57 lines
1.7 KiB
Rust
57 lines
1.7 KiB
Rust
//! 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;
|
|
use std::sync::LazyLock;
|
|
|
|
use rustc_data_structures::fx::FxHashMap;
|
|
|
|
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())
|
|
}
|
|
}
|
|
|
|
rustc_error_messages::into_diag_arg_using_display!(ErrCode);
|
|
|
|
macro_rules! define_error_code_constants_and_diagnostics_table {
|
|
($($num:literal,)*) => (
|
|
$(
|
|
pub const ${concat(E, $num)}: $crate::ErrCode = $crate::ErrCode::from_u32($num);
|
|
)*
|
|
static DIAGNOSTICS: LazyLock<FxHashMap<ErrCode, &'static str>> = LazyLock::new(|| {
|
|
[
|
|
$( (
|
|
${concat(E, $num)},
|
|
include_str!(
|
|
concat!("../../rustc_error_codes/src/error_codes/E", stringify!($num), ".md")
|
|
)
|
|
), )*
|
|
]
|
|
.iter()
|
|
.copied()
|
|
.collect()
|
|
});
|
|
)
|
|
}
|
|
|
|
rustc_error_codes::error_codes!(define_error_code_constants_and_diagnostics_table);
|
|
|
|
#[derive(Debug)]
|
|
pub struct InvalidErrorCode;
|
|
|
|
/// Returns `InvalidErrorCode` if the code requested does not exist.
|
|
pub fn try_find_description(code: ErrCode) -> Result<&'static str, InvalidErrorCode> {
|
|
DIAGNOSTICS.get(&code).copied().ok_or(InvalidErrorCode)
|
|
}
|