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> There are restrictions. I'll update the README to make note of them. Basically, exec and eval don't work. Since we don't use those in production code at Google, this seemed acceptable.

I'm guessing pretty much the entire AST module is a no-go?

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I think the CPython AST module is written as a C extension module so currently it's a no-go. I don't think there's a fundamental reason Grumpy couldn't run a pure Python AST module, though.

The ast module itself is in Python, but it imports the _ast module which is an extension module. This actually isn't that big of a deal, though, as the entire AST is defined in a DSL (see https://cpython-devguide.readthedocs.io/en/latest/compiler.h... for some details), so you just have to write some code to generate _ast in Python instead of C (which PyPy may have already done).

So I take that means Grumpy can't run itself?

Correct, Grumpy cannot yet run Grumpy :)

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