Struct syntax::diagnostics::plugin::Handler

pub struct Handler {
    pub flags: HandlerFlags,
    err_count: AtomicUsize,
    emitter: Lock<Box<Emitter + 'static + Send>>,
    continue_after_error: LockCell<bool>,
    delayed_span_bugs: Lock<Vec<Diagnostic>>,
    taught_diagnostics: Lock<HashSet<DiagnosticId, BuildHasherDefault<FxHasher>>>,
    emitted_diagnostic_codes: Lock<HashSet<DiagnosticId, BuildHasherDefault<FxHasher>>>,
    emitted_diagnostics: Lock<HashSet<u128, BuildHasherDefault<FxHasher>>>,
}

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A handler deals with errors; certain errors (fatal, bug, unimpl) may cause immediate exit, others log errors for later reporting.

Fields

flags: HandlerFlags

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err_count: AtomicUsize

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emitter: Lock<Box<Emitter + 'static + Send>>

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continue_after_error: LockCell<bool>

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delayed_span_bugs: Lock<Vec<Diagnostic>>

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taught_diagnostics: Lock<HashSet<DiagnosticId, BuildHasherDefault<FxHasher>>>

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emitted_diagnostic_codes: Lock<HashSet<DiagnosticId, BuildHasherDefault<FxHasher>>>

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Used to suggest rustc --explain

emitted_diagnostics: Lock<HashSet<u128, BuildHasherDefault<FxHasher>>>

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Methods

impl Handler

pub fn with_tty_emitter(     color_config: ColorConfig,     can_emit_warnings: bool,     treat_err_as_bug: bool,     cm: Option<Rc<CodeMapper + 'static + Send + Sync>> ) -> Handler

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pub fn with_tty_emitter_and_flags(     color_config: ColorConfig,     cm: Option<Rc<CodeMapper + 'static + Send + Sync>>,     flags: HandlerFlags ) -> Handler

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pub fn with_emitter(     can_emit_warnings: bool,     treat_err_as_bug: bool,     e: Box<Emitter + 'static + Send> ) -> Handler

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pub fn with_emitter_and_flags(     e: Box<Emitter + 'static + Send>,     flags: HandlerFlags ) -> Handler

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pub fn set_continue_after_error(&self, continue_after_error: bool)

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pub fn reset_err_count(&self)

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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 struct_dummy(&'a self) -> DiagnosticBuilder<'a>

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pub fn struct_span_warn<S>(&'a self, sp: S, msg: &str) -> DiagnosticBuilder<'a> where     S: Into<MultiSpan>,

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pub fn struct_span_warn_with_code<S>(     &'a self,     sp: S,     msg: &str,     code: DiagnosticId ) -> DiagnosticBuilder<'a> where     S: Into<MultiSpan>,

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pub fn struct_warn(&'a self, msg: &str) -> DiagnosticBuilder<'a>

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pub fn struct_span_err<S>(&'a self, sp: S, msg: &str) -> DiagnosticBuilder<'a> where     S: Into<MultiSpan>,

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pub fn struct_span_err_with_code<S>(     &'a self,     sp: S,     msg: &str,     code: DiagnosticId ) -> DiagnosticBuilder<'a> where     S: Into<MultiSpan>,

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pub fn struct_err(&'a self, msg: &str) -> DiagnosticBuilder<'a>

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pub fn struct_err_with_code(     &'a self,     msg: &str,     code: DiagnosticId ) -> DiagnosticBuilder<'a>

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pub fn struct_span_fatal<S>(&'a self, sp: S, msg: &str) -> DiagnosticBuilder<'a> where     S: Into<MultiSpan>,

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pub fn struct_span_fatal_with_code<S>(     &'a self,     sp: S,     msg: &str,     code: DiagnosticId ) -> DiagnosticBuilder<'a> where     S: Into<MultiSpan>,

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pub fn struct_fatal(&'a self, msg: &str) -> DiagnosticBuilder<'a>

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pub fn cancel(&self, err: &mut DiagnosticBuilder)

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pub fn span_fatal<S>(&self, sp: S, msg: &str) -> FatalError where     S: Into<MultiSpan>,

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pub fn span_fatal_with_code<S>(     &self,     sp: S,     msg: &str,     code: DiagnosticId ) -> FatalError where     S: Into<MultiSpan>,

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pub fn span_err<S>(&self, sp: S, msg: &str) where     S: Into<MultiSpan>,

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pub fn mut_span_err<S>(&'a self, sp: S, msg: &str) -> DiagnosticBuilder<'a> where     S: Into<MultiSpan>,

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pub fn span_err_with_code<S>(&self, sp: S, msg: &str, code: DiagnosticId) where     S: Into<MultiSpan>,

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pub fn span_warn<S>(&self, sp: S, msg: &str) where     S: Into<MultiSpan>,

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pub fn span_warn_with_code<S>(&self, sp: S, msg: &str, code: DiagnosticId) where     S: Into<MultiSpan>,

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pub fn span_bug<S>(&self, sp: S, msg: &str) -> ! where     S: Into<MultiSpan>,

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pub fn delay_span_bug<S>(&self, sp: S, msg: &str) where     S: Into<MultiSpan>,

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pub fn span_bug_no_panic<S>(&self, sp: S, msg: &str) where     S: Into<MultiSpan>,

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pub fn span_note_without_error<S>(&self, sp: S, msg: &str) where     S: Into<MultiSpan>,

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pub fn span_note_diag(&'a self, sp: Span, msg: &str) -> DiagnosticBuilder<'a>

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pub fn span_unimpl<S>(&self, sp: S, msg: &str) -> ! where     S: Into<MultiSpan>,

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pub fn failure(&self, msg: &str)

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pub fn fatal(&self, msg: &str) -> FatalError

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pub fn err(&self, msg: &str)

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pub fn warn(&self, msg: &str)

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pub fn note_without_error(&self, msg: &str)

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pub fn bug(&self, msg: &str) -> !

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pub fn unimpl(&self, msg: &str) -> !

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pub fn err_count(&self) -> usize

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pub fn has_errors(&self) -> bool

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pub fn print_error_count(&self)

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pub fn abort_if_errors(&self)

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pub fn emit(&self, msp: &MultiSpan, msg: &str, lvl: Level)

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pub fn emit_with_code(     &self,     msp: &MultiSpan,     msg: &str,     code: DiagnosticId,     lvl: Level )

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

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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_db(&self, db: DiagnosticBuilder)

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Trait Implementations

impl Drop for Handler

fn drop(&mut self)

Executes the destructor for this type.