angular - 不支持 Typescript 2.1.5 函数调用

Question

我有以下ngrx reducer函数

export const raceReducer: ActionReducer<IRace> = ( state: IRace = new Race(), action?: Action ) => {
  switch ( action.type ) {

    case RaceActions.ADD_OLP:
      return ngrxStateUpdater( state, action )

    default:
      return state;
  }
};

运行应用程序出现以下错误:

ERROR in Error encountered resolving symbol values statically. Function calls are not s upported. Consider replacing the function or lambda with a reference to an exported fun ction (position 40:50 in the original .ts file), resolving symbol raceReducer in J:/wor kspace/angular2/ts/epimss/src/app/registration/race/race.ngrx-store.ts, resolving symbo l AppModule in J:/workspace/angular2/ts/epimss/src/app/app.module.ts, resolving symbol AppModule in J:/workspace/angular2/ts/epimss/src/app/app.module.ts, resolving symbol Ap pModule in J:/workspace/angular2/ts/epimss/src/app/app.module.ts

所指的函数是

( state: IRace = new Race(), action?: Action )

这是为什么，解决方法是什么。我认为这应该是合法的 typescript2.1.5 代码，但它似乎不是这样。

谢谢

Answer 1

AoT需要静态分析部分代码，无法分析函数调用。

有关 AoT 限制的更多详细信息，请参阅 https://github.com/qdouble/angular-webpack2-starter#aot--donts

有关讨论，请参阅本期 https://github.com/angular/angular/issues/11262