GoLang，MethodName前括号里的内容是什么？

Question

func (t *T) MethodName(argType T1, replyType *T2) error

MethodName 前括号内的内容是什么？我是说这个 (t *T)

这来自这里:http://golang.org/pkg/net/rpc/我试图理解 golang rpc 并看到了这个方法定义。

谢谢，

Answer 1

The Go Programming Language Specification

Method declarations

A method is a function with a receiver. A method declaration binds an identifier, the method name, to a method, and associates the method with the receiver's base type.

Given type Point, the declarations

func (p *Point) Length() float64 {
    return math.Sqrt(p.x * p.x + p.y * p.y)
}

func (p *Point) Scale(factor float64) {
    p.x *= factor
    p.y *= factor
}

bind the methods Length and Scale, with receiver type *Point, to the base type.

它是方法接收者。