Mersenne twister disables streaming for Visual C++

[s.somani@…]

boost/mersenne_twister.hpp disables the streamable concept because boost config machinery says that vc 7.1/8 cannot handle member template friends. This appears not to be the case.

To work around it, I do the following:

This hack is necessary because boost thinks that Visual C++ still cannot handle member function templates It is needed to make mersenne_twister streamable #include <boost/config.hpp> #if defined(BOOST_MSVC) && defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS) # undef BOOST_NO_MEMBER_TEMPLATE_FRIENDS # define FINCAD_BOOST_RNG_HACK #endif

#include <boost/random/mersenne_twister.hpp>

#ifdef FINCAD_BOOST_RNG_HACK # define BOOST_NO_MEMBER_TEMPLATE_FRIENDS # undef FINCAD_BOOST_RNG_HACK #endif

I don't know how you would fix it for the twister. It really sounds like a config machinery issue but it affects the mersenne twister code negatively.

[Richard Webb <richard.webb@…>]

This also seems to be the case for uniform_int - removing the

#if !defined(BOOST_NO_OPERATORS_IN_NAMESPACE) && !defined(BOOST_NO_MEMBER_TEMPLATE_FRIENDS)

around the streaming operators in uniform_int.hpp allows me to stream a uniform_int in and out of a std::stringstream in both VC7.1/VC8.

I haven't tried doing this with any other Random classes yet - might be worth a try to see what happens though.

[Steven Watanabe]

(In [51413]) Enable stream operators on msvc. Fixes #1068. Fixes #1691