I'm soliciting ideas from people who know the Scala compiler better than I do! How might I get nsc to invoke some custom code at some point (not too important when) after typer has run, but before compilation finishes? Are there any hooks available to me?
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A Scala compiler plugin can hook in after any of these stages: https://typelevel.org/scala/docs/phases.html … The API is a bit gnarly and almost certainly will need huge changes to work with Scala 3. But it's there and you can do pretty much anything you want
I'm keen to avoid a compiler plugin if possible, though it would be a valid way to do this. To elaborate on the problem, I have an unknown number of macro expansions happening during typer, and I want to print a report (once only) when all of them have run.
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Hmm. Been thinking on this, and here's what I'd do: have some sort of global state that's cleared/initialized by a plugin that runs before macro expansion; macros report to that global state during expansion; plugin runs following expansion that triggers generation of the report
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That's not far off my plan, though we can just keep the state in some global singleton object, and it doesn't need to be init'd... we can assume it gets cleaned up by the post-typer code that runs once for every compilation. (My use-case can assume compiles are successful).
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