#![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
#![feature(array_windows)]
#![feature(extract_if)]
#![feature(if_let_guard)]
#![feature(let_chains)]
#![feature(never_type)]
#![feature(result_option_inspect)]
#![feature(rustc_attrs)]
#![feature(yeet_expr)]
#![feature(try_blocks)]
#![feature(box_patterns)]
#![feature(error_reporter)]
#![allow(incomplete_features)]
#![allow(internal_features)]
#[macro_use]
extern crate rustc_macros;
#[macro_use]
extern crate tracing;
extern crate self as rustc_errors;
pub use emitter::ColorConfig;
use rustc_lint_defs::LintExpectationId;
use Level::*;
use emitter::{is_case_difference, DynEmitter, Emitter, EmitterWriter};
use registry::Registry;
use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexMap, FxIndexSet};
use rustc_data_structures::stable_hasher::{Hash128, StableHasher};
use rustc_data_structures::sync::{Lock, Lrc};
use rustc_data_structures::AtomicRef;
pub use rustc_error_messages::{
fallback_fluent_bundle, fluent_bundle, DelayDm, DiagnosticMessage, FluentBundle,
LanguageIdentifier, LazyFallbackBundle, MultiSpan, SpanLabel, SubdiagnosticMessage,
};
use rustc_fluent_macro::fluent_messages;
pub use rustc_lint_defs::{pluralize, Applicability};
use rustc_span::source_map::SourceMap;
pub use rustc_span::ErrorGuaranteed;
use rustc_span::{Loc, Span, DUMMY_SP};
use std::borrow::Cow;
use std::error::Report;
use std::fmt;
use std::hash::Hash;
use std::io::Write;
use std::num::NonZeroUsize;
use std::panic;
use std::path::{Path, PathBuf};
pub use termcolor::{Color, ColorSpec, WriteColor};
pub mod annotate_snippet_emitter_writer;
mod diagnostic;
mod diagnostic_builder;
mod diagnostic_impls;
pub mod emitter;
pub mod error;
pub mod json;
mod lock;
pub mod markdown;
pub mod registry;
mod snippet;
mod styled_buffer;
#[cfg(test)]
mod tests;
pub mod translation;
pub use diagnostic_builder::IntoDiagnostic;
pub use snippet::Style;
pub type PErr<'a> = DiagnosticBuilder<'a, ErrorGuaranteed>;
pub type PResult<'a, T> = Result<T, PErr<'a>>;
fluent_messages! { "../messages.ftl" }
#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
rustc_data_structures::static_assert_size!(PResult<'_, ()>, 16);
#[cfg(all(target_arch = "x86_64", target_pointer_width = "64"))]
rustc_data_structures::static_assert_size!(PResult<'_, bool>, 16);
#[derive(Debug, PartialEq, Eq, Clone, Copy, Hash, Encodable, Decodable)]
pub enum SuggestionStyle {
HideCodeInline,
HideCodeAlways,
CompletelyHidden,
ShowCode,
ShowAlways,
}
impl SuggestionStyle {
fn hide_inline(&self) -> bool {
!matches!(*self, SuggestionStyle::ShowCode)
}
}
#[derive(Clone, Debug, PartialEq, Hash, Encodable, Decodable)]
pub struct CodeSuggestion {
pub substitutions: Vec<Substitution>,
pub msg: DiagnosticMessage,
pub style: SuggestionStyle,
pub applicability: Applicability,
}
#[derive(Clone, Debug, PartialEq, Hash, Encodable, Decodable)]
pub struct Substitution {
pub parts: Vec<SubstitutionPart>,
}
#[derive(Clone, Debug, PartialEq, Hash, Encodable, Decodable)]
pub struct SubstitutionPart {
pub span: Span,
pub snippet: String,
}
#[derive(Debug, Clone, Copy)]
pub struct SubstitutionHighlight {
start: usize,
end: usize,
}
impl SubstitutionPart {
pub fn is_addition(&self, sm: &SourceMap) -> bool {
!self.snippet.is_empty() && !self.replaces_meaningful_content(sm)
}
pub fn is_deletion(&self, sm: &SourceMap) -> bool {
self.snippet.trim().is_empty() && self.replaces_meaningful_content(sm)
}
pub fn is_replacement(&self, sm: &SourceMap) -> bool {
!self.snippet.is_empty() && self.replaces_meaningful_content(sm)
}
fn replaces_meaningful_content(&self, sm: &SourceMap) -> bool {
sm.span_to_snippet(self.span)
.map_or(!self.span.is_empty(), |snippet| !snippet.trim().is_empty())
}
}
impl CodeSuggestion {
pub fn splice_lines(
&self,
sm: &SourceMap,
) -> Vec<(String, Vec<SubstitutionPart>, Vec<Vec<SubstitutionHighlight>>, bool)> {
use rustc_span::{CharPos, Pos};
fn push_trailing(
buf: &mut String,
line_opt: Option<&Cow<'_, str>>,
lo: &Loc,
hi_opt: Option<&Loc>,
) -> usize {
let mut line_count = 0;
let (lo, hi_opt) = (lo.col.to_usize(), hi_opt.map(|hi| hi.col.to_usize()));
if let Some(line) = line_opt {
if let Some(lo) = line.char_indices().map(|(i, _)| i).nth(lo) {
let hi_opt = hi_opt.and_then(|hi| line.char_indices().map(|(i, _)| i).nth(hi));
match hi_opt {
Some(hi) if hi > lo => {
line_count = line[lo..hi].matches('\n').count();
buf.push_str(&line[lo..hi])
}
Some(_) => (),
None => {
line_count = line[lo..].matches('\n').count();
buf.push_str(&line[lo..])
