pub fn uppercase(slice: &[u8], options: UppercaseMode) -> Uppercase<'_> ⓘExpand description
Returns an iterator that yields a copy of the bytes in the given slice with all lowercase letters replaced with their uppercase counterparts.
This function treats the given slice as a conventionally UTF-8 string. UTF-8 byte sequences are converted to their Unicode uppercase equivalents. Invalid UTF-8 byte sequences are yielded as is.
The case mapping mode is determined by the given UppercaseMode. See its
documentation for details on the available case mapping modes.
§Panics
Not all UppercaseModes are currently implemented. This function will
panic if the caller supplies Turkic uppercasing mode.