Hi. I am porting Fusion, Joel de Guzmans new tuple library to MSVC 6.5 and VC 7.0. Several of the testcases ICEs on MSVC 6.5. I traced the problems back to integral_c's operator int() Problem: When the template expressions gets too complicated, MSVC is unable to handle inlined functions inside a type computer struct. Solution: Place the function body outside of the struct. The relevant lines: operator AUX_WRAPPER_VALUE_TYPE() const #if BOOST_WORKAROUND(BOOST_MSVC,==1200) ; #else { return static_cast<AUX_WRAPPER_VALUE_TYPE>(this->value); } #endif }; #if BOOST_WORKAROUND(BOOST_MSVC,==1200) template< AUX_WRAPPER_PARAMS(N) > AUX_WRAPPER_INST(N)::operator AUX_WRAPPER_VALUE_TYPE() const { return static_cast<AUX_WRAPPER_VALUE_TYPE>(this->value); } #endif This change fixed most of the remaining (known) issues with Fusion & MSVC Is it OK if I check in these changes? -- Peder Holt