class EncodingSubGraph;
class SignatureEnc;
class Signature;
-class ElementSig;
-class SetSig;
+class ValuedSignature;
+class AlloyElementSig;
+class AlloySetSig;
+class AlloyBoolSig;
struct IncrementalSolver;
typedef struct IncrementalSolver IncrementalSolver;
struct TableEntry;