[Issue 9937] CTFE floats don't overflow correctly

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9937



--- Comment #4 from Don <clugdbug at yahoo.com.au> 2013-04-19 00:57:55 PDT ---
(In reply to comment #3)
> You're correct for C, as those are the C rules. But this is not true for D.
> 
> Can you be more specific about what you're doing in CTFE that does not work?

Define an IEEE single-precision floating-point constant.
Perhaps this is a better example:

void main()
{
         float f1 = float.max * 2;
   const float f2 = float.max * 2;
   assert(f1 == float.infinity);          // ok
   assert(f1 == f2);                      // ok
   assert(*&f2 == float.infinity);        // even this is OK
   assert(f2 == float.infinity);          // fails!!!!!!!!!!!!!!!!!
}

f2 apparently has two different values at the same time!

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