Enum rustc_middle::mir::Rvalue

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

Rvalues

Variants

Use(Operand<'tcx>)

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

Repeat(Operand<'tcx>, &'tcx Const<'tcx>)

[x; 32]

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

&x or &mut x

ThreadLocalRef(DefId)

Accessing a thread local static. This is inherently a runtime operation, even if llvm treats it as an access to a static. This Rvalue yields a reference to the thread local static.

AddressOf(Mutability, Place<'tcx>)

Create a raw pointer to the given place Can be generated by raw address of expressions (&raw const x), or when casting a reference to a raw pointer.

Len(Place<'tcx>)

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

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

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

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

NullaryOp(NullOp, Ty<'tcx>)

UnaryOp(UnOp, Operand<'tcx>)

Discriminant(Place<'tcx>)

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>>)

Creates 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.

Implementations

impl<'tcx> Rvalue<'tcx>

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

pub fn initialization_state(&self) -> RvalueInitializationState

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

Trait Implementations

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

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

Returns a copy of the value.

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

Performs copy-assignment from source.

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

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<'tcx>> Decodable<__D> for Rvalue<'tcx>

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<'tcx, __E: TyEncoder<'tcx>> Encodable<__E> for Rvalue<'tcx>

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl<'tcx> Hash for Rvalue<'tcx>

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

Feeds this value into the given Hasher.

pub fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for Rvalue<'tcx>

fn hash_stable(
    &self,
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher
)

impl<'tcx> PartialEq<Rvalue<'tcx>> for Rvalue<'tcx>

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

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

fn ne(&self, other: &Rvalue<'tcx>) -> bool

This method tests for !=.

impl<'tcx> StructuralPartialEq for Rvalue<'tcx>

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

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

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

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

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

fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool

Returns true if self has any late-bound regions that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound regions that appear free.

fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool

Returns true if this self has any regions that escape binder (and hence are not bound by it).

fn has_escaping_bound_vars(&self) -> bool

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

fn has_projections(&self) -> bool

fn has_opaque_types(&self) -> bool

fn references_error(&self) -> bool

fn has_param_types_or_consts(&self) -> bool

fn has_infer_regions(&self) -> bool

fn has_infer_types(&self) -> bool

fn has_infer_types_or_consts(&self) -> bool

fn needs_infer(&self) -> bool

fn has_placeholders(&self) -> bool

fn needs_subst(&self) -> bool

fn has_free_regions(&self) -> bool

“Free” regions in this context means that it has any region that is not (a) erased or (b) late-bound.

fn has_erased_regions(&self) -> bool

fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

fn is_global(&self) -> bool

Indicates whether this value references only ‘global’ generic parameters that are the same regardless of what fn we are in. This is used for caching.

fn has_late_bound_regions(&self) -> bool

True if there are any late-bound regions

fn still_further_specializable(&self) -> bool

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization.