The BOOST_PP_TUPLE_REPLACE macro
      replaces an element in a tuple.
    Usage
     BOOST_PP_TUPLE_REPLACE(
tuple, 
i, 
elem)
      
(v) 
    Arguments
    
      - tuple
-  A tuple to replace an element in. 
- i
-  The zero-based position in tuple of the element to be
        replaced.  Valid values range from 0 to BOOST_PP_TUPLE_SIZE(tuple)
        - 1.
- elem
-  The replacement element. 
Remarks
     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_REPLACE_D.
    See Also
    
    Requirements
    
    Sample Code
    
    
     © Copyright Edward Diener 2013