The BOOST_PP_TUPLE_POP_BACK macro
      pops an element from the end of an tuple.
    Usage
     BOOST_PP_TUPLE_POP_BACK(
tuple) 
(v) 
    Arguments
    
      - tuple
- The tuple to pop an element from.
Remarks
     This macro returns tuple
      after removing the last element.  If tuple has only a single
      element, it remains unchanged since a tuple must have at
      least one element.
     This macro uses BOOST_PP_REPEAT internally.  Therefore,
      to use the z parameter passed from other macros that use BOOST_PP_REPEAT,
      see BOOST_PP_TUPLE_POP_BACK_Z 
    See Also
    
    Requirements
    
    Sample Code
    
    
     © Copyright Edward Diener 2013