ENH: more consistent use of good() or direct testing instead valid()

applications/utilities/mesh/generation/blockMesh/blockMesh.C

@@ -221,7 +221,7 @@ int main(int argc, char *argv[])
 
     blockMesh blocks(meshDict, regionName, strategy, args.verbose());
 
-    if (!blocks.valid())
+    if (!blocks.good())
     {
         // Could/should be Fatal?
 

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

@@ -979,7 +979,7 @@ int main(int argc, char *argv[])
     // Change the front and back patch types as required
     // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-    word frontBackType(word::null);
+    word frontBackType;
 
     if (isType<extrudeModels::wedge>(model()))
     {

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

@@ -947,7 +947,7 @@ void addZoneSidePatches
 
     forAll(zoneSidePatch, zoneI)
     {
-        if (oneDPolyPatchType != word::null)
+        if (!oneDPolyPatchType.empty())
         {
             // Reuse single empty patch.
             word patchName;

applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/DelaunayMesh/DelaunayMeshI.H

@@ -47,7 +47,7 @@ void Foam::DelaunayMesh<Triangulation>::timeCheck
             << time().elapsedCpuTime() << " s, "
             << "delta " << time().cpuTimeIncrement()<< " s";
 
-        if (description != word::null)
+        if (!description.empty())
         {
             Info<< ", " << description << " ";
         }

applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/PrintTable/PrintTable.C

@@ -33,7 +33,7 @@ template<class KeyType, class DataType>
 Foam::PrintTable<KeyType, DataType>::PrintTable()
 :
     table_(),
-    title_(string::null)
+    title_()
 {}
 
 

applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/conformalVoronoiMesh/conformalVoronoiMeshIO.C

@@ -65,7 +65,7 @@ void Foam::conformalVoronoiMesh::timeCheck
             << runTime.elapsedCpuTime() << " s, "
             << "delta " << runTime.cpuTimeIncrement()<< " s";
 
-        if (description != word::null)
+        if (!description.empty())
         {
             Info<< ", " << description << " ";
         }