rustc_mir_build::build::expr::as_place

Struct PlaceBuilder

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pub(in build) struct PlaceBuilder<'tcx> {
    base: PlaceBase,
    projection: Vec<PlaceElem<'tcx>>,
}
Expand description

PlaceBuilder is used to create places during MIR construction. It allows you to “build up” a place by pushing more and more projections onto the end, and then convert the final set into a place using the to_place method.

This is used internally when building a place for an expression like a.b.c. The fields b and c can be progressively pushed onto the place builder that is created when converting a.

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§base: PlaceBase§projection: Vec<PlaceElem<'tcx>>

Implementations§

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impl<'tcx> PlaceBuilder<'tcx>

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pub(in build) fn to_place( &self, cx: &Builder<'_, 'tcx>, ) -> Place<'tcx>

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pub(in build) fn try_to_place( &self, cx: &Builder<'_, 'tcx>, ) -> Option<Place<'tcx>>

Creates a Place or returns None if an upvar cannot be resolved

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pub(in build) fn resolve_upvar( &self, cx: &Builder<'_, 'tcx>, ) -> Option<PlaceBuilder<'tcx>>

Attempts to resolve the PlaceBuilder. Returns None if this is not an upvar.

Upvars resolve may fail for a PlaceBuilder when attempting to resolve a disjoint field whose root variable is not captured (destructured assignments) or when attempting to resolve a root variable (discriminant matching with only wildcard arm) that is not captured. This can happen because the final mir that will be generated doesn’t require a read for this place. Failures will only happen inside closures.

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pub(crate) fn base(&self) -> PlaceBase

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pub(crate) fn projection(&self) -> &[PlaceElem<'tcx>]

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pub(crate) fn field(self, f: FieldIdx, ty: Ty<'tcx>) -> Self

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pub(crate) fn deref(self) -> Self

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pub(crate) fn downcast( self, adt_def: AdtDef<'tcx>, variant_index: VariantIdx, ) -> Self

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fn index(self, index: Local) -> Self

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pub(crate) fn project(self, elem: PlaceElem<'tcx>) -> Self

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pub(crate) fn clone_project(&self, elem: PlaceElem<'tcx>) -> Self

Same as .clone().project(..) but more efficient

Trait Implementations§

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impl<'tcx> Clone for PlaceBuilder<'tcx>

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fn clone(&self) -> PlaceBuilder<'tcx>

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<'tcx> Debug for PlaceBuilder<'tcx>

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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<'tcx> From<Local> for PlaceBuilder<'tcx>

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fn from(local: Local) -> Self

Converts to this type from the input type.
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impl<'tcx> From<Place<'tcx>> for PlaceBuilder<'tcx>

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fn from(p: Place<'tcx>) -> Self

Converts to this type from the input type.
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impl<'tcx> From<PlaceBase> for PlaceBuilder<'tcx>

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fn from(base: PlaceBase) -> Self

Converts to this type from the input type.
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impl<'tcx> PartialEq for PlaceBuilder<'tcx>

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fn eq(&self, other: &PlaceBuilder<'tcx>) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<'tcx> StructuralPartialEq for PlaceBuilder<'tcx>

Auto Trait Implementations§

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impl<'tcx> DynSend for PlaceBuilder<'tcx>

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impl<'tcx> DynSync for PlaceBuilder<'tcx>

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impl<'tcx> Freeze for PlaceBuilder<'tcx>

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impl<'tcx> !RefUnwindSafe for PlaceBuilder<'tcx>

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impl<'tcx> Send for PlaceBuilder<'tcx>

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impl<'tcx> Sync for PlaceBuilder<'tcx>

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impl<'tcx> Unpin for PlaceBuilder<'tcx>

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impl<'tcx> !UnwindSafe for PlaceBuilder<'tcx>

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<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<P> IntoQueryParam<P> for P

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impl<T> MaybeResult<T> for T

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type Error = !

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fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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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

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unsafe fn drop(ptr: usize)

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impl<T> Same for T

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type Output = T

Should always be Self
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where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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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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where U: TryFrom<T>,

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

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Performs the conversion.
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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<Tcx, T> Value<Tcx> for T
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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T

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

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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: 40 bytes