Simplify checking of container (List/HashTable, strings) sizes

- can use 'XX.empty()' instead of 'XX.size() == 0', 'XX.size() < 1' or
  'XX.size() <= 0' or for simpler coding.
  It also has the same number of characters as '!XX.size()' and /might/ be
  more readable

- many size checking had 'XX.size() > 0', 'XX.size() != 0', or 'XX.size() >= 1'
  when a simple 'XX.size()' suffices

applications/solvers/combustion/PDRFoam/PDRFoamAutoRefine.C

@@ -26,7 +26,7 @@ Application
     PDRFoam
 
 Description
-    Compressible premixed/partially-premixed combustion solver with turbulence 
+    Compressible premixed/partially-premixed combustion solver with turbulence
     modelling.
 
     Combusting RANS code using the b-Xi two-equation model.
@@ -121,7 +121,8 @@ scalar StCoNum = 0.0;
             // Test : disable refinement for some cells
             PackedList<1>& protectedCell =
                 refCast<dynamicRefineFvMesh>(mesh).protectedCell();
-            if (protectedCell.size() == 0)
+
+            if (protectedCell.empty())
             {
                 protectedCell.setSize(mesh.nCells());
                 protectedCell = 0;
@@ -135,7 +136,7 @@ scalar StCoNum = 0.0;
                 }
             }
 
-            //volScalarField pIndicator("pIndicator", 
+            //volScalarField pIndicator("pIndicator",
             //    p*(fvc::laplacian(p))
             //  / (
             //        magSqr(fvc::grad(p))

applications/utilities/mesh/advanced/autoRefineMesh/autoRefineMesh.C

@@ -413,7 +413,7 @@ bool limitRefinementLevel
         }
     }
 
-    if (addCutCells.size() > 0)
+    if (addCutCells.size())
     {
         // Add cells to cutCells.
 
@@ -479,7 +479,7 @@ void doRefinement
     {
         const labelList& added = addedCells[oldCellI];
 
-        if (added.size() > 0)
+        if (added.size())
         {
             // Give all cells resulting from split the refinement level
             // of the master.
@@ -895,7 +895,7 @@ int main(int argc, char *argv[])
             << "    Selected for refinement :" << cutCells.size() << nl
             << endl;
 
-        if (cutCells.size() == 0)
+        if (cutCells.empty())
         {
             Info<< "Stopping refining since 0 cells selected to be refined ..."
                 << nl << endl;

applications/utilities/mesh/advanced/modifyMesh/modifyMesh.C

@@ -358,18 +358,21 @@ int main(int argc, char *argv[])
     (
         dict.lookup("facesToTriangulate")
     );
+
     bool cutBoundary =
-            pointsToMove.size() > 0
-         || edgesToSplit.size() > 0
-         || facesToTriangulate.size() > 0;
+    (
+        pointsToMove.size()
+     || edgesToSplit.size()
+     || facesToTriangulate.size()
+    );
 
     List<Pair<point> > edgesToCollapse(dict.lookup("edgesToCollapse"));
 
-    bool collapseEdge = edgesToCollapse.size() > 0;
+    bool collapseEdge = edgesToCollapse.size();
 
     List<Pair<point> > cellsToPyramidise(dict.lookup("cellsToSplit"));
 
-    bool cellsToSplit = cellsToPyramidise.size() > 0;
+    bool cellsToSplit = cellsToPyramidise.size();
 
     //List<Tuple<pointField,point> >
     //  cellsToCreate(dict.lookup("cellsToCreate"));
@@ -523,7 +526,7 @@ int main(int argc, char *argv[])
         Info<< nl << "There was a problem in one of the inputs in the"
             << " dictionary. Not modifying mesh." << endl;
     }
-    else if (cellToPyrCentre.size() > 0)
+    else if (cellToPyrCentre.size())
     {
         Info<< nl << "All input cells located. Modifying mesh." << endl;
 
@@ -555,7 +558,7 @@ int main(int argc, char *argv[])
         Info << "Writing modified mesh to time " << runTime.value() << endl;
         mesh.write();
     }
-    else if (edgeToPos.size() > 0)
+    else if (edgeToPos.size())
     {
         Info<< nl << "All input edges located. Modifying mesh." << endl;
 

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

@@ -336,7 +336,7 @@ int main(int argc, char *argv[])
     )
     {}
 
-    if (refCells.size() > 0)
+    if (refCells.size())
     {
         Info<< "Collected " << refCells.size() << " cells that need to be"
             << " refined to get closer to overall 2:1 refinement level limit"

applications/utilities/mesh/advanced/splitCells/splitCells.C

@@ -652,7 +652,7 @@ int main(int argc, char *argv[])
         // Remove cut cells from cellsToCut  (Note:only relevant if -readSet)
         forAll(cuts.cellLoops(), cellI)
         {
-            if (cuts.cellLoops()[cellI].size() > 0)
+            if (cuts.cellLoops()[cellI].size())
             {
                 //Info<< "Removing cut cell " << cellI << " from wishlist"
                 //    << endl;

applications/utilities/mesh/conversion/cfx4ToFoam/cfx4ToFoam.C

@@ -584,7 +584,7 @@ int main(int argc, char *argv[])
 
     forAll (rawPatches, patchI)
     {
-        if (rawPatches[patchI].size() > 0 && cfxPatchTypes[patchI] != "BLKBDY")
+        if (rawPatches[patchI].size() && cfxPatchTypes[patchI] != "BLKBDY")
         {
             // Check if this name has been already created
             label existingPatch = -1;

applications/utilities/mesh/conversion/fluentMeshToFoam/fluentMeshToFoam.L

@@ -1,4 +1,4 @@
-/*---------------------------------------------------------------------------*\
+/*--------------------------------*- C++ -*----------------------------------*\
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
@@ -1486,7 +1486,7 @@ int main(int argc, char *argv[])
         }
         defaultBoundaryFaces.shrink();
 
-        if(defaultBoundaryFaces.size() != 0)
+        if (defaultBoundaryFaces.size())
         {
             Warning << " fluent mesh has " << defaultBoundaryFaces.size()
                     << " undefined boundary faces." << endl
@@ -1695,7 +1695,7 @@ int main(int argc, char *argv[])
     // soon negating the need for double output
     if (writeSets)
     {
-        if (cellGroupZoneID.size() > 1 )
+        if (cellGroupZoneID.size() > 1)
         {
             Info<< "Writing cell sets" << endl;
 

applications/utilities/mesh/conversion/gmshToFoam/gmshToFoam.C

@@ -667,7 +667,7 @@ void readCells
 
         const labelList& zCells = zoneCells[zoneI];
 
-        if (zCells.size() > 0)
+        if (zCells.size())
         {
             Info<< "    " << zoneI << '\t' << zCells.size() << endl;
         }
@@ -778,7 +778,7 @@ int main(int argc, char *argv[])
 
     forAll(zoneCells, zoneI)
     {
-        if (zoneCells[zoneI].size() > 0)
+        if (zoneCells[zoneI].size())
         {
             nValidCellZones++;
         }
@@ -910,7 +910,7 @@ int main(int argc, char *argv[])
 
         const labelList& zFaces = zoneFaces[zoneI];
 
-        if (zFaces.size() > 0)
+        if (zFaces.size())
         {
             nValidFaceZones++;
 
@@ -940,7 +940,7 @@ int main(int argc, char *argv[])
 
         forAll(zoneCells, zoneI)
         {
-            if (zoneCells[zoneI].size() > 0)
+            if (zoneCells[zoneI].size())
             {
                 label physReg = zoneToPhys[zoneI];
 
@@ -979,7 +979,7 @@ int main(int argc, char *argv[])
 
         forAll(zoneFaces, zoneI)
         {
-            if (zoneFaces[zoneI].size() > 0)
+            if (zoneFaces[zoneI].size())
             {
                 label physReg = zoneToPhys[zoneI];
 
@@ -1011,7 +1011,7 @@ int main(int argc, char *argv[])
         }
     }
 
-    if (cz.size() > 0 || fz.size() > 0)
+    if (cz.size() || fz.size())
     {
         mesh.addZones(List<pointZone*>(0), fz, cz);
     }

applications/utilities/mesh/conversion/ideasUnvToFoam/ideasUnvToFoam.C

@@ -752,7 +752,7 @@ int main(int argc, char *argv[])
     List<faceList> patchFaceVerts;
 
 
-    if (dofVertIndices.size() > 0)
+    if (dofVertIndices.size())
     {
         // Use the vertex constraints to patch. Is of course bit dodgy since
         // face goes on patch if all its vertices are on a constraint.

applications/utilities/mesh/conversion/netgenNeutralToFoam/netgenNeutralToFoam.C

@@ -242,7 +242,7 @@ int main(int argc, char *argv[])
     }
 
 
-    if (vertsToBoundary.size() > 0)
+    if (vertsToBoundary.size())
     {
         // Didn't find cells connected to boundary faces.
         WarningIn(args.executable())

applications/utilities/mesh/conversion/polyDualMesh/makePolyDualMesh.C

@@ -229,7 +229,7 @@ void simpleMarkFeatures
 
     if (doNotPreserveFaceZones)
     {
-        if (faceZones.size() > 0)
+        if (faceZones.size())
         {
             WarningIn("simpleMarkFeatures(..)")
                 << "Detected " << faceZones.size()
@@ -239,7 +239,7 @@ void simpleMarkFeatures
     }
     else
     {
-        if (faceZones.size() > 0)
+        if (faceZones.size())
         {
             Info<< "Detected " << faceZones.size()
                 << " faceZones. Preserving these by marking their"

applications/utilities/mesh/conversion/polyDualMesh/meshDualiser.C

@@ -38,10 +38,7 @@ Class
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
-namespace Foam
-{
-    defineTypeNameAndDebug(meshDualiser, 0);
-}
+defineTypeNameAndDebug(Foam::meshDualiser, 0);
 
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
@@ -735,7 +732,7 @@ void Foam::meshDualiser::createFacesAroundBoundaryPoint
                 )   << "Walked from face on patch:" << patchI
                     << " to face:" << faceI
                     << " fc:" << mesh_.faceCentres()[faceI]
-                    << " on patch:" << patches.whichPatch(faceI) 
+                    << " on patch:" << patches.whichPatch(faceI)
                     << abort(FatalError);
             }
 
@@ -886,7 +883,7 @@ Foam::meshDualiser::meshDualiser(const polyMesh& mesh)
     faceToDualPoint_(mesh_.nFaces(), -1),
     edgeToDualPoint_(mesh_.nEdges(), -1)
 {}
-  
+
 
 // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
 
@@ -1083,7 +1080,7 @@ void Foam::meshDualiser::setRefinement
     {
         label pointI = multiCellFeaturePoints[i];
 
