STYLE: rename Polynomial method evaluate() to value() for consistency with DataEntry

STYLE: move DataEntry to OpenFOAM/primitives/functions

src/OpenFOAM/primitives/functions/DataEntry/Constant/Constant.H

@@ -0,0 +1,130 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2004-2011 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+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/>.
+
+Class
+    Foam::Constant
+
+Description
+    Templated basic entry that holds a constant value.
+
+    Usage - for entry <entryName> having the value <value>:
+    @verbatim
+        <entryName>    constant  <value>
+    @endverbatim
+
+SourceFiles
+    Constant.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef Constant_H
+#define Constant_H
+
+#include "DataEntry.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+template<class Type>
+class Constant;
+
+template<class Type>
+Ostream& operator<<(Ostream&, const Constant<Type>&);
+
+/*---------------------------------------------------------------------------*\
+                           Class Constant Declaration
+\*---------------------------------------------------------------------------*/
+
+template<class Type>
+class Constant
+:
+    public DataEntry<Type>
+{
+    // Private data
+
+        //- Constant value
+        Type value_;
+
+
+    // Private Member Functions
+
+        //- Disallow default bitwise assignment
+        void operator=(const Constant<Type>&);
+
+
+public:
+
+    // Runtime type information
+    TypeName("constant");
+
+
+    // Constructors
+
+        //- Construct from entry name and Istream
+        Constant(const word& entryName, Istream& is);
+
+        //- Copy constructor
+        Constant(const Constant<Type>& cnst);
+
+        //- Construct and return a clone
+        virtual tmp<DataEntry<Type> > clone() const
+        {
+            return tmp<DataEntry<Type> >(new Constant<Type>(*this));
+        }
+
+
+    //- Destructor
+    virtual ~Constant();
+
+
+    // Member Functions
+
+        //- Return constant value
+        Type value(const scalar) const;
+
+        //- Integrate between two values
+        Type integrate(const scalar x1, const scalar x2) const;
+
+
+    //- Ostream Operator
+    friend Ostream& operator<< <Type>(Ostream&, const Constant<Type>&);
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#ifdef NoRepository
+#   include "Constant.C"
+#endif
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //