ENH: consistency of HashSet setMany(), insertMany() with packed-list version

- this also provides a better separation of the intent
  (ie, inserting a single value, or inserting multiply values)

src/meshTools/cellClassification/cellClassification.C

@@ -300,10 +300,7 @@ void Foam::cellClassification::markCells
 
             // Mark faces of celli
             const labelList& myFaces = mesh_.cells()[celli];
-            forAll(myFaces, myFacei)
-            {
-                outsideFacesMap.insert(myFaces[myFacei]);
-            }
+            outsideFacesMap.insertMany(myFaces);
         }
     }
 

src/meshTools/cellDist/cellDistFuncs.C

@@ -172,11 +172,7 @@ Foam::label Foam::cellDistFuncs::getPointNeighbours
         forAll(f, fp)
         {
             const labelList& pointNbs = patch.pointFaces()[f[fp]];
-
-            forAll(pointNbs, i)
-            {
-                nbs.insert(pointNbs[i]);
-            }
+            nbs.insertMany(pointNbs);
         }
 
         // Subtract ours.

src/meshTools/meshTools/meshTools.C

@@ -301,11 +301,7 @@ void Foam::meshTools::writeOBJ
     forAll(cellLabels, i)
     {
         const cell& cFaces = cells[cellLabels[i]];
-
-        forAll(cFaces, j)
-        {
-            usedFaces.insert(cFaces[j]);
-        }
+        usedFaces.insertMany(cFaces);
     }
 
     writeOBJ(os, faces, points, usedFaces.toc());

src/meshTools/sets/faceSources/normalToFace/normalToFace.C

@@ -160,10 +160,7 @@ void Foam::normalToFace::applyToSet
             }
         }
 
-        forAll(toBeRemoved, i)
-        {
-            set.erase(toBeRemoved[i]);
-        }
+        set.eraseMany(toBeRemoved);
     }
 }
 

src/meshTools/triSurface/triSurfaceTools/triSurfaceTools.C

@@ -384,11 +384,7 @@ Foam::labelHashSet Foam::triSurfaceTools::getCollapsedFaces
     const labelList& myFaces = surf.edgeFaces()[edgeI];
 
     labelHashSet facesToBeCollapsed(2*myFaces.size());
-
-    forAll(myFaces, myFacei)
-    {
-        facesToBeCollapsed.insert(myFaces[myFacei]);
-    }
+    facesToBeCollapsed.insertMany(myFaces);
 
     // From faces using v1 check if they share an edge with faces
     // using v2.