Tiers are tuples, where all elements are of non-const reference types. boost::tuples::tie is like a std::make_pair for tuples.


#include <cassert>

#include <string>

#include <boost/tuple/tuple.hpp>



int main()

{

  int i = 0;

  double d = 0.0;

  std::string s;

  boost::tuples::tie(i,d,s) = boost::tuples::make_tuple(1,1.1,"x");

  assert(i == 1);

  assert(d == 1.1);

  assert(s == "x");

}

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(C++) boost::tuples::tie