Go中函数名称之前的参数? [英] Parameter before the function name in Go?

问题描述

我看过一些Go函数定义如下:

I have seen some Go functions defined like this:

type poly struct {
    coeffs [256]uint16
}

func (p *poly) reset() {
    for i := range p.coeffs {
        p.coeffs[i] = 0
    }
}

稍后您可以通过以下方式致电

Which you can later call as:

var p poly
p.reset()

在我所知道的其他编程语言中，我还没有看到这一点.重置功能中 p * poly 的目的是什么?它看起来像一个函数参数，但写在函数名称之前.有任何澄清吗?

I haven't seen this in other programming languages that I know. What's the purpose of p *poly in the reset function? It seems to be like a function parameter but written before the function name. Any clarification for it?

推荐答案

这意味着 reset()是 * poly 上的一种方法.这是非常基本的Go；您确实需要从开始旅行开始.在没有基本了解其语法的情况下尝试阅读Go将会非常混乱.

It means that reset() is a method on *poly. This is very basic Go; you really need to start with the Go tour. Trying to read Go without a basic understanding of its syntax is going to be very confusing.

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