Data.String.Unicode

toUpper :: String -> String

Convert each code point in the string to its corresponding uppercase sequence. This is the full (locale-independent) Unicode algorithm, and may map single code points to more than one code point. For example, toUpper "ß" == "SS".

Because this matches on more rules, it may be slower than toUpperSimple, but it provides more correct results.

toLower :: String -> String

Convert each code point in the string to its corresponding lower sequence. This is the full (locale-independent) Unicode algorithm, and may map single code points to more than one code point. For example, toLower "\x0130" == "\x0069\x0307".

Because this matches on more rules, it may be slower than toLowerSimple, but it provides more correct results.

caseFold :: String -> String

The full Unicode case folding algorithm, may increase the length of the string by mapping individual code points to longer sequences.

caselessMatch :: String -> String -> Boolean

Caseless matching, based on caseFold.

toUpperSimple :: String -> String

Convert each code point in the string to its corresponding uppercase code point. This will preserve the number of code points in the string.

Note: this is not the full Unicode algorithm, see toUpper.

toLowerSimple :: String -> String

Convert each code point in the string to its corresponding lowercase code point. This will preserve the number of code points in the string.

Note: this is not the full Unicode algorithm, see toLower.

caseFoldSimple :: String -> String

Convert each code point in the string to its corresponding case-folded code point. This will preserve the number of code points in the string.

Note: this is not the full Unicode algorithm, see caseFold.