| //! This module defines the following. |
| //! - The `ErrCode` type. |
| //! - A constant for every error code, with a name like `E0123`. |
| //! - A static table `DIAGNOSTICS` pairing every error code constant with its |
| //! long description text. |
| |
| use std::fmt; |
| |
| rustc_index::newtype_index! { |
| #[max = 9999] // Because all error codes have four digits. |
| #[orderable] |
| #[encodable] |
| #[debug_format = "ErrCode({})"] |
| pub struct ErrCode {} |
| } |
| |
| impl fmt::Display for ErrCode { |
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { |
| write!(f, "E{:04}", self.as_u32()) |
| } |
| } |
| |
| macro_rules! define_error_code_constants_and_diagnostics_table { |
| ($($name:ident: $num:literal,)*) => ( |
| $( |
| pub const $name: $crate::ErrCode = $crate::ErrCode::from_u32($num); |
| )* |
| pub static DIAGNOSTICS: &[($crate::ErrCode, &str)] = &[ |
| $( ( |
| $name, |
| include_str!( |
| concat!("../../rustc_error_codes/src/error_codes/", stringify!($name), ".md") |
| ) |
| ), )* |
| ]; |
| ) |
| } |
| |
| rustc_error_codes::error_codes!(define_error_code_constants_and_diagnostics_table); |