pub struct MultiSpan {
    pub(crate) primary_spans: Vec<Span>,
    pub(crate) span_labels: Vec<(Span, DiagnosticMessage)>,
}
Expand description

A collection of Spans.

Spans have two orthogonal attributes:

  • They can be primary spans. In this case they are the locus of the error, and would be rendered with ^^^.
  • They can have a label. In this case, the label is written next to the mark in the snippet when we render.

Fields§

§primary_spans: Vec<Span>§span_labels: Vec<(Span, DiagnosticMessage)>

Implementations§

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impl MultiSpan

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pub fn new() -> MultiSpan

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pub fn from_span(primary_span: Span) -> MultiSpan

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pub fn from_spans(vec: Vec<Span>) -> MultiSpan

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pub fn push_span_label( &mut self, span: Span, label: impl Into<DiagnosticMessage> )

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pub fn primary_span(&self) -> Option<Span>

Selects the first primary span (if any).

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pub fn primary_spans(&self) -> &[Span]

Returns all primary spans.

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pub fn has_primary_spans(&self) -> bool

Returns true if any of the primary spans are displayable.

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pub fn is_dummy(&self) -> bool

Returns true if this contains only a dummy primary span with any hygienic context.

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pub fn replace(&mut self, before: Span, after: Span) -> bool

Replaces all occurrences of one Span with another. Used to move Spans in areas that don’t display well (like std macros). Returns whether replacements occurred.

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pub fn pop_span_label(&mut self) -> Option<(Span, DiagnosticMessage)>

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pub fn span_labels(&self) -> Vec<SpanLabel>

Returns the strings to highlight. We always ensure that there is an entry for each of the primary spans – for each primary span P, if there is at least one label with span P, we return those labels (marked as primary). But otherwise we return SpanLabel instances with empty labels.

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pub fn has_span_labels(&self) -> bool

Returns true if any of the span labels is displayable.

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pub fn clone_ignoring_labels(&self) -> Self

Clone this MultiSpan without keeping any of the span labels - sometimes a MultiSpan is to be re-used in another diagnostic, but includes span_labels which have translated messages. These translated messages would fail to translate without their diagnostic arguments which are unlikely to be cloned alongside the Span.

Trait Implementations§

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impl Clone for MultiSpan

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fn clone(&self) -> MultiSpan

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for MultiSpan

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

Formats the value using the given formatter. Read more
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impl<__D: SpanDecoder> Decodable<__D> for MultiSpan

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

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

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

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impl From<Span> for MultiSpan

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fn from(span: Span) -> MultiSpan

Converts to this type from the input type.
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impl From<Vec<Span>> for MultiSpan

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fn from(spans: Vec<Span>) -> MultiSpan

Converts to this type from the input type.
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impl Hash for MultiSpan

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

Feeds this value into the given Hasher. Read more
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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
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impl PartialEq for MultiSpan

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

This method tests for self and other values to be equal, and is used by ==.
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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.
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impl Eq for MultiSpan

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impl StructuralPartialEq for MultiSpan

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> AnyEq for T
where T: Any + PartialEq,

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

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

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

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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

Compare self to key and return true if they are equal.
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impl<T> Filterable for T

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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
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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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
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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

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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: 48 bytes