}
}
}
if hi_opt.is_none() {
buf.push('\n');
}
}
line_count
}
assert!(!self.substitutions.is_empty());
self.substitutions
.iter()
.filter(|subst| {
let invalid = subst.parts.iter().any(|item| sm.is_valid_span(item.span).is_err());
if invalid {
debug!("splice_lines: suggestion contains an invalid span: {:?}", subst);
}
!invalid
})
.cloned()
.filter_map(|mut substitution| {
substitution.parts.sort_by_key(|part| part.span.lo());
let lo = substitution.parts.iter().map(|part| part.span.lo()).min()?;
let hi = substitution.parts.iter().map(|part| part.span.hi()).max()?;
let bounding_span = Span::with_root_ctxt(lo, hi);
let lines = sm.span_to_lines(bounding_span).ok()?;
assert!(!lines.lines.is_empty() || bounding_span.is_dummy());
if !sm.ensure_source_file_source_present(&lines.file) {
return None;
}
let mut highlights = vec![];
let sf = &lines.file;
let mut prev_hi = sm.lookup_char_pos(bounding_span.lo());
prev_hi.col = CharPos::from_usize(0);
let mut prev_line =
lines.lines.get(0).and_then(|line0| sf.get_line(line0.line_index));
let mut buf = String::new();
let mut line_highlight = vec![];
let mut acc = 0;
for part in &substitution.parts {
let cur_lo = sm.lookup_char_pos(part.span.lo());
if prev_hi.line == cur_lo.line {
let mut count =
push_trailing(&mut buf, prev_line.as_ref(), &prev_hi, Some(&cur_lo));
while count > 0 {
highlights.push(std::mem::take(&mut line_highlight));
acc = 0;
count -= 1;
}
} else {
acc = 0;
highlights.push(std::mem::take(&mut line_highlight));
let mut count = push_trailing(&mut buf, prev_line.as_ref(), &prev_hi, None);
while count > 0 {
highlights.push(std::mem::take(&mut line_highlight));
count -= 1;
}
for idx in prev_hi.line..(cur_lo.line - 1) {
if let Some(line) = sf.get_line(idx) {
buf.push_str(line.as_ref());
buf.push('\n');
highlights.push(std::mem::take(&mut line_highlight));
}
}
if let Some(cur_line) = sf.get_line(cur_lo.line - 1) {
let end = match cur_line.char_indices().nth(cur_lo.col.to_usize()) {
Some((i, _)) => i,
None => cur_line.len(),
};
buf.push_str(&cur_line[..end]);
}
}
let len: isize = part
.snippet
.split('\n')
.next()
.unwrap_or(&part.snippet)
.chars()
.map(|c| match c {
'\t' => 4,
_ => 1,
})
.sum();
line_highlight.push(SubstitutionHighlight {
start: (cur_lo.col.0 as isize + acc) as usize,
end: (cur_lo.col.0 as isize + acc + len) as usize,
});
buf.push_str(&part.snippet);
let cur_hi = sm.lookup_char_pos(part.span.hi());
acc += len - (cur_hi.col.0 as isize - cur_lo.col.0 as isize);
prev_hi = cur_hi;
prev_line = sf.get_line(prev_hi.line - 1);
for line in part.snippet.split('\n').skip(1) {
acc = 0;
highlights.push(std::mem::take(&mut line_highlight));
let end: usize = line
.chars()
.map(|c| match c {
'\t' => 4,
_ => 1,
})
.sum();
line_highlight.push(SubstitutionHighlight { start: 0, end });
}
}
highlights.push(std::mem::take(&mut line_highlight));
let only_capitalization = is_case_difference(sm, &buf, bounding_span);
if !buf.ends_with('\n') {
push_trailing(&mut buf, prev_line.as_ref(), &prev_hi, None);
}
while buf.ends_with('\n') {
buf.pop();
}
Some((buf, substitution.parts, highlights, only_capitalization))
})
.collect()
}
}
pub use rustc_span::fatal_error::{FatalError, FatalErrorMarker};
pub struct ExplicitBug;
pub struct DelayedBugPanic;
use crate::diagnostic_impls::{DelayedAtWithNewline, DelayedAtWithoutNewline};
pub use diagnostic::{
AddToDiagnostic, DecorateLint, Diagnostic, DiagnosticArg, DiagnosticArgValue, DiagnosticId,
DiagnosticStyledString, IntoDiagnosticArg, SubDiagnostic,
};
pub use diagnostic_builder::{DiagnosticBuilder, EmissionGuarantee, Noted};
pub use diagnostic_impls::{
DiagnosticArgFromDisplay, DiagnosticSymbolList, ExpectedLifetimeParameter,
IndicateAnonymousLifetime, InvalidFlushedDelayedDiagnosticLevel, LabelKind,
SingleLabelManySpans,
};
use std::backtrace::{Backtrace, BacktraceStatus};
pub struct Handler {
inner: Lock<HandlerInner>,
}
struct HandlerInner {
flags: HandlerFlags,
lint_err_count: usize,
err_count: usize,
warn_count: usize,
deduplicated_err_count: usize,
emitter: Box<DynEmitter>,
delayed_span_bugs: Vec<DelayedDiagnostic>,
delayed_good_path_bugs: Vec<DelayedDiagnostic>,
suppressed_expected_diag: bool,
taught_diagnostics: FxHashSet<DiagnosticId>,
emitted_diagnostic_codes: FxIndexSet<DiagnosticId>,
emitted_diagnostics: FxHashSet<Hash128>,
stashed_diagnostics: FxIndexMap<(Span, StashKey), Diagnostic>,
deduplicated_warn_count: usize,
future_breakage_diagnostics: Vec<Diagnostic>,
check_unstable_expect_diagnostics: bool,
unstable_expect_diagnostics: Vec<Diagnostic>,
fulfilled_expectations: FxHashSet<LintExpectationId>,
ice_file: Option<PathBuf>,
}
#[derive(Copy, Clone, PartialEq, Eq, Hash)]
pub enum StashKey {
ItemNoType,
UnderscoreForArrayLengths,
EarlySyntaxWarning,
CallIntoMethod,
LifetimeIsChar,
MaybeFruTypo,
CallAssocMethod,
TraitMissingMethod,
OpaqueHiddenTypeMismatch,
}
fn default_track_diagnostic(d: &mut Diagnostic, f: &mut dyn FnMut(&mut Diagnostic)) {
(*f)(d)
}
pub static TRACK_DIAGNOSTICS: AtomicRef<fn(&mut Diagnostic, &mut dyn FnMut(&mut Diagnostic))> =
AtomicRef::new(&(default_track_diagnostic as _));
#[derive(Copy, Clone, Default)]
pub struct HandlerFlags {
