No Str() for Double?

If i call `str()` on Double, seems it gets coerced to Float first and that doesn't always end well:

BSD> d = 1e40#
BSD> ? d, type(d)
 1e+40                 Double
BSD> ? str(d)
 inf
BSD> ? d.toStr()
Member function not found in BrightScript Component or interface. (runtime error &hf4) in $LIVECOMPILE(153)

Comments? Is there interface like ifIntOps.toStr() tucked somewhere?