Boost C++ Application Development Cookbook - Second Edition

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A tuple works as fast as std::pair (it does not allocate memory on a heap and has no virtual functions). The C++ committee found this class to be very useful and it was included in the standard library. You can find it in a C++11 compatible implementation in the header file <tuple> (don't forget to replace all the boost:: namespaces with std::).

The standard library version of tuple must have multiple micro optimizations and typically provides a slightly better user experience. However, there is no guarantee on the order of construction of tuple elements, so, if you need a tuple that constructs its elements starting from the first, you have to use the boost::tuple:

#include <boost/tuple/tuple.hpp>#include <iostream>template ...