Contains types that encapsulate uncased ASCII strings.
An 'uncased' ASCII string is case-preserving. That is, the string itself contains cased characters, but comparison (including ordering, equality, and hashing) is case-insensitive.
An uncased (case-preserving), owned or borrowed ASCII string.
A reference to an uncased (case-preserving) ASCII string. This is typically
created from an
Returns true if