Struct tracing_core::span::Current [−][src]
pub struct Current { /* fields omitted */ }Indicates what the Subscriber considers the “current” span.
As subscribers may not track a notion of a current span, this has three possible states:
Implementations
impl Current[src]
impl Current[src]pub fn new(id: Id, metadata: &'static Metadata<'static>) -> Self[src]
Constructs a new Current that indicates the current context is a span
with the given metadata and metadata.
pub fn none() -> Self[src]
Constructs a new Current that indicates the current context is not
in a span.
pub fn is_known(&self) -> bool[src]
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.
pub fn into_inner(self) -> Option<(Id, &'static Metadata<'static>)>[src]
Consumes self and returns the span Id and Metadata of the current
span, if one exists and is known.
pub fn id(&self) -> Option<&Id>[src]
Borrows the Id of the current span, if one exists and is known.
pub fn metadata(&self) -> Option<&'static Metadata<'static>>[src]
Borrows the Metadata of the current span, if one exists and is known.