As recommended (thanks Steve!), I have disabled VC9's C4512 warning to get a canonical Boost.Variant example to compile (in VC9) without warnings: #pragma warning( push ) #pragma warning( disable : 4512 ) #include <boost/variant.hpp> #pragma warning( pop ) #include <iostream> using namespace std; struct vis : public boost::static_visitor<> { void operator()( int & ) const { cout << "int" << endl; } void operator()( string & ) const { cout << "string" << endl; } }; int main( int, char * ) { boost::variant< int, string > v; boost::apply_visitor( vis(), v ); return 0; } *If* this warning is truly harmless, should this be considered a bug in Boost.Variant? Shouldn't Boost.Variant disable benign warnings in a compiler-independent way? Or at least shouldn't the Boost.Variant docs be updated? Or is this warning part of Boost.Variant's design? If so is there any way I can change my code above to compile without warnings other without explicitly suppressing warnings? Any Boost.Variant authors/maintainers care to comment? John Fearnside -----Original Message----- AMDG hfye-wila@spamex.com wrote:
Does Boost.Variant require certain warnings to be disabled? The following program generates a warning for me with VC9:
Warning 4512 is almost always harmless. It's usually caused by structs containing reference members. You're best off disabling it. In Christ, Steven Watanabe