pub can_emit_warnings: bool,
pub treat_err_as_bug: Option<NonZeroUsize>,
pub dont_buffer_diagnostics: bool,
pub report_delayed_bugs: bool,
pub macro_backtrace: bool,
pub deduplicate_diagnostics: bool,
pub track_diagnostics: bool,
}
impl Drop for HandlerInner {
fn drop(&mut self) {
self.emit_stashed_diagnostics();
if !self.has_errors() {
let bugs = std::mem::replace(&mut self.delayed_span_bugs, Vec::new());
self.flush_delayed(bugs, "no errors encountered even though `delay_span_bug` issued");
}
if !self.has_any_message() && !self.suppressed_expected_diag {
let bugs = std::mem::replace(&mut self.delayed_good_path_bugs, Vec::new());
self.flush_delayed(
bugs,
"no warnings or errors encountered even though `delayed_good_path_bugs` issued",
);
}
if self.check_unstable_expect_diagnostics {
assert!(
self.unstable_expect_diagnostics.is_empty(),
"all diagnostics with unstable expectations should have been converted",
);
}
}
}
impl Handler {
pub fn with_tty_emitter(
sm: Option<Lrc<SourceMap>>,
fallback_bundle: LazyFallbackBundle,
) -> Self {
let emitter = Box::new(EmitterWriter::stderr(ColorConfig::Auto, fallback_bundle).sm(sm));
Self::with_emitter(emitter)
}
pub fn disable_warnings(mut self) -> Self {
self.inner.get_mut().flags.can_emit_warnings = false;
self
}
pub fn treat_err_as_bug(mut self, treat_err_as_bug: NonZeroUsize) -> Self {
self.inner.get_mut().flags.treat_err_as_bug = Some(treat_err_as_bug);
self
}
pub fn with_flags(mut self, flags: HandlerFlags) -> Self {
self.inner.get_mut().flags = flags;
self
}
pub fn with_ice_file(mut self, ice_file: PathBuf) -> Self {
self.inner.get_mut().ice_file = Some(ice_file);
self
}
pub fn with_emitter(emitter: Box<DynEmitter>) -> Self {
Self {
inner: Lock::new(HandlerInner {
flags: HandlerFlags { can_emit_warnings: true, ..Default::default() },
lint_err_count: 0,
err_count: 0,
warn_count: 0,
deduplicated_err_count: 0,
deduplicated_warn_count: 0,
emitter,
delayed_span_bugs: Vec::new(),
delayed_good_path_bugs: Vec::new(),
suppressed_expected_diag: false,
taught_diagnostics: Default::default(),
emitted_diagnostic_codes: Default::default(),
emitted_diagnostics: Default::default(),
stashed_diagnostics: Default::default(),
future_breakage_diagnostics: Vec::new(),
check_unstable_expect_diagnostics: false,
unstable_expect_diagnostics: Vec::new(),
fulfilled_expectations: Default::default(),
ice_file: None,
}),
}
}
pub fn eagerly_translate<'a>(
&self,
message: DiagnosticMessage,
args: impl Iterator<Item = DiagnosticArg<'a, 'static>>,
) -> SubdiagnosticMessage {
SubdiagnosticMessage::Eager(Cow::from(self.eagerly_translate_to_string(message, args)))
}
pub fn eagerly_translate_to_string<'a>(
&self,
message: DiagnosticMessage,
args: impl Iterator<Item = DiagnosticArg<'a, 'static>>,
) -> String {
let inner = self.inner.borrow();
let args = crate::translation::to_fluent_args(args);
inner.emitter.translate_message(&message, &args).map_err(Report::new).unwrap().to_string()
}
pub fn can_emit_warnings(&self) -> bool {
self.inner.lock().flags.can_emit_warnings
}
pub fn reset_err_count(&self) {
let mut inner = self.inner.borrow_mut();
inner.err_count = 0;
inner.warn_count = 0;
inner.deduplicated_err_count = 0;
inner.deduplicated_warn_count = 0;
inner.delayed_span_bugs = Default::default();
inner.delayed_good_path_bugs = Default::default();
inner.taught_diagnostics = Default::default();
inner.emitted_diagnostic_codes = Default::default();
inner.emitted_diagnostics = Default::default();
inner.stashed_diagnostics = Default::default();
}
pub fn stash_diagnostic(&self, span: Span, key: StashKey, diag: Diagnostic) {
let mut inner = self.inner.borrow_mut();
inner.stash((span.with_parent(None), key), diag);
}
pub fn steal_diagnostic(&self, span: Span, key: StashKey) -> Option<DiagnosticBuilder<'_, ()>> {
let mut inner = self.inner.borrow_mut();
inner
.steal((span.with_parent(None), key))
.map(|diag| DiagnosticBuilder::new_diagnostic(self, diag))
}
pub fn has_stashed_diagnostic(&self, span: Span, key: StashKey) -> bool {
self.inner.borrow().stashed_diagnostics.get(&(span.with_parent(None), key)).is_some()
}
pub fn emit_stashed_diagnostics(&self) -> Option<ErrorGuaranteed> {
self.inner.borrow_mut().emit_stashed_diagnostics()
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_diagnostic<G: EmissionGuarantee>(
&self,
msg: impl Into<DiagnosticMessage>,
) -> DiagnosticBuilder<'_, G> {
G::make_diagnostic_builder(self, msg)
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_span_warn(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
) -> DiagnosticBuilder<'_, ()> {
let mut result = self.struct_warn(msg);
result.set_span(span);
result
}
#[track_caller]
pub fn struct_span_warn_with_expectation(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
id: LintExpectationId,
) -> DiagnosticBuilder<'_, ()> {
let mut result = self.struct_warn_with_expectation(msg, id);
result.set_span(span);
result
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_span_allow(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
) -> DiagnosticBuilder<'_, ()> {
let mut result = self.struct_allow(msg);
result.set_span(span);
result
