> Okay, so those are the problems. What’s the solution?
> If you need to perform a case mapping on a string, you can use LCMapStringEx with LCMAP_LOWERCASE or LCMAP_UPPERCASE, possibly with other flags like LCMAP_LINGUISTIC_CASING. If you use the International Components for Unicode (ICU) library, you can use u_strToUpper and u_strToLower.
The correct thing to do is to not do it at all. If text is 3rd-party supplied, treat it like an opaque byte sequence. Alternatively, pay a well-trained human to do it by hand.
All other options are going to result in edge cases where you're not handling it properly. It's like trying to programmatically split a full name into a first name and a last name: language doesn't work like that.
Thank you for this universal approach. I can now toggle capitalization on/off for any character, instead of just being limited to alphabetic ones!
Jokes aside, I was kinda hoping for a good answer that doesn't rely on a Windows API or an external library, but I'm not sure there is one. It's a rather complex problem when you account for more than just ASCII and the English language.
> If you need to perform a case mapping on a string, you can use LCMapStringEx with LCMAP_LOWERCASE or LCMAP_UPPERCASE, possibly with other flags like LCMAP_LINGUISTIC_CASING. If you use the International Components for Unicode (ICU) library, you can use u_strToUpper and u_strToLower.