State of the Haskell ecosystem

Re:State of the Haskell ecosystem by Gabriel439 on Monday August 17, 2015 @07:23PM (#10076748)

`trifecta` is basically produces `clang`-style error messages (i.e. they have the pretty colors, underlined text spans, cursor pointers into the text, and really good error messages indicating the real problem and not some unrelated problem). That's why most people recommend `trifecta` when error reporting quality is paramount.

The author of the `trifecta` library is extremely knowledgeable about parsing/backtracking/recovery/error-reporting and has put a lot of thought into how to improve error message relevance as much as possible.

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Re:State of the Haskell ecosystem by sklogic on Wednesday August 19, 2015 @04:38AM (#10084295)

Ok, I think I understand now how it works (played with Idris parser a bit). Sort of a simple trick, I'll borrow it for the lower tier combinator-based parsing layer.

I was even more interested in handcrafted, custom error messages rather than constructed. Still cannot figure out how to stuff custom recovery heuristics into a combinator-based code.

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