ENH: add constructor/assignment from UIndirectList<label> to PackedList

- more consistent with PackedBoolList

src/OpenFOAM/containers/Lists/PackedList/PackedList.C

@@ -545,6 +545,21 @@ Foam::PackedList<nBits>::operator=(const UList<label>& lst)
 }
 
 
+template<unsigned nBits>
+Foam::PackedList<nBits>&
+Foam::PackedList<nBits>::operator=(const UIndirectList<label>& lst)
+{
+    setCapacity(lst.size());
+    size_ = lst.size();
+
+    forAll(lst, i)
+    {
+        set(i, lst[i]);
+    }
+    return *this;
+}
+
+
 // * * * * * * * * * * * * * *  Friend Operators * * * * * * * * * * * * * * //
 
 template<unsigned nBits>

src/OpenFOAM/containers/Lists/PackedList/PackedList.H

@@ -102,6 +102,7 @@ SourceFiles
 #define PackedList_H
 
 #include "labelList.H"
+#include "UIndirectList.H"
 #include "StaticAssert.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
@@ -228,6 +229,9 @@ public:
         //- Construct from a list of labels
         explicit inline PackedList(const UList<label>&);
 
+        //- Construct from an indirect list of labels
+        explicit inline PackedList(const UIndirectList<label>&);
+
         //- Clone
         inline autoPtr< PackedList<nBits> > clone() const;
 
@@ -388,12 +392,15 @@ public:
             //- Assignment of all entries to the given value. Takes linear time.
             inline PackedList<nBits>& operator=(const unsigned int val);
 
-            //- Assignment operator. Takes linear time.
+            //- Assignment operator.
             PackedList<nBits>& operator=(const PackedList<nBits>&);
 
-            //- Assignment operator. Takes linear time.
+            //- Assignment operator.
             PackedList<nBits>& operator=(const UList<label>&);
 
+            //- Assignment operator.
+            PackedList<nBits>& operator=(const UIndirectList<label>&);
+
 
     // Iterators and helpers
 

src/OpenFOAM/containers/Lists/PackedList/PackedListI.H

@@ -251,6 +251,20 @@ inline Foam::PackedList<nBits>::PackedList(const UList<label>& lst)
 }
 
 
+template<unsigned nBits>
+inline Foam::PackedList<nBits>::PackedList(const UIndirectList<label>& lst)
+:
+    PackedListCore(),
+    StorageList(packedLength(lst.size()), 0u),
+    size_(lst.size())
+{
+    forAll(lst, i)
+    {
+        set(i, lst[i]);
+    }
+}
+
+
 template<unsigned nBits>
 inline Foam::autoPtr<Foam::PackedList<nBits> >
 Foam::PackedList<nBits>::clone() const