UList: Rationalize assignment (shallow-copy vs deep-copy)

//- Disallow default shallow-copy assignment
    //
    //  Assignment of UList<T> may need to be either shallow (copy pointer)
    //  or deep (copy elements) depending on context or the particular type
    //  of list derived from UList and it is confusing and prone to error
    //  for the default assignment to be either.  The solution is to
    //  disallow default assignment and provide separate 'shallowCopy' and
    //  'deepCopy' member functions.
    void operator=(const UList<T>&) = delete;

    //- Copy the pointer held by the given UList.
    inline void shallowCopy(const UList<T>&);

    //- Copy elements of the given UList.
    void deepCopy(const UList<T>&);

applications/utilities/preProcessing/setFields/setFields.C

@@ -2,7 +2,7 @@
   =========                 |
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
-    \\  /    A nd           | Copyright (C) 2011-2015 OpenFOAM Foundation
+    \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
 License
@@ -240,7 +240,7 @@ bool setFaceFieldType
                 field.boundaryField()[patchi].size(),
                 field.boundaryField()[patchi].patch().start()
               - mesh.nInternalFaces()
-            ).assign(field.boundaryField()[patchi]);
+            ) = field.boundaryField()[patchi];
         }
 
         // Override

applications/utilities/preProcessing/viewFactorsGen/viewFactorsGen.C

@@ -424,14 +424,14 @@ int main(int argc, char *argv[])
             (
                 availablePoints,
                 upp.faceCentres().size()
-            ).assign(upp.faceCentres());
+            ) = upp.faceCentres();
 
             SubList<point>
             (
                 availablePoints,
                 upp.localPoints().size(),
                 upp.faceCentres().size()
-            ).assign(upp.localPoints());
+            ) = upp.localPoints();
 
             point cfo = cf;
             scalar dist = GREAT;
@@ -592,8 +592,8 @@ int main(int argc, char *argv[])
     DynamicList<label> compactPatchId(map.constructSize());
 
     // Insert my coarse local values
-    SubList<point>(compactCoarseSf, nCoarseFaces).assign(localCoarseSf);
-    SubList<point>(compactCoarseCf, nCoarseFaces).assign(localCoarseCf);
+    SubList<point>(compactCoarseSf, nCoarseFaces) = localCoarseSf;
+    SubList<point>(compactCoarseCf, nCoarseFaces) = localCoarseCf;
 
     // Insert my fine local values
     label compactI = 0;