The BOOST_PP_TUPLE_INSERT macro
      inserts an element into an tuple.
    Usage
     BOOST_PP_TUPLE_INSERT(
tuple, 
i, 
elem)
      
(v) 
    Arguments
    
      - tuple
-  The tuple into which an element is to be inserted. 
- i
-  The zero-based position in tuple where an element is to be
        inserted.  Valid values range from 0 to BOOST_PP_TUPLE_SIZE(tuple).
- elem
-  The element to insert. 
Remarks
     This macro inserts elem before the element at index i.
    
     If the operation attempts to create an tuple that is larger
      than BOOST_PP_LIMIT_TUPLE, the result is undefined.
     This macro uses BOOST_PP_WHILE interally.  Therefore, to
      use the d parameter passed from other macros that use BOOST_PP_WHILE,
      see BOOST_PP_TUPLE_INSERT_D.
    See Also
    
    Requirements
    
    Sample Code
    
    
     © Copyright Edward Diener 2013