functionObjects: Added regionFunctionObject and fvMeshFunctionObject intermediate base-classes

to simplify writing common functionObjects and avoid unnecessary code duplication

src/OpenFOAM/db/functionObjects/writeFile/writeFile.C

@@ -100,20 +100,12 @@ Foam::Omanip<int> Foam::functionObjects::writeFile::valueWidth
 Foam::functionObjects::writeFile::writeFile
 (
     const word& name,
-    const Time& t,
+    const Time& runTime,
     const dictionary& dict,
     const word& prefix
 )
 :
-    functionObject(name),
-    time_(t),
-    obr_
-    (
-        time_.lookupObject<objectRegistry>
-        (
-            dict.lookupOrDefault("region", polyMesh::defaultRegion)
-        )
-    ),
+    regionFunctionObject(name, runTime, dict),
     prefix_(prefix),
     log_(true)
 {}
@@ -127,9 +119,7 @@ Foam::functionObjects::writeFile::writeFile
     const word& prefix
 )
 :
-    functionObject(name),
-    time_(obr.time()),
-    obr_(obr),
+    regionFunctionObject(name, obr, dict),
     prefix_(prefix),
     log_(true)
 {}

src/OpenFOAM/db/functionObjects/writeFile/writeFile.H

@@ -28,8 +28,8 @@ Description
     functionObject base class for writing single files
 
 See Also
+    Foam::regionFunctionObject
     Foam::functionObject
-    Foam::OutputFilterFunctionObject
 
 SourceFiles
     functionObjectFile.C
@@ -39,7 +39,7 @@ SourceFiles
 #ifndef functionObjects_writeFile_H
 #define functionObjects_writeFile_H
 
-#include "functionObject.H"
+#include "regionFunctionObject.H"
 #include "Time.H"
 #include "IOmanip.H"
 
@@ -56,19 +56,13 @@ namespace functionObjects
 
 class writeFile
 :
-    public functionObject
+    public regionFunctionObject
 {
 
 protected:
 
     // Protected data
 
-        //- Reference to the Time
-        const Time& time_;
-
-        //- Reference to the objectRegistry
-        const objectRegistry& obr_;
-
         //- Prefix
         const word prefix_;