Enum rustc::mir::Rvalue

pub enum Rvalue<'tcx> {
    Use(Operand<'tcx>),
    Repeat(Operand<'tcx>, ConstUsize),
    Ref(Region<'tcx>, BorrowKind, Place<'tcx>),
    Len(Place<'tcx>),
    Cast(CastKind, Operand<'tcx>, Ty<'tcx>),
    BinaryOp(BinOp, Operand<'tcx>, Operand<'tcx>),
    CheckedBinaryOp(BinOp, Operand<'tcx>, Operand<'tcx>),
    NullaryOp(NullOp, Ty<'tcx>),
    UnaryOp(UnOp, Operand<'tcx>),
    Discriminant(Place<'tcx>),
    Aggregate(Box<AggregateKind<'tcx>>, Vec<Operand<'tcx>>),
}

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Rvalues

Variants

Use(Operand<'tcx>)

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x (either a move or copy, depending on type of x)

Repeat(Operand<'tcx>, ConstUsize)

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[x; 32]

Ref(Region<'tcx>, BorrowKind, Place<'tcx>)

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&x or &mut x

Len(Place<'tcx>)

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length of a [X] or [X;n] value

Cast(CastKind, Operand<'tcx>, Ty<'tcx>)

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BinaryOp(BinOp, Operand<'tcx>, Operand<'tcx>)

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CheckedBinaryOp(BinOp, Operand<'tcx>, Operand<'tcx>)

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NullaryOp(NullOp, Ty<'tcx>)

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UnaryOp(UnOp, Operand<'tcx>)

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Discriminant(Place<'tcx>)

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Read the discriminant of an ADT.

Undefined (i.e. no effort is made to make it defined, but there’s no reason why it cannot be defined to return, say, a 0) if ADT is not an enum.

Aggregate(Box<AggregateKind<'tcx>>, Vec<Operand<'tcx>>)

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Create an aggregate value, like a tuple or struct. This is only needed because we want to distinguish dest = Foo { x: ..., y: ... } from dest.x = ...; dest.y = ...; in the case that Foo has a destructor. These rvalues can be optimized away after type-checking and before lowering.

Methods

impl<'tcx> Rvalue<'tcx>

pub fn ty<'a, 'gcx, D>(
    &self,
    local_decls: &D,
    tcx: TyCtxt<'a, 'gcx, 'tcx>
) -> Ty<'tcx> where
    D: HasLocalDecls<'tcx>, 

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pub fn initialization_state(&self) -> RvalueInitializationState

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Returns whether this rvalue is deeply initialized (most rvalues) or whether its only shallowly initialized (Rvalue::Box).

Trait Implementations

impl<'gcx> HashStable<StableHashingContext<'gcx>> for Rvalue<'gcx>

fn hash_stable<W: StableHasherResult>(
    &self,
    hcx: &mut StableHashingContext<'gcx>,
    hasher: &mut StableHasher<W>
)

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impl<'tcx> Clone for Rvalue<'tcx>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Encodable for Rvalue<'tcx>

fn encode<__S: Encoder>(&self, __arg_0: &mut __S) -> Result<(), __S::Error>

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impl<'tcx> Decodable for Rvalue<'tcx>

fn decode<__D: Decoder>(__arg_0: &mut __D) -> Result<Rvalue<'tcx>, __D::Error>

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impl<'tcx> Debug for Rvalue<'tcx>

fn fmt(&self, fmt: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<'tcx> TypeFoldable<'tcx> for Rvalue<'tcx>

fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
    &self,
    folder: &mut F
) -> Self

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fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool

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fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(
    &self,
    folder: &mut F
) -> Self

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fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool

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fn has_regions_escaping_depth(&self, depth: u32) -> bool

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fn has_escaping_regions(&self) -> bool

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fn has_type_flags(&self, flags: TypeFlags) -> bool

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fn has_projections(&self) -> bool

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fn references_error(&self) -> bool

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fn has_param_types(&self) -> bool

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fn has_self_ty(&self) -> bool

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fn has_infer_types(&self) -> bool

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fn needs_infer(&self) -> bool

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fn needs_subst(&self) -> bool

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fn has_re_skol(&self) -> bool

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fn has_closure_types(&self) -> bool

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fn has_erasable_regions(&self) -> bool

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fn is_normalized_for_trans(&self) -> bool

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fn is_global(&self) -> bool

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Indicates whether this value references only 'global' types/lifetimes that are the same regardless of what fn we are in. This is used for caching. Errs on the side of returning false.