DOKK / manpages / debian 10 / librheolef-dev / compose.4rheolef.en
compose(4rheolef) rheolef-7.0 compose(4rheolef)

compose - a n-ary function with n fields

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.

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);

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.

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

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.

rheolef-7.0 rheolef-7.0