On Thursday, 23 May 2013 at 14:42:27 UTC, Dicebot wrote:
something I may have actually used in real code writing a
low-level networking library:
struct Packet
{
immutable etherType = 0x0800; // IPv4 by default;
// ...
this(bool IPv6)
{
if (!IPv6)
return; // fine with default, same as Packet.init
else
{
etherType = 0x86DD;
// ...
}
}
}
void main()
{
auto buffer = cast(ubyte[])(Packet(true));
}
That's better, but it's still not a convincing example.
I don't see why you cannot remove the intializer, and write:
this(bool IPv6)
{
if (!IPv6)
etherType = 0x0800;
else
etherType = 0x86DD;
...
}
That only leaves the case where you are bypassing the constructor.
If you have a constructor, but have just used Packet.init, the
object is not constructed properly. I cannot see the value in
having etherType initialized and everything else not.