-        if (pointToDualCells_[pointI].size() > 0)
+        if (pointToDualCells_[pointI].size())
         {
             FatalErrorIn
             (
@@ -1133,7 +1130,7 @@ void Foam::meshDualiser::setRefinement
     // Normal points
     forAll(mesh_.points(), pointI)
     {
-        if (pointToDualCells_[pointI].size() == 0)
+        if (pointToDualCells_[pointI].empty())
         {
             pointToDualCells_[pointI].setSize(1);
             pointToDualCells_[pointI][0] = meshMod.addCell
@@ -1241,7 +1238,7 @@ void Foam::meshDualiser::setRefinement
             const edge& e = mesh_.edges()[edgeI];
 
             // We need a point on the edge if not all cells on both sides
-            // are the same. 
+            // are the same.
 
             const labelList& eCells = mesh_.edgeCells()[edgeI];
 

applications/utilities/mesh/conversion/sammToFoam/readCouples.C

@@ -136,7 +136,7 @@ void sammMesh::readCouples()
 
             forAll (curFaces, faceI)
             {
-                if (curFaces[faceI].size() == 0)
+                if (curFaces[faceI].empty())
                 {
                     zeroSizeFound++;
                 }
@@ -153,7 +153,7 @@ void sammMesh::readCouples()
 
                 forAll (oldFaces, faceI)
                 {
-                    if (oldFaces[faceI].size() > 0)
+                    if (oldFaces[faceI].size())
                     {
                         curFaces[nFaces] = oldFaces[faceI];
 

applications/utilities/mesh/conversion/starToFoam/createCoupleMatches.C

@@ -45,12 +45,11 @@ void starMesh::createCoupleMatches()
     // existing points list
 
     // Estimate the number of cells affected by couple matches
-    const label cellMapSize =
-        min
-        (
-            cellShapes_.size()/10,
-            couples_.size()*2
-        );
+    const label cellMapSize = min
+    (
+        cellShapes_.size()/10,
+        couples_.size()*2
+    );
 
     // Store newly created faces for each cell
     Map<SLList<face> > cellAddedFaces(cellMapSize);
@@ -322,7 +321,7 @@ void starMesh::createCoupleMatches()
 
                                     // A new point is created. Warning:
                                     // using original edge for accuracy.
-                                    // 
+                                    //
                                     coupleFacePoints.append
                                         (P + alpha*curMasterEdge.vec(points_));
                                 }
@@ -338,7 +337,7 @@ void starMesh::createCoupleMatches()
                         // master edge and vice versa. The problem is that
                         // no symmetry exists, i.e. both operations needs
                         // to be done separately for both master and slave
-                        // side. 
+                        // side.
 
                         // Master side
                         // check if the first or second point of slave edge is
@@ -625,11 +624,11 @@ void starMesh::createCoupleMatches()
 
             // Eliminate all zero-length edges
             face newMasterFace(labelList(tmpMasterFace.size(), labelMax));
-          
+
             // insert first point by hand. Careful: the first one is
             // used for comparison to allow the edge collapse across
             // point zero.
-            // 
+            //
             newMasterFace[0] = tmpMasterFace[0];
             label nMaster = 0;
 
@@ -823,7 +822,7 @@ void starMesh::createCoupleMatches()
             // insert first point by hand. Careful: the first one is
             // used for comparison to allow the edge collapse across
             // point zero.
-            // 
+            //
             newSlaveFace[0] = tmpSlaveFace[0];
             label nSlave = 0;
 
@@ -1097,7 +1096,7 @@ void starMesh::createCoupleMatches()
                         << "edges to consider: " << edgesToConsider << endl;
 #                   endif
 
-                    if (edgesToConsider.size() == 0)
+                    if (edgesToConsider.empty())
                     {
                         FatalErrorIn("void starMesh::createCoupleMatches()")
                             << setprecision(12)
@@ -1420,7 +1419,7 @@ void starMesh::createCoupleMatches()
         } // end of arbitrary match
     }
 
-    if (couples_.size() > 0)
+    if (couples_.size())
     {
         // Loop through all cells and reset faces for removal to zero size
         const labelList crfToc = cellRemovedFaces.toc();
@@ -1442,7 +1441,7 @@ void starMesh::createCoupleMatches()
                 cellFaces_[curCell][curRemovedFacesIter()].setSize(0);
             }
 
-            if (curRemovedFaces.size() > 0)
+            if (curRemovedFaces.size())
             {
                 // reset the shape pointer to unknown
                 cellShapes_[curCell] = cellShape(*unknownPtr_, labelList(0));
@@ -1468,7 +1467,7 @@ void starMesh::createCoupleMatches()
             // copy original faces that have not been removed
             forAll (oldFaces, faceI)
             {
-                if (oldFaces[faceI].size() > 0)
+                if (oldFaces[faceI].size())
                 {
                     newFaces[nNewFaces] = oldFaces[faceI];
                     nNewFaces++;
@@ -1491,7 +1490,7 @@ void starMesh::createCoupleMatches()
             // reset the size of the face list
             newFaces.setSize(nNewFaces);
 
-            if (curAddedFaces.size() > 0)
+            if (curAddedFaces.size())
             {
                 // reset the shape pointer to unknown
                 cellShapes_[curCell] = cellShape(*unknownPtr_, labelList(0));

applications/utilities/mesh/conversion/starToFoam/starMesh.C

@@ -264,7 +264,7 @@ starMesh::starMesh
 
     readCouples();
 
-    if (couples_.size() > 0)
+    if (couples_.size())
     {
         createCoupleMatches();
     }

applications/utilities/mesh/conversion/tetgenToFoam/tetgenToFoam.C

@@ -160,7 +160,7 @@ int main(int argc, char *argv[])
     {
         nodeStream.getLine(line);
     }
-    while((line.size() > 0) && (line[0] == '#'));
+    while (line.size() && line[0] == '#');
 
     IStringStream nodeLine(line);
 
@@ -193,7 +193,7 @@ int main(int argc, char *argv[])
         {
             nodeStream.getLine(line);
 
-            if ((line.size() > 0) && (line[0] != '#'))
+            if (line.size() && line[0] != '#')
             {
                 IStringStream nodeLine(line);
 
@@ -237,7 +237,7 @@ int main(int argc, char *argv[])
     {
         eleStream.getLine(line);
     }
-    while((line.size() > 0) && (line[0] == '#'));
+    while (line.size() && line[0] == '#');
 
     IStringStream eleLine(line);
 
@@ -281,7 +281,7 @@ int main(int argc, char *argv[])
     {
         eleStream.getLine(line);
 
-        if ((line.size() > 0) && (line[0] != '#'))
+        if (line.size() && line[0] != '#')
         {
             IStringStream eleLine(line);
 
@@ -356,7 +356,7 @@ int main(int argc, char *argv[])
         {
             faceStream.getLine(line);
         }
-        while((line.size() > 0) && (line[0] == '#'));
+        while (line.size() && line[0] == '#');
 
         IStringStream faceLine(line);
 
@@ -398,7 +398,7 @@ int main(int argc, char *argv[])
         {
             faceStream.getLine(line);
 
-            if ((line.size() > 0) && (line[0] != '#'))
+            if (line.size() && line[0] != '#')
             {
                 IStringStream faceLine(line);
 

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

@@ -118,7 +118,7 @@ Foam::label Foam::blockMesh::numZonedBlocks() const
 
     forAll(*this, blockI)
     {
-        if (operator[](blockI).blockDef().zoneName().size() > 0)
+        if (operator[](blockI).blockDef().zoneName().size())
         {
             num++;
         }

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

@@ -278,7 +278,7 @@ int main(int argc, char *argv[])
             const labelListList& blockCells = b.cells();
             const word& zoneName = b.blockDef().zoneName();
 
-            if (zoneName.size() > 0)
+            if (zoneName.size())
             {
                 HashTable<label>::const_iterator iter = zoneMap.find(zoneName);
 

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

@@ -1,6 +1,6 @@
         Info<< "Creating merge patch pairs" << nl << endl;
 
-        if (mergePatchPairs.size() > 0)
+        if (mergePatchPairs.size())
         {
             // Create and add point and face zones and mesh modifiers
             List<pointZone*> pz(mergePatchPairs.size());

applications/utilities/mesh/manipulation/checkMesh/checkTopology.C

@@ -177,7 +177,7 @@ Foam::label Foam::checkTopology
 
             primitivePatch::surfaceTopo pTyp = pp.surfaceType();
 
-            if (pp.size() == 0)
+            if (pp.empty())
             {
                 Pout<< setw(34) << "ok (empty)";
             }
@@ -232,7 +232,7 @@ Foam::label Foam::checkTopology
             Pout<< endl;
         }
 
-        if (points.size() > 0)
+        if (points.size())
         {
             Pout<< "  <<Writing " << points.size()
                 << " conflicting points to set "

applications/utilities/mesh/manipulation/createPatch/createPatch.C

@@ -172,7 +172,7 @@ void filterPatches(polyMesh& mesh)
 
         if (isA<processorPolyPatch>(pp))
         {
-            if (pp.size() > 0)
+            if (pp.size())
             {
                 allPatches.append
                 (
@@ -586,7 +586,7 @@ int main(int argc, char *argv[])
     // 1. Add all new patches
     // ~~~~~~~~~~~~~~~~~~~~~~
 
-    if (patchSources.size() > 0)
+    if (patchSources.size())
     {
         // Old and new patches.
         DynamicList<polyPatch*> allPatches(patches.size()+patchSources.size());

applications/utilities/mesh/manipulation/mergeMeshes/mergePolyMesh.C

@@ -34,10 +34,7 @@ License
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
-namespace Foam
-{
-    defineTypeNameAndDebug(mergePolyMesh, 1);
-}
+defineTypeNameAndDebug(Foam::mergePolyMesh, 1);
 
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
@@ -142,7 +139,7 @@ Foam::mergePolyMesh::mergePolyMesh(const IOobject& io)
 
     // Point zones
     wordList curPointZoneNames = pointZones().names();
-    if (curPointZoneNames.size() > 0)
+    if (curPointZoneNames.size())
     {
         pointZoneNames_.setCapacity(2*curPointZoneNames.size());
     }
@@ -155,7 +152,7 @@ Foam::mergePolyMesh::mergePolyMesh(const IOobject& io)
     // Face zones
     wordList curFaceZoneNames = faceZones().names();
 
-    if (curFaceZoneNames.size() > 0)
+    if (curFaceZoneNames.size())
     {
         faceZoneNames_.setCapacity(2*curFaceZoneNames.size());
     }
@@ -167,7 +164,7 @@ Foam::mergePolyMesh::mergePolyMesh(const IOobject& io)
     // Cell zones
     wordList curCellZoneNames = cellZones().names();
 
-    if (curCellZoneNames.size() > 0)
+    if (curCellZoneNames.size())
     {
         cellZoneNames_.setCapacity(2*curCellZoneNames.size());
     }
@@ -333,11 +330,11 @@ void Foam::mergePolyMesh::addMesh(const polyMesh& m)
         newOwn = own[faceI];
         if (newOwn > -1) newOwn = renumberCells[newOwn];
 
