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Generate FormatRule definitions (#4724)

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* Generate FormatRule definitions

* Generate verbatim output

* pub(crate) everything

* clippy fix

* Update crates/ruff_python_formatter/src/lib.rs

Co-authored-by: Micha Reiser <micha@reiser.io>

* Update crates/ruff_python_formatter/src/lib.rs

Co-authored-by: Micha Reiser <micha@reiser.io>

* stub out with Ok(()) again

* Update crates/ruff_python_formatter/src/lib.rs

Co-authored-by: Micha Reiser <micha@reiser.io>

* PyFormatContext::{contents, locator} with `#[allow(unused)]`

* Can't leak private type

* remove commented code

* Fix ruff errors

* pub struct Format{node} due to rust rules

---------

Co-authored-by: Julian LaNeve <lanevejulian@gmail.com>
Co-authored-by: Micha Reiser <micha@reiser.io>
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konstin 2023-06-01 08:38:53 +02:00 • committed by GitHub
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# Rust Python Formatter
For the formatter, we would like to implement `Format` from the rust_formatter crate for all AST
nodes, defined in the rustpython_parser crate. This violates rust's orphan rules. We therefore
generate in `generate.py` a newtype for each AST node with implementations of `FormatNodeRule`,
`FormatRule`, `AsFormat` and `IntoFormat` on it.
![excalidraw showing the relationships between the different types](orphan_rules_in_the_formatter.svg)