eof package:Cabal-syntax

This parser only succeeds at the end of the input. This is not a primitive parser but it is defined using notFollowedBy.

eof  = notFollowedBy anyChar <?> "end of input"

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"

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"

asTypeOf is a type-restricted version of const. It is usually used as an infix operator, and its typing forces its first argument (which is usually overloaded) to have the same type as the second.