On May 9, 2013, at 12:42 , Alex Leach <beamesle...@gmail.com> wrote:
> On Thu, 09 May 2013 07:41:49 +0100, Wichert Akkerman <wich...@wiggy.net>
> wrote:
>
>> If I try to do that by adding this:
>>
>> to_python_converter<boost::uuids::uuid, uuid_to_python>();
>> to_python_converter<boost::uuids::uuid&, uuid_to_python>()
>>
>> I get a compile error:
>>
>> /opt/local/include/boost/python/converter/as_to_python_function.hpp:21:84:
>> error: 'type name' declared as a pointer to a reference of type
>> 'boost::uuids::uuid &'
>> static void convert_function_must_take_value_or_const_reference(U(*)(T),
>> int, T* = 0) {}
>>
>> ^
>> /opt/local/include/boost/python/to_python_converter.hpp:88:10: note: in
>> instantiation of template class
>> 'boost::python::converter::as_to_python_function<boost::uuids::uuid &,
>> <anonymous>::uuid_to_python>' requested here
>> &normalized::convert
>> ^
>> ../../python/uuid.cc:77:2: note: in instantiation of member function
>> 'boost::python::to_python_converter<boost::uuids::uuid &,
>> <anonymous>::uuid_to_python, false>::to_python_converter' requested
>> here
>> python::to_python_converter<boost::uuids::uuid&, uuid_to_python>();
>>
>> which suggests that to_python_converter doesn't really like to see
>> references.
>>
>
> Unfortunately the convert function doesn't like non-const references; const
> references (and values) should work fine, though.
They don't though: you can't create a pointer to a const reference.
Wichert.
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