isUpper -package:text-latin1

Selects upper-case or title-case alphabetic Unicode characters (letters). Title case is used by a small number of letter ligatures like the single-character form of Lj. Note: this predicate does not work for letter-like characters such as: 'Ⓐ' (U+24B6 circled Latin capital letter A) and 'Ⅳ' (U+2163 Roman numeral four). This is due to selecting only characters with the GeneralCategory UppercaseLetter or TitlecaseLetter. See isUpperCase for a more intuitive predicate. Note that unlike isUpperCase, isUpper does select title-case characters such as 'Dž' (U+01C5 Latin capital letter d with small letter z with caron) or 'ᾯ' (U+1FAF Greek capital letter omega with dasia and perispomeni and prosgegrammeni).

Selects upper-case or title-case alphabetic Unicode characters (letters). Title case is used by a small number of letter ligatures like the single-character form of Lj.

Selects upper-case or title-case alphabetic Unicode characters (letters). Title case is used by a small number of letter ligatures like the single-character form of Lj. It matches characters with general category UppercaseLetter and TitlecaseLetter. See: isUpperCase for the full upper case predicate.

isUpper c == Data.Char.isUpper c

Selects upper-case Unicode letter-like characters. Note: this predicate selects characters with the Unicode property Uppercase, which include letter-like characters such as: 'Ⓐ' (U+24B6 circled Latin capital letter A) and 'Ⅳ' (U+2163 Roman numeral four). See isUpper for the legacy predicate. Note that unlike isUpperCase, isUpper does select title-case characters such as 'Dž' (U+01C5 Latin capital letter d with small letter z with caron) or 'ᾯ' (U+1FAF Greek capital letter omega with dasia and perispomeni and prosgegrammeni).

Is this an upper-case character? Only works for the Latin1 subset, otherwise returns sFalse.

>>> prove $ \c -> sNot (isLowerL1 c .&& isUpperL1 c)
Q.E.D.

Returns True for upper-case characters. It uses the character property Uppercase. Note: it does not match title-cased letters. Those are matched using: generalCategory c == TitlecaseLetter. See: isUpper for the legacy predicate.

Returns True if the given key value is in upper case.

Determines if a character is uppercase.

Returns True if the given key value is in upper case.