-        if (newPatch > -1) 
+        if (newPatch > -1)
         {
             newNei = -1;
-        } 
-        else 
+        }
+        else
         {
             newNei = nei[faceI];
             newNei = renumberCells[newNei];
@@ -373,7 +370,7 @@ void Foam::mergePolyMesh::addMesh(const polyMesh& m)
                 )
             );
     }
-        
+
 }
 
 

applications/utilities/mesh/manipulation/objToVTK/objToVTK.C

@@ -48,7 +48,7 @@ string getLine(std::ifstream& is)
     {
         std::getline(is, line);
     }
-    while((line.size() > 0) && (line[0] == '#'));
+    while (line.size() && line[0] == '#');
 
     return line;
 }

applications/utilities/mesh/manipulation/refineMesh/refineMesh.C

@@ -485,7 +485,7 @@ int main(int argc, char *argv[])
     {
         const labelList& added = oldToNew[oldCellI];
 
-        if (added.size() > 0)
+        if (added.size())
         {
             forAll(added, i)
             {

applications/utilities/mesh/manipulation/setSet/setSet.C

@@ -89,7 +89,7 @@ void backup
     const word& toName
 )
 {
-    if (fromSet.size() > 0)
+    if (fromSet.size())
     {
         Pout<< "    Backing up " << fromName << " into " << toName << endl;
 
@@ -284,7 +284,7 @@ void printAllSets(const polyMesh& mesh, Ostream& os)
         polyMesh::meshSubDir/"sets"
     );
     IOobjectList cellSets(objects.lookupClass(cellSet::typeName));
-    if (cellSets.size() > 0)
+    if (cellSets.size())
     {
         os  << "cellSets:" << endl;
         forAllConstIter(IOobjectList, cellSets, iter)
@@ -294,7 +294,7 @@ void printAllSets(const polyMesh& mesh, Ostream& os)
         }
     }
     IOobjectList faceSets(objects.lookupClass(faceSet::typeName));
-    if (faceSets.size() > 0)
+    if (faceSets.size())
     {
         os  << "faceSets:" << endl;
         forAllConstIter(IOobjectList, faceSets, iter)
@@ -304,7 +304,7 @@ void printAllSets(const polyMesh& mesh, Ostream& os)
         }
     }
     IOobjectList pointSets(objects.lookupClass(pointSet::typeName));
-    if (pointSets.size() > 0)
+    if (pointSets.size())
     {
         os  << "pointSets:" << endl;
         forAllConstIter(IOobjectList, pointSets, iter)
@@ -347,7 +347,7 @@ bool doCommand
     bool ok = true;
 
     // Set to work on
-    autoPtr<topoSet> currentSetPtr(NULL);
+    autoPtr<topoSet> currentSetPtr;
 
     word sourceType;
 
@@ -383,7 +383,7 @@ bool doCommand
             currentSet.resize(max(currentSet.size(), typSize));
         }
 
-        if (!currentSetPtr.valid())
+        if (currentSetPtr.empty())
         {
             Pout<< "    Cannot construct/load set "
                 << topoSet::localPath(mesh, setName) << endl;
@@ -522,7 +522,7 @@ bool doCommand
 
         Pout<< fIOErr.message().c_str() << endl;
 
-        if (sourceType.size() != 0)
+        if (sourceType.size())
         {
             Pout<< topoSetSource::usage(sourceType).c_str();
         }
@@ -533,7 +533,7 @@ bool doCommand
 
         Pout<< fErr.message().c_str() << endl;
 
-        if (sourceType.size() != 0)
+        if (sourceType.size())
         {
             Pout<< topoSetSource::usage(sourceType).c_str();
         }
@@ -571,7 +571,7 @@ commandStatus parseType
     IStringStream& is
 )
 {
-    if (setType.size() == 0)
+    if (setType.empty())
     {
         Pout<< "Type 'help' for usage information" << endl;
 
@@ -689,7 +689,7 @@ commandStatus parseAction(const word& actionName)
 {
     commandStatus stat = INVALID;
 
-    if (actionName.size() != 0)
+    if (actionName.size())
     {
         try
         {
@@ -792,7 +792,7 @@ int main(int argc, char *argv[])
 
             std::getline(*fileStreamPtr, rawLine);
 
-            if (rawLine.size() > 0)
+            if (rawLine.size())
             {
                 Pout<< "Doing:" << rawLine << endl;
             }
@@ -821,7 +821,7 @@ int main(int argc, char *argv[])
 #           endif
         }
 
-        if (rawLine.size() == 0 || rawLine[0] == '#')
+        if (rawLine.empty() || rawLine[0] == '#')
         {
             continue;
         }

applications/utilities/mesh/manipulation/splitMesh/splitMesh.C

@@ -100,10 +100,10 @@ void checkPatch(const polyBoundaryMesh& bMesh, const word& name)
             << exit(FatalError);
     }
 
-    if (bMesh[patchI].size() != 0)
+    if (bMesh[patchI].size())
     {
         FatalErrorIn("checkPatch(const polyBoundaryMesh&, const word&)")
-            << "Patch " << name << " is present but not of zero size"
+            << "Patch " << name << " is present but non-zero size"
             << exit(FatalError);
     }
 }

applications/utilities/mesh/manipulation/splitMeshRegions/splitMeshRegions.C

@@ -878,7 +878,7 @@ void createAndWriteRegion
     {
         const polyPatch& pp = newPatches[patchI];
 
-        if (isA<processorPolyPatch>(pp) && pp.size() > 0)
+        if (isA<processorPolyPatch>(pp) && pp.size())
         {
             oldToNew[patchI] = newI++;
         }
@@ -1049,7 +1049,7 @@ label findCorrespondingZone
 
     labelList regionCells = findIndices(cellRegion, regionI);
 
-    if (regionCells.size() == 0)
+    if (regionCells.empty())
     {
         // My local portion is empty. Maps to any empty cellZone. Mark with
         // special value which can get overwritten by other processors.
@@ -1200,7 +1200,7 @@ int main(int argc, char *argv[])
     boolList blockedFace;
 
     // Read from faceSet
-    if (blockedFacesName.size() > 0)
+    if (blockedFacesName.size())
     {
         faceSet blockedFaceSet(mesh, blockedFacesName);
         Info<< "Read " << returnReduce(blockedFaceSet.size(), sumOp<label>())

applications/utilities/mesh/manipulation/stitchMesh/stitchMesh.C

@@ -82,7 +82,7 @@ void checkPatch(const polyBoundaryMesh& bMesh, const word& name)
             << exit(FatalError);
     }
 
-    if (bMesh[patchI].size() == 0)
+    if (bMesh[patchI].empty())
     {
         FatalErrorIn("checkPatch(const polyBoundaryMesh&, const word&)")
             << "Patch " << name << " is present but zero size"

applications/utilities/mesh/manipulation/transformPoints/transformPoints.C

@@ -152,7 +152,7 @@ int main(int argc, char *argv[])
     );
 
 
-    if (args.options().size() == 0)
+    if (args.options().empty())
     {
         FatalErrorIn(args.executable())
             << "No options supplied, please use one or more of "

applications/utilities/parallelProcessing/decomposePar/distributeCells.C

@@ -104,7 +104,7 @@ void domainDecomposition::distributeCells()
         }
     }
 
-    if (sameProcFaces.size() > 0)
+    if (sameProcFaces.size())
     {
         Info<< "Selected " << sameProcFaces.size()
             << " faces whose owner and neighbour cell should be kept on the"
@@ -123,7 +123,7 @@ void domainDecomposition::distributeCells()
         *this
     );
 
-    if (sameProcFaces.size() == 0)
+    if (sameProcFaces.empty())
     {
         cellToProc_ = decomposePtr().decompose(cellCentres());
     }

applications/utilities/parallelProcessing/reconstructPar/reconstructPar.C

@@ -100,7 +100,7 @@ int main(int argc, char *argv[])
         args
     );
 
-    if (!timeDirs.size())
+    if (timeDirs.empty())
     {
         FatalErrorIn(args.executable())
             << "No times selected"
@@ -319,7 +319,7 @@ int main(int argc, char *argv[])
         }
 
 
-        if (cloudObjects.size() > 0)
+        if (cloudObjects.size())
         {
             // Pass2: reconstruct the cloud
             forAllConstIter(HashTable<IOobjectList>, cloudObjects, iter)

applications/utilities/postProcessing/dataConversion/foamToEnsight/ensightField.C

@@ -558,7 +558,7 @@ void ensightFieldAscii
 
     GeometricField<Type, fvPatchField, volMesh> vf(fieldObject, mesh);
 
-    if (!patchNames.size())
+    if (patchNames.empty())
     {
         if (Pstream::master())
         {
@@ -633,7 +633,7 @@ void ensightFieldAscii
         const word& patchName = iter.key();
         const labelList& patchProcessors = iter();
 
-        if (!patchNames.size() || patchNames.found(patchName))
+        if (patchNames.empty() || patchNames.found(patchName))
         {
             if (patchIndices.found(patchName))
             {
@@ -734,7 +734,7 @@ void ensightFieldBinary
 
     GeometricField<Type, fvPatchField, volMesh> vf(fieldObject, mesh);
 
-    if (!patchNames.size())
+    if (patchNames.empty())
     {
         if (Pstream::master())
         {
@@ -805,7 +805,7 @@ void ensightFieldBinary
         const word& patchName = iter.key();
         const labelList& patchProcessors = iter();
 
-        if (!patchNames.size() || patchNames.found(patchName))
+        if (patchNames.empty() || patchNames.found(patchName))
         {
             if (patchIndices.found(patchName))
             {

applications/utilities/postProcessing/dataConversion/foamToEnsight/ensightMesh.C

@@ -129,7 +129,7 @@ Foam::ensightMesh::ensightMesh
     {
         wordList patchNameList(IStringStream(args.options()["patches"])());
 
-        if (!patchNameList.size())
+        if (patchNameList.empty())
         {
             patchNameList = allPatchNames_.toc();
         }
@@ -163,7 +163,7 @@ Foam::ensightMesh::ensightMesh
     label nHexes = 0;
     label nPolys = 0;
 
-    if (!patchNames_.size())
+    if (patchNames_.empty())
     {
         forAll(cellShapes, celli)
         {
@@ -267,7 +267,7 @@ Foam::ensightMesh::ensightMesh
         const word& patchName = iter.key();
         nFacePrimitives nfp;
 
-        if (!patchNames_.size() || patchNames_.found(patchName))
+        if (patchNames_.empty() || patchNames_.found(patchName))
         {
             if (patchIndices_.found(patchName))
             {
@@ -403,7 +403,7 @@ void Foam::ensightMesh::writePrimsBinary
 
     numElem = cellShapes.size();
 
-    if (cellShapes.size() > 0)
+    if (cellShapes.size())
     {
         // All the cellShapes have the same number of elements!
         int numIntElem = cellShapes.size()*cellShapes[0].size();
@@ -917,7 +917,7 @@ void Foam::ensightMesh::writeAscii
 
     labelList pointOffsets(Pstream::nProcs(), 0);
 
