Struct DiagCtxtInner

pub(crate) struct DiagCtxtInner {

    pub(crate) flags: DiagCtxtFlags,
    pub(crate) err_guars: Vec<ErrorGuaranteed>,
    pub(crate) lint_err_guars: Vec<ErrorGuaranteed>,
    pub(crate) delayed_bugs: Vec<(DelayedDiagInner, ErrorGuaranteed)>,
    pub(crate) deduplicated_err_count: usize,
    pub(crate) deduplicated_warn_count: usize,
    pub(crate) emitter: Box<DynEmitter>,
    pub(crate) must_produce_diag: Option<Backtrace>,
    pub(crate) has_printed: bool,
    pub(crate) suppressed_expected_diag: bool,
    pub(crate) taught_diagnostics: FxHashSet<ErrCode>,
    pub(crate) emitted_diagnostic_codes: FxIndexSet<ErrCode>,
    pub(crate) emitted_diagnostics: FxHashSet<Hash128>,
    pub(crate) stashed_diagnostics: FxIndexMap<(Span, StashKey), (DiagInner, Option<ErrorGuaranteed>)>,
    pub(crate) future_breakage_diagnostics: Vec<DiagInner>,
    pub(crate) fulfilled_expectations: FxIndexSet<LintExpectationId>,
    pub(crate) ice_file: Option<PathBuf>,
}

This inner struct exists to keep it all behind a single lock; this is done to prevent possible deadlocks in a multi-threaded compiler, as well as inconsistent state observation.

Fields

flags: DiagCtxtFlags

err_guars: Vec<ErrorGuaranteed>

The error guarantees from all emitted errors. The length gives the error count.

lint_err_guars: Vec<ErrorGuaranteed>

The error guarantee from all emitted lint errors. The length gives the lint error count.

delayed_bugs: Vec<(DelayedDiagInner, ErrorGuaranteed)>

The delayed bugs and their error guarantees.

deduplicated_err_count: usize

The error count shown to the user at the end.

deduplicated_warn_count: usize

The warning count shown to the user at the end.

emitter: Box<DynEmitter>

must_produce_diag: Option<Backtrace>

Must we produce a diagnostic to justify the use of the expensive trimmed_def_paths function? Backtrace is the location of the call.

has_printed: bool

Has this diagnostic context printed any diagnostics? (I.e. has self.emitter.emit_diagnostic() been called?

suppressed_expected_diag: bool

This flag indicates that an expected diagnostic was emitted and suppressed. This is used for the must_produce_diag check.

taught_diagnostics: FxHashSet<ErrCode>

This set contains the code of all emitted diagnostics to avoid emitting the same diagnostic with extended help (--teach) twice, which would be unnecessary repetition.

emitted_diagnostic_codes: FxIndexSet<ErrCode>

Used to suggest rustc –explain <error code>

emitted_diagnostics: FxHashSet<Hash128>

This set contains a hash of every diagnostic that has been emitted by this DiagCtxt. These hashes is used to avoid emitting the same error twice.

stashed_diagnostics: FxIndexMap<(Span, StashKey), (DiagInner, Option<ErrorGuaranteed>)>

Stashed diagnostics emitted in one stage of the compiler that may be stolen and emitted/cancelled by other stages (e.g. to improve them and add more information). All stashed diagnostics must be emitted with emit_stashed_diagnostics by the time the DiagCtxtInner is dropped, otherwise an assertion failure will occur.

future_breakage_diagnostics: Vec<DiagInner>

fulfilled_expectations: FxIndexSet<LintExpectationId>

expected diagnostic will have the level Expect which additionally carries the [LintExpectationId] of the expectation that can be marked as fulfilled. This is a collection of all [LintExpectationId]s that have been marked as fulfilled this way.

Emitting expectations after having stolen this field can happen. In particular, an #[expect(warnings)] can easily make the UNFULFILLED_LINT_EXPECTATIONS lint expect itself. To avoid needless complexity in this corner case, we tolerate failing to track those expectations.

ice_file: Option<PathBuf>

The file where the ICE information is stored. This allows delayed_span_bug backtraces to be stored along side the main panic backtrace.

Implementations

impl DiagCtxtInner

pub(crate) fn new(emitter: Box<DynEmitter>) -> Self

pub(crate) fn emit_stashed_diagnostics(&mut self) -> Option<ErrorGuaranteed>

Emit all stashed diagnostics.

pub(crate) fn emit_diagnostic( &mut self, diagnostic: DiagInner, taint: Option<&Cell<Option<ErrorGuaranteed>>>, ) -> Option<ErrorGuaranteed>

pub(crate) fn treat_err_as_bug(&self) -> bool

pub(crate) fn treat_next_err_as_bug(&self) -> bool

pub(crate) fn has_errors_excluding_lint_errors(&self) -> Option<ErrorGuaranteed>

pub(crate) fn has_errors(&self) -> Option<ErrorGuaranteed>

pub(crate) fn has_errors_or_delayed_bugs(&self) -> Option<ErrorGuaranteed>

pub(crate) fn eagerly_translate<'a>( &self, message: DiagMessage, args: impl Iterator<Item = DiagArg<'a>>, ) -> SubdiagMessage

Translate message eagerly with args to SubdiagMessage::Eager.

pub(crate) fn eagerly_translate_to_string<'a>( &self, message: DiagMessage, args: impl Iterator<Item = DiagArg<'a>>, ) -> String

Translate message eagerly with args to String.

pub(crate) fn eagerly_translate_for_subdiag( &self, diag: &DiagInner, msg: impl Into<SubdiagMessage>, ) -> SubdiagMessage

pub(crate) fn flush_delayed(&mut self)

pub(crate) fn panic_if_treat_err_as_bug(&self)

Trait Implementations

impl Drop for DiagCtxtInner

fn drop(&mut self)

Executes the destructor for this type.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 456 bytes