typescript-function-generator-next-with-argument-demo's Introduction

TypeScript Function Generator Next with Argument Demo

Function generator中有一个非常迷惑人的语法：

const x = yield a+b

看起来似乎是把a+b的值赋给了x，实际上它们之间没有一毛钱关系。

当我们调用.next()的时候，代码会执行到const x = yield a+b的右段yield a+b，并且把值当作.next()的返回值返回给调用者，然后代码就停在那里了。

直到下一次调用.next，才会继续执行const x =。但是x的值从哪里来呢？是从.next(???)的参数???传进来的，x = ???, 然后继续执行到下一个yield，把它后面的值返回出去。

这一处是我之前一直没有理解的地方。

npm install
npm run demo

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