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JsValue

Enum JsValue

pub enum JsValue {
    Undefined,
    Null,
    Bool(bool),
    Number(f64),
    String(JsStr),
    Array(JsArray),
    Object(JsObject),
}

Available on crate features js and std only.

Expand description

An engine-agnostic js value.

This is the type in which values cross the js boundary in both directions: script results, host function arguments and return values, and configured globals.

Function values cannot cross the boundary: a top-level function result is a JsErrorKind::Conversion error, and function properties are skipped when snapshotting objects (mirroring JSON.stringify semantics).

Variants§

Undefined

undefined

Null

null

Bool(bool)

true / false

Number(f64)

any js number (always an f64, like in js itself)

String(JsStr)

a string value

Array(JsArray)

an array snapshot

Object(JsObject)

an object snapshot

Implementations§

impl JsValue

pub fn deserialize_into<T>(&self) -> Result<T, JsError>
where T: DeserializeOwned,

Deserialize this value into any serde-capable type.

impl JsValue

pub fn is_undefined(&self) -> bool

Returns true if this value is undefined.

pub fn is_null(&self) -> bool

Returns true if this value is null.

pub fn is_null_or_undefined(&self) -> bool

Returns true if this value is null or undefined.

pub fn as_bool(&self) -> Option<bool>

The inner bool, if this value is a boolean.

pub fn as_f64(&self) -> Option<f64>

The inner number, if this value is a number.

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

The inner string as a str, if this value is a string.

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

The inner JsStr, if this value is a string.

pub fn as_array(&self) -> Option<&JsArray>

The inner JsArray, if this value is an array.

pub fn as_object(&self) -> Option<&JsObject>

The inner JsObject, if this value is an object.

pub fn type_name(&self) -> &'static str

The js name of this value’s type, useful in error messages.

Trait Implementations§

impl Clone for JsValue

fn clone(&self) -> JsValue

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl Debug for JsValue

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

Formats the value using the given formatter. Read more

impl Default for JsValue

fn default() -> JsValue

Returns the “default value” for a type. Read more

impl<'de> Deserialize<'de> for JsValue

fn deserialize<D>( deserializer: D, ) -> Result<JsValue, <D as Deserializer<'de>>::Error>
where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more

impl Display for JsValue

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

Console-style rendering: top-level strings print raw, nested values render JSON-like.

impl From<&Authority> for JsValue

fn from(value: &Authority) -> JsValue

Converts to this type from the input type.

impl From<&Domain> for JsValue

fn from(value: &Domain) -> JsValue

Converts to this type from the input type.

impl From<&Host> for JsValue

fn from(value: &Host) -> JsValue

Converts to this type from the input type.

impl From<&IpAddr> for JsValue

fn from(value: &IpAddr) -> JsValue

Converts to this type from the input type.

impl From<&Ipv4Addr> for JsValue

fn from(value: &Ipv4Addr) -> JsValue

Converts to this type from the input type.

impl From<&Ipv6Addr> for JsValue

fn from(value: &Ipv6Addr) -> JsValue

Converts to this type from the input type.

impl From<&SocketAddr> for JsValue

fn from(value: &SocketAddr) -> JsValue

Converts to this type from the input type.

impl From<&SocketAddress> for JsValue

fn from(value: &SocketAddress) -> JsValue

Converts to this type from the input type.

impl From<&String> for JsValue

fn from(s: &String) -> JsValue

Converts to this type from the input type.

impl From<&str> for JsValue

fn from(s: &str) -> JsValue

Converts to this type from the input type.

impl From<()> for JsValue

fn from(_: ()) -> JsValue

Converts to this type from the input type.

impl From<Authority> for JsValue

fn from(value: Authority) -> JsValue

Converts to this type from the input type.

impl From<Cow<'_, str>> for JsValue

fn from(s: Cow<'_, str>) -> JsValue

Converts to this type from the input type.

impl From<Domain> for JsValue

fn from(value: Domain) -> JsValue

Converts to this type from the input type.

impl From<Host> for JsValue

fn from(value: Host) -> JsValue

Converts to this type from the input type.

impl From<IpAddr> for JsValue

fn from(value: IpAddr) -> JsValue

Converts to this type from the input type.

impl From<Ipv4Addr> for JsValue

fn from(value: Ipv4Addr) -> JsValue

Converts to this type from the input type.

impl From<Ipv6Addr> for JsValue

fn from(value: Ipv6Addr) -> JsValue

Converts to this type from the input type.

impl From<JsArray> for JsValue

fn from(arr: JsArray) -> JsValue

Converts to this type from the input type.

impl From<JsObject> for JsValue

fn from(obj: JsObject) -> JsValue

Converts to this type from the input type.

impl From<JsStr> for JsValue

fn from(s: JsStr) -> JsValue

Converts to this type from the input type.

impl<T> From<Option<T>> for JsValue
where T: Into<JsValue>,

fn from(opt: Option<T>) -> JsValue

Converts to this type from the input type.

impl From<SocketAddr> for JsValue

fn from(value: SocketAddr) -> JsValue

Converts to this type from the input type.

impl From<SocketAddress> for JsValue

fn from(value: SocketAddress) -> JsValue

Converts to this type from the input type.

impl From<String> for JsValue

fn from(s: String) -> JsValue

Converts to this type from the input type.

impl<T> From<Vec<T>> for JsValue
where T: Into<JsValue>,

fn from(values: Vec<T>) -> JsValue

Converts to this type from the input type.

impl<T, const N: usize> From<[T; N]> for JsValue
where T: Into<JsValue>,

fn from(values: [T; N]) -> JsValue

Converts to this type from the input type.

impl From<bool> for JsValue

fn from(b: bool) -> JsValue

Converts to this type from the input type.

impl From<char> for JsValue

fn from(c: char) -> JsValue

Converts to this type from the input type.

impl From<f32> for JsValue

fn from(n: f32) -> JsValue

Converts to this type from the input type.

impl From<f64> for JsValue

fn from(n: f64) -> JsValue

Converts to this type from the input type.

impl From<i8> for JsValue

fn from(n: i8) -> JsValue

Converts to this type from the input type.

impl From<i16> for JsValue

fn from(n: i16) -> JsValue

Converts to this type from the input type.

impl From<i32> for JsValue

fn from(n: i32) -> JsValue

Converts to this type from the input type.

impl From<u8> for JsValue

fn from(n: u8) -> JsValue

Converts to this type from the input type.

impl From<u16> for JsValue

fn from(n: u16) -> JsValue

Converts to this type from the input type.

impl From<u32> for JsValue

fn from(n: u32) -> JsValue

Converts to this type from the input type.

impl JsArg for JsValue

fn from_js(value: JsValue) -> Result<JsValue, JsError>

Extract this argument from the given value.

fn from_missing_js_arg() -> Result<Self, JsError>

Extract this argument when the caller did not provide it. Read more

impl PartialEq for JsValue

Values are compared structurally without recursing, so host-constructed values of absurd depth cannot overflow the stack.

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

Equality operator ==. Read more

1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more

impl Serialize for JsValue

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

Serialize this value into the given Serde serializer. Read more

impl TryFrom<JsValue> for bool

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<bool, <bool as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for f64

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<f64, <f64 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for f32

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<f32, <f32 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for i8

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<i8, <i8 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for i16

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<i16, <i16 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for i32

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<i32, <i32 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for i64

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<i64, <i64 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for u8

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<u8, <u8 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for u16

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<u16, <u16 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for u32

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<u32, <u32 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for u64

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<u64, <u64 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for isize

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<isize, <isize as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for usize

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<usize, <usize as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for i128

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<i128, <i128 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for u128

