If you’re parsing Rust for any practical purpose, the complexity class of the grammar isn’t in the top 10 things that are difficult. It isn’t even in the top 100.
Rustfmt just uses libsyntax. I still completely fail to see why we should make the language harder to use so that a tiny minority of tool authors who can’t use libsyntax for whatever reason don’t have to write, like, 5 lines of code.
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a) it's not really harder to use... b) it's not a tiny minority of tool authors, or at least it shouldn't have to be
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Turbofish absolutely has atrocious usability.
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