typeitabstruct{inter*interfacetype_type*_typehashuint32// copy of _type.hash. Used for type switches._[4]bytefun[1]uintptr// variable sized. fun[0]==0 means _type does not implement inter.} itab中inter 字段就是一个 接口类型: typeinterfacetypestruct{typ_typepkgpathnamemhdr[]imethod} ...
typeifacestruct{tab*itab data unsafe.Pointer}typeefacestruct{_type*_type data unsafe.Pointer}typeitabstruct{inter*interfacetype _type*_type hashuint32// copy of _type.hash. Used for type switches._[4]bytefun[1]uintptr// variable sized. fun[0]==0 means _type does not implement inter....
inter*interfacetype//包含函数的声明_type *_type hash uint32//copy of _type.hash. Used for type switches._ [4]bytefun [1]uintptr//variable sized. fun[0]==0 means _type does not implement inter.//函数的具体实现,如果 fun[0] == 0, 移位着没有实现 interfacettpe 中声明的函数} type ...
fun[0]==0 means _type does not implement inter. } runtime._type,代码如下 // _type 实际上是描述 Go 语言中各种数据类型的结构体 // 其余很多类型都是基于这个结构体进行管理 type _type struct { size uintptr // 类型占用的内存空间大小 ptrdata uintptr // size of memory prefix holding all...
[4]byte// 赋值变量,即接口实现者的方法地址,这里虽然定义了数组长度为1,并不表示只能有1个方法// fun是第一个方法的地址,因为方法的地址是一个指针地址,占用固定的8个字节,所以后面的// 方法的地址可以根据fun偏移计算得到fun[1]uintptr// variable sized. fun[0]==0 means _type does not implement ...
cannot use Cat literal (typeCat) astypeAnimal in array or slice literal: Cat does not implement Animal (Speak method has pointer receiver) 该错误的意思是:你尝试将Cat转为Animal,但是只有*Cat类型实现了该接口。你可以通过传入一个指针 (new(Cat)或者&Cat{})来修复这个错误。
(a) is included in the normal form of packaging a Major Component, but which is not part of that Major Component, and (b) serves only to enable use of the work with that Major Component, or to implement a Standard Interface for which an implementation is available to the public in ...
griesemeradded theNeedsFixThe path to resolution is known, but the work has not been done.labelJan 13, 2021 griesemerchanged the titledev.typeparams: type checker does not allow to use receive operation even all types in type list are channelsMar 3, 2021 ...
./interface.go:20:6: cannot use Cat literal (type Cat) as type Duck in assignment: Cat does not implement Duck (Quack method has pointer receiver) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. ...
animalBehavior(cat2,"fish") //编译会报错:Cannot use 'cat2' (type cat) as the type animal Type does not implement 'animal' as the 'run' method has a pointer receiver,因为实现animal接口中方法的是cat类型的指针,而不是cat类型的值