patch applied (packages/polyparse): Combinator `apply` is now promoted to a class method.

[Malcolm Wallace]

Wed Sep  5 02:31:51 PDT 2007  Malcolm.Wallace at cs.york.ac.uk
  * Combinator `apply` is now promoted to a class method.
  Apply is basic, because its implementation depends on whether the
  underlying parser type is supposed to be lazy or strict.  Many of the
  higher-level combinators in T.P.P.Base are now expressed in terms of
  `apply`, which removes code duplication in the T.P.P.Lazy module.  In
  exchange, `failBad` moves out of the class, because it is always just
  (commit . fail).

    M ./src/Text/ParserCombinators/Poly/Base.hs -29 +32
    M ./src/Text/ParserCombinators/Poly/ByteString.hs -1
    M ./src/Text/ParserCombinators/Poly/Lazy.hs -86 +13
    M ./src/Text/ParserCombinators/Poly/Plain.hs -1
    M ./src/Text/ParserCombinators/Poly/State.hs -1
    M ./src/Text/ParserCombinators/Poly/StateLazy.hs -2 +8
    M ./src/Text/ParserCombinators/Poly/Stream.hs -1