span package:utf8-string

span :: UTF8Bytes b s => (Char -> Bool) -> b -> (b, b)

Split a string into two parts: the first is the longest prefix that contains only characters that satisfy the predicate; the second part is the rest of the string. Invalid characters are passed as '\0xFFFD' to the predicate.

span :: (Char -> Bool) -> ByteString -> (ByteString, ByteString)

utf8-string Data.ByteString.Lazy.UTF8 Data.ByteString.UTF8

Split a string into two parts: the first is the longest prefix that contains only characters that satisfy the predicate; the second part is the rest of the string. Invalid characters are passed as '\0xFFFD' to the predicate.

span :: UTF8Bytes string index => (Char -> Bool) -> UTF8 string -> (UTF8 string, UTF8 string)

utf8-string Data.String.UTF8

Split a string into two parts: the first is the longest prefix that contains only characters that satisfy the predicate; the second part is the rest of the string. Invalid characters are passed as '\0xFFFD' to the predicate.