type of the arguments, not the number (which is quite confusing), but I still can't figure out. I suspect the problem is with passing the string as the first argument, but have no idea how to fix it (remember that I hardly know c / C ++).

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3 answers


SWIG treats strings as "char *". Your use of "unsigned char *" is most likely confusing. You can either change the signature to "char *" or provide the following card:



%typemap(in) unsigned char * = char*
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Try:



%typemap(in) (unsigned char *) = (char *);
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This can be solved by changing the lines from 100 to 110

self.source = uhd_receiver(options.args, symbol_rate,
                                   options.samples_per_symbol,
                                   options.rx_freq, options.rx_gain,
                                   options.spec, options.antenna,
                                   options.verbose)

        self.sink = uhd_transmitter(options.args, symbol_rate,
                                    options.samples_per_symbol,
                                    options.tx_freq, options.tx_gain,
                                    options.spec, options.antenna,
                                    options.verbose)

the next

self.source = uhd_receiver(options.args, symbol_rate,
                                       options.samples_per_symbol, options.rx_freq, 
                                       options.lo_offset, options.rx_gain,
                                       options.spec, options.antenna,
                                       options.clock_source, options.verbose)

        self.sink = uhd_transmitter(options.args, symbol_rate,
                                        options.samples_per_symbol, options.tx_freq,
                                        options.lo_offset, options.tx_gain,
                                        options.spec, options.antenna,
                                        options.clock_source, options.verbose)

Good luck.

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