How to serialize a double.

[H. S. Teoh via Digitalmars-d-learn]

On Thu, Dec 01, 2016 at 12:36:30AM +0000, Jake Pittis via Digitalmars-d-learn wrote:
> How do I convert a double to a ubyte[]?
> 
> I've tried all sorts of things including converting the double to a
> ulong and trying to serialize the ulong. For example test bellow
> fails.
> 
> ````
> unittest {
>     double d = 3.14;
>     ulong l = *cast(ulong*)(&d);
>     double after = *cast(double*)(&l));
>     assert(after == d); // This fails.
> }
> ````

	union U
	{
		ubyte[double.sizeof] bytes;
		double d;
	}
	U u, v;

	u.d = 3.14159;

	v.bytes[] = u.bytes[];
	assert(v.d == 3.14159);


T

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