Here is my example:
-------------------------------------------------------------------------------------------
CPP Code:
-------------------------------------------------------------------------------------------
#include <boost/python.hpp>
using namespace boost::python;
void updateDoubleReference(double& x)
{
x = x + 5.4321;
}
BOOST_PYTHON_MODULE(_testDR)
{
// Add regular functions to the module.
def("updateDoubleReference", &updateDoubleReference );
}
-------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
PY Code:
-------------------------------------------------------------------------------------------
#!/usr/bin/python
#
#
from _testDR import *
x = 3.0
updateDoubleReference(x)
--------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------
ERROR OUTPUT
-------------------------------------------------------------------------------------------
python2.5 testDR.py
Traceback (most recent call last):
File "testDR.py", line 8, in <module>
updateDoubleReference(x)
Boost.Python.ArgumentError: Python argument types in
_testDR.updateDoubleReference(float)
did not match C++ signature:
updateDoubleReference(double {lvalue})
-------------------------------------------------------------------------------------------
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.
Any help would be greatly appreciated.
Thanks,
Liam
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