Enum ExtensionValue 

pub enum ExtensionValue {
    String(String),
    Integer(i64),
    Float(f64),
    Boolean(bool),
    Expr(Expr),
    Enum(String),
    Tuple(TupleValue),
}

Represents a value in extension arguments.

These values are the structured form of text-format extension arguments, fully resolved - i.e. any additional context (such as function anchors etc) are part of this struct itself.

Variants

String(String)

Untyped literals. These are not input or output with types (e.g. 2, not 2:i64), and suitable for protobuf extension fields that are not substrait types.

Integer(i64)

Float(f64)

Boolean(bool)

Expr(Expr)

Substrait expression value, including typed literals and field references.

Use TryFrom<&ExtensionValue> for Expr when a handler accepts either an expression or a scalar value widened into an expression.

Enum(String)

Enum value (e.g. &CORE, &Inner) — the string holds the identifier without the & prefix

Tuple(TupleValue)

Tuple of values, e.g. (&HASH, &RANGE) or (42, ‘hello’)

Implementations

impl ExtensionValue

pub fn kind(&self) -> ExtensionValueKind

Return the variant kind of this value for structured diagnostics.

Trait Implementations

impl Clone for ExtensionValue

fn clone(&self) -> ExtensionValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtensionValue

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<&str> for ExtensionValue

fn from(value: &str) -> Self

Converts to this type from the input type.

impl From<Expr> for ExtensionValue

fn from(expr: Expr) -> Self

Converts to this type from the input type.

impl From<Expression> for ExtensionValue

fn from(expr: Expression) -> Self

Converts to this type from the input type.

impl From<Literal> for ExtensionValue

fn from(literal: Literal) -> Self

Converts to this type from the input type.

impl From<Reference> for ExtensionValue

fn from(reference: Reference) -> Self

Converts to this type from the input type.

impl From<String> for ExtensionValue

fn from(value: String) -> Self

Converts to this type from the input type.

impl From<bool> for ExtensionValue

fn from(value: bool) -> Self

Converts to this type from the input type.

impl From<f64> for ExtensionValue

fn from(value: f64) -> Self

Converts to this type from the input type.

impl From<i64> for ExtensionValue

fn from(value: i64) -> Self

Converts to this type from the input type.

impl FromIterator<ExtensionValue> for TupleValue

fn from_iter<I: IntoIterator<Item = ExtensionValue>>(iter: I) -> Self

Creates a value from an iterator.

impl ScopedParsePair for ExtensionValue

fn rule() -> Rule

fn message() -> &'static str

fn parse_pair( extensions: &SimpleExtensions, pair: Pair<'_, Rule>, ) -> Result<Self, MessageParseError>

impl Textify for ExtensionValue

fn name() -> &'static str

fn textify<S: Scope, W: Write>(&self, ctx: &S, w: &mut W) -> Result

impl<'a> TryFrom<&'a ExtensionValue> for &'a TupleValue

type Error = ExtensionError

The type returned in the event of a conversion error.

fn try_from(value: &'a ExtensionValue) -> Result<&'a TupleValue, Self::Error>

Performs the conversion.

impl<'a> TryFrom<&'a ExtensionValue> for &'a str

type Error = ExtensionError

The type returned in the event of a conversion error.

fn try_from(value: &'a ExtensionValue) -> Result<&'a str, Self::Error>

Performs the conversion.

impl<'a> TryFrom<&'a ExtensionValue> for EnumValue

type Error = ExtensionError

The type returned in the event of a conversion error.

fn try_from(value: &'a ExtensionValue) -> Result<EnumValue, Self::Error>

Performs the conversion.

impl TryFrom<&ExtensionValue> for Expr

type Error = ExtensionError

The type returned in the event of a conversion error.

fn try_from(value: &ExtensionValue) -> Result<Expr, Self::Error>

Performs the conversion.

impl TryFrom<&ExtensionValue> for Reference

type Error = ExtensionError

The type returned in the event of a conversion error.

fn try_from(value: &ExtensionValue) -> Result<Reference, Self::Error>

Performs the conversion.

impl TryFrom<&ExtensionValue> for bool

type Error = ExtensionError

The type returned in the event of a conversion error.

fn try_from(value: &ExtensionValue) -> Result<bool, Self::Error>

Performs the conversion.

impl TryFrom<&ExtensionValue> for f64

type Error = ExtensionError

The type returned in the event of a conversion error.

fn try_from(value: &ExtensionValue) -> Result<f64, Self::Error>

Performs the conversion.

impl TryFrom<&ExtensionValue> for i64

type Error = ExtensionError

The type returned in the event of a conversion error.

fn try_from(value: &ExtensionValue) -> Result<i64, Self::Error>

Performs the conversion.

impl TryFrom<ExtensionValue> for String

type Error = ExtensionError

The type returned in the event of a conversion error.

fn try_from(value: ExtensionValue) -> Result<String, Self::Error>

Performs the conversion.