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_span_warn_with_code(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
code: DiagnosticId,
) -> DiagnosticBuilder<'_, ()> {
let mut result = self.struct_span_warn(span, msg);
result.code(code);
result
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_warn(&self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'_, ()> {
DiagnosticBuilder::new(self, Level::Warning(None), msg)
}
#[track_caller]
pub fn struct_warn_with_expectation(
&self,
msg: impl Into<DiagnosticMessage>,
id: LintExpectationId,
) -> DiagnosticBuilder<'_, ()> {
DiagnosticBuilder::new(self, Level::Warning(Some(id)), msg)
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_allow(&self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'_, ()> {
DiagnosticBuilder::new(self, Level::Allow, msg)
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_expect(
&self,
msg: impl Into<DiagnosticMessage>,
id: LintExpectationId,
) -> DiagnosticBuilder<'_, ()> {
DiagnosticBuilder::new(self, Level::Expect(id), msg)
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_span_err(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
) -> DiagnosticBuilder<'_, ErrorGuaranteed> {
let mut result = self.struct_err(msg);
result.set_span(span);
result
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_span_err_with_code(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
code: DiagnosticId,
) -> DiagnosticBuilder<'_, ErrorGuaranteed> {
let mut result = self.struct_span_err(span, msg);
result.code(code);
result
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_err(
&self,
msg: impl Into<DiagnosticMessage>,
) -> DiagnosticBuilder<'_, ErrorGuaranteed> {
DiagnosticBuilder::new_guaranteeing_error(self, msg)
}
#[doc(hidden)]
#[track_caller]
pub fn struct_err_lint(&self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'_, ()> {
DiagnosticBuilder::new(self, Level::Error { lint: true }, msg)
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_err_with_code(
&self,
msg: impl Into<DiagnosticMessage>,
code: DiagnosticId,
) -> DiagnosticBuilder<'_, ErrorGuaranteed> {
let mut result = self.struct_err(msg);
result.code(code);
result
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_warn_with_code(
&self,
msg: impl Into<DiagnosticMessage>,
code: DiagnosticId,
) -> DiagnosticBuilder<'_, ()> {
let mut result = self.struct_warn(msg);
result.code(code);
result
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_span_fatal(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
) -> DiagnosticBuilder<'_, !> {
let mut result = self.struct_fatal(msg);
result.set_span(span);
result
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_span_fatal_with_code(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
code: DiagnosticId,
) -> DiagnosticBuilder<'_, !> {
let mut result = self.struct_span_fatal(span, msg);
result.code(code);
result
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_fatal(&self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'_, !> {
DiagnosticBuilder::new_fatal(self, msg)
}
#[rustc_lint_diagnostics]
pub fn struct_help(&self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'_, ()> {
DiagnosticBuilder::new(self, Level::Help, msg)
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn struct_note_without_error(
&self,
msg: impl Into<DiagnosticMessage>,
) -> DiagnosticBuilder<'_, ()> {
DiagnosticBuilder::new(self, Level::Note, msg)
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn span_fatal(&self, span: impl Into<MultiSpan>, msg: impl Into<DiagnosticMessage>) -> ! {
self.emit_diag_at_span(Diagnostic::new(Fatal, msg), span);
FatalError.raise()
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn span_fatal_with_code(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
code: DiagnosticId,
) -> ! {
self.emit_diag_at_span(Diagnostic::new_with_code(Fatal, Some(code), msg), span);
FatalError.raise()
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn span_err(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
) -> ErrorGuaranteed {
self.emit_diag_at_span(Diagnostic::new(Error { lint: false }, msg), span).unwrap()
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn span_err_with_code(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
code: DiagnosticId,
) {
self.emit_diag_at_span(
Diagnostic::new_with_code(Error { lint: false }, Some(code), msg),
span,
);
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn span_warn(&self, span: impl Into<MultiSpan>, msg: impl Into<DiagnosticMessage>) {
self.emit_diag_at_span(Diagnostic::new(Warning(None), msg), span);
}
#[rustc_lint_diagnostics]
#[track_caller]
pub fn span_warn_with_code(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
code: DiagnosticId,
) {
self.emit_diag_at_span(Diagnostic::new_with_code(Warning(None), Some(code), msg), span);
}
pub fn span_bug(&self, span: impl Into<MultiSpan>, msg: impl Into<String>) -> ! {
self.inner.borrow_mut().span_bug(span, msg)
}
#[track_caller]
pub fn delay_span_bug(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<String>,
) -> ErrorGuaranteed {
self.inner.borrow_mut().delay_span_bug(span, msg)
}
pub fn delay_good_path_bug(&self, msg: impl Into<DiagnosticMessage>) {
