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lines 136-188 of file: include/cppad/example/valvector/class.hpp
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   {xrst_begin valvector_ctor}
   {xrst_spell
      initializer
      sj
   }

   The valvector Constructors
   ##########################
   Creates a valvector (called *x* below).

   Syntax
   ******
   | ``valvector`` *x*
   | ``valvector`` *x*( *s* )
   | ``valvector`` *x*( *v* )
   | ``valvector`` *x*( { *s0* , *s1* , ... } )

   Default
   *******
   The default constructor (no argument)
   creates the valvector *x* with one element using the
   :ref:`valvector@scalar_type` default constructor.

   Scalar
   ******
   The scalar constructor (argument is *s* )
   creates the valvector *x* with one element that is equal to
   *scalar_type* ( *s* ), where
   *s* has type :ref:`valvector@scalar_type` ,
   `int``, ``long int``, ``double``, ``long_double`` or ``size_t`` .

   Vector
   ******
   The vector constructor (argument is *v*)
   creates a copy of the valvector *v* .

   List
   ****
   In the standard initializer list constructor
   ( argument is { *s0* , *s1* , .. } )
   *s0* , *s1* , have valvector :ref:`valvector@scalar_type` .
   This create a valvector with size equal the length of the list
   and j-th element equal to *sj* .

   {xrst_toc_hidden
      example/valvector/ctor.cpp
   }
   Example
   =======
   The file :ref:`valvector_ctor.cpp-name` is an example and test of these
   constructors.

   {xrst_end valvector_ctor}