use "alloc"use "die"use "memops"use "endian"use "fmt"use "option"use "result"use "sldup"use "strfind"use "utf" pkg std =	const netaddr	: (addr : byte[:], net : byte[:], port : byte[:] -> byte[:]);; const netaddr = {addr, net, port	match strfind(addr, "!")	| `Some idx:		match strfind(addr[idx+1:], "!")		| `Some _:	-> sldup(addr)		| `None:	/* fall through */		;;		if port.len > 0			-> fmt("{}!{}", addr, port)		elif net.len > 0			-> fmt("{}!{}", net, addr)		else			-> sldup(addr)		;;	| `None:		match (net.len, port.len)		| (0, 0):	-> sldup(addr)		| (0, _):	-> fmt("net!{}!{}", addr, port)		| (_, 0):	-> fmt("{}!{}", net, addr)		| (_, _):	-> fmt("{}!{}!{}", net, addr, port)		;;	;;}