linux文件删除原理

1 方法集的作用

The method set of a type determines the interfaces that the type implements and the methods that can be called using a receiver of that type.

方法集的概念是对接口来说的，⽤实例value和pointer调⽤⽅法(含匿名字段)不受方法集约束，编译器总是查找全部⽅法，并⾃动转换receiver实参。

2 方法集定义

• The method set of an interface type is its interface.
• The method set of any other type T consists of all methods declared with receiver type T.
• The method set of the corresponding pointer type *T is the set of all methods declared with receiver *T or T (that is, it also contains the method set of T).

3 嵌入结构体方法集

Given a struct type S and a defined type T(anonymous field), promoted methods are included in the method set of the struct as follows:

• If S contains an embedded field T, the method sets of S and *S both include promoted methods with receiver T. The method set of *S also includes promoted methods with receiver *T.
• If S contains an embedded field *T, the method sets of S and *S both include promoted methods with receiver T or *T.

4 总结

sceneario	object value	object pointer
pointer method	yes	yes
value method	yes	yes
interface pointer method	no	yes
interface value method	yes	yes

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