Trait DataFramePayloadFields 

#[doc(hidden)]
pub trait DataFramePayloadFields {
    const FIELDS: &'static [&'static str];
    const TAG: &'static str;
}

Reflection trait for #[derive(DataFrameRow)] types, used for compile-time collision detection in outer DataFrameRow enums.

Automatically emitted by the DataFrameRow derive macro alongside DataFrameRow. The outer enum’s codegen generates a const _: () assertion that calls assert_no_payload_field_collision using these associated constants, producing a clear compile error when an inner payload field name (after outer prefix expansion) would produce the same R column as the outer discriminant column.

Constants

• FIELDS: the resolved column names (after #[dataframe(rename = "...")]) that this type contributes directly. For structs: each column name. For enums: every payload field name across all variants (deduplicated).
• TAG: the value of #[dataframe(tag = "...")] on this type, or "" if absent. The outer macro uses this as the discriminant suffix for inner-enum nested fields.

You should not implement this trait manually.

Required Associated Constants

const FIELDS: &'static [&'static str]

Resolved column names contributed by this type (post-rename, pre-prefix).

const TAG: &'static str

Value of #[dataframe(tag = "...")] on this type, or "" if absent.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors