Function clippy_utils::capture_local_usage

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pub fn capture_local_usage(cx: &LateContext<'_>, e: &Expr<'_>) -> CaptureKind
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Given an expression referencing a local, determines how it would be captured in a closure. Note as this will walk up to parent expressions until the capture can be determined it should only be used while making a closure somewhere a value is consumed. e.g. a block, match arm, or function argument (other than a receiver).