NAME

       compose - a n-ary function with n fields

DESCRIPTION

       Compose a n-ary function f with n fields.

               geo omega ("circle");
               space Xh (omega, "P1");
               field uh (Xh, 1.0);
               field vh = interpolate (compose(f,uh));

       The  compose  operator  could be used in all non-linear expressions involved in either the
       interpolate or the integrate functions  (see  interpolate(4)  and  integrate(4)).   The  f
       function could be either a usual function or a functor.

CHARACTERISTIC

       The  compose  function  supports also the characteristic algorithm (see characteristic(2))
       used for convection.

               characteristic X (-delta_t*uh);
               test v (Xh);
               field lh = integrate (compose(uh,X)*v);

IMPLEMENTATION

       The n-arity bases on the variadic template feature of the 2011  c++  normalisation.   When
       this feature is not available, only unary and binary functions are supported.

SEE ALSO

       interpolate(4), integrate(4), characteristic(2)

COPYRIGHT

       Copyright  (C) 2000-2018 Pierre Saramito <Pierre.Saramito@imag.fr> GPLv3+: GNU GPL version
       3 or later <http://gnu.org/licenses/gpl.html>.  This is free software:  you  are  free  to
       change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.