Allow non_snake_case for individual fields

Is it possible to put #[allow(non_snake_case)] on individual fields?

pub struct Foo {
    pub x____y____z: u8,

Despite the #[allow], this still generates a warning:

warning: structure field `x____y____z` should have a snake case name
 --> src/
3 |     pub x____y____z: u8,
  |         ^^^^^^^^^^^ help: convert the identifier to snake case: `x_y_z`
  = note: `#[warn(non_snake_case)]` on by default


My use case is that I have a macro that adds hidden bookkeeping fields to a struct. Sometimes the fields have multiple underscores in a row. I'd like to be able to disable the snake-case check for the hidden fields but not do it for the struct as a whole.

I believe this is the issue (despite the title).

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