File where.hxx¶

A set of functions which choose between two values

Copyright 2010 B.D.Dudson, S.Farley, M.V.Umansky, X.Q.Xu

Contact: Ben Dudson, bd512@york.ac.uk

This file is part of BOUT++.

BOUT++ is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

BOUT++ is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with BOUT++. If not, see http://www.gnu.org/licenses/.

Functions

template<class T, class U, class V, class ResultType = typename bout::utils::EnableIfField<T, U, V>>
auto where(const T &test, const U &gt0, const V &le0)

For each point, choose between two inputs based on a third input

Parameters
• test: The value which determines which input to use
• gt0: Uses this value if test > 0.0
• le0: Uses this value if test <= 0.0

template<class T, class U, class ResultType = typename bout::utils::EnableIfField<T, U>>
auto where(const T &test, const U &gt0, BoutReal le0)
template<class T, class V, class ResultType = typename bout::utils::EnableIfField<T, V>>
auto where(const T &test, BoutReal gt0, const V &le0)
template<class T, class ResultType = T>
auto where(const T &test, BoutReal gt0, BoutReal le0)