jotai/system/index.development.js

System.register(['react'], (function (exports) {
  'use strict';
  var createContext, useState, useEffect, useRef, createElement, useContext, useReducer, useDebugValue, useCallback;
  return {
    setters: [function (module) {
      createContext = module.createContext;
      useState = module.useState;
      useEffect = module.useEffect;
      useRef = module.useRef;
      createElement = module.createElement;
      useContext = module.useContext;
      useReducer = module.useReducer;
      useDebugValue = module.useDebugValue;
      useCallback = module.useCallback;
    }],
    execute: (function () {

      exports({
        atom: atom,
        useAtom: useAtom,
        useAtomValue: useAtomValue,
        useSetAtom: useSetAtom
      });

      const SUSPENSE_PROMISE = Symbol();
      const isSuspensePromise = (promise) => !!promise[SUSPENSE_PROMISE];
      const isSuspensePromiseAlreadyCancelled = (suspensePromise) => !suspensePromise[SUSPENSE_PROMISE].c;
      const cancelSuspensePromise = (suspensePromise) => {
        var _a;
        const { b: basePromise, c: cancelPromise } = suspensePromise[SUSPENSE_PROMISE];
        if (cancelPromise) {
          cancelPromise();
          (_a = promiseAbortMap.get(basePromise)) == null ? void 0 : _a();
        }
      };
      const isEqualSuspensePromise = (oldSuspensePromise, newSuspensePromise) => {
        const oldOriginalPromise = oldSuspensePromise[SUSPENSE_PROMISE].o;
        const newOriginalPromise = newSuspensePromise[SUSPENSE_PROMISE].o;
        return oldOriginalPromise === newOriginalPromise || oldSuspensePromise === newOriginalPromise || isSuspensePromise(oldOriginalPromise) && isEqualSuspensePromise(oldOriginalPromise, newSuspensePromise);
      };
      const createSuspensePromise = (basePromise, promise) => {
        const suspensePromiseExtra = {
          b: basePromise,
          o: promise,
          c: null
        };
        const suspensePromise = new Promise((resolve) => {
          suspensePromiseExtra.c = () => {
            suspensePromiseExtra.c = null;
            resolve();
          };
          promise.finally(suspensePromiseExtra.c);
        });
        suspensePromise[SUSPENSE_PROMISE] = suspensePromiseExtra;
        return suspensePromise;
      };
      const promiseAbortMap = /* @__PURE__ */ new WeakMap();
      const registerPromiseAbort = exports('SECRET_INTERNAL_registerPromiseAbort', (basePromise, abort) => {
        promiseAbortMap.set(basePromise, abort);
      });

      const hasInitialValue = (atom) => "init" in atom;
      const READ_ATOM = "r";
      const WRITE_ATOM = "w";
      const COMMIT_ATOM = "c";
      const SUBSCRIBE_ATOM = "s";
      const RESTORE_ATOMS = "h";
      const DEV_SUBSCRIBE_STATE = "n";
      const DEV_GET_MOUNTED_ATOMS = "l";
      const DEV_GET_ATOM_STATE = "a";
      const DEV_GET_MOUNTED = "m";
      const createStore = (initialValues) => {
        const committedAtomStateMap = /* @__PURE__ */ new WeakMap();
        const mountedMap = /* @__PURE__ */ new WeakMap();
        const pendingMap = /* @__PURE__ */ new Map();
        let stateListeners;
        let mountedAtoms;
        {
          stateListeners = /* @__PURE__ */ new Set();
          mountedAtoms = /* @__PURE__ */ new Set();
        }
        if (initialValues) {
          for (const [atom, value] of initialValues) {
            const atomState = {
              v: value,
              r: 0,
              y: true,
              d: /* @__PURE__ */ new Map()
            };
            {
              Object.freeze(atomState);
              if (!hasInitialValue(atom)) {
                console.warn(
                  "Found initial value for derived atom which can cause unexpected behavior",
                  atom
                );
              }
            }
            committedAtomStateMap.set(atom, atomState);
          }
        }
        const suspensePromiseCacheMap = /* @__PURE__ */ new WeakMap();
        const addSuspensePromiseToCache = (version, atom, suspensePromise) => {
          let cache = suspensePromiseCacheMap.get(atom);
          if (!cache) {
            cache = /* @__PURE__ */ new Map();
            suspensePromiseCacheMap.set(atom, cache);
          }
          suspensePromise.then(() => {
            if (cache.get(version) === suspensePromise) {
              cache.delete(version);
              if (!cache.size) {
                suspensePromiseCacheMap.delete(atom);
              }
            }
          });
          cache.set(version, suspensePromise);
        };
        const cancelAllSuspensePromiseInCache = (atom) => {
          const versionSet = /* @__PURE__ */ new Set();
          const cache = suspensePromiseCacheMap.get(atom);
          if (cache) {
            suspensePromiseCacheMap.delete(atom);
            cache.forEach((suspensePromise, version) => {
              cancelSuspensePromise(suspensePromise);
              versionSet.add(version);
            });
          }
          return versionSet;
        };
        const versionedAtomStateMapMap = /* @__PURE__ */ new WeakMap();
        const getVersionedAtomStateMap = (version) => {
          let versionedAtomStateMap = versionedAtomStateMapMap.get(version);
          if (!versionedAtomStateMap) {
            versionedAtomStateMap = /* @__PURE__ */ new Map();
            versionedAtomStateMapMap.set(version, versionedAtomStateMap);
          }
          return versionedAtomStateMap;
        };
        const getAtomState = (version, atom) => {
          if (version) {
            const versionedAtomStateMap = getVersionedAtomStateMap(version);
            let atomState = versionedAtomStateMap.get(atom);
            if (!atomState) {
              atomState = getAtomState(version.p, atom);
              if (atomState) {
                versionedAtomStateMap.set(atom, atomState);
              }
            }
            return atomState;
          }
          return committedAtomStateMap.get(atom);
        };
        const setAtomState = (version, atom, atomState) => {
          {
            Object.freeze(atomState);
          }
          if (version) {
            const versionedAtomStateMap = getVersionedAtomStateMap(version);
            versionedAtomStateMap.set(atom, atomState);
          } else {
            const prevAtomState = committedAtomStateMap.get(atom);
            committedAtomStateMap.set(atom, atomState);
            if (!pendingMap.has(atom)) {
              pendingMap.set(atom, prevAtomState);
            }
          }
        };
        const createReadDependencies = (version, prevReadDependencies = /* @__PURE__ */ new Map(), dependencies) => {
          if (!dependencies) {
            return prevReadDependencies;
          }
          const readDependencies = /* @__PURE__ */ new Map();
          let changed = false;
          dependencies.forEach((atom) => {
            var _a;
            const revision = ((_a = getAtomState(version, atom)) == null ? void 0 : _a.r) || 0;
            readDependencies.set(atom, revision);
            if (prevReadDependencies.get(atom) !== revision) {
              changed = true;
            }
          });
          if (prevReadDependencies.size === readDependencies.size && !changed) {
            return prevReadDependencies;
          }
          return readDependencies;
        };
        const setAtomValue = (version, atom, value, dependencies, suspensePromise) => {
          const atomState = getAtomState(version, atom);
          if (atomState) {
            if (suspensePromise && (!("p" in atomState) || !isEqualSuspensePromise(atomState.p, suspensePromise))) {
              return atomState;
            }
            if ("p" in atomState) {
              cancelSuspensePromise(atomState.p);
            }
          }
          const nextAtomState = {
            v: value,
            r: (atomState == null ? void 0 : atomState.r) || 0,
            y: true,
            d: createReadDependencies(version, atomState == null ? void 0 : atomState.d, dependencies)
          };
          let changed = !(atomState == null ? void 0 : atomState.y);
          if (!atomState || !("v" in atomState) || !Object.is(atomState.v, value)) {
            changed = true;
            ++nextAtomState.r;
            if (nextAtomState.d.has(atom)) {
              nextAtomState.d = new Map(nextAtomState.d).set(atom, nextAtomState.r);
            }
          } else if (nextAtomState.d !== atomState.d && (nextAtomState.d.size !== atomState.d.size || !Array.from(nextAtomState.d.keys()).every((a) => atomState.d.has(a)))) {
            changed = true;
            Promise.resolve().then(() => {
              flushPending(version);
            });
          }
          if (atomState && !changed) {
            return atomState;
          }
          setAtomState(version, atom, nextAtomState);
          return nextAtomState;
        };
        const setAtomReadError = (version, atom, error, dependencies, suspensePromise) => {
          const atomState = getAtomState(version, atom);
