Struct Value 

pub struct Value<K: Key> { /* private fields */ }

A JSON value stored in a wide event.

Uses a tag + union layout (#[repr(C)]) to minimize size. The struct is 40 bytes — a 2x reduction from the previous 80-byte enum. The tag is a single byte; the remaining 7 bytes are padding for the 8-byte-aligned FastStr (32 bytes) in the union.

Variants

• ValueTag::Null — JSON null
• ValueTag::Bool — bool
• ValueTag::I64 — i64
• ValueTag::U64 — u64
• ValueTag::F64 — f64
• ValueTag::Str — owned string via FastStr (SSO for short strings)
• ValueTag::StaticStr — &'static str (zero-copy, zero-allocation)
• ValueTag::Array — Box<SmallVec<[Value; 8]>>
• ValueTag::Object — Box<WideEvent<K>>

Conversions

All primitive types implement Into<Value<K>>:

• bool → Bool
• i64 → I64
• u64 → U64
• f64 → F64
• &'static str → StaticStr (zero-copy)
• &str → Str (via FastStr::new, SSO for short strings)
• String → Str (via FastStr::from_string, takes ownership)
• FastStr → Str
• () → Null

Implementations

impl<K: Key> Value<K>

pub fn tag(&self) -> ValueTag

Returns the tag identifying the active variant.

pub fn is_object(&self) -> bool

Returns true if this value is an Object.

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

pub fn as_u64(&self) -> Option<u64>

pub fn as_i64(&self) -> Option<i64>

impl<K: Key> Value<K>

pub fn from_static_str(s: &'static str) -> Self

Creates a StaticStr value from a &'static str — zero-copy, zero-allocation.

Trait Implementations

impl<K: Key> Clone for Value<K>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<K: Key> Debug for Value<K>

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

Formats the value using the given formatter.

impl<K: Key> Drop for Value<K>

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl<K: Key> From<&str> for Value<K>

fn from(s: &str) -> Self

Converts to this type from the input type.

impl<K: Key> From<()> for Value<K>

fn from(_: ()) -> Self

Converts to this type from the input type.

impl<K: Key> From<FastStr> for Value<K>

fn from(s: FastStr) -> Self

Converts to this type from the input type.

impl<K: Key> From<String> for Value<K>

fn from(s: String) -> Self

Converts to this type from the input type.

impl<K: Key> From<bool> for Value<K>

fn from(b: bool) -> Self

Converts to this type from the input type.

impl<K: Key> From<f64> for Value<K>

fn from(n: f64) -> Self

Converts to this type from the input type.

impl<K: Key> From<i64> for Value<K>

fn from(n: i64) -> Self

Converts to this type from the input type.

impl<K: Key> From<u64> for Value<K>

fn from(n: u64) -> Self

Converts to this type from the input type.

impl<K: Key> Serialize for Value<K>

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.