Struct rustc_errors::Handler

pub struct Handler {
    pub(crate) flags: HandlerFlags,
    pub(crate) inner: Lock<HandlerInner>,
}

A handler deals with errors and other compiler output. Certain errors (fatal, bug, unimpl) may cause immediate exit, others log errors for later reporting.

Fields

flags: HandlerFlags

inner: Lock<HandlerInner>

Implementations

impl Handler

pub fn with_tty_emitter(
    color_config: ColorConfig,
    can_emit_warnings: bool,
    treat_err_as_bug: Option<NonZeroUsize>,
    sm: Option<Lrc<SourceMap>>,
    fluent_bundle: Option<Lrc<FluentBundle>>,
    fallback_bundle: LazyFallbackBundle
) -> Self

pub fn with_tty_emitter_and_flags(
    color_config: ColorConfig,
    sm: Option<Lrc<SourceMap>>,
    fluent_bundle: Option<Lrc<FluentBundle>>,
    fallback_bundle: LazyFallbackBundle,
    flags: HandlerFlags
) -> Self

pub fn with_emitter(
    can_emit_warnings: bool,
    treat_err_as_bug: Option<NonZeroUsize>,
    emitter: Box<dyn Emitter + Send>
) -> Self

pub fn with_emitter_and_flags(
    emitter: Box<dyn Emitter + Send>,
    flags: HandlerFlags
) -> Self

pub fn can_emit_warnings(&self) -> bool

pub fn reset_err_count(&self)

Resets the diagnostic error count as well as the cached emitted diagnostics.

NOTE: do not call this function from rustc. It is only meant to be called from external tools that want to reuse a Parser cleaning the previously emitted diagnostics as well as the overall count of emitted error diagnostics.

pub fn stash_diagnostic(&self, span: Span, key: StashKey, diag: Diagnostic)

Stash a given diagnostic with the given Span and StashKey as the key for later stealing.

pub fn steal_diagnostic(
    &self,
    span: Span,
    key: StashKey
) -> Option<DiagnosticBuilder<'_, ()>>

Steal a previously stashed diagnostic with the given Span and StashKey as the key.

pub fn has_stashed_diagnostic(&self, span: Span, key: StashKey) -> bool

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

Emit all stashed diagnostics.

pub fn struct_diagnostic<G: EmissionGuarantee>(
    &self,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, G>

Construct a builder with the msg at the level appropriate for the specific EmissionGuarantee.

pub fn struct_span_warn(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Warning level at the given span and with the msg.

Attempting to .emit() the builder will only emit if either:

• can_emit_warnings is true
• is_force_warn was set in DiagnosticId::Lint

pub fn struct_span_warn_with_expectation(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>,
    id: LintExpectationId
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Warning level at the given span and with the msg. The id is used for lint emissions which should also fulfill a lint expectation.

Attempting to .emit() the builder will only emit if either:

• can_emit_warnings is true
• is_force_warn was set in DiagnosticId::Lint

pub fn struct_span_allow(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Allow level at the given span and with the msg.

pub fn struct_span_warn_with_code(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>,
    code: DiagnosticId
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Warning level at the given span and with the msg. Also include a code.

pub fn struct_warn(
    &self,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Warning level with the msg.

Attempting to .emit() the builder will only emit if either:

• can_emit_warnings is true
• is_force_warn was set in DiagnosticId::Lint

pub fn struct_warn_with_expectation(
    &self,
    msg: impl Into<DiagnosticMessage>,
    id: LintExpectationId
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Warning level with the msg. The id is used for lint emissions which should also fulfill a lint expectation.

Attempting to .emit() the builder will only emit if either:

• can_emit_warnings is true
• is_force_warn was set in DiagnosticId::Lint

pub fn struct_allow(
    &self,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Allow level with the msg.

pub fn struct_expect(
    &self,
    msg: impl Into<DiagnosticMessage>,
    id: LintExpectationId
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Expect level with the msg.

pub fn struct_span_err(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, ErrorGuaranteed>

Construct a builder at the Error level at the given span and with the msg.

pub fn struct_span_err_with_code(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>,
    code: DiagnosticId
) -> DiagnosticBuilder<'_, ErrorGuaranteed>