          if (atomState) {
            if (suspensePromise && (!("p" in atomState) || !isEqualSuspensePromise(atomState.p, suspensePromise))) {
              return atomState;
            }
            if ("p" in atomState) {
              cancelSuspensePromise(atomState.p);
            }
          }
          const nextAtomState = {
            e: error,
            r: ((atomState == null ? void 0 : atomState.r) || 0) + 1,
            y: true,
            d: createReadDependencies(version, atomState == null ? void 0 : atomState.d, dependencies)
          };
          setAtomState(version, atom, nextAtomState);
          return nextAtomState;
        };
        const setAtomSuspensePromise = (version, atom, suspensePromise, dependencies) => {
          const atomState = getAtomState(version, atom);
          if (atomState && "p" in atomState) {
            if (isEqualSuspensePromise(atomState.p, suspensePromise)) {
              if (!atomState.y) {
                return { ...atomState, y: true };
              }
              return atomState;
            }
            cancelSuspensePromise(atomState.p);
          }
          addSuspensePromiseToCache(version, atom, suspensePromise);
          const nextAtomState = {
            p: suspensePromise,
            r: ((atomState == null ? void 0 : atomState.r) || 0) + 1,
            y: true,
            d: createReadDependencies(version, atomState == null ? void 0 : atomState.d, dependencies)
          };
          setAtomState(version, atom, nextAtomState);
          return nextAtomState;
        };
        const setAtomPromiseOrValue = (version, atom, promiseOrValue, dependencies) => {
          if (promiseOrValue instanceof Promise) {
            const suspensePromise = createSuspensePromise(
              promiseOrValue,
              promiseOrValue.then((value) => {
                setAtomValue(version, atom, value, dependencies, suspensePromise);
              }).catch((e) => {
                if (e instanceof Promise) {
                  if (isSuspensePromise(e)) {
                    return e.then(() => {
                      readAtomState(version, atom, true);
                    });
                  }
                  return e;
                }
                setAtomReadError(version, atom, e, dependencies, suspensePromise);
              })
            );
            return setAtomSuspensePromise(
              version,
              atom,
              suspensePromise,
              dependencies
            );
          }
          return setAtomValue(
            version,
            atom,
            promiseOrValue,
            dependencies
          );
        };
        const setAtomInvalidated = (version, atom) => {
          const atomState = getAtomState(version, atom);
          if (atomState) {
            const nextAtomState = {
              ...atomState,
              y: false
            };
            setAtomState(version, atom, nextAtomState);
          } else {
            console.warn("[Bug] could not invalidate non existing atom", atom);
          }
        };
        const readAtomState = (version, atom, force) => {
          if (!force) {
            const atomState = getAtomState(version, atom);
            if (atomState) {
              if (atomState.y && "p" in atomState && !isSuspensePromiseAlreadyCancelled(atomState.p)) {
                return atomState;
              }
              atomState.d.forEach((_, a) => {
                if (a !== atom) {
                  if (!mountedMap.has(a)) {
                    readAtomState(version, a);
                  } else {
                    const aState = getAtomState(version, a);
                    if (aState && !aState.y) {
                      readAtomState(version, a);
                    }
                  }
                }
              });
              if (Array.from(atomState.d).every(([a, r]) => {
                const aState = getAtomState(version, a);
                return aState && !("p" in aState) && aState.r === r;
              })) {
                if (!atomState.y) {
                  return { ...atomState, y: true };
                }
                return atomState;
              }
            }
          }
          const dependencies = /* @__PURE__ */ new Set();
          try {
            const promiseOrValue = atom.read((a) => {
              dependencies.add(a);
              const aState = a === atom ? getAtomState(version, a) : readAtomState(version, a);
              if (aState) {
                if ("e" in aState) {
                  throw aState.e;
                }
                if ("p" in aState) {
                  throw aState.p;
                }
                return aState.v;
              }
              if (hasInitialValue(a)) {
                return a.init;
              }
              throw new Error("no atom init");
            });
            return setAtomPromiseOrValue(version, atom, promiseOrValue, dependencies);
          } catch (errorOrPromise) {
            if (errorOrPromise instanceof Promise) {
              const suspensePromise = createSuspensePromise(
                errorOrPromise,
                errorOrPromise
              );
              return setAtomSuspensePromise(
                version,
                atom,
                suspensePromise,
                dependencies
              );
            }
            return setAtomReadError(version, atom, errorOrPromise, dependencies);
          }
        };
        const readAtom = (readingAtom, version) => {
          const atomState = readAtomState(version, readingAtom);
          return atomState;
        };
        const addAtom = (version, addingAtom) => {
          let mounted = mountedMap.get(addingAtom);
          if (!mounted) {
            mounted = mountAtom(version, addingAtom);
          }
          return mounted;
        };
        const canUnmountAtom = (atom, mounted) => !mounted.l.size && (!mounted.t.size || mounted.t.size === 1 && mounted.t.has(atom));
        const delAtom = (version, deletingAtom) => {
          const mounted = mountedMap.get(deletingAtom);
          if (mounted && canUnmountAtom(deletingAtom, mounted)) {
            unmountAtom(version, deletingAtom);
          }
        };
        const invalidateDependents = (version, atom) => {
          const mounted = mountedMap.get(atom);
          mounted == null ? void 0 : mounted.t.forEach((dependent) => {
            if (dependent !== atom) {
              setAtomInvalidated(version, dependent);
              invalidateDependents(version, dependent);
            }
          });
        };
        const writeAtomState = (version, atom, update) => {
          let isSync = true;
          const writeGetter = (a, options) => {
            const aState = readAtomState(version, a);
            if ("e" in aState) {
              throw aState.e;
            }
            if ("p" in aState) {
              if (options == null ? void 0 : options.unstable_promise) {
                return aState.p.then(() => {
                  const s = getAtomState(version, a);
                  if (s && "p" in s && s.p === aState.p) {
                    return new Promise((resolve) => setTimeout(resolve)).then(
                      () => writeGetter(a, options)
                    );
                  }
                  return writeGetter(a, options);
                });
              }
              {
                console.info(
                  "Reading pending atom state in write operation. We throw a promise for now.",
                  a
                );
              }
              throw aState.p;
            }
            if ("v" in aState) {
              return aState.v;
            }
            {
              console.warn(
                "[Bug] no value found while reading atom in write operation. This is probably a bug.",
                a
              );
            }
            throw new Error("no value found");
          };
          const setter = (a, v) => {
            let promiseOrVoid2;
            if (a === atom) {
              if (!hasInitialValue(a)) {
                throw new Error("atom not writable");
              }
              const versionSet = cancelAllSuspensePromiseInCache(a);
              versionSet.forEach((cancelledVersion) => {
                if (cancelledVersion !== version) {
                  setAtomPromiseOrValue(cancelledVersion, a, v);
                }
              });
              const prevAtomState = getAtomState(version, a);
              const nextAtomState = setAtomPromiseOrValue(version, a, v);
              if (prevAtomState !== nextAtomState) {
                invalidateDependents(version, a);
              }
            } else {
              promiseOrVoid2 = writeAtomState(version, a, v);
            }
            if (!isSync) {
              flushPending(version);
            }
            return promiseOrVoid2;
          };
          const promiseOrVoid = atom.write(writeGetter, setter, update);
          isSync = false;
          return promiseOrVoid;
        };
        const writeAtom = (writingAtom, update, version) => {
          const promiseOrVoid = writeAtomState(version, writingAtom, update);
          flushPending(version);
          return promiseOrVoid;
        };
        const isActuallyWritableAtom = (atom) => !!atom.write;
        const mountAtom = (version, atom, initialDependent) => {
          const mounted = {
            t: new Set(initialDependent && [initialDependent]),
            l: /* @__PURE__ */ new Set()
          };
          mountedMap.set(atom, mounted);
          {
            mountedAtoms.add(atom);
          }
          const atomState = readAtomState(void 0, atom);
          atomState.d.forEach((_, a) => {
            const aMounted = mountedMap.get(a);
            if (aMounted) {
              aMounted.t.add(atom);
            } else {
              if (a !== atom) {
                mountAtom(version, a, atom);
              }
            }
          });
          if (isActuallyWritableAtom(atom) && atom.onMount) {
            const setAtom = (update) => writeAtom(atom, update, version);
            const onUnmount = atom.onMount(setAtom);
            version = void 0;
            if (onUnmount) {
              mounted.u = onUnmount;
            }
          }
          return mounted;
        };
        const unmountAtom = (version, atom) => {
          var _a;
          const onUnmount = (_a = mountedMap.get(atom)) == null ? void 0 : _a.u;
          if (onUnmount) {
            onUnmount();
          }
          mountedMap.delete(atom);
          {
            mountedAtoms.delete(atom);
          }
          const atomState = getAtomState(version, atom);
          if (atomState) {
            if ("p" in atomState) {
              cancelSuspensePromise(atomState.p);
            }
            atomState.d.forEach((_, a) => {
              if (a !== atom) {
                const mounted = mountedMap.get(a);
                if (mounted) {
                  mounted.t.delete(atom);
                  if (canUnmountAtom(a, mounted)) {
                    unmountAtom(version, a);
                  }
                }
              }
            });
          } else {
            console.warn("[Bug] could not find atom state to unmount", atom);
          }
        };
        const mountDependencies = (version, atom, atomState, prevReadDependencies) => {
          const dependencies = new Set(atomState.d.keys());
          prevReadDependencies == null ? void 0 : prevReadDependencies.forEach((_, a) => {
            if (dependencies.has(a)) {
              dependencies.delete(a);
              return;
            }
            const mounted = mountedMap.get(a);
            if (mounted) {
              mounted.t.delete(atom);
              if (canUnmountAtom(a, mounted)) {
                unmountAtom(version, a);
              }
            }
          });
          dependencies.forEach((a) => {
            const mounted = mountedMap.get(a);
            if (mounted) {
              mounted.t.add(atom);
            } else if (mountedMap.has(atom)) {
              mountAtom(version, a, atom);
            }
          });
        };
        const flushPending = (version) => {
          if (version) {
            const versionedAtomStateMap = getVersionedAtomStateMap(version);
            versionedAtomStateMap.forEach((atomState, atom) => {
              const committedAtomState = committedAtomStateMap.get(atom);
              if (atomState !== committedAtomState) {
                const mounted = mountedMap.get(atom);
                mounted == null ? void 0 : mounted.l.forEach((listener) => listener(version));
              }
            });
            return;
          }
          while (pendingMap.size) {
            const pending = Array.from(pendingMap);
            pendingMap.clear();
            pending.forEach(([atom, prevAtomState]) => {
              const atomState = getAtomState(void 0, atom);
              if (atomState && atomState.d !== (prevAtomState == null ? void 0 : prevAtomState.d)) {
                mountDependencies(void 0, atom, atomState, prevAtomState == null ? void 0 : prevAtomState.d);
              }
              if (prevAtomState && !prevAtomState.y && (atomState == null ? void 0 : atomState.y)) {
                return;
              }
              const mounted = mountedMap.get(atom);
              mounted == null ? void 0 : mounted.l.forEach((listener) => listener());
            });
          }
          {
            stateListeners.forEach((l) => l());
          }
        };
        const commitVersionedAtomStateMap = (version) => {
          const versionedAtomStateMap = getVersionedAtomStateMap(version);
          versionedAtomStateMap.forEach((atomState, atom) => {
            const prevAtomState = committedAtomStateMap.get(atom);
            if (!prevAtomState || atomState.r > prevAtomState.r || atomState.y !== prevAtomState.y || atomState.r === prevAtomState.r && atomState.d !== prevAtomState.d) {
              committedAtomStateMap.set(atom, atomState);
              if (atomState.d !== (prevAtomState == null ? void 0 : prevAtomState.d)) {
                mountDependencies(version, atom, atomState, prevAtomState == null ? void 0 : prevAtomState.d);
              }
            }
          });
        };
        const commitAtom = (_atom, version) => {
          if (version) {
            commitVersionedAtomStateMap(version);
          }
          flushPending(void 0);
        };
        const subscribeAtom = (atom, callback, version) => {
          const mounted = addAtom(version, atom);
          const listeners = mounted.l;
          listeners.add(callback);
          return () => {
            listeners.delete(callback);
            delAtom(version, atom);
          };
        };
        const restoreAtoms = (values, version) => {
          for (const [atom, value] of values) {
            if (hasInitialValue(atom)) {
              setAtomPromiseOrValue(version, atom, value);
              invalidateDependents(version, atom);
            }
          }
          flushPending(version);
        };
        {
          return {
            [READ_ATOM]: readAtom,
            [WRITE_ATOM]: writeAtom,
            [COMMIT_ATOM]: commitAtom,
            [SUBSCRIBE_ATOM]: subscribeAtom,
            [RESTORE_ATOMS]: restoreAtoms,
            [DEV_SUBSCRIBE_STATE]: (l) => {
              stateListeners.add(l);
              return () => {
                stateListeners.delete(l);
              };
            },
            [DEV_GET_MOUNTED_ATOMS]: () => mountedAtoms.values(),
            [DEV_GET_ATOM_STATE]: (a) => committedAtomStateMap.get(a),
            [DEV_GET_MOUNTED]: (a) => mountedMap.get(a)
          };
        }
      };
      const createStoreForExport = exports('unstable_createStore', (initialValues) => {
        const store = createStore(initialValues);
        const get = (atom) => {
          const atomState = store[READ_ATOM](atom);
          if ("e" in atomState) {
            throw atomState.e;
          }
          if ("p" in atomState) {
            return void 0;
          }
          return atomState.v;
        };
        const asyncGet = (atom) => new Promise((resolve, reject) => {
          const atomState = store[READ_ATOM](atom);
          if ("e" in atomState) {
            reject(atomState.e);
          } else if ("p" in atomState) {
            resolve(atomState.p.then(() => asyncGet(atom)));
          } else {
            resolve(atomState.v);
          }
        });
        const set = (atom, update) => store[WRITE_ATOM](atom, update);
        const sub = (atom, callback) => store[SUBSCRIBE_ATOM](atom, callback);
        return {
          get,
          asyncGet,
          set,
          sub,
          SECRET_INTERNAL_store: store
        };
      });

      const createScopeContainer = (initialValues, unstable_createStore) => {
        const store = unstable_createStore ? unstable_createStore(initialValues).SECRET_INTERNAL_store : createStore(initialValues);
        return { s: store };
      };
      const ScopeContextMap = /* @__PURE__ */ new Map();
      const getScopeContext = exports('SECRET_INTERNAL_getScopeContext', (scope) => {
        if (!ScopeContextMap.has(scope)) {
          ScopeContextMap.set(scope, createContext(createScopeContainer()));
        }
        return ScopeContextMap.get(scope);
      });

      const Provider = exports('Provider', ({
        children,
        initialValues,
        scope,
        unstable_createStore,
        unstable_enableVersionedWrite
      }) => {
        const [version, setVersion] = useState({});
        useEffect(() => {
          const scopeContainer = scopeContainerRef.current;
          if (scopeContainer.w) {
            scopeContainer.s[COMMIT_ATOM](null, version);
            delete version.p;
            scopeContainer.v = version;
          }
        }, [version]);
        const scopeContainerRef = useRef();
        if (!scopeContainerRef.current) {
