toupper package:rio

toUpper :: Char -> Char
rio RIO.Char
Convert a letter to the corresponding upper-case letter, if any. Any other character is returned unchanged.
toUpper :: Text -> Text
rio RIO.Text
O(n) Convert a string to upper case, using simple case conversion. Subject to fusion. The result string may be longer than the input string. For instance, the German "ß" (eszett, U+00DF) maps to the two-letter sequence "SS".
toUpper :: Text -> Text
rio RIO.Text.Lazy
O(n) Convert a string to upper case, using simple case conversion. Subject to fusion. The result string may be longer than the input string. For instance, the German eszett (U+00DF) maps to the two-letter sequence SS.