On Tuesday, 14 March 2023 at 18:41:50 UTC, Paul Backus wrote:
On Tuesday, 14 March 2023 at 08:21:00 UTC, amarillion wrote:
I'm trying to understand why this doesn't work. I don't really
understand the error. If I interpret this correctly, it's
missing a length attribute on a string, but shouldn't length
be there?
By default, D's standard library treats a `string` as a range
of Unicode code points (i.e., a range of `dchar`s), encoded in
UTF-8. Because UTF-8 is a variable-length encoding, it's
impossible to know how many code points there are in a `string`
without iterating it--which means that, as far as the standard
library is concerned, `string` does not have a valid `.length`
property.
Thanks for the clear explanation! I was already aware that you
could iterate by codepoint with foreach(dchar c; s), but it just
didn't cross my mind that the same concept was playing a role
here. I guess it's just one of those things that you just have to
know.
regards,
Amarillion
