diff --git a/Cargo.lock b/Cargo.lock
index a226a10f89d4f..9e5deedb66fff 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1445,6 +1445,7 @@ name = "error_index_generator"
version = "0.0.0"
dependencies = [
"mdbook",
+ "rustc_error_codes",
]
[[package]]
diff --git a/compiler/rustc_driver_impl/src/lib.rs b/compiler/rustc_driver_impl/src/lib.rs
index 54bcb154da28f..464ddae476a5e 100644
--- a/compiler/rustc_driver_impl/src/lib.rs
+++ b/compiler/rustc_driver_impl/src/lib.rs
@@ -485,7 +485,7 @@ fn handle_explain(registry: Registry, code: &str, output: ErrorOutputType) {
let normalised =
if upper_cased_code.starts_with('E') { upper_cased_code } else { format!("E{code:0>4}") };
match registry.try_find_description(&normalised) {
- Ok(Some(description)) => {
+ Ok(description) => {
let mut is_in_code_block = false;
let mut text = String::new();
// Slice off the leading newline and print.
@@ -509,9 +509,6 @@ fn handle_explain(registry: Registry, code: &str, output: ErrorOutputType) {
print!("{text}");
}
}
- Ok(None) => {
- early_error(output, &format!("no extended information for {code}"));
- }
Err(InvalidErrorCode) => {
early_error(output, &format!("{code} is not a valid error code"));
}
diff --git a/compiler/rustc_error_codes/src/error_codes.rs b/compiler/rustc_error_codes/src/error_codes.rs
index 97201219cdf68..df857be85adab 100644
--- a/compiler/rustc_error_codes/src/error_codes.rs
+++ b/compiler/rustc_error_codes/src/error_codes.rs
@@ -513,7 +513,9 @@ E0790: include_str!("./error_codes/E0790.md"),
E0791: include_str!("./error_codes/E0791.md"),
E0792: include_str!("./error_codes/E0792.md"),
E0793: include_str!("./error_codes/E0793.md"),
-;
+}
+
+// Undocumented removed error codes. Note that many removed error codes are documented.
// E0006, // merged with E0005
// E0008, // cannot bind by-move into a pattern guard
// E0019, // merged into E0015
@@ -570,7 +572,7 @@ E0793: include_str!("./error_codes/E0793.md"),
// E0246, // invalid recursive type
// E0247,
// E0248, // value used as a type, now reported earlier during resolution
- // as E0412
+// // as E0412
// E0249,
// E0257,
// E0258,
@@ -631,14 +633,14 @@ E0793: include_str!("./error_codes/E0793.md"),
// E0558, // replaced with a generic attribute input check
// E0563, // cannot determine a type for this `impl Trait` removed in 6383de15
// E0564, // only named lifetimes are allowed in `impl Trait`,
- // but `{}` was found in the type `{}`
+// // but `{}` was found in the type `{}`
// E0598, // lifetime of {} is too short to guarantee its contents can be...
// E0611, // merged into E0616
// E0612, // merged into E0609
// E0613, // Removed (merged with E0609)
// E0629, // missing 'feature' (rustc_const_unstable)
// E0630, // rustc_const_unstable attribute must be paired with stable/unstable
- // attribute
+// // attribute
// E0645, // trait aliases not finished
// E0694, // an unknown tool name found in scoped attributes
// E0702, // replaced with a generic attribute input check
@@ -647,4 +649,3 @@ E0793: include_str!("./error_codes/E0793.md"),
// E0721, // `await` keyword
// E0723, // unstable feature in `const` context
// E0738, // Removed; errored on `#[track_caller] fn`s in `extern "Rust" { ... }`.
-}
diff --git a/compiler/rustc_error_codes/src/lib.rs b/compiler/rustc_error_codes/src/lib.rs
index bd424dd9d0685..d6b120e4dfcf2 100644
--- a/compiler/rustc_error_codes/src/lib.rs
+++ b/compiler/rustc_error_codes/src/lib.rs
@@ -5,10 +5,9 @@
//! the goal being to make their maintenance easier.
