ENH: add dictionaryContent wrapper

STYLE: adjust wording of age-warning

src/OpenFOAM/db/dictionary/dictionaryContent/dictionaryContent.H

+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2021 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/>.
+
+Class
+    Foam::dictionaryContent
+
+Description
+    A wrapper for dictionary content, \em without operators that could
+    affect inheritance patterns.
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef dictionaryContent_H
+#define dictionaryContent_H
+
+#include "dictionary.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+/*---------------------------------------------------------------------------*\
+                      Class dictionaryContent Declaration
+\*---------------------------------------------------------------------------*/
+
+class dictionaryContent
+{
+    // Private Data
+
+        //- The dictionary content
+        dictionary dict_;
+
+public:
+
+    // Constructors
+
+        //- Default construct
+        dictionaryContent() = default;
+
+        //- Copy construct
+        dictionaryContent(const dictionaryContent&) = default;
+
+        //- Move construct
+        dictionaryContent(dictionaryContent&&) = default;
+
+        //- Copy construct from dictionary
+        explicit dictionaryContent(const dictionary& dict)
+        :
+            dict_(dict)
+        {}
+
+        //- Move construct from dictionary
+        explicit dictionaryContent(dictionary&& dict)
+        :
+            dict_(std::move(dict))
+        {}
+
+
+    //- Destructor
+    virtual ~dictionaryContent() = default;
+
+
+    // Member Functions
+
+        //- Read-access to the content
+        const dictionary& dict() const noexcept
+        {
+            return dict_;
+        }
+
+        //- Copy assign new content
+        void dict(const dictionary& dict)
+        {
+            dict_ = dict;
+        }
+
+        //- Move assign new content
+        void dict(dictionary&& dict)
+        {
+            dict_ = std::move(dict);
+        }
+
+
+    // Operators
+
+        //- No copy assignment
+        void operator=(const dictionaryContent&) = delete;
+
+        //- No move assignment
+        void operator=(dictionaryContent&&) = delete;
+};
+
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //

src/OpenFOAM/db/error/error.C

@@ -6,7 +6,7 @@
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
     Copyright (C) 2011-2014 OpenFOAM Foundation
-    Copyright (C) 2015-2020 OpenCFD Ltd.
+    Copyright (C) 2015-2021 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -49,7 +49,7 @@ void Foam::error::warnAboutAge(const char* what, const int version)
         // Warning for things that predate the YYMM versioning
         // (eg, 240 for version 2.4)
         std::cerr
-            << "    This " << what << " is considered to be VERY old!\n"
+            << "    This " << what << " is very old.\n"
             << std::endl;
     }
     else if (version < foamVersion::api)
@@ -62,8 +62,7 @@ void Foam::error::warnAboutAge(const char* what, const int version)
         );
 
         std::cerr
-            << "    This " << what << " is deemed to be " << months
-            << " months old.\n"
+            << "    This " << what << " is " << months << " months old.\n"
             << std::endl;
     }
     // No warning for (foamVersion::api < version).