• IM (11/11) Dec 22 2017 The following expression:
• Muld (4/15) Dec 23 2017 C++ complains the same between float and double. Just put 400.0f

IM <3di gm.com> writes:

The following expression:

import std.math : sqrt;
sqrt(400);

produces the following compiler error:

std.math.sqrt called with argument types (int) matches both:
/usr/include/dmd/phobos/std/math.d(1592,7):     
std.math.sqrt(float x)
and:
/usr/include/dmd/phobos/std/math.d(1598,6):     
std.math.sqrt(real x)

Shouldn't it just pick one according to some defined rules?

Muld <2 2.2> writes:

On Saturday, 23 December 2017 at 07:25:34 UTC, IM wrote:
 The following expression:

 import std.math : sqrt;
 sqrt(400);

 produces the following compiler error:

 std.math.sqrt called with argument types (int) matches both:
 /usr/include/dmd/phobos/std/math.d(1592,7):     
 std.math.sqrt(float x)
 and:
 /usr/include/dmd/phobos/std/math.d(1598,6):     
 std.math.sqrt(real x)

 Shouldn't it just pick one according to some defined rules?

C++ complains the same between float and double. Just put 400.0f 
or whatever precision you want to use. I think it's better that 
it doesn't just pick one.