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package stm
// Retry is a sentinel value. When thrown via panic, it indicates that a
// transaction should be retried.
const Retry = "retry"
// catchRetry returns true if fn calls tx.Retry.
func catchRetry(fn Operation, tx *Tx) (result interface{}, retry bool) {
defer func() {
if r := recover(); r == Retry {
retry = true
} else if r != nil {
panic(r)
}
}()
result = fn(tx)
return
}
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