----------------------------------------------------------------
lines 456-478 of file: include/cppad/example/valvector/class.hpp
----------------------------------------------------------------

   {xrst_begin valvector_unary_op}

   The valvector Numeric Unary Operators
   #####################################
   Returns the element-by-element result of the unary operators for
   this valvector.

   Prototype
   *********
   {xrst_literal ,
      // BEGIN_PLUS , END_PLUS
      // BEGIN_MINUS , END_MINUS
   }

   {xrst_toc_hidden
      example/valvector/unary_op.cpp
   }
   Example
   =======
   The file :ref:`valvector_unary_op.cpp-name` is an example and test of the
   valvector unary operators.

   {xrst_end valvector_unary_op}