Another take on decimal data types

[rumbu]

On Saturday, 13 January 2018 at 17:19:31 UTC, kdevel wrote:

> How can I convert a decimalX to float/double/real?

Implicit conversion is not available at library level, D does not 
have an implicit conversion operator;

Subtracting decimalX - real will result in a decimalX. This was a 
design decision, but I'm open to suggestions.

The following code works:

     real r;
     for (r = 1; r < 6; r += .1L) {
         decimal128 d = r;
         auto dsin = sin (d);
         auto rsin = sin (r);
         auto delta = dsin - rsin; //delta is decimal128
         writefln ("%9.2f %30.24f %30.24f %12.4g", r, rsin, dsin, 
delta);
     }

if you really need to convert decimalX values to floating point 
counterparts, you'll need to cast them:

x = cast(real)somedecimalvalue;

(but update your files before this, I discovered a bug in opCast)