hash for floating

[Paolo Invernizzi]

Hi all,

How to implement a proper hash method for a struct/class having 
as a base one or more floating point?

When I compile with the -w flags, dmd 2.063 tells me that the 
function must be size_t toHash() const nothrow @safe.

The point is that the nothrow doesn't permit the std.conv.to 
conversions, while the @safe does not permit the cast().

So how to perform a little math on the floating and then turning 
the result to a proper integer hash?

Suggestions welcome! Thank!

Paolo Invernizzi