Re: [RFC PATCH v2 3/5] rust: add PL011 device model

[Zhao Liu]

Hi Manos and all,

On Tue, Jun 11, 2024 at 01:33:32PM +0300, Manos Pitsidianakis wrote:
> diff --git a/rust/rustfmt.toml b/rust/rustfmt.toml
> new file mode 100644
> index 0000000000..ebecb99fe0
> --- /dev/null
> +++ b/rust/rustfmt.toml
> @@ -0,0 +1,7 @@
> +edition = "2021"
> +format_generated_files = false
> +format_code_in_doc_comments = true
> +format_strings = true
> +imports_granularity = "Crate"
> +group_imports = "StdExternalCrate"
> +wrap_comments = true
>

I find it's stiil necessary to strictly limit the width of the lines by
"error_on_line_overflow = true" [1].

Currently rustfmt defaults the width limitation with "max_width = 100",
but it has bugs and doesn't always work. For example, the line of
rust/qemu-api/src/device_class.rs:108 comes to 157 characters and is
ignored by rustfmt, which doesn't even fit in one line of my screen!

Of course I think it's feasible to manually review and fix similar cases,
but it's definitely better to have readily available tool that can help
us rigorously formatted...

[1]: 
https://github.com/rust-lang/rustfmt/blob/master/Configurations.md#error_on_line_overflow

-Zhao