          const scopeContainer = createScopeContainer(
            initialValues,
            unstable_createStore
          );
          if (unstable_enableVersionedWrite) {
            let retrying = 0;
            scopeContainer.w = (write) => {
              setVersion((parentVersion) => {
                const nextVersion = retrying ? parentVersion : { p: parentVersion };
                write(nextVersion);
                return nextVersion;
              });
            };
            scopeContainer.v = version;
            scopeContainer.r = (fn) => {
              ++retrying;
              fn();
              --retrying;
            };
          }
          scopeContainerRef.current = scopeContainer;
        }
        const ScopeContainerContext = getScopeContext(scope);
        return createElement(
          ScopeContainerContext.Provider,
          {
            value: scopeContainerRef.current
          },
          children
        );
      });

      let keyCount = 0;
      function atom(read, write) {
        const key = `atom${++keyCount}`;
        const config = {
          toString: () => key
        };
        if (typeof read === "function") {
          config.read = read;
        } else {
          config.init = read;
          config.read = (get) => get(config);
          config.write = (get, set, update) => set(config, typeof update === "function" ? update(get(config)) : update);
        }
        if (write) {
          config.write = write;
        }
        return config;
      }

      function useAtomValue(atom, scope) {
        const ScopeContext = getScopeContext(scope);
        const scopeContainer = useContext(ScopeContext);
        const { s: store, v: versionFromProvider } = scopeContainer;
        const getAtomValue = (version2) => {
          const atomState = store[READ_ATOM](atom, version2);
          if (!atomState.y) {
            throw new Error("should not be invalidated");
          }
          if ("e" in atomState) {
            throw atomState.e;
          }
          if ("p" in atomState) {
            throw atomState.p;
          }
          if ("v" in atomState) {
            return atomState.v;
          }
          throw new Error("no atom value");
        };
        const [[version, valueFromReducer, atomFromReducer], rerenderIfChanged] = useReducer(
          (prev, nextVersion) => {
            const nextValue = getAtomValue(nextVersion);
            if (Object.is(prev[1], nextValue) && prev[2] === atom) {
              return prev;
            }
            return [nextVersion, nextValue, atom];
          },
          versionFromProvider,
          (initialVersion) => {
            const initialValue = getAtomValue(initialVersion);
            return [initialVersion, initialValue, atom];
          }
        );
        let value = valueFromReducer;
        if (atomFromReducer !== atom) {
          rerenderIfChanged(version);
          value = getAtomValue(version);
        }
        useEffect(() => {
          const { v: versionFromProvider2 } = scopeContainer;
          if (versionFromProvider2) {
            store[COMMIT_ATOM](atom, versionFromProvider2);
          }
          const unsubscribe = store[SUBSCRIBE_ATOM](
            atom,
            rerenderIfChanged,
            versionFromProvider2
          );
          rerenderIfChanged(versionFromProvider2);
          return unsubscribe;
        }, [store, atom, scopeContainer]);
        useEffect(() => {
          store[COMMIT_ATOM](atom, version);
        });
        useDebugValue(value);
        return value;
      }

      function useSetAtom(atom, scope) {
        const ScopeContext = getScopeContext(scope);
        const { s: store, w: versionedWrite } = useContext(ScopeContext);
        const setAtom = useCallback(
          (update) => {
            if (!("write" in atom)) {
              throw new Error("not writable atom");
            }
            const write = (version) => store[WRITE_ATOM](atom, update, version);
            return versionedWrite ? versionedWrite(write) : write();
          },
          [store, versionedWrite, atom]
        );
        return setAtom;
      }

      function useAtom(atom, scope) {
        if ("scope" in atom) {
          console.warn(
            "atom.scope is deprecated. Please do useAtom(atom, scope) instead."
          );
          scope = atom.scope;
        }
        return [
          useAtomValue(atom, scope),
          useSetAtom(atom, scope)
        ];
      }

    })
  };
}));