Using C++11 std::tuple

A snippet of C++ unit test code showing how to use std::tuple. Using enums to help index the std::get function that is used to retrieve tuple values. Note that std::tuple_size class is used to get the value (size) of the typedef Tuple_t.

 #include <UnitTest++.h>  
 #include <tuple>  
 SUITE(TUPLES){  
   TEST(Tuples) {  
     enum TupleIndex {MEAN, STDDEV, SIZE};  
     typedef std::tuple<double,double> Tuple_t;  
     CHECK_EQUAL( SIZE, std::tuple_size<Tuple_t>::value );  
   
     Tuple_t T1( 99.0, 0.5);  
     CHECK_CLOSE( 99.0, std::get<MEAN  >(T1), 1e-09);  
     CHECK_CLOSE(  0.5, std::get<STDDEV>(T1), 1e-09);  
 #if 0  
     //Out of Range ... caught at compile time.  
     //g++ error message not so helpful.  
     std::get<SIZE>(T1);  
 #endif  
   }  
 }