Enum MapKey 

pub enum MapKey {
    Int(i32),
    Str(Arc<str>),
    Bool(bool),
}

A scalar key for a Value::Map.

v1 permits int, string, and bool keys (value-model-spec §4). Keys are compared for equality only — never hashed or sorted — because a Value::Map iterates in insertion order. Two keys of different variants are never equal (an Int(1) key and a Bool(true) key are distinct).

Variants

Int(i32)

An integer key.

Str(Arc<str>)

A string key.

Bool(bool)

A boolean key.

Implementations

impl MapKey

pub fn from_value(value: &Value) -> Option<Self>

Derive a map key from a scalar Value, or None if the value is not one of the permitted key types (int/string/bool).

This is the seam the collection opcodes (T1b) use to turn an indexing operand into a key; keeping it here keeps the permitted key domain in one place.

Trait Implementations

impl Clone for MapKey

fn clone(&self) -> MapKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MapKey

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for MapKey

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for MapKey

impl From<&str> for MapKey

fn from(v: &str) -> Self

Converts to this type from the input type.

impl From<Arc<str>> for MapKey

fn from(v: Arc<str>) -> Self

Converts to this type from the input type.

impl From<String> for MapKey

fn from(v: String) -> Self

Converts to this type from the input type.

impl From<bool> for MapKey

fn from(v: bool) -> Self

Converts to this type from the input type.

impl From<i32> for MapKey

fn from(v: i32) -> Self

Converts to this type from the input type.

impl PartialEq for MapKey

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for MapKey

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for MapKey