starlark-rust (used by Buck2) supports this! They're immensely useful for grokking complex build code, as you said. https://github.com/facebook/starlark-rust/bl

starlark-rust (used by Buck2) supports this! They're immensely useful for grokking complex build code, as you said. https://github.com/facebook/starlark-rust/blob/main/docs/types.md https://github.com/facebook/starlark-rust/blob/main/docs/typ...