HashTable::erase from list of keys or the keys from another HashTable

- the parameter HashTable can hold arbitrary data .. just the type of keys
  needs to match

src/OpenFOAM/containers/HashTables/HashPtrTable/HashPtrTable.H

@@ -51,17 +51,11 @@ class Ostream;
 
 template<class T, class Key, class Hash> class HashPtrTable;
 
-template<class T, class Key, class Hash> Istream& operator>>
-(
-    Istream&,
-    HashPtrTable<T, Key, Hash>&
-);
+template<class T, class Key, class Hash>
+Istream& operator>>(Istream&, HashPtrTable<T, Key, Hash>&);
 
-template<class T, class Key, class Hash> Ostream& operator<<
-(
-    Ostream&,
-    const HashPtrTable<T, Key, Hash>&
-);
+template<class T, class Key, class Hash>
+Ostream& operator<<(Ostream&, const HashPtrTable<T, Key, Hash>&);
 
 
 /*---------------------------------------------------------------------------*\

src/OpenFOAM/containers/HashTables/HashSet/HashSet.C

@@ -32,19 +32,19 @@ License
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
 template<class Key, class Hash>
-template<class T>
-Foam::HashSet<Key, Hash>::HashSet(const HashTable<T, Key, Hash>& ht)
+template<class AnyType>
+Foam::HashSet<Key, Hash>::HashSet(const HashTable<AnyType, Key, Hash>& ht)
 :
     HashTable<nil, Key, Hash>(ht.size())
 {
     for
     (
-        typename HashTable<T, Key, Hash>::const_iterator iter = ht.begin();
-        iter != ht.end();
-        ++iter
+        typename HashTable<AnyType, Key, Hash>::const_iterator cit = ht.begin();
+        cit != ht.end();
+        ++cit
     )
     {
-        insert(iter.key());
+        insert(cit.key());
     }
 }
 

src/OpenFOAM/containers/HashTables/HashSet/HashSet.H

@@ -112,9 +112,10 @@ public:
             HashTable<nil, Key, Hash>(hs)
         {}
 
-        //- Construct from table of contents of the HashTable
-        template<class T>
-        HashSet(const HashTable<T, Key, Hash>& ht);
+        //- Construct from the keys of another HashTable,
+        //  the type of values held is arbitrary.
+        template<class AnyType>
+        HashSet(const HashTable<AnyType, Key, Hash>&);
 
     // Member Functions
 

src/OpenFOAM/containers/HashTables/HashTable/HashTable.C

@@ -402,22 +402,47 @@ bool Foam::HashTable<T, Key, Hash>::erase(const Key& key)
 
 
 template<class T, class Key, class Hash>
+Foam::label Foam::HashTable<T, Key, Hash>::erase(const UList<Key>& keys)
+{
+    label count = 0;
+
+    // Remove listed keys from this table
+    if (this->size())
+    {
+        forAll(keys, keyI)
+        {
+            if (erase(keys[keyI]))
+            {
+                count++;
+            }
+        }
+    }
+
+    return count;
+}
+
+
+template<class T, class Key, class Hash>
+template<class AnyType>
 Foam::label Foam::HashTable<T, Key, Hash>::erase
 (
-    const HashTable<T, Key, Hash>& rhs
+    const HashTable<AnyType, Key, Hash>& rhs
 )
 {
     label count = 0;
 
     // Remove rhs elements from this table
-    // NOTE: could optimize depending on which hash is smaller
-    for (iterator iter = this->begin(); iter != this->end(); ++iter)
+    if (this->size())
+    {
+        // NOTE: could further optimize depending on which hash is smaller
+        for (iterator iter = begin(); iter != end(); ++iter)
         {
             if (rhs.found(iter.key()) && erase(iter))
             {
                 count++;
             }
         }
+    }
 
     return count;
 }

src/OpenFOAM/containers/HashTables/HashTable/HashTable.H

@@ -51,20 +51,15 @@ namespace Foam
 // Forward declaration of friend functions and operators
 
 template<class T> class List;
+template<class T> class UList;
 template<class T, class Key, class Hash> class HashTable;
 template<class T, class Key, class Hash> class HashPtrTable;
 