self.inner.borrow_mut().delay_good_path_bug(msg)
}
#[track_caller]
pub fn span_bug_no_panic(&self, span: impl Into<MultiSpan>, msg: impl Into<DiagnosticMessage>) {
self.emit_diag_at_span(Diagnostic::new(Bug, msg), span);
}
#[track_caller]
#[rustc_lint_diagnostics]
pub fn span_note_without_error(
&self,
span: impl Into<MultiSpan>,
msg: impl Into<DiagnosticMessage>,
) {
self.emit_diag_at_span(Diagnostic::new(Note, msg), span);
}
#[track_caller]
#[rustc_lint_diagnostics]
pub fn span_note_diag(
&self,
span: Span,
msg: impl Into<DiagnosticMessage>,
) -> DiagnosticBuilder<'_, ()> {
let mut db = DiagnosticBuilder::new(self, Note, msg);
db.set_span(span);
db
}
#[rustc_lint_diagnostics]
pub fn fatal(&self, msg: impl Into<DiagnosticMessage>) -> FatalError {
self.inner.borrow_mut().fatal(msg)
}
#[rustc_lint_diagnostics]
pub fn err(&self, msg: impl Into<DiagnosticMessage>) -> ErrorGuaranteed {
self.inner.borrow_mut().err(msg)
}
#[rustc_lint_diagnostics]
pub fn warn(&self, msg: impl Into<DiagnosticMessage>) {
let mut db = DiagnosticBuilder::new(self, Warning(None), msg);
db.emit();
}
#[rustc_lint_diagnostics]
pub fn note_without_error(&self, msg: impl Into<DiagnosticMessage>) {
DiagnosticBuilder::new(self, Note, msg).emit();
}
pub fn bug(&self, msg: impl Into<DiagnosticMessage>) -> ! {
self.inner.borrow_mut().bug(msg)
}
#[inline]
pub fn err_count(&self) -> usize {
self.inner.borrow().err_count()
}
pub fn has_errors(&self) -> Option<ErrorGuaranteed> {
self.inner.borrow().has_errors().then(|| {
#[allow(deprecated)]
ErrorGuaranteed::unchecked_claim_error_was_emitted()
})
}
pub fn has_errors_or_lint_errors(&self) -> Option<ErrorGuaranteed> {
self.inner.borrow().has_errors_or_lint_errors().then(|| {
#[allow(deprecated)]
ErrorGuaranteed::unchecked_claim_error_was_emitted()
})
}
pub fn has_errors_or_delayed_span_bugs(&self) -> Option<ErrorGuaranteed> {
self.inner.borrow().has_errors_or_delayed_span_bugs().then(|| {
#[allow(deprecated)]
ErrorGuaranteed::unchecked_claim_error_was_emitted()
})
}
pub fn is_compilation_going_to_fail(&self) -> Option<ErrorGuaranteed> {
self.inner.borrow().is_compilation_going_to_fail().then(|| {
#[allow(deprecated)]
ErrorGuaranteed::unchecked_claim_error_was_emitted()
})
}
pub fn print_error_count(&self, registry: &Registry) {
self.inner.borrow_mut().print_error_count(registry)
}
pub fn take_future_breakage_diagnostics(&self) -> Vec<Diagnostic> {
std::mem::take(&mut self.inner.borrow_mut().future_breakage_diagnostics)
}
pub fn abort_if_errors(&self) {
self.inner.borrow_mut().abort_if_errors()
}
pub fn must_teach(&self, code: &DiagnosticId) -> bool {
self.inner.borrow_mut().must_teach(code)
}
pub fn force_print_diagnostic(&self, db: Diagnostic) {
self.inner.borrow_mut().force_print_diagnostic(db)
}
pub fn emit_diagnostic(&self, diagnostic: &mut Diagnostic) -> Option<ErrorGuaranteed> {
self.inner.borrow_mut().emit_diagnostic(diagnostic)
}
pub fn emit_err<'a>(&'a self, err: impl IntoDiagnostic<'a>) -> ErrorGuaranteed {
self.create_err(err).emit()
}
pub fn create_err<'a>(
&'a self,
err: impl IntoDiagnostic<'a>,
) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
err.into_diagnostic(self)
}
pub fn create_warning<'a>(
&'a self,
warning: impl IntoDiagnostic<'a, ()>,
) -> DiagnosticBuilder<'a, ()> {
warning.into_diagnostic(self)
}
pub fn emit_warning<'a>(&'a self, warning: impl IntoDiagnostic<'a, ()>) {
self.create_warning(warning).emit()
}
pub fn create_almost_fatal<'a>(
&'a self,
fatal: impl IntoDiagnostic<'a, FatalError>,
) -> DiagnosticBuilder<'a, FatalError> {
fatal.into_diagnostic(self)
}
pub fn emit_almost_fatal<'a>(
&'a self,
fatal: impl IntoDiagnostic<'a, FatalError>,
) -> FatalError {
self.create_almost_fatal(fatal).emit()
}
pub fn create_fatal<'a>(
&'a self,
fatal: impl IntoDiagnostic<'a, !>,
) -> DiagnosticBuilder<'a, !> {
fatal.into_diagnostic(self)
}
pub fn emit_fatal<'a>(&'a self, fatal: impl IntoDiagnostic<'a, !>) -> ! {
self.create_fatal(fatal).emit()
}
pub fn create_bug<'a>(
&'a self,
bug: impl IntoDiagnostic<'a, diagnostic_builder::Bug>,
) -> DiagnosticBuilder<'a, diagnostic_builder::Bug> {
bug.into_diagnostic(self)
}
pub fn emit_bug<'a>(
&'a self,
bug: impl IntoDiagnostic<'a, diagnostic_builder::Bug>,
) -> diagnostic_builder::Bug {
self.create_bug(bug).emit()
}
pub fn emit_note<'a>(&'a self, note: impl IntoDiagnostic<'a, Noted>) -> Noted {
self.create_note(note).emit()
}
pub fn create_note<'a>(
&'a self,
note: impl IntoDiagnostic<'a, Noted>,
) -> DiagnosticBuilder<'a, Noted> {
note.into_diagnostic(self)
}
fn emit_diag_at_span(
&self,
mut diag: Diagnostic,
sp: impl Into<MultiSpan>,
) -> Option<ErrorGuaranteed> {
let mut inner = self.inner.borrow_mut();
inner.emit_diagnostic(diag.set_span(sp))
}
pub fn emit_artifact_notification(&self, path: &Path, artifact_type: &str) {
self.inner.borrow_mut().emit_artifact_notification(path, artifact_type)
}
pub fn emit_future_breakage_report(&self, diags: Vec<Diagnostic>) {
self.inner.borrow_mut().emitter.emit_future_breakage_report(diags)
}
pub fn emit_unused_externs(
&self,
lint_level: rustc_lint_defs::Level,
loud: bool,
unused_externs: &[&str],
) {
