ENH: driver/parser/scanner for patch expressions

src/finiteVolume/expressions/patch/patchExprFwd.H

@@ -0,0 +1,84 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2019 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM 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.
+
+    OpenFOAM 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 OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Namespace
+    Foam::expressions::patchExpr
+
+Description
+    Namespace for patch expressions parsing and evaluation
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef expressions_patchExprFwd_H
+#define expressions_patchExprFwd_H
+
+namespace Foam
+{
+namespace expressions
+{
+namespace patchExpr
+{
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+// Forward Declarations
+class parser;
+class scanner;
+class parseDriver;
+union scanToken;
+
+//- Static debugging option
+extern int debug;
+
+
+//- The field association for patch expressions (mutually exclusive)
+enum FieldAssociation : unsigned char
+{
+    NO_DATA = 0,         //!< No data
+    POINT_DATA = 1,      //!< Point data
+    SURFACE_DATA = 2     //!< Surface data
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace patchExpr
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+//- Typedef for patchExpr parseDriver
+typedef patchExpr::parseDriver patchExprDriver;
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+} // End namespace expressions
+} // End namespace Foam
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //