Writing macro_rules macros by hand really does give me the "programming is writing weird gibberish"-feel.
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We'd like to have http://crates.io distribute proc macros as precompiled wasm binaries that are executed by a wasm runtime in the compiler. Then adding a dependency on a proc macro no longer adds anything to compile time.
I hadn't heard about that, but it sounds awesome
Interesting. You still have to compile the wasm, so it's not "nothing" ;) Why wasm over MIR or a cranelift based rustc?
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Wild guess: wasm is stable, MIR is *very* unstable
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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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