Dev log: implementing new syntax in GHC

One Haskell developer just wrapped an eighteen-month journey to add new syntax to GHC — the Glasgow Haskell Compiler. According to LessWrong, the work involved wrestling with parser complexity, learning undocumented compiler terminology, and patiently waiting for code review. The author documented the entire process: the dead ends, the conflicting specs, and how open-source compiler development actually works. The feature shipped in April and is now live.

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