Unpacking Tuples in C++14 (aherrmann.github.io)

for a moment I thought that this would allow in C++ to create a 'python dictionary' like data structure for a run-time provided array of JSON objects (as an example), whose schema was known at compile time.

However tuples, do not appear to enable that.

The lengths one has to go in order to do unpack tuples show how a lot of things in modern C++ are built on top of an old boat, sadly.

Without pattern matching - ie structural decomposition - this is prohibitively unreadable and negates any benefits of better code reuse.

If I just want to unpack a function's tuple result, I use "std::tie":

  tuple<int, bool, char> t = make_tuple(1, true, 'a');
  int  n = get<0>(t);
  bool b = get<1>(t);
  char c = get<2>(t);

can be written as

  int  n;
  bool b;
  char c;
  std::tie(n,b,c) = make_tuple(1, true, 'a');

This is not necessarily better or more dynamic, but at least it looks more pythonic (to me). One can even write

  std::tie(n,b,std::ignore) = make_tuple(1, true, 'a');

if not all results are needed!