5 Jul
2006
5 Jul
'06
4:27 p.m.
On Wed, 05 Jul 2006 22:35:47 +0800, Joel de Guzman <joel@boost-consulting.com> wrote:
Gennaro Prota wrote:
[...] But it might be not: the question of what the result of to_upper(to_lower(to_upper(rng))) is supposed to be is not trivial at all.
The result will be a view. Then, if it's done correctly, ideally, the view transformations can collapse the view.
Yes, I know. What I was hinting at is that not all languages have "uppercase" and/or "lowercase". And in those that have there's no guarantee of one-to-one mapping, so that to_lower or to_upper aren't in general invertible functions, or even left-invertible functions. -- [ Gennaro Prota, C++ developer for hire ] [ resume: available on request ]