let mut inner = self.inner.borrow_mut();
if loud && lint_level.is_error() {
inner.bump_err_count();
}
inner.emit_unused_externs(lint_level, unused_externs)
}
pub fn update_unstable_expectation_id(
&self,
unstable_to_stable: &FxHashMap<LintExpectationId, LintExpectationId>,
) {
let mut inner = self.inner.borrow_mut();
let diags = std::mem::take(&mut inner.unstable_expect_diagnostics);
inner.check_unstable_expect_diagnostics = true;
if !diags.is_empty() {
inner.suppressed_expected_diag = true;
for mut diag in diags.into_iter() {
diag.update_unstable_expectation_id(unstable_to_stable);
inner.emit_diagnostic(&mut diag);
}
}
inner
.stashed_diagnostics
.values_mut()
.for_each(|diag| diag.update_unstable_expectation_id(unstable_to_stable));
inner
.future_breakage_diagnostics
.iter_mut()
.for_each(|diag| diag.update_unstable_expectation_id(unstable_to_stable));
}
#[must_use]
pub fn steal_fulfilled_expectation_ids(&self) -> FxHashSet<LintExpectationId> {
assert!(
self.inner.borrow().unstable_expect_diagnostics.is_empty(),
"`HandlerInner::unstable_expect_diagnostics` should be empty at this point",
);
std::mem::take(&mut self.inner.borrow_mut().fulfilled_expectations)
}
pub fn flush_delayed(&self) {
let mut inner = self.inner.lock();
let bugs = std::mem::replace(&mut inner.delayed_span_bugs, Vec::new());
inner.flush_delayed(bugs, "no errors encountered even though `delay_span_bug` issued");
}
}
impl HandlerInner {
fn must_teach(&mut self, code: &DiagnosticId) -> bool {
self.taught_diagnostics.insert(code.clone())
}
fn force_print_diagnostic(&mut self, db: Diagnostic) {
self.emitter.emit_diagnostic(&db);
}
fn emit_stashed_diagnostics(&mut self) -> Option<ErrorGuaranteed> {
let has_errors = self.has_errors();
let diags = self.stashed_diagnostics.drain(..).map(|x| x.1).collect::<Vec<_>>();
let mut reported = None;
for mut diag in diags {
if diag.is_error() {
if matches!(diag.level, Level::Error { lint: true }) {
self.lint_err_count -= 1;
} else {
self.err_count -= 1;
}
} else {
if diag.is_force_warn() {
self.warn_count -= 1;
} else {
if has_errors {
continue;
}
}
}
let reported_this = self.emit_diagnostic(&mut diag);
reported = reported.or(reported_this);
}
reported
}
fn emit_diagnostic(&mut self, diagnostic: &mut Diagnostic) -> Option<ErrorGuaranteed> {
if let Some(LintExpectationId::Unstable { .. }) = diagnostic.level.get_expectation_id() {
self.unstable_expect_diagnostics.push(diagnostic.clone());
return None;
}
if diagnostic.level == Level::DelayedBug {
let backtrace = std::backtrace::Backtrace::capture();
self.delayed_span_bugs
.push(DelayedDiagnostic::with_backtrace(diagnostic.clone(), backtrace));
if !self.flags.report_delayed_bugs {
#[allow(deprecated)]
return Some(ErrorGuaranteed::unchecked_claim_error_was_emitted());
}
}
if diagnostic.has_future_breakage() {
self.suppressed_expected_diag = true;
self.future_breakage_diagnostics.push(diagnostic.clone());
}
if let Some(expectation_id) = diagnostic.level.get_expectation_id() {
self.suppressed_expected_diag = true;
self.fulfilled_expectations.insert(expectation_id.normalize());
}
if matches!(diagnostic.level, Warning(_))
&& !self.flags.can_emit_warnings
&& !diagnostic.is_force_warn()
{
if diagnostic.has_future_breakage() {
(*TRACK_DIAGNOSTICS)(diagnostic, &mut |_| {});
}
return None;
}
if matches!(diagnostic.level, Level::Expect(_) | Level::Allow) {
(*TRACK_DIAGNOSTICS)(diagnostic, &mut |_| {});
return None;
}
let mut guaranteed = None;
(*TRACK_DIAGNOSTICS)(diagnostic, &mut |diagnostic| {
if let Some(ref code) = diagnostic.code {
self.emitted_diagnostic_codes.insert(code.clone());
}
let already_emitted = {
let mut hasher = StableHasher::new();
diagnostic.hash(&mut hasher);
let diagnostic_hash = hasher.finish();
!self.emitted_diagnostics.insert(diagnostic_hash)
};
if !(self.flags.deduplicate_diagnostics && already_emitted) {
debug!(?diagnostic);
debug!(?self.emitted_diagnostics);
let already_emitted_sub = |sub: &mut SubDiagnostic| {
debug!(?sub);
if sub.level != Level::OnceNote && sub.level != Level::OnceHelp {
return false;
}
let mut hasher = StableHasher::new();
sub.hash(&mut hasher);
let diagnostic_hash = hasher.finish();
debug!(?diagnostic_hash);
!self.emitted_diagnostics.insert(diagnostic_hash)
};
diagnostic.children.extract_if(already_emitted_sub).for_each(|_| {});
if already_emitted {
diagnostic.note(
"duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`",
);
}
self.emitter.emit_diagnostic(diagnostic);
if diagnostic.is_error() {
self.deduplicated_err_count += 1;
} else if let Warning(_) = diagnostic.level {
self.deduplicated_warn_count += 1;
}
}
if diagnostic.is_error() {
if matches!(diagnostic.level, Level::Error { lint: true }) {
self.bump_lint_err_count();
} else {
self.bump_err_count();
}
#[allow(deprecated)]
{
guaranteed = Some(ErrorGuaranteed::unchecked_claim_error_was_emitted());
}
} else {
self.bump_warn_count();
}
});
guaranteed
}
fn emit_artifact_notification(&mut self, path: &Path, artifact_type: &str) {
self.emitter.emit_artifact_notification(path, artifact_type);
}
fn emit_unused_externs(&mut self, lint_level: rustc_lint_defs::Level, unused_externs: &[&str]) {
