Enum SlotKind

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enum SlotKind {
    RawSexp,
    ScalarInt,
    ScalarReal,
    ScalarLogical,
    ScalarRaw,
    Conversion,
}

Expand description

The kind of sidecar slot, determining how getter/setter FFI functions are generated.

Each kind maps to a different codegen strategy for reading from and writing to the Rust struct through R’s .Call interface:

Raw SEXP: no conversion, direct pass-through.
Zero-overhead scalars: use R’s Rf_Scalar*/Rf_as* for single-element coercion.
Conversion: use the IntoR/TryFromSexp traits for arbitrary types.

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RawSexp

SEXP type – raw SEXP access (getter returns SEXP, setter takes SEXP).

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ScalarInt

Zero-overhead scalar: i32 (or i16/i8) stored as INTEGER(1).

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ScalarReal

Zero-overhead scalar: f64 (or f32) stored as REAL(1).

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ScalarLogical

Zero-overhead scalar: bool (or Rbool) stored as LOGICAL(1).

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ScalarRaw

Zero-overhead scalar: u8 stored as RAW(1).

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Conversion

Conversion type – uses IntoR/TryFromSexp traits for arbitrary Rust types.

Trait Implementations§

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impl Clone for SlotKind

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fn clone(&self) -> SlotKind

Returns a duplicate of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for SlotKind

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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 Eq for SlotKind

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#[doc(hidden)]
fn assert_fields_are_eq(&self)

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

1.0.0 (const: unstable) · Source§

#[doc(hidden)]
fn assert_receiver_is_total_eq(&self)

👎Deprecated since 1.95.0:

implementation detail of #[derive(Eq)]

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impl PartialEq for SlotKind

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fn eq(&self, other: &SlotKind) -> 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 StructuralPartialEq for SlotKind

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impl TrivialClone for SlotKind

Auto Trait Implementations§

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impl RefUnwindSafe for SlotKind

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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, U> Into 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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