> I'd even argue any "is.*" function is probably too late to add to the spec at this point in time. I'd like to see isualpha() isudigit() isupunct() isuspace()

> I'd even argue any "is.*" function is probably too late to add to the spec at this point in time. I'd like to see isualpha() isudigit() isupunct() isuspace() isugraph() etc. plus isucombining(). They'd supplement iswxxx() but (a) taking a `signed unicode int` (for C2x defined as at least 32 bits wide) and (b) being locale-independent.