added HashSet::operator[]() const

- can use the same syntax for boolList, PackedBoolList and labelHashSet
    if (myHashedSet[x]) ...
    if (myBoolList[x]) ...
    if (myPackedList[x]) ...

applications/test/HashSet/hashSetTest.C

@@ -111,6 +111,33 @@ int main(int argc, char *argv[])
     Info<< "setD : " << setD << endl;
     Info<< "setB ^ setC ^ setD : " << (setB ^ setC ^ setD) << endl;
 
+    // test operator[]
+
+    Info<< "setD : " << setD << endl;
+    if (setD[0])
+    {
+        Info<< "setD has 0" << endl;
+    }
+    else
+    {
+        Info<< "setD has no 0" << endl;
+    }
+
+
+    if (setD[11])
+    {
+        Info<< "setD has 11" << endl;
+    }
+    else
+    {
+        Info<< "setD has no 0" << endl;
+    }
+
+    Info<< "setD : " << setD << endl;
+
+    // this doesn't work (yet?)
+    // setD[12] = true;
+
     return 0;
 }
 

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

@@ -51,6 +51,13 @@ Foam::HashSet<Key, Hash>::HashSet(const HashTable<AnyType, Key, Hash>& ht)
 
 // * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
 
+template<class Key, class Hash>
+inline bool Foam::HashSet<Key, Hash>::operator[](const Key& key) const
+{
+    return found(key);
+}
+
+
 template<class Key, class Hash>
 bool Foam::HashSet<Key, Hash>::operator==(const HashSet<Key, Hash>& rhs) const
 {

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

@@ -133,9 +133,11 @@ public:
             return HashTable<nil, Key, Hash>::insert(key, nil());
         }
 
-
     // Member Operators
 
+        //- Return true if the entry exists, same as found()
+        inline bool operator[](const Key&) const;
+
         //- Equality. Two hashtables are equal when their contents are equal.
         //  Independent of table size or order.
         bool operator==(const HashSet<Key, Hash>&) const;