Skip to main content

MetadataValue

Enum MetadataValue

pub enum MetadataValue {
    String(String),
    Integer(i64),
    Float(f64),
    Bool(bool),
}

Expand description

A metadata value: a string, a number or a boolean.

Variants§

String(String)

A string (at most 512 characters).

Integer(i64)

An integer.

Float(f64)

A finite number.

Bool(bool)

A boolean.

Trait Implementations§

impl Clone for MetadataValue

fn clone(&self) -> Self

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 MetadataValue

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

Formats the value using the given formatter. Read more

impl From<&String> for MetadataValue

fn from(v: &String) -> Self

Converts to this type from the input type.

impl From<&str> for MetadataValue

fn from(v: &str) -> Self

Converts to this type from the input type.

impl From<String> for MetadataValue

fn from(v: String) -> Self

Converts to this type from the input type.

impl From<bool> for MetadataValue

fn from(v: bool) -> Self

Converts to this type from the input type.

impl From<f32> for MetadataValue

fn from(v: f32) -> Self

Converts to this type from the input type.

impl From<f64> for MetadataValue

fn from(v: f64) -> Self

Converts to this type from the input type.

impl From<i8> for MetadataValue

fn from(v: i8) -> Self

Converts to this type from the input type.

impl From<i16> for MetadataValue

fn from(v: i16) -> Self

Converts to this type from the input type.

impl From<i32> for MetadataValue

fn from(v: i32) -> Self

Converts to this type from the input type.

impl From<i64> for MetadataValue

fn from(v: i64) -> Self

Converts to this type from the input type.

impl From<u8> for MetadataValue

fn from(v: u8) -> Self

Converts to this type from the input type.

impl From<u16> for MetadataValue

fn from(v: u16) -> Self

Converts to this type from the input type.

impl From<u32> for MetadataValue

fn from(v: u32) -> Self

Converts to this type from the input type.

impl PartialEq for MetadataValue

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

Equality operator ==. Read more

1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more

impl Serialize for MetadataValue

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

Serialize this value into the given Serde serializer. Read more

impl StructuralPartialEq for MetadataValue

Auto Trait Implementations§

impl Freeze for MetadataValue

impl RefUnwindSafe for MetadataValue

impl Send for MetadataValue

impl Sync for MetadataValue

impl Unpin for MetadataValue

impl UnsafeUnpin for MetadataValue

impl UnwindSafe for MetadataValue

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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<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> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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> 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> 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, 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, !>

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<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