-    if (!patchNames_.size())
+    if (patchNames_.empty())
     {
         label nPoints = points.size();
         Pstream::gather(nPoints, sumOp<label>());
@@ -1044,7 +1044,7 @@ void Foam::ensightMesh::writeAscii
     {
         const labelList& patchProcessors = iter();
 
-        if (!patchNames_.size() || patchNames_.found(iter.key()))
+        if (patchNames_.empty() || patchNames_.found(iter.key()))
         {
             const word& patchName = iter.key();
             const nFacePrimitives& nfp = nPatchPrims_.find(patchName)();
@@ -1244,7 +1244,7 @@ void Foam::ensightMesh::writeBinary
 
     labelList pointOffsets(Pstream::nProcs(), 0);
 
-    if (!patchNames_.size())
+    if (patchNames_.empty())
     {
         label nPoints = points.size();
         Pstream::gather(nPoints, sumOp<label>());
@@ -1373,7 +1373,7 @@ void Foam::ensightMesh::writeBinary
         iCount ++;
         const labelList& patchProcessors = iter();
 
-        if (!patchNames_.size() || patchNames_.found(iter.key()))
+        if (patchNames_.empty() || patchNames_.found(iter.key()))
         {
             const word& patchName = iter.key();
             const nFacePrimitives& nfp = nPatchPrims_.find(patchName)();

applications/utilities/postProcessing/dataConversion/foamToEnsight/ensightWriteBinary.C

@@ -57,7 +57,7 @@ void writeEnsDataBinary
     std::ofstream& ensightFile
 )
 {
-    if (sf.size() > 0)
+    if (sf.size())
     {
         List<float> temp(sf.size());
 

applications/utilities/postProcessing/dataConversion/foamToEnsightParts/validateFields.H

@@ -77,9 +77,9 @@ forAllIter(HashTable<HashTable<word> >, cloudFields, cloudIter)
         }
     }
 
-    if (!cloudIter().size())
+    if (cloudIter().empty())
     {
-        Info<< "removing cloud " << cloudName<< endl;
+        Info<< "removing cloud " << cloudName << endl;
         cloudFields.erase(cloudIter);
     }
 }

applications/utilities/postProcessing/dataConversion/foamToFieldview9/foamToFieldview9.C

@@ -227,7 +227,7 @@ int main(int argc, char *argv[])
 #   include "getFieldNames.H"
 
     bool hasLagrangian = false;
-    if ((sprayScalarNames.size() > 0) || (sprayVectorNames.size() > 0))
+    if (sprayScalarNames.size() || sprayVectorNames.size())
     {
         hasLagrangian = true;
     }

applications/utilities/postProcessing/dataConversion/foamToGMV/gmvOutput.H

@@ -80,7 +80,7 @@ for(label i=0; i < nTypes; i++)
             wordList lagrangianScalarNames = objects.names("scalarField");
             wordList lagrangianVectorNames = objects.names("vectorField");
 
-            if (particles.size() > 0)
+            if (particles.size())
             {
 #               include "gmvOutputLagrangian.H"
             }

applications/utilities/postProcessing/dataConversion/foamToGMV/gmvOutputLagrangian.H

@@ -49,16 +49,11 @@ forAll(lagrangianScalarNames, i)
         )
     );
 
-    if (s.size() != 0)
+    if (s.size())
     {
         gmvFile << name  << nl;
 
-        for
-        (
-            label n = 0;
-            n < s.size();
-            n++
-        )
+        for (label n = 0; n < s.size(); n++)
         {
             gmvFile << s[n] << token::SPACE;
         }
@@ -85,16 +80,11 @@ forAll(lagrangianVectorNames, i)
         )
     );
 
-    if (v.size() != 0)
+    if (v.size())
     {
         gmvFile << name + "x" << nl;
 
-        for
-        (
-            label n = 0;
-            n < v.size();
-            n++
-        )
+        for (label n = 0; n < v.size(); n++)
         {
             gmvFile << v[n].x() << token::SPACE;
         }
@@ -102,12 +92,7 @@ forAll(lagrangianVectorNames, i)
 
         gmvFile << name + "y" << nl;
 
-        for
-        (
-            label n = 0;
-            n < v.size();
-            n++
-        )
+        for (label n = 0; n < v.size(); n++)
         {
             gmvFile << v[n].y() << token::SPACE;
         }
@@ -115,19 +100,13 @@ forAll(lagrangianVectorNames, i)
 
         gmvFile << name + "z" << nl;
 
-        for
-        (
-            label n = 0;
-            n < v.size();
-            n++
-        )
+        for (label n = 0; n < v.size(); n++)
         {
             gmvFile << v[n].z() << token::SPACE;
         }
         gmvFile << nl;
     }
 
-
 }
 
 

applications/utilities/postProcessing/dataConversion/foamToGMV/gmvOutputSpray.H

@@ -47,16 +47,11 @@ forAll(lagrangianScalarNames, i)
         )
     );
 
-    if (s.size() != 0)
+    if (s.size())
     {
         gmvFile << name  << nl;
 
-        for
-        (
-            label n = 0;
-            n < s.size();
-            n++
-        )
+        for (label n = 0; n < s.size(); n++)
         {
             gmvFile << s[n] << token::SPACE;
         }

applications/utilities/postProcessing/dataConversion/foamToVTK/foamToVTK.C

@@ -339,7 +339,7 @@ int main(int argc, char *argv[])
         (
             args.options().found("time")
          || args.options().found("latestTime")
-         || cellSetName.size() > 0
+         || cellSetName.size()
          || regionName != polyMesh::defaultRegion
         )
         {

applications/utilities/postProcessing/dataConversion/foamToVTK/readFields.C

@@ -58,7 +58,7 @@ void readFields
         ++iter
     )
     {
-        if (!selectedFields.size() || selectedFields.found(iter()->name()))
+        if (selectedFields.empty() || selectedFields.found(iter()->name()))
         {
             fields.set
             (

applications/utilities/postProcessing/dataConversion/foamToVTK/vtkMesh.C

@@ -47,7 +47,7 @@ Foam::vtkMesh::vtkMesh
     subsetter_(baseMesh),
     setName_(setName)
 {
-    if (setName.size() > 0)
+    if (setName.size())
     {
         // Read cellSet using whole mesh
         cellSet currentSet(baseMesh_, setName_);
@@ -71,7 +71,7 @@ Foam::polyMesh::readUpdateState Foam::vtkMesh::readUpdate()
 
         topoPtr_.clear();
 
-        if (setName_.size() > 0)
+        if (setName_.size())
         {
             Info<< "Subsetting mesh based on cellSet " << setName_ << endl;
 

applications/utilities/postProcessing/dataConversion/foamToVTK/vtkMesh.H

@@ -105,13 +105,13 @@ public:
             //- Check if running subMesh
             bool useSubMesh() const
             {
-                return setName_.size() > 0;
+                return setName_.size();
             }
 
             //- topology
             const vtkTopo& topo() const
             {
-                if (!topoPtr_.valid())
+                if (topoPtr_.empty())
                 {
                     topoPtr_.reset(new vtkTopo(mesh()));
                 }

applications/utilities/postProcessing/graphics/PV3FoamReader/vtkPV3Foam/vtkPV3Foam.H

@@ -154,6 +154,11 @@ class vtkPV3Foam
                 return size_;
             }
 
+            bool empty() const
+            {
+                return (size_ == 0);
+            }
+
             void reset()
             {
                 start_ = -1;

applications/utilities/postProcessing/graphics/ensightFoamReader/USERD_set_filenames.H

@@ -147,14 +147,14 @@ int USERD_set_filenames
     
     bool lagrangianNamesFound = false;
     label n = 0;
-    while ((!lagrangianNamesFound) && (n<Num_time_steps))
+    while (!lagrangianNamesFound && n < Num_time_steps)
     {
         runTime.setTime(TimeList[n+1], n+1);
 
         Cloud<passiveParticle> lagrangian(*meshPtr);
 
         n++;
-        if (lagrangian.size()>0)
+        if (lagrangian.size())
         {
             lagrangianNamesFound = true;
         }

applications/utilities/postProcessing/graphics/ensightFoamReader/getLagrangianScalar.H

@@ -4,7 +4,6 @@ nVar -= Num_variables - nSprayVariables;
 
 if (nVar >= 0)
 {
-    
     word name = lagrangianScalarNames[nVar];
 
     IOField<scalar> s
@@ -20,15 +19,9 @@ if (nVar >= 0)
         )
     );
 
-    if (s.size() != 0)
+    if (s.size())
     {
-
-        for
-        (
-            label n = 0;
-            n < s.size();
-            n++
-        )
+        for (label n = 0; n < s.size(); n++)
         {
             var_array[n+1] = s[n];
         }
@@ -36,7 +29,7 @@ if (nVar >= 0)
 }
 else
 {
-    //Info << "getLagrangianScalar: nVar = " << nVar << endl;
+    // Info << "getLagrangianScalar: nVar = " << nVar << endl;
     return Z_UNDEF;
 }
 

applications/utilities/postProcessing/graphics/ensightFoamReader/getLagrangianVector.H

@@ -21,16 +21,10 @@ if (nVar >= 0)
         )
     );
 
-    if (v.size() != 0)
+    if (v.size())
     {
-        for
-        (
-            label n = 0;
-            n < v.size();
-            n++
-        )
+        for (label n = 0; n < v.size(); n++)
         {
-
             if (component == 0)
             {
                 var_array[n+1] = v[n].x();

applications/utilities/postProcessing/graphics/fieldview9Reader/fieldview9Reader.C

@@ -235,7 +235,7 @@ static void createFieldNames
     HashSet<word> surfScalarHash;
     HashSet<word> surfVectorHash;
 
-    if (setName.size() == 0)
+    if (setName.empty())
     {
         forAll(Times, timeI)
         {
@@ -536,13 +536,12 @@ void user_query_file_function
     fileName caseName(rootAndCase.name());
 
     // handle trailing '/'
-    if (caseName.size() == 0)
+    if (caseName.empty())
     {
         caseName = rootDir.name();
-        rootDir = rootDir.path();
+        rootDir  = rootDir.path();
     }
 
-
     Info<< "rootDir  : " << rootDir << endl
         << "caseName : " << caseName << endl
         << "setName  : " << setName << endl;

applications/utilities/postProcessing/graphics/fieldview9Reader/readerDatabase.C

@@ -150,7 +150,7 @@ const Foam::fvMesh& Foam::readerDatabase::mesh() const
             << "No mesh set" << abort(FatalError);
     }
 
-    if (setName_.size() == 0)
+    if (setName_.empty())
     {
         return *meshPtr_;
     }
@@ -265,7 +265,7 @@ void Foam::readerDatabase::loadMesh()
         IOobject::AUTO_WRITE
     );
 
-    if (setName_.size() != 0)
+    if (setName_.size())
     {
         Info<< "Subsetting mesh based on cellSet " << setName_ << endl;
 
