[Issue 1681] cast(real) ulong.max == 0

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1681





------- Comment #2 from andrei at metalanguage.com  2007-11-21 14:23 -------
(In reply to comment #1)
> Real is a floating point type, typically 80 bits. Ulong is a 64-bit 
> integer type. Real is not capable of holding a value as large as 
> ulong.max. That is why the assert fails.

Float must store integers with proper successors up to 2 ** 24 - 1. Double must
store integers with proper successors up to 2 ** 53 - 1. Real (i.e.
"double-extended") must store integers with proper successors up to at least 2
** 64 - 1. The program prints 0.


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