-template<class T, class Key, class Hash> Istream& operator>>
-(
-    Istream&,
-    HashTable<T, Key, Hash>&
-);
+template<class T, class Key, class Hash>
+Istream& operator>>(Istream&, HashTable<T, Key, Hash>&);
 
-template<class T, class Key, class Hash> Ostream& operator<<
-(
-    Ostream&,
-    const HashTable<T, Key, Hash>&
-);
+template<class T, class Key, class Hash>
+Ostream& operator<<(Ostream&, const HashTable<T, Key, Hash>&);
 
 
 /*---------------------------------------------------------------------------*\
@@ -203,9 +198,16 @@ public:
             //- Erase an hashedEntry specified by given key if in table
             bool erase(const Key&);
 
-            //- Remove entries in the given HashTable from this HashTable
+            //- Remove entries given by the listed keys from this HashTable
             //  Return the number of elements removed
-            label erase(const HashTable<T, Key, Hash>&);
+            label erase(const UList<Key>&);
+
+            //- Remove entries given by the given keys from this HashTable
+            //  Return the number of elements removed.
+            //  The parameter HashTable needs the same type of keys, but
+            //  but the type of values held is arbitrary.
+            template<class AnyType>
+            label erase(const HashTable<AnyType, Key, Hash>&);
 
             //- Resize the hash table for efficiency
             void resize(const label newSize);

src/conversion/meshTables/cellTable.C

@@ -514,22 +514,32 @@ void Foam::cellTable::combine(const dictionary& mapDict, labelList& tableIds)
         return;
     }
 
-    bool remap = false;
-    labelList mapping(identity(max(this->toc()) + 1));
+    Map<word> origNames(names());
+    labelList mapping(identity(max(origNames.toc()) + 1));
 
+    bool remap = false;
     forAllConstIter(dictionary, mapDict, iter)
     {
-        Map<word> matches = names(wordReList(iter().stream()));
+        wordReList patterns(iter().stream());
+
+        // find all matches
+        Map<word> matches;
+        forAllConstIter(Map<word>, origNames, namesIter)
+        {
+            if (findStrings(patterns, namesIter()))
+            {
+                matches.insert(namesIter.key(), namesIter());
+            }
+        }
 
         if (matches.size())
         {
-            remap = true;
             label targetId = this->findIndex(iter().keyword());
 
             Info<< "combine cellTable: " << iter().keyword();
             if (targetId < 0)
             {
-                // re-use the first element if possible
+                // not found - reuse 1st element but with different name
                 targetId = min(matches.toc());
                 operator[](targetId).set("Label", iter().keyword());
 
@@ -541,19 +551,22 @@ void Foam::cellTable::combine(const dictionary& mapDict, labelList& tableIds)
             }
 
 
+            // the mapping and name for targetId is already okay
+            matches.erase(targetId);
+            origNames.erase(targetId);
+
+            // remove matched names, leaving targetId on 'this'
+            this->erase(matches);
+            origNames.erase(matches);
+
             forAllConstIter(Map<word>, matches, matchIter)
             {
-                label idx = matchIter.key();
-
-                if (idx != targetId && idx >= 0)
-                {
-                    mapping[idx] = targetId;
-                    this->erase(idx);
-                }
-
+                mapping[matchIter.key()] = targetId;
                 Info<< " " << matchIter();
             }
             Info<< " )" << endl;
+
+            remap = true;
         }
     }
 

src/conversion/meshTables/remappingDict

@@ -21,10 +21,11 @@ FoamFile
 //   newName ( listOldNames );
 cellTable
 {
-    fluid ( fluid "[Ff]Luid[0-9]+" "(inlet|outlet)Region" );
+    fluid ( fluid "[Ff]Luid[0-9]+" "(inlet|outlet)Region" "cellTable_[0-9]+" );
     cat1  ( CAT1 "cat1_(Back|Front|Gamma)" );
 }
 
+
 // rename boundary regions
 //   newName oldName;
 boundaryRegion