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Close # 27. Backtracking user state can be achieved via combination of ‘StateT’ monad transformer and ‘ParsecT’: StateT StateType (ParsecT s m a) This user state can be more flexible. This fact renders current built-in user state redundant. To help work with this new approach (combining monad transformers more freely) we introduce ‘MonadParsec’ MTL-style type class. All tools that come with Megaparsec library were modified to work smoothly with any instance of ‘MonadParsec’, not only ‘ParsecT’. |
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| .. | ||
| ByteString | ||
| Text | ||
| ByteString.hs | ||
| Char.hs | ||
| Combinator.hs | ||
| Error.hs | ||
| Expr.hs | ||
| Lexer.hs | ||
| Perm.hs | ||
| Pos.hs | ||
| Prim.hs | ||
| ShowToken.hs | ||
| String.hs | ||
| Text.hs | ||