-// blob cast
-void * Value ::blob(void) const { assert(0); return NULL; }
-void * Null ::blob(void) const { return NULL; }
-void * Blob ::blob(void) const { return buf; }
-void * Pointer::blob(void) const { assert(value < 0x100000ULL); return (void *)value; }
+// floating point cast
+double Value ::toDouble(void) const { assert(0); return 0; }
+double Null ::toDouble(void) const { return 0; }
+double Bool ::toDouble(void) const { return static_cast<double>(value); }
+double SInt ::toDouble(void) const { return static_cast<double>(value); }
+double UInt ::toDouble(void) const { return static_cast<double>(value); }
+double Float ::toDouble(void) const { return value; }
+double Enum ::toDouble(void) const { return static_cast<double>(sig->value); }
+
+
+// pointer cast
+void * Value ::toPointer(void) const { assert(0); return NULL; }
+void * Null ::toPointer(void) const { return NULL; }
+void * Blob ::toPointer(void) const { return buf; }
+void * Pointer::toPointer(void) const { return (void *)value; }
+
+
+// pointer cast
+unsigned long long Value ::toUIntPtr(void) const { assert(0); return 0; }
+unsigned long long Null ::toUIntPtr(void) const { return 0; }
+unsigned long long Pointer::toUIntPtr(void) const { return value; }
+
+
+// string cast
+const char * Value ::toString(void) const { assert(0); return NULL; }
+const char * Null ::toString(void) const { return NULL; }
+const char * String::toString(void) const { return value; }