List: Added construction from and assignment to zero

src/OpenFOAM/containers/Lists/List/List.C

@@ -79,6 +79,30 @@ Foam::List<T>::List(const label s, const T& a)
 }
 
 
+template<class T>
+Foam::List<T>::List(const label s, const zero)
+:
+    UList<T>(NULL, s)
+{
+    if (this->size_ < 0)
+    {
+        FatalErrorInFunction
+            << "bad size " << this->size_
+            << abort(FatalError);
+    }
+
+    if (this->size_)
+    {
+        this->v_ = new T[this->size_];
+
+        List_ACCESS(T, (*this), vp);
+        List_FOR_ALL((*this), i)
+            List_ELEM((*this), vp, i) = Zero;
+        List_END_FOR_ALL
+    }
+}
+
+
 template<class T>
 Foam::List<T>::List(const List<T>& a)
 :

src/OpenFOAM/containers/Lists/List/List.H

@@ -105,6 +105,9 @@ public:
         //- Construct with given size and value for all elements.
         List(const label, const T&);
 
+        //- Construct with given size initializing all elements to zero.
+        List(const label, const zero);
+
         //- Copy constructor.
         List(const List<T>&);
 
@@ -225,6 +228,9 @@ public:
         //- Assignment of all entries to the given value
         inline void operator=(const T&);
 
+        //- Assignment of all entries to zero
+        inline void operator=(const zero);
+
 
     // Istream operator
 

src/OpenFOAM/containers/Lists/List/ListI.H

@@ -141,4 +141,11 @@ inline void Foam::List<T>::operator=(const T& t)
 }
 
 
+template<class T>
+inline void Foam::List<T>::operator=(const zero)
+{
+    UList<T>::operator=(Zero);
+}
+
+
 // ************************************************************************* //

src/OpenFOAM/containers/Lists/UList/UList.C

@@ -76,6 +76,16 @@ void Foam::UList<T>::operator=(const T& t)
 }
 
 
+template<class T>
+void Foam::UList<T>::operator=(const zero)
+{
+    List_ACCESS(T, (*this), vp);
+    List_FOR_ALL((*this), i)
+        List_ELEM((*this), vp, i) = Zero;
+    List_END_FOR_ALL
+}
+
+
 // * * * * * * * * * * * * * * STL Member Functions  * * * * * * * * * * * * //
 
 template<class T>

src/OpenFOAM/containers/Lists/UList/UList.H

@@ -46,6 +46,7 @@ SourceFiles
 #include "label.H"
 #include "uLabel.H"
 #include "nullObject.H"
+#include "zero.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -223,6 +224,9 @@ public:
         //- Assignment of all entries to the given value
         void operator=(const T&);
 
+        //- Assignment of all entries to zero
+        void operator=(const zero);
+
 
     // STL type definitions