Parsing layout – problems with Haskell's syntax (2021)

Way more interesting than I expected.

One of the things I learned was that even though I would have described myself as comfortable writing Haskell code... I sure never learned all of the fundamentals of how it is parsed.

All of the details are in the article - all of them - so there's a lot I didn't read. If I were implementing a parser, I read this carefully.

The most interesting part was the explanation that parsing this statement:

     foo = let x = 1 in x

involves realizing that one interpretation leads to a parse error, so an extra closing brace } should be emitted at the end.

Updated URL: https://amelia.how/posts/parsing-layout.html

It is not loading for me either, but there is a copy at the Internet Archive:

https://web.archive.org/web/20211015184656/https://abby.how/...

DNS, y u no resolve?