Enum Value 

#[non_exhaustive]
pub enum Value {
    Null,
    Bool(bool),
    Int(i64),
    Float(f64),
    Str(String),
    Bytes(Vec<u8>),
    List(Vec<Value>),
    Map(BTreeMap<String, Value>),
    DateTime(String),
    Date(String),
    Decimal(String),
    Uuid(String),
}

A single language-agnostic value.

The first variants map 1:1 onto JSON. The trailing typed-scalar variants (DateTime, Date, Decimal, Uuid) exist so the cursor codec can round-trip ordering keys with full fidelity — they carry the value’s canonical string form and the binding layer rebuilds the rich host type.

#[non_exhaustive]: this crate is published independently (core-v*) and Value is its central vocabulary type, so a future variant (e.g. a native big-integer) must not be a breaking change for downstream crates — like the sibling public enums (CoreError, FilterOp, …), it requires a _ arm.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Null

Absence of a value (None / null).

Bool(bool)

Boolean.

Int(i64)

64-bit signed integer.

Float(f64)

64-bit float.

Str(String)

UTF-8 string.

Bytes(Vec<u8>)

Opaque bytes.

List(Vec<Value>)

Ordered list of values.

Map(BTreeMap<String, Value>)

String-keyed map (an item / record).

DateTime(String)

ISO-8601 datetime (carried as its isoformat() string).

Date(String)

ISO-8601 date.

Decimal(String)

Arbitrary-precision decimal (carried as its canonical string).

Uuid(String)

UUID (carried as its canonical hyphenated string).

Implementations

impl Value

pub fn is_null(&self) -> bool

True when this value represents the absence of data.

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

Borrow the inner string for the textual variants, else None.

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Value

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

Formats the value using the given formatter.

impl PartialEq for Value

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