Typescript 2.1.5不支持函数调用

问题描述

我有以下ngrx减速器功能

I have the following ngrx reducer function

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;
  }
};

运行该应用程序会出现以下错误:

Running the application gives the following error:

所指功能是

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

这是为什么，什么是解决方案.我认为这应该是合法的typescript2.1.5代码，但事实并非如此.

Why is this and what is the solution. I thinks this should be legitimate typescript2.1.5 code, but it does not seem that way.

谢谢

推荐答案

AoT需要静态分析某些代码，而不能分析函数调用.

AoT needs to statically analyze some code and can't analyze function invocations.

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

For more details about the limitations of AoT see https://github.com/qdouble/angular-webpack2-starter#aot--donts

有关讨论，请参见此问题 https://github.com/angular/angular/issues/11262

For a discussion see this issue https://github.com/angular/angular/issues/11262

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