Joaquín Mª López Muñoz writes:
The following simple snippet ICEs in MSVC 6.5:
#include <boost/mpl/vector_c.hpp> #include <boost/mpl/assert.hpp>
template<int N> struct foo:boost::mpl::vector_c<int,N> { };
Yet, this version (where assert.hpp is included first) compiles fine:
#include <boost/mpl/assert.hpp> #include <boost/mpl/vector_c.hpp>
template<int N> struct foo:boost::mpl::vector_c<int,N> { };
The situation is the same if I change vector_c for list_c. With plain vectors and lists, however, everytihng's fine. ?????
This has little to do with MPL; non-type integer template parameters are generally "unsafe" on MSVC 6.x: namespace std { template< typename Char > struct string; } void foo(std::string<char>); template< int C > struct arg; // ICE here MPL avoids the problem internally by using the following workaround: #include <boost/mpl/aux_/nttp_decl.hpp> ... template< BOOST_MPL_AUX_NTTP_DECL(int, C) > struct arg; // OK HTH, -- Aleksey Gurtovoy MetaCommunications Engineering