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<p class="MsoNormal">Here is my example:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal">CPP Code:<o:p></o:p></p>
<p class="MsoNormal">-------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal">#include <boost/python.hpp><o:p></o:p></p>
<p class="MsoNormal">using namespace boost::python;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">void updateDoubleReference(double& x)<o:p></o:p></p>
<p class="MsoNormal">{<o:p></o:p></p>
<p class="MsoNormal"> x = x + 5.4321;<o:p></o:p></p>
<p class="MsoNormal">}<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">BOOST_PYTHON_MODULE(_testDR)<o:p></o:p></p>
<p class="MsoNormal">{<o:p></o:p></p>
<p class="MsoNormal"> // Add regular functions to the module.<o:p></o:p></p>
<p class="MsoNormal"> def("updateDoubleReference", &updateDoubleReference );<o:p></o:p></p>
<p class="MsoNormal">} <o:p></o:p></p>
<p class="MsoNormal">-------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal">PY Code:<o:p></o:p></p>
<p class="MsoNormal">-------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal">#!/usr/bin/python<o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal">#<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">from _testDR import *<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">x = 3.0<o:p></o:p></p>
<p class="MsoNormal">updateDoubleReference(x)<o:p></o:p></p>
<p class="MsoNormal">--------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal">ERROR OUTPUT<o:p></o:p></p>
<p class="MsoNormal">-------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal">python2.5 testDR.py<o:p></o:p></p>
<p class="MsoNormal">Traceback (most recent call last):<o:p></o:p></p>
<p class="MsoNormal"> File "testDR.py", line 8, in <module><o:p></o:p></p>
<p class="MsoNormal"> updateDoubleReference(x)<o:p></o:p></p>
<p class="MsoNormal">Boost.Python.ArgumentError: Python argument types in<o:p></o:p></p>
<p class="MsoNormal"> _testDR.updateDoubleReference(float)<o:p></o:p></p>
<p class="MsoNormal">did not match C++ signature:<o:p></o:p></p>
<p class="MsoNormal"> updateDoubleReference(double {lvalue})<o:p></o:p></p>
<p class="MsoNormal">-------------------------------------------------------------------------------------------<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">How do people typically handle this issue? Wrap the function with ‘float’ versions of the arguments? I tried to create a ‘NativeDouble’ struct that had a double member attribute but when exposed to python, it simply interprets this as
a float and it still has a mismatch.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Any help would be greatly appreciated.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Liam<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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