Re: union default initialization values

[Adam D Ruppe via Digitalmars-d-learn]

On Tuesday, 5 December 2023 at 19:24:51 UTC, confuzzled wrote:
Given the following union
union F
{
    double x;
    struct {
        ulong lo;
        ulong hi;
    }
}

The default value of this would be `double.init`, since the first 
member of the union is a `double`, which is a kind of NaN. This 
is non-zero.

You can use `double x = 0;` to specify you want it to be zero 
initialized.

    fp.x.writefln!"%20.98f"; // Also, why is precision 
completely lost after 16 digits (18 if I change the type of x 
to real)?

idk about this.