oneOf package:parsers

oneOf cs succeeds if the current character is in the supplied list of characters cs. Returns the parsed character. See also satisfy.
vowel  = oneOf "aeiou"
oneOfSet cs succeeds if the current character is in the supplied set of characters cs. Returns the parsed character. See also satisfy.
vowel  = oneOf "aeiou"
As the dual of oneOf, noneOf cs succeeds if the current character is not in the supplied list of characters cs. Returns the parsed character.
consonant = noneOf "aeiou"
As the dual of oneOf, noneOf cs succeeds if the current character is not in the supplied list of characters cs. Returns the parsed character.
consonant = noneOf "aeiou"