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<u128, <u128 as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for JsStr

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<JsStr, <JsStr as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for String

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<String, <String as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for JsArray

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<JsArray, <JsArray as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for JsObject

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<JsObject, <JsObject as TryFrom<JsValue>>::Error>

Performs the conversion.

impl<T> TryFrom<JsValue> for Option<T>
where T: TryFrom<JsValue, Error = JsError>,

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<Option<T>, <Option<T> as TryFrom<JsValue>>::Error>

Performs the conversion.

impl<T> TryFrom<JsValue> for Vec<T>
where T: TryFrom<JsValue, Error = JsError>,

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<Vec<T>, <Vec<T> as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for IpNet

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<IpNet, <IpNet as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for IpAddr

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<IpAddr, <IpAddr as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for Ipv4Addr

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<Ipv4Addr, <Ipv4Addr as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for Ipv6Addr

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<Ipv6Addr, <Ipv6Addr as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for SocketAddr

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<SocketAddr, <SocketAddr as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for Domain

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<Domain, <Domain as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for Host

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(value: JsValue) -> Result<Host, <Host as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for Authority

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<Authority, <Authority as TryFrom<JsValue>>::Error>

Performs the conversion.

impl TryFrom<JsValue> for SocketAddress

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: JsValue, ) -> Result<SocketAddress, <SocketAddress as TryFrom<JsValue>>::Error>

Performs the conversion.

impl<T> TryFrom<Serde<T>> for JsValue
where T: Serialize,

type Error = JsError

The type returned in the event of a conversion error.

fn try_from( value: Serde<T>, ) -> Result<JsValue, <JsValue as TryFrom<Serde<T>>>::Error>

Performs the conversion.

impl TryFrom<i64> for JsValue

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(n: i64) -> Result<JsValue, <JsValue as TryFrom<i64>>::Error>

Performs the conversion.

impl TryFrom<i128> for JsValue

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(n: i128) -> Result<JsValue, <JsValue as TryFrom<i128>>::Error>

Performs the conversion.

impl TryFrom<isize> for JsValue

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(n: isize) -> Result<JsValue, <JsValue as TryFrom<isize>>::Error>

Performs the conversion.

impl TryFrom<u64> for JsValue

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(n: u64) -> Result<JsValue, <JsValue as TryFrom<u64>>::Error>

Performs the conversion.

impl TryFrom<u128> for JsValue

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(n: u128) -> Result<JsValue, <JsValue as TryFrom<u128>>::Error>

Performs the conversion.

impl TryFrom<usize> for JsValue

type Error = JsError

The type returned in the event of a conversion error.

fn try_from(n: usize) -> Result<JsValue, <JsValue as TryFrom<usize>>::Error>

Performs the conversion.

Auto Trait Implementations§

impl Freeze for JsValue

impl RefUnwindSafe for JsValue

impl Send for JsValue

impl Sync for JsValue

impl Unpin for JsValue

impl UnsafeUnpin for JsValue

impl UnwindSafe for JsValue

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<'a, T, E> AsTaggedExplicit<'a, E> for T
where T: 'a,

fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

impl<'a, T, E> AsTaggedImplicit<'a, E> for T
where T: 'a,

fn implicit( self, class: Class, constructed: bool, tag: u32, ) -> TaggedParser<'a, Implicit, Self, E>

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dest: *mut u8)

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

Performs copy-assignment from self to dest. Read more

impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> FromRef<T> for T
where T: Clone,

fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.

impl<T> FutureExt for T

fn with_context(self, otel_cx: Context) -> WithContext<Self> ⓘ

Attaches the provided Context to this type, returning a WithContext wrapper. Read more

fn with_current_context(self) -> WithContext<Self> ⓘ

Attaches the current Context to this type, returning a WithContext wrapper. Read more

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into<U> for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

impl<T> IntoJsGlobal for T
where T: Into<JsValue>,

fn into_global_entry(self) -> JsGlobal

Lower into the global registration entry.

