Hi, are user-defined compiler plugins currently supported on the nightly build of rustc? This issue Tracking issue for plugin stabilization (`plugin`, `plugin_registrar` features) · Issue #29597 · rust-lang/rust · GitHub gives me the impression that they are no longer supported.

Is there an alternative solution for writing code that interacts with the compiler? I would say that proc macros are close, but they cannot interact with the compiler without modifying existing source code. I am looking for a way to plug into the compiler and inject changes at compile time.

Thanks.

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