self.emitter.emit_unused_externs(lint_level, unused_externs);
}
fn treat_err_as_bug(&self) -> bool {
self.flags.treat_err_as_bug.is_some_and(|c| {
self.err_count() + self.lint_err_count + self.delayed_bug_count() >= c.get()
})
}
fn delayed_bug_count(&self) -> usize {
self.delayed_span_bugs.len() + self.delayed_good_path_bugs.len()
}
fn print_error_count(&mut self, registry: &Registry) {
self.emit_stashed_diagnostics();
let warnings = match self.deduplicated_warn_count {
0 => Cow::from(""),
1 => Cow::from("1 warning emitted"),
count => Cow::from(format!("{count} warnings emitted")),
};
let errors = match self.deduplicated_err_count {
0 => Cow::from(""),
1 => Cow::from("aborting due to previous error"),
count => Cow::from(format!("aborting due to {count} previous errors")),
};
if self.treat_err_as_bug() {
return;
}
match (errors.len(), warnings.len()) {
(0, 0) => return,
(0, _) => self.emitter.emit_diagnostic(&Diagnostic::new(
Level::Warning(None),
DiagnosticMessage::Str(warnings),
)),
(_, 0) => {
let _ = self.fatal(errors);
}
(_, _) => {
let _ = self.fatal(format!("{errors}; {warnings}"));
}
}
let can_show_explain = self.emitter.should_show_explain();
let are_there_diagnostics = !self.emitted_diagnostic_codes.is_empty();
if can_show_explain && are_there_diagnostics {
let mut error_codes = self
.emitted_diagnostic_codes
.iter()
.filter_map(|x| match &x {
DiagnosticId::Error(s) if registry.try_find_description(s).is_ok() => {
Some(s.clone())
}
_ => None,
})
.collect::<Vec<_>>();
if !error_codes.is_empty() {
error_codes.sort();
if error_codes.len() > 1 {
let limit = if error_codes.len() > 9 { 9 } else { error_codes.len() };
self.failure(format!(
"Some errors have detailed explanations: {}{}",
error_codes[..limit].join(", "),
if error_codes.len() > 9 { "..." } else { "." }
));
self.failure(format!(
"For more information about an error, try \
`rustc --explain {}`.",
&error_codes[0]
));
} else {
self.failure(format!(
"For more information about this error, try \
`rustc --explain {}`.",
&error_codes[0]
));
}
}
}
}
fn stash(&mut self, key: (Span, StashKey), diagnostic: Diagnostic) {
if diagnostic.is_error() {
if matches!(diagnostic.level, Level::Error { lint: true }) {
self.lint_err_count += 1;
} else {
self.err_count += 1;
}
} else {
if diagnostic.is_force_warn() {
self.warn_count += 1;
}
}
self.stashed_diagnostics.insert(key, diagnostic);
}
fn steal(&mut self, key: (Span, StashKey)) -> Option<Diagnostic> {
let diagnostic = self.stashed_diagnostics.remove(&key)?;
if diagnostic.is_error() {
if matches!(diagnostic.level, Level::Error { lint: true }) {
self.lint_err_count -= 1;
} else {
self.err_count -= 1;
}
} else {
if diagnostic.is_force_warn() {
self.warn_count -= 1;
}
}
Some(diagnostic)
}
#[inline]
fn err_count(&self) -> usize {
self.err_count
}
fn has_errors(&self) -> bool {
self.err_count() > 0
}
fn has_errors_or_lint_errors(&self) -> bool {
self.has_errors() || self.lint_err_count > 0
}
fn has_errors_or_delayed_span_bugs(&self) -> bool {
self.has_errors() || !self.delayed_span_bugs.is_empty()
}
fn has_any_message(&self) -> bool {
self.err_count() > 0 || self.lint_err_count > 0 || self.warn_count > 0
}
fn is_compilation_going_to_fail(&self) -> bool {
self.has_errors() || self.lint_err_count > 0 || !self.delayed_span_bugs.is_empty()
}
fn abort_if_errors(&mut self) {
self.emit_stashed_diagnostics();
if self.has_errors() {
FatalError.raise();
}
}
#[track_caller]
fn span_bug(&mut self, sp: impl Into<MultiSpan>, msg: impl Into<String>) -> ! {
self.emit_diag_at_span(Diagnostic::new(Bug, msg.into()), sp);
panic::panic_any(ExplicitBug);
}
fn emit_diag_at_span(&mut self, mut diag: Diagnostic, sp: impl Into<MultiSpan>) {
self.emit_diagnostic(diag.set_span(sp));
}
#[track_caller]
fn delay_span_bug(
&mut self,
sp: impl Into<MultiSpan>,
msg: impl Into<String>,
) -> ErrorGuaranteed {
if self.flags.treat_err_as_bug.is_some_and(|c| {
self.err_count() + self.lint_err_count + self.delayed_bug_count() + 1 >= c.get()
}) {
self.span_bug(sp, msg.into());
}
let mut diagnostic = Diagnostic::new(Level::DelayedBug, msg.into());
diagnostic.set_span(sp.into());
self.emit_diagnostic(&mut diagnostic).unwrap()
}
fn delay_good_path_bug(&mut self, msg: impl Into<DiagnosticMessage>) {
let mut diagnostic = Diagnostic::new(Level::DelayedBug, msg);
if self.flags.report_delayed_bugs {
self.emit_diagnostic(&mut diagnostic);
}
let backtrace = std::backtrace::Backtrace::capture();
self.delayed_good_path_bugs.push(DelayedDiagnostic::with_backtrace(diagnostic, backtrace));
}
fn failure(&mut self, msg: impl Into<DiagnosticMessage>) {
self.emit_diagnostic(&mut Diagnostic::new(FailureNote, msg));
}
fn fatal(&mut self, msg: impl Into<DiagnosticMessage>) -> FatalError {
self.emit(Fatal, msg);
FatalError
}
fn err(&mut self, msg: impl Into<DiagnosticMessage>) -> ErrorGuaranteed {
self.emit(Error { lint: false }, msg)
}
fn emit(&mut self, level: Level, msg: impl Into<DiagnosticMessage>) -> ErrorGuaranteed {
if self.treat_err_as_bug() {
self.bug(msg);
}
self.emit_diagnostic(&mut Diagnostic::new(level, msg)).unwrap()
}
fn bug(&mut self, msg: impl Into<DiagnosticMessage>) -> ! {
self.emit_diagnostic(&mut Diagnostic::new(Bug, msg));