@@ -294,9 +294,9 @@ Foam::polyMesh::readUpdateState Foam::readerDatabase::setTime
         // Update loaded mesh
         meshChange = meshPtr_->readUpdate();
 
-        if ((setName_.size() != 0) && (meshChange != polyMesh::UNCHANGED))
+        if (setName_.size() && meshChange != polyMesh::UNCHANGED)
         {
-            Info<< "Subsetting mesh based on " << setName_ << endl;        
+            Info<< "Subsetting mesh based on " << setName_ << endl;
 
             fvMeshSubset& mesh = *meshPtr_;
 

applications/utilities/preProcessing/mapFields/mapLagrangian.C

@@ -206,7 +206,7 @@ void mapLagrangian(const meshToMesh& meshToMeshInterp)
             // Do closer inspection for unmapped particles
             // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
-            if (unmappedSource.size() > 0)
+            if (unmappedSource.size())
             {
                 meshSearch targetSearcher(meshTarget, false);
 
@@ -237,7 +237,7 @@ void mapLagrangian(const meshToMesh& meshToMeshInterp)
             Info<< "    after additional mesh searching found "
                 << targetParcels.size() << " parcels in target mesh." << endl;
 
-            if (addParticles.size() > 0)
+            if (addParticles.size())
             {
                 IOPosition<passiveParticle>(targetParcels).write();
 

applications/utilities/surface/surfaceCheck/surfaceCheck.C

@@ -242,9 +242,7 @@ int main(int argc, char *argv[])
             }
         }
 
-        illegalFaces.shrink();
-
-        if (illegalFaces.size() > 0)
+        if (illegalFaces.size())
         {
             Pout<< "Surface has " << illegalFaces.size()
                 << " illegal triangles." << endl;
@@ -628,7 +626,7 @@ int main(int argc, char *argv[])
         triSurfaceSearch querySurf(surf);
         surfaceIntersection inter(querySurf);
 
-        if ((inter.cutEdges().size() == 0) && (inter.cutPoints().size() == 0))
+        if (inter.cutEdges().empty() && inter.cutPoints().empty())
         {
             Pout<< "Surface is not self-intersecting" << endl;
         }

applications/utilities/surface/surfaceClean/collapseBase.C

@@ -860,7 +860,7 @@ label collapseBase(triSurface& surf, const scalar minLen)
                     splitWeights
                 );
 
-                if (splitVerts.size() > 0)
+                if (splitVerts.size())
                 {
                     // Split edge using splitVerts. All non-collapsed triangles 
                     // using edge will get split.

applications/utilities/surface/surfaceFeatureConvert/surfaceFeatureConvert.C

@@ -49,9 +49,9 @@ void readNASEdges
     edgeList& allEdges
 )
 {
-   IFstream OBJfile(inFileName);
+    IFstream is(inFileName);
 
-    if (!OBJfile.good())
+    if (!is.good())
     {
         FatalErrorIn("readNASEdges")
             << "Cannot read file " << inFileName
@@ -68,14 +68,14 @@ void readNASEdges
     DynamicList<label> edgeIndices;
 
 
-    while (OBJfile.good())
+    while (is.good())
     {
         string line;
-        OBJfile.getLine(line);
+        is.getLine(line);
 
-        if (line.size() > 0 && line[0] == '$')
+        if (line.empty() || line[0] == '$')
         {
-            // Skip comment
+            // Skip empty and comment
             continue;
         }
 
@@ -87,9 +87,9 @@ void readNASEdges
             while (true)
             {
                 string buf;
-                OBJfile.getLine(buf);
+                is.getLine(buf);
 
-                if (buf.size() > 72 && buf[72]=='+')
+                if (buf.size() > 72 && buf[72] == '+')
                 {
                     line += buf.substr(8, 64);
                 }

applications/utilities/surface/surfaceSplitByPatch/surfaceSplitByPatch.C

@@ -64,7 +64,7 @@ int main(int argc, char *argv[])
 
         word patchName = pp.name();
 
-        if (patchName.size() == 0)
+        if (patchName.empty())
         {
             patchName = "patch" + Foam::name(patchI);
         }

applications/utilities/surface/surfaceSubset/surfaceSubset.C

@@ -86,7 +86,7 @@ int main(int argc, char *argv[])
         meshSubsetDict.lookup("zone")
     );
 
-    if ((markedZone.size() != 0) && (markedZone.size() != 2))
+    if (markedZone.size() && markedZone.size() != 2)
     {
         FatalErrorIn(args.executable())
             << "zone specification should be two points, min and max of "
@@ -115,7 +115,7 @@ int main(int argc, char *argv[])
     // pick up faces connected to "localPoints"
     //
 
-    if (markedPoints.size() > 0)
+    if (markedPoints.size())
     {
         Info << "Found " << markedPoints.size() << " marked point(s)." << endl;
 
@@ -153,7 +153,7 @@ int main(int argc, char *argv[])
     // pick up faces connected to "edges"
     //
 
-    if (markedEdges.size() > 0)
+    if (markedEdges.size())
     {
         Info << "Found " << markedEdges.size() << " marked edge(s)." << endl;
 
@@ -293,7 +293,7 @@ int main(int argc, char *argv[])
     // Number of additional faces picked up because of addFaceNeighbours
     label nFaceNeighbours = 0;
 
-    if (markedFaces.size() > 0)
+    if (markedFaces.size())
     {
         Info << "Found " << markedFaces.size() << " marked face(s)." << endl;
 

applications/utilities/surface/surfaceTransformPoints/surfaceTransformPoints.C

@@ -63,7 +63,7 @@ int main(int argc, char *argv[])
     Info<< "Writing surf to " << outFileName << " ..." << endl;
 
 
-    if (args.options().size() == 0)
+    if (args.options().empty())
     {
         FatalErrorIn(args.executable())
             << "No options supplied, please use one or more of "

src/OSspecific/Unix/Unix.C

@@ -284,7 +284,7 @@ Foam::fileName Foam::findEtcFile(const fileName& name, bool mandatory)
 bool Foam::mkDir(const fileName& pathName, mode_t mode)
 {
     // empty names are meaningless
-    if (!pathName.size())
+    if (pathName.empty())
     {
         return false;
     }
@@ -567,10 +567,10 @@ Foam::fileNameList Foam::readDir
         {
             fileName fName(list->d_name);
 
-            // ignore files begining with ., i.e. ., .. and .??*
-            if (fName.size() > 0 && fName[size_t(0)] != '.')
+            // ignore files begining with ., i.e. '.', '..' and '.*'
+            if (fName.size() && fName[0] != '.')
             {
-                word fileNameExt = fName.ext();
+                word fExt = fName.ext();
 
                 if
                 (
@@ -578,11 +578,11 @@ Foam::fileNameList Foam::readDir
                  ||
                     (
                         type == fileName::FILE
-                        && fName[fName.size()-1] != '~'
-                        && fileNameExt != "bak"
-                        && fileNameExt != "BAK"
-                        && fileNameExt != "old"
-                        && fileNameExt != "save"
+                     && fName[fName.size()-1] != '~'
+                     && fExt != "bak"
+                     && fExt != "BAK"
+                     && fExt != "old"
+                     && fExt != "save"
                     )
                 )
                 {
@@ -593,7 +593,7 @@ Foam::fileNameList Foam::readDir
                             dirEntries.setSize(dirEntries.size() + maxNnames);
                         }
 
-                        if (filtergz && fileNameExt == "gz")
+                        if (filtergz && fExt == "gz")
                         {
                             dirEntries[nEntries++] = fName.lessExt();
                         }
@@ -616,17 +616,17 @@ Foam::fileNameList Foam::readDir
 }
 
 
-// Copy, recursively if necessary, the source top the destination
+// Copy, recursively if necessary, the source to the destination
 bool Foam::cp(const fileName& src, const fileName& dest)
 {
-    fileName destFile(dest);
-
     // Make sure source exists.
     if (!exists(src))
     {
         return false;
     }
 
+    fileName destFile(dest);
+
     // Check type of source file.
     if (src.type() == fileName::FILE)
     {
@@ -676,7 +676,7 @@ bool Foam::cp(const fileName& src, const fileName& dest)
             destFile = destFile/src.component(src.components().size() -1);
         }
 
-        // Make sure the destination directory extists.
+        // Make sure the destination directory exists.
         if (!dir(destFile) && !mkDir(destFile))
         {
             return false;

src/OSspecific/Unix/printStack.C

@@ -149,7 +149,7 @@ void getSymbolForRaw
     const word& address
 )
 {
-    if (filename.size() > 0 && filename[0] == '/')
+    if (filename.size() && filename[0] == '/')
     {
         string fcnt = pOpen
         (
@@ -189,7 +189,7 @@ void error::printStack(Ostream& os)
             string::size_type space = line.rfind(' ') + 1;
             fileName libPath = line.substr(space, line.size()-space);
 
-            if (libPath.size() > 0 && libPath[0] == '/')
+            if (libPath.size() && libPath[0] == '/')
             {
                 string offsetString(line.substr(0, line.find('-')));
                 IStringStream offsetStr(offsetString);

src/OpenFOAM/containers/HashTables/StaticHashTable/StaticHashTable.C

@@ -476,8 +476,8 @@ void Foam::StaticHashTable<T, Key, Hash>::operator=
     }
 
 
-    // could be zero-sized from a previous transfer()
-    if (keys_.size() == 0)
+    // keys could be empty from a previous transfer()
+    if (keys_.empty())
     {
         keys_.setSize(rhs.keys_.size());
         objects_.setSize(keys_.size());

src/OpenFOAM/containers/HashTables/StaticHashTable/StaticHashTableI.H

@@ -328,7 +328,7 @@ Foam::StaticHashTable<T, Key, Hash>::begin()
     // Find first non-empty entry
     forAll(keys_, hashIdx)
     {
-        if (keys_[hashIdx].size() > 0)
+        if (keys_[hashIdx].size())
         {
             return iterator(*this, hashIdx, 0);
         }
@@ -360,7 +360,7 @@ Foam::StaticHashTable<T, Key, Hash>::begin() const
     // Find first non-empty entry
     forAll(keys_, hashIdx)
     {
-        if (keys_[hashIdx].size() > 0)
+        if (keys_[hashIdx].size())
         {
             return const_iterator(*this, hashIdx, 0);
         }

src/OpenFOAM/db/IOobjectList/IOobjectList.C

@@ -52,7 +52,7 @@ Foam::IOobjectList::IOobjectList
     {
         newInstance = db.time().findInstancePath(instant(instance));
 
-        if (!newInstance.size())
+        if (newInstance.empty())
         {
             return;
         }
@@ -181,7 +181,7 @@ Foam::wordList Foam::IOobjectList::names() const
 {
     wordList objectNames(size());
 
-    label count=0;
+    label count = 0;
     for
     (
         HashPtrTable<IOobject>::const_iterator iter = begin();
@@ -200,7 +200,7 @@ Foam::wordList Foam::IOobjectList::names(const word& ClassName) const
 {
     wordList objectNames(size());
 
