Comment by modeless

The KDB code is terse to an unhealthy extreme. Check this gem:

    // remove more clutter
    #define O printf
    #define R return
    #define Z static
    #define P(x,y) {if(x)R(y);}
    #define U(x) P(!(x),0)
    #define SW switch
    #define CS(n,x)	case n:x;break;

https://github.com/KxSystems/kdb/blob/master/c/c/k.h#L96

Or this wall of code:

https://github.com/KxSystems/kdb/blob/master/c/c.cs