Hi Michael, On 2013-11-14 19:20, Michael Marcin wrote:

It seems a common example for C++11 and variadic templates is a typesafe printf which is supposed to obsolete things like Boost.Format. However there doesn't seem to be one usable out of the box.

If this is really a large improvement shouldn't this facility be in boost?

I have a typesafe printf implementation based on Metaparse. It takes a different approach as the common example for variadic templates. It adds type checking to the non-safe printf and has no runtime overhead. The current implementation generates code using macros instead of variadic templates, but I'm planning to extend it in the near future. You can use it like this: printf(11, "Joe", 13); The library contains wrappers for fprintf and sprintf as well. It also contains a valid_arguments metafunction that takes a format string and a list of argument types and checks if the argument types are valid for the format string. The documentation is here: http://abel.web.elte.hu/mpllibs/safe_printf/index.html Here are examples using it: https://github.com/sabel83/mpllibs/tree/master/libs/safe_printf/example Regards, Ábel