Index - U
| Underscore | ASCII.Char |
| unicodeStringToByteListMaybe | ASCII |
| unicodeStringToByteStringMaybe | ASCII |
| unicodeStringToCharListMaybe | ASCII |
| unicodeStringToCharListUnsafe | ASCII |
| unicodeToCharMaybe | ASCII |
| unicodeToCharUnsafe | ASCII |
| UnitSeparator | ASCII.Char |
| unsafeFromBuilder | Data.Ascii, Data.Ascii.Blaze |
| unsafeFromByteString | Data.Ascii, Data.Ascii.ByteString |
| unsafeFromDigit | Data.Ascii, Data.Ascii.Word8 |
| unsafeFromHexDigit | Data.Ascii, Data.Ascii.Word8 |
| unsafeFromLowHexDigit | Data.Ascii, Data.Ascii.Word8 |
| unsafeFromOctDigit | Data.Ascii, Data.Ascii.Word8 |
| unsafeFromString | Data.Ascii, Data.Ascii.ByteString |
| unsafeFromText | Data.Ascii, Data.Ascii.ByteString |
| unsafeFromUpHexDigit | Data.Ascii, Data.Ascii.Word8 |
| UpperCase | ASCII, ASCII.Case |