Add trivial class SingleWellState with bhp and thp

opm/simulators/wells/SingleWellState.hpp

@@ -0,0 +1,42 @@
+/*
+  Copyright 2021 Equinor ASA
+
+  This file is part of the Open Porous Media project (OPM).
+
+  OPM is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  OPM 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef OPM_SINGLE_WELL_STATE_HEADER_INCLUDED
+#define OPM_SINGLE_WELL_STATE_HEADER_INCLUDED
+
+
+namespace Opm {
+
+class SingleWellState {
+public:
+    double bhp{0};
+    double thp{0};
+
+
+    void init_timestep(const SingleWellState& other);
+    void shut();
+    void stop();
+};
+
+
+}
+
+
+
+#endif