panic::panic_any(ExplicitBug);
}
fn flush_delayed(
&mut self,
bugs: impl IntoIterator<Item = DelayedDiagnostic>,
explanation: impl Into<DiagnosticMessage> + Copy,
) {
let mut no_bugs = true;
let backtrace = std::env::var_os("RUST_BACKTRACE").map_or(true, |x| &x != "0");
for bug in bugs {
if let Some(file) = self.ice_file.as_ref()
&& let Ok(mut out) = std::fs::File::options().create(true).append(true).open(file)
{
let _ = write!(
&mut out,
"delayed span bug: {}\n{}\n",
bug.inner.styled_message().iter().filter_map(|(msg, _)| msg.as_str()).collect::<String>(),
&bug.note
);
}
let mut bug =
if backtrace || self.ice_file.is_none() { bug.decorate() } else { bug.inner };
if no_bugs {
self.emit_diagnostic(&mut Diagnostic::new(Bug, explanation));
no_bugs = false;
}
if bug.level != Level::DelayedBug {
bug.subdiagnostic(InvalidFlushedDelayedDiagnosticLevel {
span: bug.span.primary_span().unwrap(),
level: bug.level,
});
}
bug.level = Level::Bug;
self.emit_diagnostic(&mut bug);
}
if !no_bugs {
panic::panic_any(DelayedBugPanic);
}
}
fn bump_lint_err_count(&mut self) {
self.lint_err_count += 1;
self.panic_if_treat_err_as_bug();
}
fn bump_err_count(&mut self) {
self.err_count += 1;
self.panic_if_treat_err_as_bug();
}
fn bump_warn_count(&mut self) {
self.warn_count += 1;
}
fn panic_if_treat_err_as_bug(&self) {
if self.treat_err_as_bug() {
match (
self.err_count() + self.lint_err_count,
self.delayed_bug_count(),
self.flags.treat_err_as_bug.map(|c| c.get()).unwrap(),
) {
(1, 0, 1) => panic!("aborting due to `-Z treat-err-as-bug=1`"),
(0, 1, 1) => panic!("aborting due delayed bug with `-Z treat-err-as-bug=1`"),
(count, delayed_count, val) => {
if delayed_count > 0 {
panic!(
"aborting after {count} errors and {delayed_count} delayed bugs due to `-Z treat-err-as-bug={val}`",
)
} else {
panic!("aborting after {count} errors due to `-Z treat-err-as-bug={val}`")
}
}
}
}
}
}
struct DelayedDiagnostic {
inner: Diagnostic,
note: Backtrace,
}
impl DelayedDiagnostic {
fn with_backtrace(diagnostic: Diagnostic, backtrace: Backtrace) -> Self {
DelayedDiagnostic { inner: diagnostic, note: backtrace }
}
fn decorate(mut self) -> Diagnostic {
match self.note.status() {
BacktraceStatus::Captured => {
let inner = &self.inner;
self.inner.subdiagnostic(DelayedAtWithNewline {
span: inner.span.primary_span().unwrap_or(DUMMY_SP),
emitted_at: inner.emitted_at.clone(),
note: self.note,
});
}
_ => {
let inner = &self.inner;
self.inner.subdiagnostic(DelayedAtWithoutNewline {
span: inner.span.primary_span().unwrap_or(DUMMY_SP),
emitted_at: inner.emitted_at.clone(),
note: self.note,
});
}
}
self.inner
}
}
#[derive(Copy, PartialEq, Eq, Clone, Hash, Debug, Encodable, Decodable)]
pub enum Level {
Bug,
DelayedBug,
Fatal,
Error {
lint: bool,
},
Warning(Option<LintExpectationId>),
Note,
OnceNote,
Help,
OnceHelp,
FailureNote,
Allow,
Expect(LintExpectationId),
}
impl fmt::Display for Level {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.to_str().fmt(f)
}
}
impl Level {
fn color(self) -> ColorSpec {
let mut spec = ColorSpec::new();
match self {
Bug | DelayedBug | Fatal | Error { .. } => {
spec.set_fg(Some(Color::Red)).set_intense(true);
}
Warning(_) => {
spec.set_fg(Some(Color::Yellow)).set_intense(cfg!(windows));
}
Note | OnceNote => {
spec.set_fg(Some(Color::Green)).set_intense(true);
}
Help | OnceHelp => {
spec.set_fg(Some(Color::Cyan)).set_intense(true);
}
FailureNote => {}
Allow | Expect(_) => unreachable!(),
}
spec
}
pub fn to_str(self) -> &'static str {
match self {
Bug | DelayedBug => "error: internal compiler error",
Fatal | Error { .. } => "error",
Warning(_) => "warning",
Note | OnceNote => "note",
Help | OnceHelp => "help",
FailureNote => "failure-note",
Allow => panic!("Shouldn't call on allowed error"),
Expect(_) => panic!("Shouldn't call on expected error"),
}
}
pub fn is_failure_note(&self) -> bool {
matches!(*self, FailureNote)
}
pub fn get_expectation_id(&self) -> Option<LintExpectationId> {
match self {
Level::Expect(id) | Level::Warning(Some(id)) => Some(*id),
_ => None,
}
}
}
pub fn add_elided_lifetime_in_path_suggestion(
source_map: &SourceMap,
diag: &mut Diagnostic,
n: usize,
path_span: Span,
incl_angl_brckt: bool,
insertion_span: Span,
) {
diag.subdiagnostic(ExpectedLifetimeParameter { span: path_span, count: n });
if !source_map.is_span_accessible(insertion_span) {
return;
}
let anon_lts = vec!["'_"; n].join(", ");
let suggestion =
if incl_angl_brckt { format!("<{anon_lts}>") } else { format!("{anon_lts}, ") };
diag.subdiagnostic(IndicateAnonymousLifetime {
span: insertion_span.shrink_to_hi(),
count: n,
suggestion,
});
}
pub fn report_ambiguity_error<'a, G: EmissionGuarantee>(
db: &mut DiagnosticBuilder<'a, G>,
ambiguity: rustc_lint_defs::AmbiguityErrorDiag,
) {
db.span_label(ambiguity.label_span, ambiguity.label_msg);
db.note(ambiguity.note_msg);
db.span_note(ambiguity.b1_span, ambiguity.b1_note_msg);
for help_msg in ambiguity.b1_help_msgs {
db.help(help_msg);
}
db.span_note(ambiguity.b2_span, ambiguity.b2_note_msg);
for help_msg in ambiguity.b2_help_msgs {
db.help(help_msg);
}
}
#[derive(Clone, Copy, PartialEq, Hash, Debug)]
pub enum TerminalUrl {
No,
Yes,
Auto,
}