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A comment on Mrustc: a Rust compiler written in C++. Parent comment

Re:Mrustc: a Rust compiler written in C++ by tmzt on Friday September 22, 2017 @03:31PM (#15315044)
Yes, but I mean outputing actual Rust source but with generators or async/await expanded into calls to Futures. Similar to how Go is now bootstrapped from a down-level compiler.
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Re:Mrustc: a Rust compiler written in C++ by steveklabnik on Friday September 22, 2017 @08:17PM (#15317174)
Yeah, I get it. But that's what I mean; MIR is the common sub-language that's the same across epochs.

I don't think there's any real plans for a source-based approach. But epochs can only change a limited amount of things for exactly this reason; they minimize the compiler burden of supporting them.

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