这个golang代码是做什么的？ [英] What does this golang code do?

问题描述

我正在读DigitalOcean的golang客户端。我注意到他们在 _ 变量中创建了一个* Op结构的实例。例如：
https://github.com/digitalocean/godo /blob/master/droplets.go#L32

  var _ DropletsService =& DropletsServiceOp {} 
  

为什么需要这一行？

解决方案

这行是编译时检查 * DropletsServiceOp 满足 DropletsService 接口。

该行对程序的执行没有影响。 b

I was reading DigitalOcean's golang client. I noticed that they create an instance of their *Op struct in a _ variable. Example: https://github.com/digitalocean/godo/blob/master/droplets.go#L32

var _ DropletsService = &DropletsServiceOp{}

Why is this line needed?

解决方案

This line is a compile time check that *DropletsServiceOp satisfies the DropletsService interface.

The line has no effect on the execution of the program.

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