rustc_expand::base

Struct DummyResult

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pub struct DummyResult {
    guar: Option<ErrorGuaranteed>,
    span: Span,
}
Expand description

Fill-in macro expansion result, to allow compilation to continue after hitting errors.

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§guar: Option<ErrorGuaranteed>§span: Span

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impl DummyResult

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pub fn any(span: Span, guar: ErrorGuaranteed) -> Box<dyn MacResult + 'static>

Creates a default MacResult that can be anything.

Use this as a return value after hitting any errors and calling span_err.

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pub fn any_valid(span: Span) -> Box<dyn MacResult + 'static>

Same as any, but must be a valid fragment, not error.

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pub fn raw_expr(sp: Span, guar: Option<ErrorGuaranteed>) -> P<Expr>

A plain dummy expression.

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impl Clone for DummyResult

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fn clone(&self) -> DummyResult

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 MacResult for DummyResult

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fn make_expr(self: Box<DummyResult>) -> Option<P<Expr>>

Creates an expression.
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fn make_pat(self: Box<DummyResult>) -> Option<P<Pat>>

Creates a pattern.
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fn make_items(self: Box<DummyResult>) -> Option<SmallVec<[P<Item>; 1]>>

Creates zero or more items.
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fn make_impl_items( self: Box<DummyResult>, ) -> Option<SmallVec<[P<AssocItem>; 1]>>

Creates zero or more impl items.
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fn make_trait_items( self: Box<DummyResult>, ) -> Option<SmallVec<[P<AssocItem>; 1]>>

Creates zero or more trait items.
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fn make_foreign_items(self: Box<Self>) -> Option<SmallVec<[P<ForeignItem>; 1]>>

Creates zero or more items in an extern {} block
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fn make_stmts(self: Box<DummyResult>) -> Option<SmallVec<[Stmt; 1]>>

Creates zero or more statements. Read more
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fn make_ty(self: Box<DummyResult>) -> Option<P<Ty>>

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fn make_arms(self: Box<DummyResult>) -> Option<SmallVec<[Arm; 1]>>

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fn make_expr_fields(self: Box<DummyResult>) -> Option<SmallVec<[ExprField; 1]>>

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fn make_pat_fields(self: Box<DummyResult>) -> Option<SmallVec<[PatField; 1]>>

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fn make_generic_params( self: Box<DummyResult>, ) -> Option<SmallVec<[GenericParam; 1]>>

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fn make_params(self: Box<DummyResult>) -> Option<SmallVec<[Param; 1]>>

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fn make_field_defs(self: Box<DummyResult>) -> Option<SmallVec<[FieldDef; 1]>>

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fn make_variants(self: Box<DummyResult>) -> Option<SmallVec<[Variant; 1]>>

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fn make_crate(self: Box<DummyResult>) -> Option<Crate>

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impl Copy for DummyResult

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

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

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

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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<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T, R> CollectAndApply<T, R> for T

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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<_>>()).

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type Output = R

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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> IntoEither for T

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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
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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
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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<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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

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

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

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

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fn vzip(self) -> V

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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,

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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: 12 bytes