diff options
| -rw-r--r-- | src/librustc_errors/lib.rs | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/librustc_errors/lib.rs b/src/librustc_errors/lib.rs index cabafa052a3..84ac2c02253 100644 --- a/src/librustc_errors/lib.rs +++ b/src/librustc_errors/lib.rs @@ -244,6 +244,10 @@ pub struct Handler { continue_after_error: Cell<bool>, delayed_span_bug: RefCell<Option<Diagnostic>>, tracked_diagnostics: RefCell<Option<Vec<Diagnostic>>>, + + // This set contains the `DiagnosticId` of all emitted diagnostics to avoid + // emitting the same diagnostic with extended help (`--teach`) twice, which + // would be uneccessary repetition. tracked_diagnostic_codes: RefCell<FxHashSet<DiagnosticId>>, // This set contains a hash of every diagnostic that has been emitted by @@ -577,6 +581,10 @@ impl Handler { (ret, diagnostics) } + /// `true` if a diagnostic with this code has already been emitted in this handler. + /// + /// Used to suppress emitting the same error multiple times with extended explanation when + /// calling `-Zteach`. pub fn code_emitted(&self, code: &DiagnosticId) -> bool { self.tracked_diagnostic_codes.borrow().contains(code) } |