struct CollectTrackerAndEmitter<'a, 'cx, 'matcher> {
    cx: &'a mut ExtCtxt<'cx>,
    remaining_matcher: Option<&'matcher MatcherLoc>,
    best_failure: Option<BestFailure>,
    root_span: Span,
    result: Option<Box<dyn MacResult + 'cx>>,
}
Expand description

The tracker used for the slow error path that collects useful info for diagnostics.

Fields§

§cx: &'a mut ExtCtxt<'cx>§remaining_matcher: Option<&'matcher MatcherLoc>§best_failure: Option<BestFailure>

Which arm’s failure should we report? (the one furthest along)

§root_span: Span§result: Option<Box<dyn MacResult + 'cx>>

Implementations§

source§

impl<'a, 'cx> CollectTrackerAndEmitter<'a, 'cx, '_>

source

fn new(cx: &'a mut ExtCtxt<'cx>, root_span: Span) -> Self

Trait Implementations§

source§

impl<'a, 'cx, 'matcher> Tracker<'matcher> for CollectTrackerAndEmitter<'a, 'cx, 'matcher>

§

type Failure = (Token, usize, &'static str)

The contents of ParseResult::Failure.
source§

fn build_failure( tok: Token, position: usize, msg: &'static str, ) -> Self::Failure

Arm failed to match. If the token is token::Eof, it indicates an unexpected end of macro invocation. Otherwise, it indicates that no rules expected the given token. The usize is the approximate position of the token in the input token stream.
source§

fn before_match_loc(&mut self, parser: &TtParser, matcher: &'matcher MatcherLoc)

This is called before trying to match next MatcherLoc on the current token.
source§

fn after_arm( &mut self, result: &ParseResult<FxHashMap<MacroRulesNormalizedIdent, NamedMatch>, Self::Failure>, )

This is called after an arm has been parsed, either successfully or unsuccessfully. When this is called, before_match_loc was called at least once (with a MatcherLoc::Eof).
source§

fn description() -> &'static str

For tracing.
source§

fn recovery() -> Recovery

source§

fn set_expected_token(&mut self, _tok: &'matcher Token)

source§

fn get_expected_token(&self) -> Option<&'matcher Token>

Auto Trait Implementations§

§

impl<'a, 'cx, 'matcher> !DynSend for CollectTrackerAndEmitter<'a, 'cx, 'matcher>

§

impl<'a, 'cx, 'matcher> !DynSync for CollectTrackerAndEmitter<'a, 'cx, 'matcher>

§

impl<'a, 'cx, 'matcher> Freeze for CollectTrackerAndEmitter<'a, 'cx, 'matcher>

§

impl<'a, 'cx, 'matcher> !RefUnwindSafe for CollectTrackerAndEmitter<'a, 'cx, 'matcher>

§

impl<'a, 'cx, 'matcher> !Send for CollectTrackerAndEmitter<'a, 'cx, 'matcher>

§

impl<'a, 'cx, 'matcher> !Sync for CollectTrackerAndEmitter<'a, 'cx, 'matcher>

§

impl<'a, 'cx, 'matcher> Unpin for CollectTrackerAndEmitter<'a, 'cx, 'matcher>

§

impl<'a, 'cx, 'matcher> !UnwindSafe for CollectTrackerAndEmitter<'a, 'cx, 'matcher>

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> 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<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> IntoEither for T

source§

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
source§

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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, 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<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

source§

fn upcast(self, interner: I) -> U

source§

impl<I, T> UpcastFrom<I, T> for T

source§

fn upcast_from(from: T, _tcx: I) -> T

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,

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: 128 bytes