-Value ::operator double (void) const { assert(0); return 0; }
-Null ::operator double (void) const { return 0; }
-Bool ::operator double (void) const { return static_cast<double>(value); }
-SInt ::operator double (void) const { return static_cast<double>(value); }
-UInt ::operator double (void) const { return static_cast<double>(value); }
-Float ::operator double (void) const { return value; }
-Enum ::operator double (void) const { return static_cast<unsigned long long>(*sig->second); }
+float Value ::toFloat(void) const { assert(0); return 0; }
+float Null ::toFloat(void) const { return 0; }
+float Bool ::toFloat(void) const { return static_cast<float>(value); }
+float SInt ::toFloat(void) const { return static_cast<float>(value); }
+float UInt ::toFloat(void) const { return static_cast<float>(value); }
+float Float ::toFloat(void) const { return value; }
+float Enum ::toFloat(void) const { return static_cast<float>(sig->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); }