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subscriber: impl Clone for EnvFilter #2956

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subscriber: impl Clone for EnvFilter #2956

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16 changes: 16 additions & 0 deletions tracing-subscriber/src/filter/env/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -204,6 +204,22 @@ pub struct EnvFilter {
regex: bool,
}

/// Creates an [`EnvFilter`] with the same directives as `self`. This does *not* clone any of the
/// dynamic state that [`EnvFilter`] acquires while attached to a subscriber.
impl Clone for EnvFilter {
fn clone(&self) -> EnvFilter {
EnvFilter {
statics: self.statics.clone(),
dynamics: self.dynamics.clone(),
has_dynamics: self.has_dynamics,
by_id: RwLock::new(Default::default()),
by_cs: RwLock::new(Default::default()),
scope: ThreadLocal::new(),
regex: self.regex,
}
}
}

type FieldMap<T> = HashMap<Field, T>;

/// Indicates that an error occurred while parsing a `EnvFilter` from an
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