derive(EnumDiscriminants) expansion warns on deprecated variants

[alexkirsz]

The following code:

#[derive(Debug, Clone, EnumDiscriminants)]
pub enum MyEnum {
  #[deprecated]
  VariantA,
  VariantB,
}

results in the following rustc error:

rustc: use of deprecated unit variant `MyEnum::VariantA`
`-D deprecated` implied by `-D warnings`
to override `-D warnings` add `#[allow(deprecated)]`

Which cannot be silenced, except by wrapping the whole expansion in a module that blanket-silences the warning:

mod silenced {
  #![expect(deprecated, reason = "EnumDiscriminants")]

  #[derive(Debug, Clone, EnumDiscriminants)]
  pub enum MyEnum {
    #[deprecated]
    VariantA,
    VariantB,
  }
}

pub use silenced::{MyEnum, MyEnumDiscriminants};