C++Now 2016

C++17 adds new language features that might affect the design and implementation of 'std::tuple', such as fold expressions for templates. Several other features still pending as this proposal is written, such as concepts and implicit comparison operators. In addition, the standard library itself pushes the interface of the 'tuple' template itself, while providing additional metaprogramming utilities that might help both the implementation, and users. This session will review the tuple interface, as specified for C++17, highlighting any changes since C++11 and C++14. It will then look into the design of several implementations of tuple, explored through several testing and benchmarking scenarios, before looking to draw conclusions. Note that the code shown in this session will require a recent version of a C++ compiler that implements an experimental C++17 mode. The latest Clang and gcc compilers should be capable, although the latest development compilers may be needed for new language features added in 2016.