STYLE: make polyMesh constructor explicit

- use polyMesh::defaultRegion instead of fvMesh::defaultRegion and
  others via static inheritance. (92 vs ~25 occurrences)

applications/utilities/mesh/advanced/refinementLevel/refinementLevel.C

@@ -212,7 +212,7 @@ int main(int argc, char *argv[])
     (
         IOobject
         (
-            fvMesh::defaultRegion,
+            polyMesh::defaultRegion,
             runTime.timeName(),
             runTime,
             IOobject::NO_READ,

applications/utilities/mesh/conversion/foamMeshToFluent/fluentFvMesh.H

@@ -56,7 +56,7 @@ public:
     // Constructors
 
         //- Construct from IOobject
-        fluentFvMesh(const IOobject& io);
+        explicit fluentFvMesh(const IOobject& io);
 
 
     // Member functions

applications/utilities/mesh/conversion/foamMeshToFluent/foamMeshToFluent.C

@@ -59,7 +59,7 @@ int main(int argc, char *argv[])
     (
         IOobject
         (
-            fluentFvMesh::defaultRegion,
+            polyMesh::defaultRegion,
             runTime.constant(),
             runTime
         )

applications/utilities/mesh/generation/extrude/extrudeMesh/extrudeMesh.C

@@ -233,7 +233,7 @@ int main(int argc, char *argv[])
     }
     else
     {
-        regionName = fvMesh::defaultRegion;
+        regionName = polyMesh::defaultRegion;
         Info<< "Create mesh for time = "
             << runTimeExtruded.timeName() << nl << endl;
     }
@@ -787,7 +787,7 @@ int main(int argc, char *argv[])
             (
                 IOobject
                 (
-                    extrudedMesh::defaultRegion,
+                    polyMesh::defaultRegion,
                     runTimeExtruded.constant(),
                     runTimeExtruded
                 ),

applications/utilities/mesh/manipulation/mirrorMesh/mirrorMesh.C

@@ -73,7 +73,7 @@ int main(int argc, char *argv[])
     (
         IOobject
         (
-            mirrorFvMesh::defaultRegion,
+            polyMesh::defaultRegion,
             runTime.constant(),
             runTime
         ),

applications/utilities/parallelProcessing/redistributePar/redistributePar.C

@@ -2905,7 +2905,7 @@ int main(int argc, char *argv[])
             const word& regionName = regionNames[regioni];
             const fileName meshSubDir
             (
-                regionName == fvMesh::defaultRegion
+                regionName == polyMesh::defaultRegion
               ? fileName(polyMesh::meshSubDir)
               : regionNames[regioni]/polyMesh::meshSubDir
             );

applications/utilities/preProcessing/changeDictionary/changeDictionary.C

@@ -499,7 +499,7 @@ int main(int argc, char *argv[])
 
 
         fileName regionPrefix;
-        if (regionName != fvMesh::defaultRegion)
+        if (regionName != polyMesh::defaultRegion)
         {
             regionPrefix = regionName;
         }

applications/utilities/preProcessing/createExternalCoupledPatchGeometry/createExternalCoupledPatchGeometry.C

@@ -89,7 +89,7 @@ int main(int argc, char *argv[])
     #include "setRootCase.H"
     #include "createTime.H"
 
-    wordList regionNames(1, fvMesh::defaultRegion);
+    wordList regionNames(1, polyMesh::defaultRegion);
     if (!args.readIfPresent("region", regionNames.first()))
     {
         args.readIfPresent("regions", regionNames);

applications/utilities/preProcessing/mapFields/mapFields.C

@@ -291,7 +291,7 @@ int main(int argc, char *argv[])
     const fileName caseDirSource = casePath.name();
 
     Info<< "Source: " << rootDirSource << " " << caseDirSource << endl;
-    word sourceRegion = fvMesh::defaultRegion;
+    word sourceRegion = polyMesh::defaultRegion;
     if (args.found("sourceRegion"))
     {
         sourceRegion = args["sourceRegion"];
@@ -299,7 +299,7 @@ int main(int argc, char *argv[])
     }
 
     Info<< "Target: " << rootDirTarget << " " << caseDirTarget << endl;
-    word targetRegion = fvMesh::defaultRegion;
+    word targetRegion = polyMesh::defaultRegion;
     if (args.found("targetRegion"))
     {
         targetRegion = args["targetRegion"];

applications/utilities/preProcessing/mapFieldsPar/mapFieldsPar.C

@@ -219,14 +219,14 @@ int main(int argc, char *argv[])
     const fileName caseDirSource = casePath.name();
 
     Info<< "Source: " << rootDirSource << " " << caseDirSource << endl;
-    word sourceRegion = fvMesh::defaultRegion;
+    word sourceRegion = polyMesh::defaultRegion;
     if (args.readIfPresent("sourceRegion", sourceRegion))
     {
         Info<< "Source region: " << sourceRegion << endl;
     }
 
     Info<< "Target: " << rootDirTarget << " " << caseDirTarget << endl;
-    word targetRegion = fvMesh::defaultRegion;
+    word targetRegion = polyMesh::defaultRegion;
     if (args.readIfPresent("targetRegion", targetRegion))
     {
         Info<< "Target region: " << targetRegion << endl;