Quantity kind incomplete type

[ToppDev]

Hello,

I tried to get quantity kinds working from the Quantity Kinds documentation, however the compiler always complains about an incomplete type

Compiler-explorer: https://compiler-explorer.com/z/9PorMr417

#include <units/isq/si/length.h>
#include <units/kind.h>

using namespace units;
namespace si = units::isq::si;

struct radius : kind<radius, si::dim_length> {};

int main()
{
    using namespace si::references;
    
    quantity_kind<radius, si::kilometre, double> d(123 * km);
}

Error:

<source>: In function 'int main()':
<source>:13:51: error: variable 'units::quantity_kind<radius, units::isq::si::kilometre, double> d' has initializer but incomplete type
   13 |     quantity_kind<radius, si::kilometre, double> d(123 * km);
      |                                                   ^

Am I maybe missing some include?

[mpusz]

Hi,

Thanks for trying out the library. Yes, you are missing a units/quantity_kind.h header file. See here: https://compiler-explorer.com/z/3Mz6eMdsE.

[ToppDev]

I guess I could have figured that one out from the glide_computer example. There units/quantity_point_kind.h is used which includes units/quantity_kind.h

Thank you very much for your fast answer