Trait Scalar 

pub trait Scalar: ScalarBounds<ScalarImpl> + 'static {
    type ScalarRefType<'a>: ScalarRef<'a, ScalarType = Self> + 'a
       where Self: 'a;

    // Required method
    fn as_scalar_ref(&self) -> Self::ScalarRefType<'_>;

    // Provided method
    fn to_scalar_value(self) -> ScalarImpl { ... }
}

Scalar is a trait over all possible owned types in the evaluation framework.

Scalar is reciprocal to ScalarRef. Use as_scalar_ref to get a reference which has the same lifetime as self.

Required Associated Types

type ScalarRefType<'a>: ScalarRef<'a, ScalarType = Self> + 'a where Self: 'a

Type for reference of Scalar

Required Methods

fn as_scalar_ref(&self) -> Self::ScalarRefType<'_>

Get a reference to current scalar.

Provided Methods

fn to_scalar_value(self) -> ScalarImpl

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl Scalar for Box<[u8]>

Implement Scalar for Bytes.

type ScalarRefType<'a> = &'a [u8]

fn as_scalar_ref(&self) -> &[u8]

impl Scalar for Box<str>

Implement Scalar for Box<str>. Box<str> could be converted to &str.

type ScalarRefType<'a> = &'a str

fn as_scalar_ref(&self) -> &str

impl Scalar for bool

Implement Scalar for bool.

type ScalarRefType<'a> = bool

fn as_scalar_ref(&self) -> bool

impl Scalar for i16

type ScalarRefType<'a> = i16

fn as_scalar_ref(&self) -> Self

impl Scalar for i32

type ScalarRefType<'a> = i32

fn as_scalar_ref(&self) -> Self

impl Scalar for i64

type ScalarRefType<'a> = i64

fn as_scalar_ref(&self) -> Self

Implementors

impl Scalar for Date

Implement Scalar for Date.

type ScalarRefType<'a> = Date

impl Scalar for Decimal

Implement Scalar for Decimal.

type ScalarRefType<'a> = Decimal

impl Scalar for F32

type ScalarRefType<'a> = OrderedFloat<f32>

impl Scalar for F64

type ScalarRefType<'a> = OrderedFloat<f64>

impl Scalar for Int256

type ScalarRefType<'a> = Int256Ref<'a>

impl Scalar for Interval

Implement Scalar for Interval.

type ScalarRefType<'a> = Interval

impl Scalar for JsonbVal

type ScalarRefType<'a> = JsonbRef<'a>

impl Scalar for ListValue

Implement Scalar for ListValue.

type ScalarRefType<'a> = ListRef<'a>

impl Scalar for MapValue

type ScalarRefType<'a> = MapRef<'a>

impl Scalar for Serial

type ScalarRefType<'a> = Serial

impl Scalar for StructValue

Implement Scalar for StructValue.

type ScalarRefType<'a> = StructRef<'a>

impl Scalar for Time

Implement Scalar for Time.

type ScalarRefType<'a> = Time

impl Scalar for Timestamp

Implement Scalar for Timestamp.

type ScalarRefType<'a> = Timestamp

impl Scalar for Timestamptz

Implement Scalar for Timestamptz.

type ScalarRefType<'a> = Timestamptz

impl Scalar for VectorVal

type ScalarRefType<'a> = VectorInner<&'a [OrderedFloat<f32>]>