Re: [Boost-users] How to force a compile failure if a templateparameter isn't floating-point

template <typename FPT> std::string f(FPT v) { ... }

At present I have added a run-time check, but doesn't prevent compilation (and instantiation).

if (boost::is_floating_point<FPT>::value; == false) { assert fail or something and/or return " "Type Not floating point!"; }

I don't see how enable_if can help either.

template <typename FPT> typename enable_if::type f(FPT v) { ... } If FTP is not a built in floating point type, then no overload for f() will be found and you'll get a compiler error. HTH, John.