On Sat, 13 Apr 2013 18:36:21 +0200, Jeremy DeHaan
<dehaan.jerem...@gmail.com> wrote:
I'm on Windows, and I my compilation was nothing more than "dmd -O
-release main.d" to get the issue I described.
Turns out, the problem starts here:
static const(float) pi = 3.141592654f;
If we compare that to std.math.PI, we see that they're different:
>> writeln( 3.141592654f - std.math.PI );
4.10207e-10
If, however, we assign these values to some temporary floats, we see that
they're equal:
>> float a = 3.141592654f;
>> float b = std.math.PI;
>> writeln( a - b );
0
Replace float with double or real in the above, and the difference
reappears.
So, we have established that 3.141592654f is a valid approximation to pi
for a
float. The problem thus has to be one of precision. I'm not sure if it's a
valid
optimization for the compiler to use doubles instead of floats (it
certainly
seem innocuous enough). I'd say file a bug on it. Worst case, it gets
closed as
invalid.
--
Simen
