# tracing::span::Record - Rust
API documentation for the Rust `Record` struct in crate `tracing`.
Keywords: rust, rustlang, rust-lang, Record

# Struct tracing::span::Record [−] [src]

    pub struct Record<'a> { /* fields omitted */ }

A set of fields recorded by a span.

## Implementations

### `impl<'a> Record<'a>` [src]

#### `pub fn new(values: &'a ValueSet<'a>) -> Record<'a>` [src]

Constructs a new `Record` from a `ValueSet`.

#### `pub fn record(&self, visitor: &mut dyn Visit)` [src]

Records all the fields in this `Record` with the provided Visitor.

#### `pub fn contains(&self, field: &Field) -> bool` [src]

Returns `true` if this `Record` contains a value for the given `Field`.

#### `pub fn is_empty(&self) -> bool` [src]

Returns true if this `Record` contains no values.

## Trait Implementations

### `impl<'a> Debug for Record<'a>` [src]

#### `pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>` [src]

Formats the value using the given formatter. Read more

## Auto Trait Implementations

### `impl<'a> !RefUnwindSafe for Record<'a>` [src]

### `impl<'a> !Send for Record<'a>` [src]

### `impl<'a> !Sync for Record<'a>` [src]

### `impl<'a> Unpin for Record<'a>` [src]

### `impl<'a> !UnwindSafe for Record<'a>` [src]

## Blanket Implementations

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `pub fn type_id(&self) -> TypeId` [src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow(&self) -> &T` [src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow_mut(&mut self) -> &mut T` [src]

Mutably borrows from an owned value. Read more

### `impl<T> From<T> for T` [src]

#### `pub fn from(t: T) -> T` [src]

Performs the conversion.

### `impl<T> Instrument for T` [src]

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

### Notable traits for Instrumented<T>

`impl<T: Future> Future for Instrumented<T> type Output = T::Output;`
` [src]

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

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

### Notable traits for Instrumented<T>

`impl<T: Future> Future for Instrumented<T> type Output = T::Output;`
` [src]

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

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `pub fn into(self) -> U` [src]

Performs the conversion.

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>` [src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

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

The type returned in the event of a conversion error.

#### `pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>` [src]

Performs the conversion.