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", so this trait is not object safe.

Implementations on Foreign Types

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

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 Box<[u8]>

Implement Scalar for Bytes.

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

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

Implementors

impl Scalar for Decimal

Implement Scalar for Decimal.

type ScalarRefType<'a> = Decimal

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 StructValue

Implement Scalar for StructValue.

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

impl Scalar for Date

Implement Scalar for Date.

type ScalarRefType<'a> = Date

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 Serial

type ScalarRefType<'a> = Serial

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 F32

type ScalarRefType<'a> = OrderedFloat<f32>

impl Scalar for F64

type ScalarRefType<'a> = OrderedFloat<f64>