macro_rules! register_diagnostics {
- ($($ecode:ident: $message:expr,)* ; $($code:ident,)*) => (
- pub static DIAGNOSTICS: &[(&str, Option<&str>)] = &[
- $( (stringify!($ecode), Some($message)), )*
- $( (stringify!($code), None), )*
+ ($($ecode:ident: $message:expr,)*) => (
+ pub static DIAGNOSTICS: &[(&str, &str)] = &[
+ $( (stringify!($ecode), $message), )*
];
)
}
diff --git a/compiler/rustc_errors/src/json.rs b/compiler/rustc_errors/src/json.rs
index e475fc725c33b..f32d6b96b9b24 100644
--- a/compiler/rustc_errors/src/json.rs
+++ b/compiler/rustc_errors/src/json.rs
@@ -580,7 +580,7 @@ impl DiagnosticCode {
let je_result =
je.registry.as_ref().map(|registry| registry.try_find_description(&s)).unwrap();
- DiagnosticCode { code: s, explanation: je_result.unwrap_or(None) }
+ DiagnosticCode { code: s, explanation: je_result.ok() }
})
}
}
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
index edec8cce92f97..c71668657f7fd 100644
--- a/compiler/rustc_errors/src/lib.rs
+++ b/compiler/rustc_errors/src/lib.rs
@@ -1477,9 +1477,7 @@ impl HandlerInner {
.emitted_diagnostic_codes
.iter()
.filter_map(|x| match &x {
- DiagnosticId::Error(s)
- if registry.try_find_description(s).map_or(false, |o| o.is_some()) =>
- {
+ DiagnosticId::Error(s) if registry.try_find_description(s).is_ok() => {
Some(s.clone())
}
_ => None,
diff --git a/compiler/rustc_errors/src/registry.rs b/compiler/rustc_errors/src/registry.rs
index da764d993bbdb..f26d8e7ebdc34 100644
--- a/compiler/rustc_errors/src/registry.rs
+++ b/compiler/rustc_errors/src/registry.rs
@@ -5,21 +5,17 @@ pub struct InvalidErrorCode;
#[derive(Clone)]
pub struct Registry {
- long_descriptions: FxHashMap<&'static str, Option<&'static str>>,
+ long_descriptions: FxHashMap<&'static str, &'static str>,
}
impl Registry {
- pub fn new(long_descriptions: &[(&'static str, Option<&'static str>)]) -> Registry {
+ pub fn new(long_descriptions: &[(&'static str, &'static str)]) -> Registry {
Registry { long_descriptions: long_descriptions.iter().copied().collect() }
}
/// Returns `InvalidErrorCode` if the code requested does not exist in the
- /// registry. Otherwise, returns an `Option` where `None` means the error
- /// code is valid but has no extended information.
- pub fn try_find_description(
- &self,
- code: &str,
- ) -> Result<Option<&'static str>, InvalidErrorCode> {
+ /// registry.
+ pub fn try_find_description(&self, code: &str) -> Result<&'static str, InvalidErrorCode> {
self.long_descriptions.get(code).copied().ok_or(InvalidErrorCode)
}
}
diff --git a/src/tools/error_index_generator/Cargo.toml b/src/tools/error_index_generator/Cargo.toml
index f4dac6e947e32..76c2e330b2100 100644
--- a/src/tools/error_index_generator/Cargo.toml
+++ b/src/tools/error_index_generator/Cargo.toml
@@ -5,6 +5,7 @@ edition = "2021"
[dependencies]
mdbook = { version = "0.4", default-features = false, features = ["search"] }
+rustc_error_codes = { version = "0.0.0", path = "../../../compiler/rustc_error_codes" }
[[bin]]
name = "error_index_generator"
diff --git a/src/tools/error_index_generator/main.rs b/src/tools/error_index_generator/main.rs
index 373196b664281..f984275b164cc 100644
--- a/src/tools/error_index_generator/main.rs
+++ b/src/tools/error_index_generator/main.rs
@@ -2,9 +2,6 @@
extern crate rustc_driver;
-// We use the function we generate from `register_diagnostics!`.
-use crate::error_codes::error_codes;
-
use std::env;
use std::error::Error;
use std::fs::{self, File};
@@ -17,22 +14,6 @@ use std::str::FromStr;
use mdbook::book::{parse_summary, BookItem, Chapter};
use mdbook::{Config, MDBook};
-macro_rules! register_diagnostics {
- ($($error_code:ident: $message:expr,)+ ; $($undocumented:ident,)* ) => {
- pub fn error_codes() -> Vec<(&'static str, Option<&'static str>)> {
- let mut errors: Vec<(&str, Option<&str>)> = vec![
- $((stringify!($error_code), Some($message)),)+
- $((stringify!($undocumented), None),)*
- ];
- errors.sort();
- errors
- }
- }
-}
-
-#[path = "../../../compiler/rustc_error_codes/src/error_codes.rs"]
-mod error_codes;
-
enum OutputFormat {
HTML,
Markdown,
@@ -55,11 +36,8 @@ fn render_markdown(output_path: &Path) -> Result<(), Box<dyn Error>> {
write!(output_file, "# Rust Compiler Error Index\n")?;
- for (err_code, description) in error_codes().iter() {
- match description {
- Some(ref desc) => write!(output_file, "## {}\n{}\n", err_code, desc)?,
- None => {}
- }
+ for (err_code, description) in rustc_error_codes::DIAGNOSTICS.iter() {
+ write!(output_file, "## {}\n{}\n", err_code, description)?
