On 9/8/15 3:17 AM, Ali Çehreli wrote:
On 09/08/2015 12:00 AM, drug wrote:
import std.array : array;
import std.range : iota;
pragma(msg, typeof(iota(1f, 100f).array)); // why double[] not float[]?
void main()
{
}
It is probably because the type of floating point literals like 1.0 is
double. Probably there is a 1.0 in iota's implementation, converting the
element type to double according to rule number 2 here:
http://dlang.org/type.html#usual-arithmetic-conversions
Yep, here it is:
https://github.com/D-Programming-Language/phobos/blob/master/std/range/package.d#L4630
auto iota(B, E)(B begin, E end)
if (isFloatingPoint!(CommonType!(B, E)))
{
return iota(begin, end, 1.0);
}
Although any such expression can become double easily, I think the
literal should be 1.0f in this case.
I think this warrants a bug report, iota with only floats as parameters
should result in floats.
-Steve
