* Andrey Chudnov <achud...@gmail.com> [2013-05-28 16:36:14-0400] > * Does any generic traversal/transformation (uniplate-style) library > support GADTs?
Any syb-style library works with GADTs, by the virtue of dealing with value representations instead of type representations. > * What is the best choice, performance- and memory-wise, for a parser > combinator library with support for arbitrary look-ahead? Parsec is > considered slow by some [1], but is it only in comparison with > attoparsec (which, unfortunately, doesn't support arbitrary > look-ahead)? Is there any parser library that performs better than > Parsec while still supporting arbitrary look-ahead. Not sure what you mean here — attoparsec does support unlimited lookahead, in the sense that a parser may fail arbitrarily late in the input stream, and backtrack to any previous state. Although attoparsec is a poor choice for programming language parsing, primarily because of the error messages. Roman _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