impl<T> IntoRequest<T> for T

fn into_request(self) -> Request<T>

Wrap the input message T in a rama_grpc::Request

impl<T> JsFnOutput<ValueOutput> for T
where T: Into<JsValue> + Send + 'static,

fn into_js_fn_output(self) -> Result<JsValue, JsError>

Convert into the raw host function output.

impl<L> LayerExt<L> for L

fn named_layer<S>(&self, service: S) -> Layered<<L as Layer<S>>::Service, S>
where L: Layer<S>,

Applies the layer to a service and wraps it in Layered.

impl<T> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T> PolicyExt for T
where T: ?Sized,

fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Sized + Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more

fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Sized + Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more

impl<T, U> RamaFrom<T> for U
where U: From<T>,

fn rama_from(value: T) -> U

impl<T, U, CrateMarker> RamaInto<U, CrateMarker> for T
where U: RamaFrom<T, CrateMarker>,

fn rama_into(self) -> U

impl<T, U> RamaTryFrom<T> for U
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn rama_try_from(value: T) -> Result<U, <U as RamaTryFrom<T>>::Error>

impl<T, U, CrateMarker> RamaTryInto<U, CrateMarker> for T
where U: RamaTryFrom<T, CrateMarker>,

type Error = <U as RamaTryFrom<T, CrateMarker>>::Error

fn rama_try_into(self) -> Result<U, <U as RamaTryFrom<T, CrateMarker>>::Error>

impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

impl<T> Same for T

type Output = T

Should always be Self

impl<T> ToOwned for T
where T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> ToSmolStr for T
where T: Display + ?Sized,

fn to_smolstr(&self) -> SmolStr

impl<T> ToString for T
where T: Display + ?Sized,

fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<T> ToStringFallible for T
where T: Display,

fn try_to_string(&self) -> Result<String, TryReserveError>

ToString::to_string, but without panic on OOM.

impl<T, U> TryFrom<U> for T
where U: Into<T>,

type Error = !

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn vzip(self) -> V

impl<V, F> ValueFormatter<&V> for F
where F: ValueFormatter<V> + ?Sized, V: ?Sized,

const SHAPE: FieldShape<'static>

Available on non-metrique_require_explicit_impls only.

The shape of values produced by this formatter. Read more

fn format_value(writer: impl ValueWriter, value: &&V)

Write value to writer

impl<V, F> ValueFormatter<Arc<V>> for F
where F: ValueFormatter<V> + ?Sized, V: ?Sized,

const SHAPE: FieldShape<'static>

Available on non-metrique_require_explicit_impls only.

The shape of values produced by this formatter. Read more

fn format_value(writer: impl ValueWriter, value: &Arc<V>)

Write value to writer

impl<V, F> ValueFormatter<Box<V>> for F
where F: ValueFormatter<V> + ?Sized, V: ?Sized,

const SHAPE: FieldShape<'static>

Available on non-metrique_require_explicit_impls only.

The shape of values produced by this formatter. Read more

fn format_value(writer: impl ValueWriter, value: &Box<V>)

Write value to writer

impl<V, F> ValueFormatter<Cow<'_, V>> for F
where V: ToOwned + ?Sized, F: ValueFormatter<V> + ?Sized,

const SHAPE: FieldShape<'static>

Available on non-metrique_require_explicit_impls only.

The shape of values produced by this formatter. Read more

fn format_value(writer: impl ValueWriter, value: &Cow<'_, V>)

Write value to writer

impl<V, F> ValueFormatter<Option<V>> for F
where F: ValueFormatter<V> + ?Sized,

const SHAPE: FieldShape<'static>

Available on non-metrique_require_explicit_impls only.

The shape of values produced by this formatter. Read more

fn format_value(writer: impl ValueWriter, value: &Option<V>)

Write value to writer

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more