Enum rustc_middle::mir::Rvalue[][src]

pub enum Rvalue<'tcx> {
Show 14 variants Use(Operand<'tcx>), Repeat(Operand<'tcx>, &'tcx Const<'tcx>), Ref(Region<'tcx>, BorrowKindPlace<'tcx>), ThreadLocalRef(DefId), AddressOf(MutabilityPlace<'tcx>), Len(Place<'tcx>), Cast(CastKindOperand<'tcx>, Ty<'tcx>), BinaryOp(BinOpBox<(Operand<'tcx>, Operand<'tcx>)>), CheckedBinaryOp(BinOpBox<(Operand<'tcx>, Operand<'tcx>)>), NullaryOp(NullOpTy<'tcx>), UnaryOp(UnOpOperand<'tcx>), Discriminant(Place<'tcx>), Aggregate(Box<AggregateKind<'tcx>>, Vec<Operand<'tcx>>), ShallowInitBox(Operand<'tcx>, Ty<'tcx>),
}
Expand description

Rvalues

Variants

Use(Operand<'tcx>)

Tuple Fields

0: Operand<'tcx>

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

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

Tuple Fields

0: Operand<'tcx>
1: &'tcx Const<'tcx>

[x; 32]

Ref(Region<'tcx>, BorrowKindPlace<'tcx>)

Tuple Fields

0: Region<'tcx>
2: Place<'tcx>

&x or &mut x

ThreadLocalRef(DefId)

Tuple Fields

0: 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(MutabilityPlace<'tcx>)

Tuple Fields

1: 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>)

Tuple Fields

0: Place<'tcx>

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

Cast(CastKindOperand<'tcx>, Ty<'tcx>)

Tuple Fields

1: Operand<'tcx>
2: Ty<'tcx>

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

Tuple Fields

0: BinOp
1: Box<(Operand<'tcx>, Operand<'tcx>)>

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

Tuple Fields

0: BinOp
1: Box<(Operand<'tcx>, Operand<'tcx>)>

NullaryOp(NullOpTy<'tcx>)

Tuple Fields

0: NullOp
1: Ty<'tcx>

UnaryOp(UnOpOperand<'tcx>)

Tuple Fields

0: UnOp
1: Operand<'tcx>

Discriminant(Place<'tcx>)

Tuple Fields

0: 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>>)

Tuple Fields

0: Box<AggregateKind<'tcx>>
1: 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.

ShallowInitBox(Operand<'tcx>, Ty<'tcx>)

Tuple Fields

0: Operand<'tcx>
1: Ty<'tcx>

Transmutes a *mut u8 into shallow-initialized Box<T>.

This is different a normal transmute because dataflow analysis will treat the box as initialized but its content as uninitialized.

Implementations

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

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

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

This method tests for !=.

Consumers may find this more convenient to use with infallible folders than try_super_fold_with, to which the provided default definition delegates. Implementors should not override this provided default definition, to ensure that the two methods are coherent (provide a definition of try_super_fold_with instead). Read more

Consumers may find this more convenient to use with infallible folders than try_fold_with, to which the provided default definition delegates. Implementors should not override this provided default definition, to ensure that the two methods are coherent (provide a definition of try_fold_with instead). Read more

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. Read more

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

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

True if there are any un-erased free regions.

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

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. Read more

True if there are any late-bound regions

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. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don’t need to if the corresponding DepNode is anonymous). Read more

This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes during red-green evaluation. The query system will only call this method if fingerprint_style() is not FingerprintStyle::Opaque. It is always valid to return None here, in which case incremental compilation will treat the query as having changed instead of forcing it. Read more

Performs the conversion.

Performs the conversion.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

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: 40 bytes

Size for each variant:

  • Use: 31 bytes
  • Repeat: 39 bytes
  • Ref: 31 bytes
  • ThreadLocalRef: 11 bytes
  • AddressOf: 23 bytes
  • Len: 23 bytes
  • Cast: 39 bytes
  • BinaryOp: 15 bytes
  • CheckedBinaryOp: 15 bytes
  • NullaryOp: 15 bytes
  • UnaryOp: 31 bytes
  • Discriminant: 23 bytes
  • Aggregate: 39 bytes
  • ShallowInitBox: 39 bytes