const NOOP = () => {
};
const isArray = Array.isArray;
const isFunction = (val) => typeof val === "function";
const isSymbol = (val) => typeof val === "symbol";
let activeEffectScope;
function recordEffectScope(effect, scope = activeEffectScope) {
  if (scope && scope.active) {
    scope.effects.push(effect);
  }
}
const createDep = (effects) => {
  const dep = new Set(effects);
  dep.w = 0;
  dep.n = 0;
  return dep;
};
const wasTracked = (dep) => (dep.w & trackOpBit) > 0;
const newTracked = (dep) => (dep.n & trackOpBit) > 0;
const initDepMarkers = ({ deps }) => {
  if (deps.length) {
    for (let i = 0; i < deps.length; i++) {
      deps[i].w |= trackOpBit;
    }
  }
};
const finalizeDepMarkers = (effect) => {
  const { deps } = effect;
  if (deps.length) {
    let ptr = 0;
    for (let i = 0; i < deps.length; i++) {
      const dep = deps[i];
      if (wasTracked(dep) && !newTracked(dep)) {
        dep.delete(effect);
      } else {
        deps[ptr++] = dep;
      }
      dep.w &= ~trackOpBit;
      dep.n &= ~trackOpBit;
    }
    deps.length = ptr;
  }
};
let effectTrackDepth = 0;
let trackOpBit = 1;
const maxMarkerBits = 30;
let activeEffect;
class ReactiveEffect {
  constructor(fn, scheduler = null, scope) {
    this.fn = fn;
    this.scheduler = scheduler;
    this.active = true;
    this.deps = [];
    this.parent = void 0;
    recordEffectScope(this, scope);
  }
  run() {
    if (!this.active) {
      return this.fn();
    }
    let parent = activeEffect;
    let lastShouldTrack = shouldTrack;
    while (parent) {
      if (parent === this) {
        return;
      }
      parent = parent.parent;
    }
    try {
      this.parent = activeEffect;
      activeEffect = this;
      shouldTrack = true;
      trackOpBit = 1 << ++effectTrackDepth;
      if (effectTrackDepth <= maxMarkerBits) {
        initDepMarkers(this);
      } else {
        cleanupEffect(this);
      }
      return this.fn();
    } finally {
      if (effectTrackDepth <= maxMarkerBits) {
        finalizeDepMarkers(this);
      }
      trackOpBit = 1 << --effectTrackDepth;
      activeEffect = this.parent;
      shouldTrack = lastShouldTrack;
      this.parent = void 0;
      if (this.deferStop) {
        this.stop();
      }
    }
  }
  stop() {
    if (activeEffect === this) {
      this.deferStop = true;
    } else if (this.active) {
      cleanupEffect(this);
      if (this.onStop) {
        this.onStop();
      }
      this.active = false;
    }
  }
}
function cleanupEffect(effect) {
  const { deps } = effect;
  if (deps.length) {
    for (let i = 0; i < deps.length; i++) {
      deps[i].delete(effect);
    }
    deps.length = 0;
  }
}
let shouldTrack = true;
function trackEffects(dep, debuggerEventExtraInfo) {
  let shouldTrack2 = false;
  if (effectTrackDepth <= maxMarkerBits) {
    if (!newTracked(dep)) {
      dep.n |= trackOpBit;
      shouldTrack2 = !wasTracked(dep);
    }
  } else {
    shouldTrack2 = !dep.has(activeEffect);
  }
  if (shouldTrack2) {
    dep.add(activeEffect);
    activeEffect.deps.push(dep);
  }
}
function triggerEffects(dep, debuggerEventExtraInfo) {
  const effects = isArray(dep) ? dep : [...dep];
  for (const effect of effects) {
    if (effect.computed) {
      triggerEffect(effect);
    }
  }
  for (const effect of effects) {
    if (!effect.computed) {
      triggerEffect(effect);
    }
  }
}
function triggerEffect(effect, debuggerEventExtraInfo) {
  if (effect !== activeEffect || effect.allowRecurse) {
    if (effect.scheduler) {
      effect.scheduler();
    } else {
      effect.run();
    }
  }
}
new Set(/* @__PURE__ */ Object.getOwnPropertyNames(Symbol).filter((key) => key !== "arguments" && key !== "caller").map((key) => Symbol[key]).filter(isSymbol));
function toRaw(observed) {
  const raw = observed && observed["__v_raw"];
  return raw ? toRaw(raw) : observed;
}
function trackRefValue(ref) {
  if (shouldTrack && activeEffect) {
    ref = toRaw(ref);
    {
      trackEffects(ref.dep || (ref.dep = createDep()));
    }
  }
}
function triggerRefValue(ref, newVal) {
  ref = toRaw(ref);
  if (ref.dep) {
    {
      triggerEffects(ref.dep);
    }
  }
}
class ComputedRefImpl {
  constructor(getter, _setter, isReadonly, isSSR) {
    this._setter = _setter;
    this.dep = void 0;
    this.__v_isRef = true;
    this._dirty = true;
    this.effect = new ReactiveEffect(getter, () => {
      if (!this._dirty) {
        this._dirty = true;
        triggerRefValue(this);
      }
    });
    this.effect.computed = this;
    this.effect.active = this._cacheable = !isSSR;
    this["__v_isReadonly"] = isReadonly;
  }
  get value() {
    const self = toRaw(this);
    trackRefValue(self);
    if (self._dirty || !self._cacheable) {
      self._dirty = false;
      self._value = self.effect.run();
    }
    return self._value;
  }
  set value(newValue) {
    this._setter(newValue);
  }
}
function computed(getterOrOptions, debugOptions, isSSR = false) {
  let getter;
  let setter;
  const onlyGetter = isFunction(getterOrOptions);
  if (onlyGetter) {
    getter = getterOrOptions;
    setter = NOOP;
  } else {
    getter = getterOrOptions.get;
    setter = getterOrOptions.set;
  }
  const cRef = new ComputedRefImpl(getter, setter, onlyGetter || !setter, isSSR);
  return cRef;
}
export { computed as c };