Enum rustc_errors::Level

source ·
pub enum Level {
Show 13 variants Bug, Fatal, Error, DelayedBug, ForceWarning(Option<LintExpectationId>), Warning, Note, OnceNote, Help, OnceHelp, FailureNote, Allow, Expect(LintExpectationId),
}
Expand description

Level is_error EmissionGuarantee Top-level Sub Used in lints?


Bug yes BugAbort yes - - Fatal yes FatalAbort/FatalError(*) yes - - Error yes ErrorGuaranteed yes - yes DelayedBug yes ErrorGuaranteed yes - - ForceWarning - () yes - lint-only Warning - () yes yes yes Note - () rare yes - OnceNote - () - yes lint-only Help - () rare yes - OnceHelp - () - yes lint-only FailureNote - () rare - - Allow - () yes - lint-only Expect - () yes - lint-only

(*) FatalAbort normally, FatalError in the non-aborting “almost fatal” case that is occasionally used.

Variants§

§

Bug

For bugs in the compiler. Manifests as an ICE (internal compiler error) panic.

§

Fatal

An error that causes an immediate abort. Used for things like configuration errors, internal overflows, some file operation errors.

§

Error

An error in the code being compiled, which prevents compilation from finishing. This is the most common case.

§

DelayedBug

This is a strange one: lets you register an error without emitting it. If compilation ends without any other errors occurring, this will be emitted as a bug. Otherwise, it will be silently dropped. I.e. “expect other errors are emitted” semantics. Useful on code paths that should only be reached when compiling erroneous code.

§

ForceWarning(Option<LintExpectationId>)

A force-warn lint warning about the code being compiled. Does not prevent compilation from finishing.

The LintExpectationId is used for expected lint diagnostics. In all other cases this should be None.

§

Warning

A warning about the code being compiled. Does not prevent compilation from finishing. Will be skipped if can_emit_warnings is false.

§

Note

A message giving additional context.

§

OnceNote

A note that is only emitted once.

§

Help

A message suggesting how to fix something.

§

OnceHelp

A help that is only emitted once.

§

FailureNote

Similar to Note, but used in cases where compilation has failed. When printed for human consumption, it doesn’t have any kind of note: label.

§

Allow

Only used for lints.

§

Expect(LintExpectationId)

Only used for lints.

Implementations§

source§

impl Level

source

pub(crate) fn color(self) -> ColorSpec

source

pub fn to_str(self) -> &'static str

source

pub fn is_failure_note(&self) -> bool

source

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

Trait Implementations§

source§

impl Clone for Level

source§

fn clone(&self) -> Level

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
source§

impl Debug for Level

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
source§

impl<__D: SpanDecoder> Decodable<__D> for Level

source§

fn decode(__decoder: &mut __D) -> Self

source§

impl Display for Level

source§

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
source§

impl<__E: SpanEncoder> Encodable<__E> for Level

source§

fn encode(&self, __encoder: &mut __E)

source§

impl Hash for Level

source§

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
source§

impl IntoDiagArg for Level

source§

impl PartialEq for Level

source§

fn eq(&self, other: &Level) -> bool

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
source§

impl Copy for Level

source§

impl Eq for Level

source§

impl StructuralPartialEq for Level

Auto Trait Implementations§

§

impl DynSend for Level

§

impl DynSync for Level

§

impl Freeze for Level

§

impl RefUnwindSafe for Level

§

impl Send for Level

§

impl Sync for Level

§

impl Unpin for Level

§

impl UnwindSafe for Level

Blanket Implementations§

source§

impl<T> Aligned for T

source§

const ALIGN: Alignment = _

Alignment of Self.
source§

impl<T> Any for T
where T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> AnyEq for T
where T: Any + PartialEq,

source§

fn equals(&self, other: &(dyn Any + 'static)) -> bool

source§

fn as_any(&self) -> &(dyn Any + 'static)

source§

impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

source§

fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T

source§

fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]

source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T, R> CollectAndApply<T, R> for T

source§

fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

§

type Output = R

source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
source§

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

source§

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
source§

impl<T> Filterable for T

source§

fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> Instrument for T

source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T> Pointable for T

source§

const ALIGN: usize = _

The alignment of pointer.
§

type Init = T

The type for initializers.
source§

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
source§

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
source§

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
source§

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

impl<T> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<T> ToString for T
where T: Display + ?Sized,

source§

default fn to_string(&self) -> String

Converts the given value to a String. Read more
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

source§

fn vzip(self) -> V

source§

impl<T> WithSubscriber for T

source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

impl<'a, T> Captures<'a> for T
where T: ?Sized,

source§

impl<T> ErasedDestructor for T
where T: 'static,

source§

impl<T> MaybeSendSync for T
where T: Send + Sync,

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: 24 bytes

Size for each variant:

  • Bug: 0 bytes
  • Fatal: 0 bytes
  • Error: 0 bytes
  • DelayedBug: 0 bytes
  • ForceWarning: 20 bytes
  • Warning: 0 bytes
  • Note: 0 bytes
  • OnceNote: 0 bytes
  • Help: 0 bytes
  • OnceHelp: 0 bytes
  • FailureNote: 0 bytes
  • Allow: 0 bytes
  • Expect: 20 bytes