}
Ok(())
@@ -105,27 +83,23 @@ This page lists all the error codes emitted by the Rust compiler.
"
);
- let err_codes = error_codes();
+ let err_codes = rustc_error_codes::DIAGNOSTICS;
let mut chapters = Vec::with_capacity(err_codes.len());
for (err_code, explanation) in err_codes.iter() {
- if let Some(explanation) = explanation {
- introduction.push_str(&format!(" * [{0}](./{0}.html)\n", err_code));
-
- let content = add_rust_attribute_on_codeblock(explanation);
- chapters.push(BookItem::Chapter(Chapter {
- name: err_code.to_string(),
- content: format!("# Error code {}\n\n{}\n", err_code, content),
- number: None,
- sub_items: Vec::new(),
- // We generate it into the `error_codes` folder.
- path: Some(PathBuf::from(&format!("{}.html", err_code))),
- source_path: None,
- parent_names: Vec::new(),
- }));
- } else {
- introduction.push_str(&format!(" * {}\n", err_code));
- }
+ introduction.push_str(&format!(" * [{0}](./{0}.html)\n", err_code));
+
+ let content = add_rust_attribute_on_codeblock(explanation);
+ chapters.push(BookItem::Chapter(Chapter {
+ name: err_code.to_string(),
+ content: format!("# Error code {}\n\n{}\n", err_code, content),
+ number: None,
+ sub_items: Vec::new(),
+ // We generate it into the `error_codes` folder.
+ path: Some(PathBuf::from(&format!("{}.html", err_code))),
+ source_path: None,
+ parent_names: Vec::new(),
+ }));
}
let mut config = Config::from_str(include_str!("book_config.toml"))?;
diff --git a/src/tools/tidy/src/error_codes.rs b/src/tools/tidy/src/error_codes.rs
index 8c904e8d7123a..c60caa0d49c6a 100644
--- a/src/tools/tidy/src/error_codes.rs
+++ b/src/tools/tidy/src/error_codes.rs
@@ -45,7 +45,7 @@ pub fn check(root_path: &Path, search_paths: &[&Path], verbose: bool, bad: &mut
let mut errors = Vec::new();
// Stage 1: create list
- let error_codes = extract_error_codes(root_path, &mut errors, verbose);
+ let error_codes = extract_error_codes(root_path, &mut errors);
println!("Found {} error codes", error_codes.len());
println!("Highest error code: `{}`", error_codes.iter().max().unwrap());
@@ -65,18 +65,17 @@ pub fn check(root_path: &Path, search_paths: &[&Path], verbose: bool, bad: &mut
}
/// Stage 1: Parses a list of error codes from `error_codes.rs`.
-fn extract_error_codes(root_path: &Path, errors: &mut Vec<String>, verbose: bool) -> Vec<String> {
+fn extract_error_codes(root_path: &Path, errors: &mut Vec<String>) -> Vec<String> {
let path = root_path.join(Path::new(ERROR_CODES_PATH));
let file =
fs::read_to_string(&path).unwrap_or_else(|e| panic!("failed to read `{path:?}`: {e}"));
let mut error_codes = Vec::new();
- let mut reached_undocumented_codes = false;
for line in file.lines() {
let line = line.trim();
- if !reached_undocumented_codes && line.starts_with('E') {
+ if line.starts_with('E') {
let split_line = line.split_once(':');
// Extract the error code from the line, emitting a fatal error if it is not in a correct format.
@@ -111,23 +110,6 @@ fn extract_error_codes(root_path: &Path, errors: &mut Vec<String>, verbose: bool
}
error_codes.push(err_code);
- } else if reached_undocumented_codes && line.starts_with('E') {
- let err_code = match line.split_once(',') {
- None => line,
- Some((err_code, _)) => err_code,
- }
- .to_string();
-
- verbose_print!(verbose, "warning: Error code `{}` is undocumented.", err_code);
-
- if error_codes.contains(&err_code) {
- errors.push(format!("Found duplicate error code: `{}`", err_code));
- }
-
- error_codes.push(err_code);
- } else if line == ";" {
- // Once we reach the undocumented error codes, adapt to different syntax.
- reached_undocumented_codes = true;
}
}