Struct `Field`

struct Field { ... }

An opaque key allowing O(1) access to a field in a Span's key-value data.

As keys are defined by the metadata of a span, rather than by an individual instance of a span, a key may be used to access the same field across all instances of a given span with the same metadata. Thus, when a subscriber observes a new span, it need only access a field by name once, and use the key for that name for all other accesses.

Implementations

`impl Field`

fn callsite(self: &Self) -> Identifier: Returns an Identifier that uniquely identifies the Callsite which defines this field.
fn name(self: &Self) -> &'static str: Returns a string representing the name of the field.
fn index(self: &Self) -> usize: Returns the index of this field in its FieldSet.

`impl AsRef for Field`

fn as_ref(self: &Self) -> &str

`impl Clone for Field`

fn clone(self: &Self) -> Self

`impl Debug for Field`

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

`impl Display for Field`

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

`impl Eq for Field`

`impl Freeze for Field`

`impl Hash for Field`

fn hash<H>(self: &Self, state: &mut H) where H: Hasher

`impl PartialEq for Field`

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

`impl RefUnwindSafe for Field`

`impl Send for Field`

`impl Sync for Field`

`impl Unpin for Field`

`impl UnsafeUnpin for Field`

`impl UnwindSafe for Field`

`impl<T> Any for Field`

fn type_id(self: &Self) -> TypeId

`impl<T> Borrow for Field`

fn borrow(self: &Self) -> &T

`impl<T> BorrowMut for Field`

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

`impl<T> CloneToUninit for Field`

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

`impl<T> From for Field`

fn from(t: T) -> T: Returns the argument unchanged.

`impl<T> ToOwned for Field`

fn to_owned(self: &Self) -> T
fn clone_into(self: &Self, target: &mut T)

`impl<T> ToString for Field`

fn to_string(self: &Self) -> String

`impl<T, U> Into for Field`

fn into(self: Self) -> U

Calls U::from(self).

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

`impl<T, U> TryFrom for Field`

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

`impl<T, U> TryInto for Field`

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