rust/compiler/rustc_privacy/src/errors.rs

use rustc_macros::{SessionDiagnostic, SessionSubdiagnostic};
use rustc_span::{Span, Symbol};

#[derive(SessionDiagnostic)]
#[error(privacy::field_is_private, code = "E0451")]
pub struct FieldIsPrivate {
    #[primary_span]
    pub span: Span,
    pub field_name: Symbol,
    pub variant_descr: &'static str,
    pub def_path_str: String,
    #[subdiagnostic]
    pub label: FieldIsPrivateLabel,
}

#[derive(SessionSubdiagnostic)]
pub enum FieldIsPrivateLabel {
    #[label(privacy::field_is_private_is_update_syntax_label)]
    IsUpdateSyntax {
        #[primary_span]
        span: Span,
        field_name: Symbol,
    },
    #[label(privacy::field_is_private_label)]
    Other {
        #[primary_span]
        span: Span,
    },
}

#[derive(SessionDiagnostic)]
#[error(privacy::item_is_private)]
pub struct ItemIsPrivate<'a> {
    #[primary_span]
    #[label]
    pub span: Span,
    pub kind: &'a str,
    pub descr: String,
}