SWIG interface files

Posted by Andre Louw-2 on Jun 05, 2002; 4:18am
URL: http://quantlib.414.s1.nabble.com/SWIG-interface-files-tp10103.html

Hi,

I have a cpp class in a library of my own that inherits off
QuantLib::Instrument. I now need to create a SWIG file for this.

I assumed that I would only need to "%import Instruments.i" to get the
needed definitions, this leads to all kinds of compile errors.
Using "%include Instruments.i" doesn't hack it either, redoing all the
needed "typedef" statements in my interface file solves the compile errors
but I get weird errors when using my library: accessing
DayCounter.yearFraction(d1,d2) for instance gives me an error saying it
needs 5 arguments (only 3 supplied) - it's as if it doesn't know the last 2
are default arguments.

This is my SWIG file:

#ifndef myinstr_i
#define myinstr_i

%include Instruments.i
%include TermStructures.i
%include String.i

%{
#include <myinstr.hpp>
using MyNameSpace::MyInstr;
typedef RelinkableHandle<QuantLib::TermStructure>
TermStructureRelinkableHandle;
typedef Handle<QuantLib::Instrument> InstrumentHandle;
typedef QuantLib::Handle<MyInstr> MyInstrHandle;
typedef std::string String;
%}

// fake inheritance between handles
%name(MyInstr) class MyInstrHandle
: public InstrumentHandle {
  public:
    // constructor redefined below
    ~MyInstrHandle();
};

%addmethods MyInstrHandle {
    MyInstrHandle(TermStructureRelinkableHandle tStruct,
        String isinCode, String description) {
            return new MyInstrHandle(
               new MyInstr(tStruct, isinCode, description));
    }
    double fairRate() {
       return (*self)->fairRate();
    }
}

#endif

What is the correct way of doing something like this (i.e using SWIG
interface-files from other projects)?

Any help appreciated.

Andre

 
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