On Wednesday, 18 June 2014 at 17:56:46 UTC, Mattcoder wrote:
On Wednesday, 18 June 2014 at 15:42:04 UTC, Etienne wrote:
it would be a little more practical to be able to write
writeln(obj.member?.nested?.val);
If one of these: member, nested or val == null, what will
happen with writeln()? It will print null or it will be avoided?
The expression needs to have exactly one type, and because all of
the components can be non-null, it needs to be the type of the
last component, in this case `val`. This means that if the one of
the components is null, the entire expression needs to return a
value of this type, presumably the `.init` value.
The alternative is to raise an exception (or error), but that
would defeat the purpose (almost, as it would be slightly better
than segfaulting).
