Struct tower::util::error::optional::None [−][src]
pub struct None(_);
This is supported on crate feature
util
only.Error returned if the inner Service
has not been set.
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for None
impl RefUnwindSafe for None
impl UnwindSafe for None
impl UnwindSafe for None
Blanket Implementations
impl<T> Instrument for T
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impl<T> Instrument for T
[src]pub fn instrument(self, span: Span) -> Instrumented<Self>
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pub fn in_current_span(self) -> Instrumented<Self>
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impl<V, T> VZip<V> for T where
V: MultiLane<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,