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core: impl<C: Collect + ?Sized> Collect for Box<C>, Arc<C> (#2161)

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These broader impls supersede the previous impls where the inner type was a
`dyn Collect`. With these generic impls, you no longer must (but still can,
if you wish) cast the inner type of a boxed or arc'd collector to
`dyn Collect` to use it as a `Collect`.
This commit is contained in:
Jack Wrenn
2022-06-16 16:27:35 -04:00
committed by GitHub
parent af5edf863c
commit 68bc91f28f
1 changed files with 8 additions and 2 deletions
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10
tracing-core/src/collect.rs
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@@ -654,7 +654,10 @@ impl Collect for NoCollector {
}
#[cfg(feature = "alloc")]
impl Collect for alloc::boxed::Box<dyn Collect + Send + Sync + 'static> {
impl<C> Collect for alloc::boxed::Box<C>
where
C: Collect + ?Sized,
{
#[inline]
fn register_callsite(&self, metadata: &'static Metadata<'static>) -> Interest {
self.as_ref().register_callsite(metadata)
@@ -725,7 +728,10 @@ impl Collect for alloc::boxed::Box<dyn Collect + Send + Sync + 'static> {
}
#[cfg(feature = "alloc")]
impl Collect for alloc::sync::Arc<dyn Collect + Send + Sync + 'static> {
impl<C> Collect for alloc::sync::Arc<C>
where
C: Collect + ?Sized,
{
#[inline]
fn register_callsite(&self, metadata: &'static Metadata<'static>) -> Interest {
self.as_ref().register_callsite(metadata)