Struct tracing_core::span::Current

source ·
pub struct Current { /* private fields */ }
Expand description

Indicates what the Subscriber considers the “current” span.

As subscribers may not track a notion of a current span, this has three possible states:

  • “unknown”, indicating that the subscriber does not track a current span,
  • “none”, indicating that the current context is known to not be in a span,
  • “some”, with the current span’s Id and Metadata.

Implementations§

Constructs a new Current that indicates the current context is a span with the given metadata and metadata.

Constructs a new Current that indicates the current context is not in a span.

Returns true if the Subscriber that constructed this Current tracks a current span.

If this returns true and id, metadata, or into_inner return None, that indicates that we are currently known to not be inside a span. If this returns false, those methods will also return None, but in this case, that is because the subscriber does not keep track of the currently-entered span.

Consumes self and returns the span Id and Metadata of the current span, if one exists and is known.

Borrows the Id of the current span, if one exists and is known.

Borrows the Metadata of the current span, if one exists and is known.

Trait Implementations§

Formats the value using the given formatter. Read more
Converts to this type from the input type.
Converts to this type from the input type.
Converts to this type from the input type.
Converts to this type from the input type.

Auto Trait Implementations§

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Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.