-    label count=0;
+    label count = 0;
     for
     (
         HashPtrTable<IOobject>::const_iterator iter = begin();

src/OpenFOAM/db/IOstreams/Fstreams/IFstream.C

@@ -42,7 +42,7 @@ Foam::IFstreamAllocator::IFstreamAllocator(const fileName& pathname)
     ifPtr_(NULL),
     compression_(IOstream::UNCOMPRESSED)
 {
-    if (!pathname.size())
+    if (pathname.empty())
     {
         if (IFstream::debug)
         {

src/OpenFOAM/db/IOstreams/Fstreams/OFstream.C

@@ -46,7 +46,7 @@ Foam::OFstreamAllocator::OFstreamAllocator
 :
     ofPtr_(NULL)
 {
-    if (!pathname.size())
+    if (pathname.empty())
     {
         if (OFstream::debug)
         {

src/OpenFOAM/db/IOstreams/Pstreams/OPstream.C

@@ -136,18 +136,18 @@ Foam::Ostream& Foam::OPstream::write(const char* str)
 {
     word nonWhiteChars(string::validate<word>(str));
 
-    if (nonWhiteChars.size() == 0)
-    {
-        return *this;
-    }
-    else if (nonWhiteChars.size() == 1)
+    if (nonWhiteChars.size() == 1)
     {
         return write(nonWhiteChars.c_str()[1]);
     }
-    else
+    else if (nonWhiteChars.size())
     {
         return write(nonWhiteChars);
     }
+    else
+    {
+        return *this;
+    }
 }
 
 

src/OpenFOAM/db/Time/timeSelector.C

@@ -236,7 +236,7 @@ Foam::List<Foam::instant> Foam::timeSelector::select0
 {
     instantList timeDirs = timeSelector::select(runTime.times(), args);
 
-    if (!timeDirs.size())
+    if (timeDirs.empty())
     {
         FatalErrorIn(args.executable())
             << "No times selected"

src/OpenFOAM/db/dictionary/dictionary.C

@@ -46,7 +46,7 @@ bool Foam::dictionary::findInPatterns
     DLList<autoPtr<regExp> >::const_iterator& reLink
 ) const
 {
-    if (patternEntries_.size() > 0)
+    if (patternEntries_.size())
     {
         while (wcLink != patternEntries_.end())
         {
@@ -76,7 +76,7 @@ bool Foam::dictionary::findInPatterns
     DLList<autoPtr<regExp> >::iterator& reLink
 )
 {
-    if (patternEntries_.size() > 0)
+    if (patternEntries_.size())
     {
         while (wcLink != patternEntries_.end())
         {
@@ -240,7 +240,7 @@ bool Foam::dictionary::found(const word& keyword, bool recursive) const
     }
     else
     {
-        if (patternEntries_.size() > 0)
+        if (patternEntries_.size())
         {
             DLList<entry*>::const_iterator wcLink = patternEntries_.begin();
             DLList<autoPtr<regExp> >::const_iterator reLink =
@@ -276,7 +276,7 @@ const Foam::entry* Foam::dictionary::lookupEntryPtr
 
     if (iter == hashedEntries_.end())
     {
-        if (patternMatch && patternEntries_.size() > 0)
+        if (patternMatch && patternEntries_.size())
         {
             DLList<entry*>::const_iterator wcLink =
                 patternEntries_.begin();
@@ -315,7 +315,7 @@ Foam::entry* Foam::dictionary::lookupEntryPtr
 
     if (iter == hashedEntries_.end())
     {
-        if (patternMatch && patternEntries_.size() > 0)
+        if (patternMatch && patternEntries_.size())
         {
             DLList<entry*>::iterator wcLink =
                 patternEntries_.begin();

src/OpenFOAM/db/dictionary/primitiveEntry/primitiveEntry.C

@@ -113,15 +113,19 @@ Foam::dictionary& Foam::primitiveEntry::dict()
 }
 
 
-void Foam::primitiveEntry::insert(const tokenList& varTokens, const label i)
+void Foam::primitiveEntry::insert
+(
+    const tokenList& varTokens,
+    const label posI
+)
 {
     tokenList& tokens = *this;
 
-    if (!varTokens.size())
+    if (varTokens.empty())
     {
         label end = tokens.size() - 1;
 
-        for(label j=i; j<end; j++)
+        for (label j=posI; j<end; j++)
         {
             tokens[j] = tokens[j+1];
         }
@@ -135,7 +139,7 @@ void Foam::primitiveEntry::insert(const tokenList& varTokens, const label i)
         label end = tokens.size() - 1;
         label offset = varTokens.size() - 1;
 
-        for(label j=end; j>i; j--)
+        for (label j=end; j>posI; j--)
         {
             tokens[j] = tokens[j-offset];
         }
@@ -143,7 +147,7 @@ void Foam::primitiveEntry::insert(const tokenList& varTokens, const label i)
 
     forAll(varTokens, j)
     {
-        tokens[i + j] = varTokens[j];
+        tokens[posI + j] = varTokens[j];
     }
 }
 

src/OpenFOAM/db/dictionary/primitiveEntry/primitiveEntry.H

@@ -58,7 +58,7 @@ namespace Foam
 class dictionary;
 
 /*---------------------------------------------------------------------------*\
-                           Class primitiveEntry Declaration
+                       Class primitiveEntry Declaration
 \*---------------------------------------------------------------------------*/
 
 class primitiveEntry
@@ -99,8 +99,8 @@ public:
         //- Read the complete entry from the given stream
         void readEntry(const dictionary&, Istream&);
 
-        //- Insert the given tokens at token i
-        void insert(const tokenList&, const label i);
+        //- Insert the given tokens at token posI
+        void insert(const tokenList&, const label posI);
 
 
 public:

src/OpenFOAM/db/regIOobject/regIOobjectWrite.C

@@ -55,7 +55,7 @@ bool regIOobject::writeObject
         return false;
     }
 
-    if (!instance().size())
+    if (instance().empty())
     {
         SeriousErrorIn("regIOobject::write()")
             << "instance undefined for object " << name()

src/OpenFOAM/fields/Fields/symmTensorField/symmTensorField.C

@@ -50,7 +50,7 @@ UNARY_FUNCTION(symmTensor, symmTensor, cof)
 
 void inv(Field<symmTensor>& tf, const UList<symmTensor>& tf1)
 {
-    if (!tf.size())
+    if (tf.empty())
     {
         return;
     }

src/OpenFOAM/fields/Fields/tensorField/tensorField.C

@@ -49,7 +49,7 @@ UNARY_FUNCTION(tensor, tensor, cof)
 
 void inv(Field<tensor>& tf, const UList<tensor>& tf1)
 {
-    if (!tf.size())
+    if (tf.empty())
     {
         return;
     }

src/OpenFOAM/interpolations/patchToPatchInterpolation/CalcPatchToPatchWeights.C

@@ -312,7 +312,7 @@ void PatchToPatchInterpolation<FromPatch, ToPatch>::calcFaceAddressing() const
             if
             (
                 m < directHitTol                            // Direct hit
-             || neighbours.size() == 0
+             || neighbours.empty()
             )
             {
                 faceWeights.set(faceI, new scalarField(1));

src/OpenFOAM/meshes/bandCompression/bandCompression.C

@@ -73,7 +73,7 @@ labelList bandCompression(const labelListList& cellCellAddressing)
             // neighbours. If the neighbour in question has not been visited,
             // add it to the end of the nextCell list
 
-            while (nextCell.size() > 0)
+            while (nextCell.size())
             {
                 currentCell = nextCell.removeHead();
 

src/OpenFOAM/meshes/boundBox/boundBox.C

@@ -50,7 +50,7 @@ const Foam::boundBox Foam::boundBox::invertedBox
 
 void Foam::boundBox::calculate(const pointField& points, const bool doReduce)
 {
-    if (points.size() == 0)
+    if (points.empty())
     {
         min_ = point::zero;
         max_ = point::zero;

src/OpenFOAM/meshes/meshTools/matchPoints.C

@@ -49,7 +49,7 @@ bool Foam::matchPoints
 
     if (origin == point(VGREAT, VGREAT, VGREAT))
     {
-        if (pts1.size() > 0)
+        if (pts1.size())
         {
             compareOrigin = sum(pts1)/pts1.size();
         }

src/OpenFOAM/meshes/meshTools/mergePoints.C

@@ -44,7 +44,7 @@ bool Foam::mergePoints
 
     if (origin == point(VGREAT, VGREAT, VGREAT))
     {
-        if (points.size() > 0)
+        if (points.size())
         {
             compareOrigin = sum(points)/points.size();
         }
@@ -57,7 +57,7 @@ bool Foam::mergePoints
     // Storage for merged points
     newPoints.setSize(points.size());
 
-    if (points.size() == 0)
+    if (points.empty())
     {
         return false;
     }

src/OpenFOAM/meshes/pointMesh/pointMeshMapper/pointMapper.C

@@ -97,7 +97,7 @@ void Foam::pointMapper::calcAddressing() const
 
             label pointI = cfc[cfcI].index();
 
-            if (addr[pointI].size() > 0)
+            if (addr[pointI].size())
             {
                 FatalErrorIn("void pointMapper::calcAddressing() const")
                     << "Master point " << pointI
@@ -118,7 +118,7 @@ void Foam::pointMapper::calcAddressing() const
 
         forAll (cm, pointI)
         {
-            if (cm[pointI] > -1 && addr[pointI].size() == 0)
+            if (cm[pointI] > -1 && addr[pointI].empty())
             {
                 // Mapped from a single point
                 addr[pointI] = labelList(1, cm[pointI]);
@@ -135,7 +135,7 @@ void Foam::pointMapper::calcAddressing() const
 
         forAll (addr, pointI)
         {
-            if (addr[pointI].size() == 0)
+            if (addr[pointI].empty())
             {
                 // Mapped from a dummy point. Take point 0 with weight 1.
                 addr[pointI] = labelList(1, 0);
@@ -175,7 +175,7 @@ Foam::pointMapper::pointMapper(const pointMesh& pMesh, const mapPolyMesh& mpm)
     insertedPointLabelsPtr_(NULL)
 {
     // Check for possibility of direct mapping
-    if (mpm_.pointsFromPointsMap().size() == 0)
+    if (mpm_.pointsFromPointsMap().empty())
     {
         direct_ = true;
     }
@@ -185,7 +185,7 @@ Foam::pointMapper::pointMapper(const pointMesh& pMesh, const mapPolyMesh& mpm)
     }
 
     // Check for inserted points
-    if (direct_ && (mpm_.pointMap().size() == 0 || min(mpm_.pointMap()) > -1))
+    if (direct_ && (mpm_.pointMap().empty() || min(mpm_.pointMap()) > -1))
     {
         insertedPoints_ = false;
     }

src/OpenFOAM/meshes/polyMesh/mapPolyMesh/cellMapper/cellMapper.C

@@ -86,7 +86,7 @@ void Foam::cellMapper::calcAddressing() const
 
         weightsPtr_ = new scalarListList(mesh_.nCells());
         scalarListList& w = *weightsPtr_;
-        
+
         const List<objectMap>& cfp = mpm_.cellsFromPointsMap();
 
         forAll (cfp, cfpI)
@@ -96,7 +96,7 @@ void Foam::cellMapper::calcAddressing() const
 
             label cellI = cfp[cfpI].index();
 
-            if (addr[cellI].size() > 0)
+            if (addr[cellI].size())
             {
                 FatalErrorIn("void cellMapper::calcAddressing() const")
                     << "Master cell " << cellI
@@ -118,7 +118,7 @@ void Foam::cellMapper::calcAddressing() const
 
             label cellI = cfe[cfeI].index();
 
-            if (addr[cellI].size() > 0)
+            if (addr[cellI].size())
             {
                 FatalErrorIn("void cellMapper::calcAddressing() const")
                     << "Master cell " << cellI
@@ -140,7 +140,7 @@ void Foam::cellMapper::calcAddressing() const
 
             label cellI = cff[cffI].index();
 
-            if (addr[cellI].size() > 0)
+            if (addr[cellI].size())
             {
                 FatalErrorIn("void cellMapper::calcAddressing() const")
                     << "Master cell " << cellI
@@ -162,7 +162,7 @@ void Foam::cellMapper::calcAddressing() const
 
             label cellI = cfc[cfcI].index();
 
-            if (addr[cellI].size() > 0)
+            if (addr[cellI].size())
             {
                 FatalErrorIn("void cellMapper::calcAddressing() const")
                     << "Master cell " << cellI
@@ -183,7 +183,7 @@ void Foam::cellMapper::calcAddressing() const
 
         forAll (cm, cellI)
         {
-            if (cm[cellI] > -1 && addr[cellI].size() == 0)
+            if (cm[cellI] > -1 && addr[cellI].empty())
             {
                 // Mapped from a single cell
                 addr[cellI] = labelList(1, cm[cellI]);
@@ -200,7 +200,7 @@ void Foam::cellMapper::calcAddressing() const
 
         forAll (addr, cellI)
         {
-            if (addr[cellI].size() == 0)
+            if (addr[cellI].empty())
             {
                 // Mapped from a dummy cell
                 addr[cellI] = labelList(1, 0);
@@ -242,10 +242,10 @@ Foam::cellMapper::cellMapper(const mapPolyMesh& mpm)
     // Check for possibility of direct mapping
     if
     (
-        mpm_.cellsFromPointsMap().size() == 0
-     && mpm_.cellsFromEdgesMap().size() == 0
-     && mpm_.cellsFromFacesMap().size() == 0
-     && mpm_.cellsFromCellsMap().size() == 0
+        mpm_.cellsFromPointsMap().empty()
+     && mpm_.cellsFromEdgesMap().empty()
+     && mpm_.cellsFromFacesMap().empty()
+     && mpm_.cellsFromCellsMap().empty()
     )
     {
         direct_ = true;
@@ -256,7 +256,7 @@ Foam::cellMapper::cellMapper(const mapPolyMesh& mpm)
     }
 
     // Check for inserted cells
-    if (direct_ && (mpm_.cellMap().size() == 0 || min(mpm_.cellMap()) > -1))
+    if (direct_ && (mpm_.cellMap().empty() || min(mpm_.cellMap()) > -1))
     {
         insertedCells_ = false;
     }
@@ -412,7 +412,7 @@ const Foam::labelList& Foam::cellMapper::insertedObjectLabels() const
 
     return *insertedCellLabelsPtr_;
 }
-        
+
 
 // * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
 

src/OpenFOAM/meshes/polyMesh/mapPolyMesh/faceMapper/faceMapper.C

@@ -96,7 +96,7 @@ void Foam::faceMapper::calcAddressing() const
 
             label faceI = ffp[ffpI].index();
 
-            if (addr[faceI].size() > 0)
+            if (addr[faceI].size())
             {
                 FatalErrorIn("void faceMapper::calcAddressing() const")
                     << "Master face " << faceI
@@ -118,7 +118,7 @@ void Foam::faceMapper::calcAddressing() const
 
             label faceI = ffe[ffeI].index();
 
-            if (addr[faceI].size() > 0)
+            if (addr[faceI].size())
             {
                 FatalErrorIn("void faceMapper::calcAddressing() const")
                     << "Master face " << faceI
@@ -140,7 +140,7 @@ void Foam::faceMapper::calcAddressing() const
 
             label faceI = fff[fffI].index();
 
-            if (addr[faceI].size() > 0)
+            if (addr[faceI].size())
             {
                 FatalErrorIn("void faceMapper::calcAddressing() const")
                     << "Master face " << faceI
@@ -160,7 +160,7 @@ void Foam::faceMapper::calcAddressing() const
 
         forAll (fm, faceI)
         {
-            if (fm[faceI] > -1 && addr[faceI].size() == 0)
+            if (fm[faceI] > -1 && addr[faceI].empty())
             {
                 // Mapped from a single face
                 addr[faceI] = labelList(1, fm[faceI]);
@@ -178,7 +178,7 @@ void Foam::faceMapper::calcAddressing() const
 
         forAll (addr, faceI)
         {
-            if (addr[faceI].size() == 0)
+            if (addr[faceI].empty())
             {
                 // Mapped from a dummy face
                 addr[faceI] = labelList(1, 0);
@@ -220,9 +220,9 @@ Foam::faceMapper::faceMapper(const mapPolyMesh& mpm)
     // Check for possibility of direct mapping
     if
     (
-        mpm_.facesFromPointsMap().size() == 0
-     && mpm_.facesFromEdgesMap().size() == 0
-     && mpm_.facesFromFacesMap().size() == 0
+        mpm_.facesFromPointsMap().empty() 
+     && mpm_.facesFromEdgesMap().empty()
+     && mpm_.facesFromFacesMap().empty()
     )
     {
         direct_ = true;
@@ -233,7 +233,7 @@ Foam::faceMapper::faceMapper(const mapPolyMesh& mpm)
     }
 
     // Check for inserted faces
-    if (direct_ && (mpm_.faceMap().size() == 0 || min(mpm_.faceMap()) > -1))
+    if (direct_ && (mpm_.faceMap().empty() || min(mpm_.faceMap()) > -1))
     {
         insertedFaces_ = false;
     }

src/OpenFOAM/meshes/polyMesh/mapPolyMesh/mapDistribute/mapDistribute.C

@@ -48,12 +48,12 @@ Foam::List<Foam::labelPair> Foam::mapDistribute::schedule
         {
             if (procI != Pstream::myProcNo())
             {
-                if (subMap[procI].size() > 0)
+                if (subMap[procI].size())
                 {
                     // I need to send to procI
                     commsSet.insert(labelPair(Pstream::myProcNo(), procI));
                 }
-                if (constructMap[procI].size() > 0)
+                if (constructMap[procI].size())
                 {
                     // I need to receive from procI
                     commsSet.insert(labelPair(procI, Pstream::myProcNo()));
@@ -288,7 +288,7 @@ void Foam::mapDistribute::compact(const boolList& elemIsUsed)
         {
             const labelList& map = constructMap_[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 boolList& subField = sendFields[domain];
                 subField.setSize(map.size());
@@ -315,7 +315,7 @@ void Foam::mapDistribute::compact(const boolList& elemIsUsed)
         {
             const labelList& map = subMap_[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 recvFields[domain].setSize(map.size());
                 IPstream::read

src/OpenFOAM/meshes/polyMesh/mapPolyMesh/mapDistribute/mapDistributeTemplates.C

@@ -50,7 +50,7 @@ void Foam::mapDistribute::distribute
         {
             const labelList& map = subMap[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 List<T> subField(map.size());
                 forAll(map, i)
@@ -86,7 +86,7 @@ void Foam::mapDistribute::distribute
         {
             const labelList& map = constructMap[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 IPstream fromNbr(Pstream::blocking, domain);
                 List<T> subField(fromNbr);
@@ -227,7 +227,7 @@ void Foam::mapDistribute::distribute
         {
             const labelList& map = subMap[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 List<T>& subField = sendFields[domain];
                 subField.setSize(map.size());
@@ -254,7 +254,7 @@ void Foam::mapDistribute::distribute
         {
             const labelList& map = constructMap[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 recvFields[domain].setSize(map.size());
                 IPstream::read
@@ -303,14 +303,14 @@ void Foam::mapDistribute::distribute
 
         OPstream::waitRequests();
         IPstream::waitRequests();
-        
+
         // Collect neighbour fields
 
         for (label domain = 0; domain < Pstream::nProcs(); domain++)
         {
             const labelList& map = constructMap[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 if (recvFields[domain].size() != map.size())
                 {
@@ -372,7 +372,7 @@ void Foam::mapDistribute::distribute
         {
             const labelList& map = subMap[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 List<T> subField(map.size());
                 forAll(map, i)
@@ -409,7 +409,7 @@ void Foam::mapDistribute::distribute
         {
             const labelList& map = constructMap[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 IPstream fromNbr(Pstream::blocking, domain);
                 List<T> subField(fromNbr);
@@ -550,7 +550,7 @@ void Foam::mapDistribute::distribute
         {
             const labelList& map = subMap[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 List<T>& subField = sendFields[domain];
                 subField.setSize(map.size());
@@ -577,7 +577,7 @@ void Foam::mapDistribute::distribute
         {
             const labelList& map = constructMap[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 recvFields[domain].setSize(map.size());
                 IPstream::read
@@ -625,14 +625,14 @@ void Foam::mapDistribute::distribute
 
         OPstream::waitRequests();
         IPstream::waitRequests();
-        
+
         // Collect neighbour fields
 
         for (label domain = 0; domain < Pstream::nProcs(); domain++)
         {
             const labelList& map = constructMap[domain];
 
-            if (domain != Pstream::myProcNo() && map.size() > 0)
+            if (domain != Pstream::myProcNo() && map.size())
             {
                 if (recvFields[domain].size() != map.size())
                 {

src/OpenFOAM/meshes/polyMesh/polyBoundaryMesh/polyBoundaryMesh.C

@@ -251,7 +251,7 @@ Foam::polyBoundaryMesh::neighbourEdges() const
             }
         }
 
-        if (pointsToEdge.size() > 0)
+        if (pointsToEdge.size())
         {
             FatalErrorIn("polyBoundaryMesh::neighbourEdges() const")
                 << "Not all boundary edges of patches match up." << nl
@@ -425,7 +425,7 @@ Foam::labelHashSet Foam::polyBoundaryMesh::patchSet
         // of all patch names for matches
         labelList patchIDs = findStrings(patchNames[i], allPatchNames);
 
