tracing_subscriber::fmt::format

Struct DefaultVisitor

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pub struct DefaultVisitor<'a> { /* private fields */ }
Available on crate features fmt and std only.
Expand description

The visitor produced by DefaultFields’s MakeVisitor implementation.

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impl<'a> DefaultVisitor<'a>

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pub fn new(writer: Writer<'a>, is_empty: bool) -> Self

Returns a new default visitor that formats to the provided writer.

§Arguments
  • writer: the writer to format to.
  • is_empty: whether or not any fields have been previously written to that writer.

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impl<'a> Debug for DefaultVisitor<'a>

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

Formats the value using the given formatter. Read more
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impl<'a> Visit for DefaultVisitor<'a>

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fn record_str(&mut self, field: &Field, value: &str)

Visit a string value.
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fn record_error(&mut self, field: &Field, value: &(dyn Error + 'static))

Records a type implementing Error. Read more
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fn record_debug(&mut self, field: &Field, value: &dyn Debug)

Visit a value implementing fmt::Debug.
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fn record_f64(&mut self, field: &Field, value: f64)

Visit a double-precision floating point value.
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fn record_i64(&mut self, field: &Field, value: i64)

Visit a signed 64-bit integer value.
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fn record_u64(&mut self, field: &Field, value: u64)

Visit an unsigned 64-bit integer value.
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fn record_i128(&mut self, field: &Field, value: i128)

Visit a signed 128-bit integer value.
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fn record_u128(&mut self, field: &Field, value: u128)

Visit an unsigned 128-bit integer value.
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fn record_bool(&mut self, field: &Field, value: bool)

Visit a boolean value.
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impl<'a> VisitFmt for DefaultVisitor<'a>

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fn writer(&mut self) -> &mut dyn Write

Returns the formatter that this visitor writes to.
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impl<'a> VisitOutput<Result<(), Error>> for DefaultVisitor<'a>

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fn finish(self) -> Result

Completes the visitor, returning any output. Read more
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fn visit<R>(self, fields: &R) -> Out
where R: RecordFields, Self: Sized,

Visit a set of fields, and return the output of finishing the visitor once the fields have been visited.

Auto Trait Implementations§

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impl<'a> Freeze for DefaultVisitor<'a>

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impl<'a> !RefUnwindSafe for DefaultVisitor<'a>

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impl<'a> !Send for DefaultVisitor<'a>

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impl<'a> !Sync for DefaultVisitor<'a>

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impl<'a> Unpin for DefaultVisitor<'a>

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impl<'a> !UnwindSafe for DefaultVisitor<'a>

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes