A module defining the Metric trait and common metric backends.
| Advice | Re-export aspect-rs's types to avoid crates depending on it.
An Advice describes what the aspect should do on return
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| Counter | A trait for Counters
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| Enter | Re-export aspect-rs's types to avoid crates depending on it.
The Enter trait is called when entering in an aspect, before the wrapped expression is called.
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| Gauge | A trait for Gauges
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| Histogram | A trait for Histograms
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| Metric | A trait to implement to be used in the measure! macro
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| OnResult | Re-export aspect-rs's types to avoid crates depending on it.
The OnResult trait is implemented on Aspects to get notified when an expression has returned.
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