-        if (patchIDs.size() == 0)
+        if (patchIDs.empty())
         {
             WarningIn("polyBoundaryMesh::patchSet(const wordList&)")
                 << "Cannot find any patch names matching " << patchNames[i]

src/OpenFOAM/meshes/polyMesh/polyMesh.C

@@ -814,7 +814,7 @@ void Foam::polyMesh::addPatches
     const bool validBoundary
 )
 {
-    if (boundaryMesh().size() > 0)
+    if (boundaryMesh().size())
     {
         FatalErrorIn
         (
@@ -858,12 +858,7 @@ void Foam::polyMesh::addZones
     const List<cellZone*>& cz
 )
 {
-    if
-    (
-        pointZones().size() > 0
-     || faceZones().size() > 0
-     || cellZones().size() > 0
-    )
+    if (pointZones().size() || faceZones().size() || cellZones().size())
     {
         FatalErrorIn
         (

src/OpenFOAM/meshes/polyMesh/polyPatches/basic/coupled/coupledPolyPatch.H

@@ -47,7 +47,7 @@ namespace Foam
 {
 
 /*---------------------------------------------------------------------------*\
-                       Class coupledPolyPatch Declaration
+                      Class coupledPolyPatch Declaration
 \*---------------------------------------------------------------------------*/
 
 class coupledPolyPatch
@@ -256,7 +256,7 @@ public:
             //- Are the cyclic planes parallel
             bool parallel() const
             {
-                return forwardT_.size() == 0;
+                return forwardT_.empty();
             }
 
             //- Return face transformation tensor

src/OpenFOAM/meshes/polyMesh/polyPatches/constraint/cyclic/cyclicPolyPatch.C

@@ -86,7 +86,7 @@ Foam::label Foam::cyclicPolyPatch::findMaxArea
 
 void Foam::cyclicPolyPatch::calcTransforms()
 {
-    if (size() > 0)
+    if (size())
     {
         const pointField& points = this->points();
 
@@ -1111,7 +1111,7 @@ bool Foam::cyclicPolyPatch::order
     rotation.setSize(pp.size());
     rotation = 0;
 
-    if (pp.size() == 0)
+    if (pp.empty())
     {
         // No faces, nothing to change.
         return false;

src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchAddressing.C

@@ -211,7 +211,7 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::calcAddressing()
 
             forAll (neiFaces, nfI)
             {
-                if (neiFaces[nfI].size() > 0 && neiFaces[nfI][0] < minNei)
+                if (neiFaces[nfI].size() && neiFaces[nfI][0] < minNei)
                 {
                     nextNei = nfI;
                     minNei = neiFaces[nfI][0];

src/OpenFOAM/meshes/primitiveMesh/PrimitivePatch/PrimitivePatchLocalPointOrder.C

@@ -127,7 +127,7 @@ void PrimitivePatch<Face, FaceList, PointField, PointType>::
                         }
                     }
                 }
-            } while (faceOrder.size() > 0);
+            } while (faceOrder.size());
         }
     }
 

src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraCleanup.C

@@ -53,7 +53,7 @@ checkEdges
 
         // boundary edges have one face
         // interior edges have two faces
-        if (myFaces.size() == 0)
+        if (myFaces.empty())
         {
             FatalErrorIn
             (

src/OpenFOAM/meshes/primitiveMesh/PrimitivePatchExtra/PrimitivePatchExtraSearch.C

@@ -97,12 +97,12 @@ void Foam::PrimitivePatchExtra<Face, FaceList, PointField, PointType>::markZone
             }
         }
 
-        if (newChangedFaces.size() == 0)
+        if (newChangedFaces.empty())
         {
             break;
         }
 
-        // New dynamicList: can leave dynamicList unshrunk
+        // transfer from dynamic to normal list
         changedFaces.transfer(newChangedFaces);
     }
 }

src/OpenFOAM/meshes/primitiveMesh/primitiveMeshCheck/primitiveMeshCheck.C

@@ -760,7 +760,7 @@ bool primitiveMesh::checkPoints
 
     forAll (pf, pointI)
     {
-        if (pf[pointI].size() == 0)
+        if (pf[pointI].empty())
         {
             if (setPtr)
             {
@@ -776,7 +776,7 @@ bool primitiveMesh::checkPoints
     {
         const labelList& pc = pointCells(pointI);
 
-        if (pc.size() == 0)
+        if (pc.empty())
         {
             if (setPtr)
             {

src/OpenFOAM/meshes/primitiveMesh/primitivePatch/patchZones.C

@@ -130,7 +130,7 @@ void patchZones::markZone(label faceI)
                 << endl;
         }
 
-        if (changedEdges.size() == 0)
+        if (changedEdges.empty())
         {
             break;
         }
@@ -144,7 +144,7 @@ void patchZones::markZone(label faceI)
                 << endl;
         }
 
-        if (changedFaces.size() == 0)
+        if (changedEdges.empty())
         {
             break;
         }

src/OpenFOAM/meshes/primitiveMesh/primitivePatch/walkPatch.C

@@ -29,22 +29,14 @@ Description
 #include "walkPatch.H"
 #include "ListOps.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-
-namespace Foam
-{
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-defineTypeNameAndDebug(walkPatch, 0);
-
+// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
+defineTypeNameAndDebug(Foam::walkPatch, 0);
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
 // Get other face using v0, v1 (in localFaces numbering). Or -1.
-label walkPatch::getNeighbour
+Foam::label Foam::walkPatch::getNeighbour
 (
     const label faceI,
     const label fp,
@@ -104,19 +96,11 @@ label walkPatch::getNeighbour
 
     const labelList& eFaces = pp_.edgeFaces()[nbrEdgeI];
 
-    if (eFaces.size() > 2 || eFaces.size() <= 0)
-    {
-        FatalErrorIn("getNeighbour")
-            << "Illegal surface on patch. Face " << faceI
-            << " at vertices " << v0 << ',' << v1 << " has more than 2"
-            << " or less than 1 neighbours" << abort(FatalError);
-        return -1;
-    }
-    else if (eFaces.size() == 1)
+    if (eFaces.size() == 1)
     {
         return -1;
     }
-    else
+    else if (eFaces.size() == 2)
     {
         label nbrFaceI = eFaces[0];
 
@@ -127,12 +111,21 @@ label walkPatch::getNeighbour
 
         return nbrFaceI;
     }
+    else
+    {
+        FatalErrorIn("getNeighbour")
+            << "Illegal surface on patch. Face " << faceI
+            << " at vertices " << v0 << ',' << v1
+            << " has fewer than 1 or more than 2 neighbours"
+            << abort(FatalError);
+        return -1;
+    }
 }
 
 
 // Gets labels of changed faces and enterVertices on faces.
 // Returns labels of faces changed and enterVertices on them.
-void walkPatch::faceToFace
+void Foam::walkPatch::faceToFace
 (
     const labelList& changedFaces,
     const labelList& enterVerts,
@@ -149,7 +142,7 @@ void walkPatch::faceToFace
     {
         label faceI = changedFaces[i];
         label enterVertI = enterVerts[i];
- 
+
         if (!visited_[faceI])
         {
             // Do this face
@@ -225,7 +218,7 @@ Foam::walkPatch::walkPatch
     // Corresponding list of entry vertices
     labelList enterVerts(1, enterVertI);
 
-    while(1)
+    while (true)
     {
         labelList nbrFaces;
         labelList nbrEnterVerts;
@@ -240,7 +233,7 @@ Foam::walkPatch::walkPatch
         );
 
 
-        if (nbrFaces.size() == 0)
+        if (nbrFaces.empty())
         {
             break;
         }
@@ -254,8 +247,4 @@ Foam::walkPatch::walkPatch
 }
 
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
 // ************************************************************************* //

src/OpenFOAM/primitives/bools/bool/bool.H

@@ -26,8 +26,7 @@ Primitive
     bool
 
 Description
-    C++ 4.0 supports a builtin type bool but older compilers do not.
-    This is a simple typedef to emulate the standard bool type.
+    System bool
 
 SourceFiles
     boolIO.C

src/OpenFOAM/primitives/bools/bool/boolIO.C

@@ -23,10 +23,9 @@ License
     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 
 Description
-    Reads an bool from an input stream, for a given version
-    number and File format. If an ascii File is being read,
-    then the line numbers are counted and an erroneous read
-    ised.
+    Reads an bool from an input stream, for a given version number and file
+    format. If an ASCII file is being read, then the line numbers are counted
+    and an erroneous read is reported.
 
 \*---------------------------------------------------------------------------*/
 

src/OpenFOAM/primitives/nil/nil.H

@@ -26,7 +26,10 @@ Class
     Foam::nil
 
 Description
-    A class without any storage. Used, for example, in HashSet.
+    A zero-sized class without any storage. Used, for example, in HashSet.
+
+Note
+    A zero-sized class actually does still require at least 1 byte storage.
 
 \*---------------------------------------------------------------------------*/
 

src/OpenFOAM/primitives/strings/fileName/fileName.C

@@ -238,9 +238,9 @@ void Foam::fileName::operator=(const char* str)
 
 Foam::fileName Foam::operator/(const string& a, const string& b)
 {
-    if (a.size() > 0)       // First string non-null
+    if (a.size())           // First string non-null
     {
-        if (b.size() > 0)   // Second string non-null
+        if (b.size())       // Second string non-null
         {
             return fileName(a + '/' + b);
         }
@@ -251,7 +251,7 @@ Foam::fileName Foam::operator/(const string& a, const string& b)
     }
     else                    // First string null
     {
-        if (b.size() > 0)   // Second string non-null
+        if (b.size())       // Second string non-null
         {
             return b;
         }

src/OpenFOAM/primitives/strings/word/wordI.H

@@ -162,17 +162,17 @@ inline void Foam::word::operator=(const char* q)
 
 inline Foam::word Foam::operator&(const word& a, const word& b)
 {
-    if (!b.size())
-    {
-        return a;
-    }
-    else
+    if (b.size())
     {
         string ub = b;
         ub.string::operator[](0) = char(toupper(ub.string::operator[](0)));
 
         return a + ub;
     }
+    else
+    {
+        return a;
+    }
 }
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

src/OpenFOAM/primitives/strings/word/wordIO.C

@@ -61,7 +61,7 @@ Foam::Istream& Foam::operator>>(Istream& is, word& w)
         string::stripInvalid<word>(w);
 
         // flag empty strings and bad chars as an error
-        if (!w.size() || w.size() != t.stringToken().size())
+        if (w.empty() || w.size() != t.stringToken().size())
         {
             is.setBad();
             FatalIOErrorIn("operator>>(Istream&, word&)", is)

src/Pstream/gamma/OPwrite.C

@@ -98,7 +98,7 @@ bool OPstream::write
             << Foam::abort(FatalError);
     }
 
-    if (maxSendSize.size() == 0)
+    if (maxSendSize.empty())
     {
         // Intialize maxSendSize to the initial size of the receive buffers.
         maxSendSize.setSize(Pstream::nProcs());

src/Pstream/mpi/IPread.C

@@ -191,7 +191,7 @@ Foam::label Foam::IPstream::read
 
 void Foam::IPstream::waitRequests()
 {
-    if (IPstream_outstandingRequests_.size() > 0)
+    if (IPstream_outstandingRequests_.size())
     {
         if
         (