Function make

packages/effect/src/internal/metric.ts:51–76

(
  keyType: Type,
  unsafeUpdate: (input: In, extraTags: ReadonlyArray<MetricLabel.MetricLabel>) => void,
  unsafeValue: (extraTags: ReadonlyArray<MetricLabel.MetricLabel>) => Out,
  unsafeModify: (input: In, extraTags: ReadonlyArray<MetricLabel.MetricLabel>) => void
)

/** @internal */
export const make: Metric.MetricApply = function<Type, In, Out>(
  keyType: Type,
  unsafeUpdate: (input: In, extraTags: ReadonlyArray<MetricLabel.MetricLabel>) => void,
  unsafeValue: (extraTags: ReadonlyArray<MetricLabel.MetricLabel>) => Out,
  unsafeModify: (input: In, extraTags: ReadonlyArray<MetricLabel.MetricLabel>) => void
): Metric.Metric<Type, In, Out> {
  const metric: Metric.Metric<Type, In, Out> = Object.assign(
    <A extends In, E, R>(effect: Effect.Effect<A, E, R>): Effect.Effect<A, E, R> =>
      core.tap(effect, (a) => update(metric, a)),
    {
      [MetricTypeId]: metricVariance,
      keyType,
      unsafeUpdate,
      unsafeValue,
      unsafeModify,
      register() {
        this.unsafeValue([])
        return this as any
      },
      pipe() {
        return pipeArguments(this, arguments)
      }
    } as const
  )
  return metric
}

/** @internal */
export const mapInput = dual<