+#define bool int
+#define true 1
+#define false 0
+
+struct CSolver;
+typedef struct CSolver CSolver;
+
+struct Constraint;
+typedef struct Constraint Constraint;
+
+struct Boolean;
+typedef struct Boolean Boolean;
+
+struct IncrementalSolver;
+typedef struct IncrementalSolver IncrementalSolver;
+
+struct Set;
+typedef struct Set Set;
+
+typedef struct Set MutableSet;
+
+struct Element;
+typedef struct Element Element;
+
+struct Function;
+typedef struct Function Function;
+
+struct Predicate;
+typedef struct Predicate Predicate;
+
+struct Table;
+typedef struct Table Table;
+
+struct Order;
+typedef struct Order Order;
+
+struct ElementEncoding;
+typedef struct ElementEncoding ElementEncoding;