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Refactor emit_diagnostic.

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- Combine two different blocks involving
  `diagnostic.level.get_expectation_id()` into one.
- Combine several `if`s involving `diagnostic.level` into a single
  `match`.

This requires reordering some of the operations, but this has no
functional effect.
This commit is contained in:
Nicholas Nethercote 2024-01-31 15:10:23 +11:00
parent 5dd0431386
commit c367386832
1 changed files with 40 additions and 44 deletions
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70
compiler/rustc_errors/src/lib.rs
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@ -1247,24 +1247,41 @@ impl DiagCtxtInner {
}
fn emit_diagnostic(&mut self, mut diagnostic: Diagnostic) -> Option<ErrorGuaranteed> {
if let Some(expectation_id) = diagnostic.level.get_expectation_id() {
// The `LintExpectationId` can be stable or unstable depending on when it was created.
// Diagnostics created before the definition of `HirId`s are unstable and can not yet
// be stored. Instead, they are buffered until the `LintExpectationId` is replaced by
// a stable one by the `LintLevelsBuilder`.
if let Some(LintExpectationId::Unstable { .. }) = diagnostic.level.get_expectation_id() {
if let LintExpectationId::Unstable { .. } = expectation_id {
self.unstable_expect_diagnostics.push(diagnostic);
return None;
}
self.suppressed_expected_diag = true;
self.fulfilled_expectations.insert(expectation_id.normalize());
}
if diagnostic.has_future_breakage() {
// Future breakages aren't emitted if they're Level::Allow,
// but they still need to be constructed and stashed below,
// so they'll trigger the good-path bug check.
self.suppressed_expected_diag = true;
self.future_breakage_diagnostics.push(diagnostic.clone());
}
if matches!(diagnostic.level, DelayedBug(_)) && self.flags.eagerly_emit_delayed_bugs {
diagnostic.level = Error;
}
match diagnostic.level {
// This must come after the possible promotion of `DelayedBug` to `Error` above.
Fatal | Error if self.treat_next_err_as_bug() => {
diagnostic.level = Bug;
}
DelayedBug(DelayedBugKind::Normal) => {
// FIXME(eddyb) this should check for `has_errors` and stop pushing
// once *any* errors were emitted (and truncate `span_delayed_bugs`
// when an error is first emitted, also), but maybe there's a case
// in which that's not sound? otherwise this is really inefficient.
match diagnostic.level {
DelayedBug(_) if self.flags.eagerly_emit_delayed_bugs => {
diagnostic.level = Error;
}
DelayedBug(DelayedBugKind::Normal) => {
let backtrace = std::backtrace::Backtrace::capture();
self.span_delayed_bugs
.push(DelayedDiagnostic::with_backtrace(diagnostic, backtrace));
@ -1277,40 +1294,19 @@ impl DiagCtxtInner {
.push(DelayedDiagnostic::with_backtrace(diagnostic, backtrace));
return None;
}
Warning if !self.flags.can_emit_warnings => {
if diagnostic.has_future_breakage() {
(*TRACK_DIAGNOSTIC)(diagnostic, &mut |_| {});
}
return None;
}
Allow | Expect(_) => {
(*TRACK_DIAGNOSTIC)(diagnostic, &mut |_| {});
return None;
}
_ => {}
}
// This must come after the possible promotion of `DelayedBug` to
// `Error` above.
if matches!(diagnostic.level, Error | Fatal) && self.treat_next_err_as_bug() {
diagnostic.level = Bug;
}
if diagnostic.has_future_breakage() {
// Future breakages aren't emitted if they're Level::Allow,
// but they still need to be constructed and stashed below,
// so they'll trigger the good-path bug check.
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 diagnostic.level == Warning && !self.flags.can_emit_warnings {
if diagnostic.has_future_breakage() {
(*TRACK_DIAGNOSTIC)(diagnostic, &mut |_| {});
}
return None;
}
if matches!(diagnostic.level, Expect(_) | Allow) {
(*TRACK_DIAGNOSTIC)(diagnostic, &mut |_| {});
return None;
}
let mut guaranteed = None;
(*TRACK_DIAGNOSTIC)(diagnostic, &mut |mut diagnostic| {
if let Some(code) = diagnostic.code {