[−][src]Enum rustc_mir::interpret::operand::Value
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A Value
represents a single immediate self-contained Rust value.
For optimization of a few very common cases, there is also a representation for a pair of
primitive values (ScalarPair
). It allows Miri to avoid making allocations for checked binary
operations and fat pointers. This idea was taken from rustc's codegen.
In particular, thanks to ScalarPair
, arithmetic operations and casts can be entirely
defined on Value
, and do not have to work with a Place
.
Variants
Scalar(ScalarMaybeUndef<Id>)
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ScalarPair(ScalarMaybeUndef<Id>, ScalarMaybeUndef<Id>)
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Methods
impl<'tcx> Value
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impl<'tcx> Value
pub fn new_slice(
val: Scalar,
len: u64,
cx: impl HasDataLayout
) -> Self
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pub fn new_slice(
val: Scalar,
len: u64,
cx: impl HasDataLayout
) -> Self
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pub fn new_dyn_trait(val: Scalar, vtable: Pointer) -> Self
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pub fn new_dyn_trait(val: Scalar, vtable: Pointer) -> Self
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pub fn to_scalar_or_undef(self) -> ScalarMaybeUndef
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pub fn to_scalar_or_undef(self) -> ScalarMaybeUndef
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pub fn to_scalar(self) -> EvalResult<'tcx, Scalar>
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pub fn to_scalar(self) -> EvalResult<'tcx, Scalar>
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pub fn to_scalar_pair(self) -> EvalResult<'tcx, (Scalar, Scalar)>
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pub fn to_scalar_pair(self) -> EvalResult<'tcx, (Scalar, Scalar)>
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pub fn to_scalar_ptr(self) -> EvalResult<'tcx, Scalar>
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pub fn to_scalar_ptr(self) -> EvalResult<'tcx, Scalar>
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Convert the value into a pointer (or a pointer-sized integer). Throws away the second half of a ScalarPair!
Trait Implementations
impl<Id: Copy> Copy for Value<Id>
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impl<Id: Copy> Copy for Value<Id>
impl<Id: Clone> Clone for Value<Id>
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impl<Id: Clone> Clone for Value<Id>
fn clone(&self) -> Value<Id>
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fn clone(&self) -> Value<Id>
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
impl<Id: Debug> Debug for Value<Id>
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impl<Id: Debug> Debug for Value<Id>
fn fmt(&self, f: &mut Formatter) -> Result
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fn fmt(&self, f: &mut Formatter) -> Result
Formats the value using the given formatter. Read more
impl<Id: Hash> Hash for Value<Id>
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impl<Id: Hash> Hash for Value<Id>
fn hash<__HId: Hasher>(&self, state: &mut __HId)
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fn hash<__HId: Hasher>(&self, state: &mut __HId)
Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more
impl<Id: PartialEq> PartialEq for Value<Id>
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impl<Id: PartialEq> PartialEq for Value<Id>
fn eq(&self, other: &Value<Id>) -> bool
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fn eq(&self, other: &Value<Id>) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, other: &Value<Id>) -> bool
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fn ne(&self, other: &Value<Id>) -> bool
This method tests for !=
.
impl<Id: Eq> Eq for Value<Id>
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impl<Id: Eq> Eq for Value<Id>
fn assert_receiver_is_total_eq(&self)
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fn assert_receiver_is_total_eq(&self)
impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for Value
impl<'a, 'tcx> HashStable<StableHashingContext<'a>> for Value
fn hash_stable<W: StableHasherResult>(
&self,
__ctx: &mut StableHashingContext<'a>,
__hasher: &mut StableHasher<W>
)
fn hash_stable<W: StableHasherResult>(
&self,
__ctx: &mut StableHashingContext<'a>,
__hasher: &mut StableHasher<W>
)
🔬 This is a nightly-only experimental API. (rustc_private
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impl<'a, Ctx> Snapshot<'a, Ctx> for Value where
Ctx: SnapshotContext<'a>,
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impl<'a, Ctx> Snapshot<'a, Ctx> for Value where
Ctx: SnapshotContext<'a>,
type Item = Value<AllocIdSnapshot<'a>>
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fn snapshot(&self, __ctx: &'a Ctx) -> Self::Item
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fn snapshot(&self, __ctx: &'a Ctx) -> Self::Item
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Auto Trait Implementations
Blanket Implementations
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
type Owned = T
fn to_owned(&self) -> T
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fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)
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fn clone_into(&self, target: &mut T)
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<T> From for T
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impl<T> From for T
impl<T, U> Into for T where
U: From<T>,
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impl<T, U> Into for T where
U: From<T>,
impl<T, U> TryFrom for T where
T: From<U>,
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impl<T, U> TryFrom for T where
T: From<U>,
type Error = !
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
try_from
)Performs the conversion.
impl<T> Borrow for T where
T: ?Sized,
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impl<T> Borrow for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow(&self) -> &T
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fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
impl<T, U> TryInto for T where
U: TryFrom<T>,
[src]
impl<T, U> TryInto for T where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
try_from
)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
[src]
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
try_from
)Performs the conversion.
impl<T> BorrowMut for T where
T: ?Sized,
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impl<T> BorrowMut for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow_mut(&mut self) -> &mut T
[src]
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&self) -> TypeId
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fn get_type_id(&self) -> TypeId
🔬 This is a nightly-only experimental API. (get_type_id
)
this method will likely be replaced by an associated static
Gets the TypeId
of self
. Read more
impl<E> SpecializationError for E
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impl<E> SpecializationError for E
fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
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fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
🔬 This is a nightly-only experimental API. (rustc_private
)
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instead?
Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S
is the encoder/decoder state type, T
is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more
impl<T> Erased for T
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impl<T> Erased for T
impl<T> Send for T where
T: ?Sized,
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impl<T> Send for T where
T: ?Sized,
impl<T> Sync for T where
T: ?Sized,
[src]
impl<T> Sync for T where
T: ?Sized,
impl<T> Erased for T
impl<T> Erased for T
impl<T> MaybeResult for T
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impl<T> MaybeResult for T
fn from_ok(x: T) -> T
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fn from_ok(x: T) -> T
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fn map_same<F>(self, f: F) -> T where
F: FnOnce(T) -> T,
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fn map_same<F>(self, f: F) -> T where
F: FnOnce(T) -> T,
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impl<'a, T> Captures for T where
T: ?Sized,
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impl<'a, T> Captures for T where
T: ?Sized,