tracing-subscriber 0.2.22

This fixes a regression where the filter::ParseError type was
accidentally renamed.

Fixed

• filter: Fix filter::ParseError accidentally being renamed to
  filter::DirectiveParseError (#1558)

tracing-attributes 0.1.16

This release adds a new #[instrument(skip_all)] option to skip recording all
arguments to an instrumented function as fields. Additionally, it adds support
for recording arguments that are tracing primitive types as typed values,
rather than as fmt::Debug.

Added

• add skip_all option to #[instrument] (#1548)
• record primitive types as primitive values rather than as fmt::Debug
  (#1378)
• added support for f64s as typed values (#1522)

Thanks to @Folyd and @jsgf for contributing to this release!

tracing 0.1.27

This release adds a new Span::or_current method to aid in
efficiently propagating span contexts to spawned threads or tasks.
Additionally, it updates the tracing-core version to 0.1.20 and
the tracing-attributes version to 0.1.16, ensuring that a number
of new features in those crates are present.

Fixed

• instrument: Added missing WithSubscriber implementations for
  futures and other types (#1424)

Added

• Span::or_current method, to help with efficient span context
  propagation (#1538)
• attributes: add skip_all option to #[instrument] (#1548)
• attributes: record primitive types as primitive values rather than
  as fmt::Debug (#1378)
• core: NoSubscriber, a no-op Subscriber implementation
  (#1549)
• core: Added Visit::record_f64 and support for recording
  floating-point values (#1507, #1522)
• A large number of documentation improvements and fixes (#1369,
  #1398, #1435, #1442, #1524, #1556)

Thanks to new contributors @dzvon and @mbergkvist, as well as @teozkr,
@maxburke, @LukeMathWalker, and @jsgf, for contributing to this release!

tracing-subscriber 0.2.21

This release introduces the Filter trait, a new API for per-layer
filtering. This allows controlling which spans and events are
recorded by various layers individually, rather than globally.

In addition, it adds a new Targets filter, which provides a
lighter-weight version of the filtering provided by EnvFilter, as
well as other smaller API improvements and fixes.

Deprecated

• registry: SpanRef::parent_id, which cannot properly support
  per-layer filtering. Use .parent().map(SpanRef::id) instead.
  (#1523)

Fixed

• layer Context methods that are provided when the Subscriber
  implements LookupSpan no longer require the "registry" feature flag
  (#1525)
• layer fmt::Debug implementation for Layered no longer requires
  the S type parameter to implement Debug (#1528)

Added

• registry: Filter trait, Filtered type, Layer::with_filter
  method, and other APIs for per-layer filtering (#1523)
• filter: FilterFn and DynFilterFn types that implement global
  (Layer) and per-layer (Filter) filtering for closures and function
  pointers (#1523)
• filter: Targets filter, which implements a lighter-weight form
  of EnvFilter-like filtering (#1550)
• env-filter: Added support for filtering on floating-point values
  (#1507)
• layer: Layer::on_layer callback, called when layering the
  Layer onto a Subscriber (#1523)
• layer: Layer implementations for Box<L> and Arc<L> where L: Layer (#1536)
• layer: Layer implementations for Box<dyn Layer> and
  Arc<dyn Layer> (#1536)
• A number of small documentation fixes and improvements (#1553,
  #1544, #1539, #1524)

Special thanks to new contributors @jsgf and @maxburke for contributing
to this release!

tracing-core 0.1.20

This release adds support for f64 as one of the tracing-core
primitive field values, allowing floating-point values to be recorded as
typed values rather than with fmt::Debug. Additionally, it adds
NoSubscriber, a Subscriber implementation that does nothing.

Added

• subscriber: NoSubscriber, a no-op Subscriber implementation
  (#1549)
• field: Added Visit::record_f64 and support for recording
  floating-point values (#1507)

Thanks to new contributors @jsgf and @maxburke for contributing to this
release!

tracing-subscriber 0.2.14

0.2.14 (October 22, 2020)

Fixed

• registry: Fixed Registry::new allocating an excessively large amount of
  memory, most of which would never be used (#1064)

Changed

• registry: Improved new_span performance by reusing HashMap allocations
  for Extensions (#1064)
• registry: Significantly improved the performance of Registry::enter and
  Registry::exit (#1058)

tracing-core 0.1.17

Fixed

• Incorrect inlining of Event::dispatch and Event::child_of, which
  could result in dispatcher::get_default being inlined at the
  callsite (#994)

Added

• Copy implementations for Level and LevelFilter (#992)

Thanks to new contributors @jyn514 and @TaKO8Ki for contributing
to this release!

tracing-subscriber 0.2.9

Fixed

• fmt: Fixed compilation failure on MSRV when the chrono feature
  is disabled (#844)

Added

• fmt: Span lookup methods defined by layer::Context are now also
  provided by FmtContext (#834)

Tracing 0.1.17

Changed

• log: Moved verbose span enter/exit log records to
  "tracing::span::active" target, allowing them to be filtered
  separately (#833)
• log: All span lifecycle log records without fields now have the
  Trace log filter, to guard against log users enabling them by
  default with blanket level filtering (#833)

Fixed

• log/macros: Fixed missing implicit imports of the
  tracing::field::debug and tracing::field::display functions inside
  the macros when the "log" feature is enabled (#835)