Enum EvalValue 

pub enum EvalValue {
    Integer(i64),
    Double(f64),
    Boolean(bool),
    String(String),
}

Typed value produced by Expression::eval.

Distinct from Value because an intermediate expression result has no parameter name — it’s a raw typed value that the calling derived parameter then wraps with its own name and provenance.

Variants

Integer(i64)

64-bit signed integer.

Double(f64)

IEEE-754 f64.

Boolean(bool)

Boolean.

String(String)

UTF-8 string.

Implementations

impl EvalValue

pub const fn kind(&self) -> ValueKind

Discriminator.

pub const fn as_integer(&self) -> Option<i64>

i64 accessor.

pub const fn as_double(&self) -> Option<f64>

f64 accessor.

pub const fn as_boolean(&self) -> Option<bool>

bool accessor.

pub fn as_string(&self) -> Option<&str>

str accessor.

Trait Implementations

impl Clone for EvalValue

fn clone(&self) -> EvalValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EvalValue

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

Formats the value using the given formatter.

impl PartialEq for EvalValue

fn eq(&self, other: &EvalValue) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<&Value> for EvalValue

type Error = DerivationError

The type returned in the event of a conversion error.

fn try_from(v: &Value) -> Result<Self, Self::Error>

Performs the conversion.

impl StructuralPartialEq for EvalValue