Struct tracing_subscriber::fmt::FormattedFields [−][src]
A formatted representation of a span’s fields stored in its extensions.
Because FormattedFields
is generic over the type of the formatter that
produced it, multiple versions of a span’s formatted fields can be stored in
the Extensions
type-map. This means that when multiple
formatters are in use, each can store its own formatted representation
without conflicting.
Fields
fields: String
The formatted fields of a span.
Implementations
impl<E> FormattedFields<E>
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Methods from Deref<Target = String>
pub fn as_str(&self) -> &str
1.7.0[src]
Extracts a string slice containing the entire String
.
Examples
Basic usage:
let s = String::from("foo"); assert_eq!("foo", s.as_str());
pub fn capacity(&self) -> usize
1.0.0[src]
Returns this String
’s capacity, in bytes.
Examples
Basic usage:
let s = String::with_capacity(10); assert!(s.capacity() >= 10);
pub fn as_bytes(&self) -> &[u8]
1.0.0[src]
Returns a byte slice of this String
’s contents.
The inverse of this method is from_utf8
.
Examples
Basic usage:
let s = String::from("hello"); assert_eq!(&[104, 101, 108, 108, 111], s.as_bytes());
pub fn len(&self) -> usize
1.0.0[src]
Returns the length of this String
, in bytes, not char
s or
graphemes. In other words, it may not be what a human considers the
length of the string.
Examples
Basic usage:
let a = String::from("foo"); assert_eq!(a.len(), 3); let fancy_f = String::from("ƒoo"); assert_eq!(fancy_f.len(), 4); assert_eq!(fancy_f.chars().count(), 3);
pub fn is_empty(&self) -> bool
1.0.0[src]
Returns true
if this String
has a length of zero, and false
otherwise.
Examples
Basic usage:
let mut v = String::new(); assert!(v.is_empty()); v.push('a'); assert!(!v.is_empty());
Trait Implementations
impl<E> Debug for FormattedFields<E>
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impl<E: Default> Default for FormattedFields<E>
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fn default() -> FormattedFields<E>
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impl<E> Deref for FormattedFields<E>
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impl<E> Display for FormattedFields<E>
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Auto Trait Implementations
impl<E> RefUnwindSafe for FormattedFields<E>
impl<E> Send for FormattedFields<E>
impl<E> Sync for FormattedFields<E>
impl<E> Unpin for FormattedFields<E>
impl<E> UnwindSafe for FormattedFields<E>
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T> Instrument for T
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pub fn instrument(self, span: Span) -> Instrumented<Self>
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pub fn in_current_span(self) -> Instrumented<Self>
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
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>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,