boost/variant/detail/initializer.hpp does not supress C4503 warnings

[8th.realm@…]

After upgrading from 1.53, my project is littered with warning C4503. This warning is typically suppressed in boost/config/compiler/visualc.hpp, but it seems boost variant no longer uses said file.

Compiled using VS2010

[8th.realm@…]

Example of warnings seen

[Antony Polukhin]

boost/config/compiler/visualc.hpp is included via boost/config.hpp so this warning must be suppressed.

Could you provide some test case to reproduce the error?

[john.tytgat@…]

FYI, we had exactly the same issue and after investigation it turned out this was because of some legacy hack in our codebase to suppress a C4244 warning when including boost/thread/mutex.hpp (which seems to longer be relevant with VS2013/boost 1.59):

#pragma warning(push)
#pragma warning(disable: 4244)
#include <boost/thread/mutex.hpp>
#pragma warning(pop)

This made that the C4503 warning disable in boost/config.hpp got undone so that made we got those warnings back when include/using other boost components. Maybe the original ticket submitter had the same issue ?

[Antony Polukhin]

Does the warning still appears?

[Antony Polukhin]

A correct solution would be to fix that annoying behavior in the compiler. Otherwise it could be fixed by enabling variadic templates usage in boost::variant for MSVC. Unfortunately ​MSVC is not ready yet. Waiting for next MSVC.