COMP: backport of updates for gcc-92 compilation

STYLE: add typedefs for interpolation tables

src/OpenFOAM/interpolations/interpolationTable/interpolationTable.H

@@ -104,6 +104,15 @@ class interpolationTable
 
 public:
 
+    // Public Data Types
+
+        //- The element data type
+        typedef Tuple2<scalar, Type> value_type;
+
+        //- The mapped data type
+        typedef Type mapped_type;
+
+
     // Constructors
 
         //- Construct null
@@ -125,8 +134,8 @@ public:
         //  This is a specialised constructor used by patchFields
         interpolationTable(const dictionary& dict);
 
-        //- Construct copy
-        interpolationTable(const interpolationTable& interpTable);
+        //- Copy construct
+        interpolationTable(const interpolationTable& tbl);
 
 
     // Member Functions
@@ -145,6 +154,9 @@ public:
 
     // Member Operators
 
+        //- Copy assignment
+        void operator=(const interpolationTable<Type>& rhs);
+
         //- Return an element of constant Tuple2<scalar, Type>
         const Tuple2<scalar, Type>& operator[](const label) const;