Construct a builder at the Error level at the given span, with the msg, and code.

pub fn struct_err(
    &self,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, ErrorGuaranteed>

Construct a builder at the Error level with the msg.

pub fn struct_err_with_code(
    &self,
    msg: impl Into<DiagnosticMessage>,
    code: DiagnosticId
) -> DiagnosticBuilder<'_, ErrorGuaranteed>

Construct a builder at the Error level with the msg and the code.

pub fn struct_warn_with_code(
    &self,
    msg: impl Into<DiagnosticMessage>,
    code: DiagnosticId
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Warn level with the msg and the code.

pub fn struct_span_fatal(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, !>

Construct a builder at the Fatal level at the given span and with the msg.

pub fn struct_span_fatal_with_code(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>,
    code: DiagnosticId
) -> DiagnosticBuilder<'_, !>

Construct a builder at the Fatal level at the given span, with the msg, and code.

pub fn struct_fatal(
    &self,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, !>

Construct a builder at the Error level with the msg.

pub fn struct_help(
    &self,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Help level with the msg.

pub fn struct_note_without_error(
    &self,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, ()>

Construct a builder at the Note level with the msg.

pub fn span_fatal(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
) -> !

pub fn span_fatal_with_code(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>,
    code: DiagnosticId
) -> !

pub fn span_err(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
) -> ErrorGuaranteed

pub fn span_err_with_code(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>,
    code: DiagnosticId
)

pub fn span_warn(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
)

pub fn span_warn_with_code(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>,
    code: DiagnosticId
)

pub fn span_bug(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
) -> !

pub fn delay_span_bug(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
) -> ErrorGuaranteed

pub fn delay_good_path_bug(&self, msg: impl Into<DiagnosticMessage>)

pub fn span_bug_no_panic(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
)

pub fn span_note_without_error(
    &self,
    span: impl Into<MultiSpan>,
    msg: impl Into<DiagnosticMessage>
)

pub fn span_note_diag(
    &self,
    span: Span,
    msg: impl Into<DiagnosticMessage>
) -> DiagnosticBuilder<'_, ()>

pub fn fatal(&self, msg: impl Into<DiagnosticMessage>) -> FatalError

pub fn err(&self, msg: impl Into<DiagnosticMessage>) -> ErrorGuaranteed

pub fn warn(&self, msg: impl Into<DiagnosticMessage>)

pub fn note_without_error(&self, msg: impl Into<DiagnosticMessage>)

pub fn bug(&self, msg: impl Into<DiagnosticMessage>) -> !

pub fn err_count(&self) -> usize

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

pub fn has_errors_or_lint_errors(&self) -> Option<ErrorGuaranteed>

pub fn has_errors_or_delayed_span_bugs(&self) -> bool

pub fn print_error_count(&self, registry: &Registry)

pub fn take_future_breakage_diagnostics(&self) -> Vec<Diagnostic>

pub fn abort_if_errors(&self)

pub fn must_teach(&self, code: &DiagnosticId) -> bool

true if we haven’t taught a diagnostic with this code already. The caller must then teach the user about such a diagnostic.

Used to suppress emitting the same error multiple times with extended explanation when calling -Zteach.

pub fn force_print_diagnostic(&self, db: Diagnostic)

pub fn emit_diagnostic(
    &self,
    diagnostic: &mut Diagnostic
) -> Option<ErrorGuaranteed>

pub(crate) fn emit_diag_at_span(
    &self,
    diag: Diagnostic,
    sp: impl Into<MultiSpan>
) -> Option<ErrorGuaranteed>

pub fn emit_artifact_notification(&self, path: &Path, artifact_type: &str)

pub fn emit_future_breakage_report(&self, diags: Vec<Diagnostic>)

pub fn emit_unused_externs(
    &self,
    lint_level: Level,
    loud: bool,
    unused_externs: &[&str]
)

pub fn update_unstable_expectation_id(
    &self,
    unstable_to_stable: &FxHashMap<LintExpectationId, LintExpectationId>
)

pub fn steal_fulfilled_expectation_ids(&self) -> FxHashSet<LintExpectationId>

This methods steals all LintExpectationIds that are stored inside HandlerInner and indicate that the linked expectation has been fulfilled.

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: 408 bytes