Little demo of allowing basic types to implement interfaces. Was in D.annouce

[Rory McGuire]

Just wondering if this exists in the standard library.

I made a function "Implements!(T,I)" that returns true is a given 
type "T" implements the interface "I".

http://dpaste.dzfl.pl/d7a727fd

I've found it really helps with keeping some code clean such as 
the below:
void main() {
	int i = 0x34342343;
	writebytes(i);
}


//enum Order { Big };
//interface IRawBytes { ubyte[] bytes(Order); }
interface IRawBytes { ubyte[] bytes(); }

void writebytes(T)(T item) if (Implements!(T, IRawBytes)) {
	import std.stdio : writeln;
	writeln(item.bytes);
}
ubyte[] bytes(ref int i) {
	ubyte* ptr;
	ptr = cast(ubyte*)&i;
	return ptr[0..i.sizeof];
}

If you decide that IRawBytes.bytes should start taking an Order 
parameter you get the same benefits you would have got if you had 
used classes with an interface.