Writing macro_rules macros by hand really does give me the "programming is writing weird gibberish"-feel.
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Wild guess: wasm is stable, MIR is *very* unstable
I hadn't heard about that, but it sounds awesome
That's my guess too, but this is executed in the compiler so there's some flexibility -- and there's been talk of MIR only crates for a while now so the idea of making it forwards compatible seems like it's in the realm of possibility anyway
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My impression is MIR codegen to machine code takes much longer than wasm to machine code, or alternatively interpreted MIR has a 10x or worse performance overhead than wasm. Determinism and isolation are additional advantages over MIR:https://internals.rust-lang.org/t/pre-rfc-procmacros-implemented-in-wasm/10860 …
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Makes sense. Avoiding LLVM here is a huge win I suspect. Thanks for the context.
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