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Constant

shape_vm::bytecode

Enum Constant 

Source 
pub enum Constant {

Show 17 variants    Int(i64),
    UInt(u64),
    Number(f64),
    Decimal(Decimal),
    String(String),
    Char(char),
    Bool(bool),
    Null,
    Unit,
    Function(u16),
    Timeframe(Timeframe),
    Duration(Duration),
    TimeReference(TimeReference),
    DateTimeExpr(DateTimeExpr),
    DataDateTimeRef(DataDateTimeRef),
    TypeAnnotation(TypeAnnotation),
    Value(KindedConstant),

}
Expand description

Constants in the constant pool

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Int(i64)

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UInt(u64)

Unsigned 64-bit integer (for u64 values > i64::MAX)

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Number(f64)

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Decimal(Decimal)

Decimal type for exact arithmetic (finance, currency)

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String(String)

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Char(char)

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Bool(bool)

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Null

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Unit

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Function(u16)

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Timeframe(Timeframe)

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Duration(Duration)

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TimeReference(TimeReference)

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DateTimeExpr(DateTimeExpr)

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DataDateTimeRef(DataDateTimeRef)

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TypeAnnotation(TypeAnnotation)

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Value(KindedConstant)

Opaque runtime value (not serializable — used for host-injected constants like RowView, DataTable, TypedTable, etc.).

R8 W3 W17-typed-module-exports-followup-constant-pool (ADR-006 §2.7.4 / §2.7.7 / Q9, 2026-05-24): the placeholder unit shape (introduced post-strict-typing-bulldozer when the legacy Value(ValueWord) arm was deleted) is replaced by the kinded constant carrier KindedConstant { bits, kind }. Bits are a type-erased typed-Arc pointer (Arc::into_raw::<T> for the matching T) or an inline scalar; kind is the producer-side stamp identifying the carrier (§2.7.5). Refcount discipline is preserved by KindedConstant’s Clone (clone_with_kind) and Drop (drop_with_kind) impls — every op_push_const of this variant pushes a retained share via clone_with_kind. The constant carries its kind directly per §2.7.7/Q9; the dispatch shape mirrors the existing Constant::Decimal arm (§Forbidden Patterns preserved — no carrier reintroduction).

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impl Clone for Constant

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fn clone(&self) -> Constant

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for Constant

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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<'de> Deserialize<'de> for Constant

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for Constant

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fn eq(&self, other: &Constant) -> 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 Serialize for Constant

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for Constant

Auto Trait Implementations§

Blanket Implementations§

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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> 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, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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<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

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> PolicyExt for T
where T: ?Sized,

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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more
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fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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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<T> WithSubscriber for T

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

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,