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This article introduces the knowledge of "what are the structures in interface". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Eface

The eface structure represents the interface {} type that does not contain any methods and contains two pointers to the underlying data and type.

/ / go1.13.9 runtime/runtime2.go 197

Type eface struct {_ type * _ type data unsafe.Pointer} iface

The iface structure represents the interface that contains the method

/ / go1.13.9 runtime/runtime2.go 192

Type iface struct {tab * itab data unsafe.Pointer} itab

/ / go1.13.9 runtime/runtime2.go 730

Type itab struct {inter * interfacetype _ type * _ type link * itab hash uint32 / / copy of _ type.hash. Used for type switches. Bad bool / / type does not implement interface inhash bool / / has this itab been added to hash? Unused [2] byte fun [1] uintptr / / variable sized} interfacetype

/ / go1.13.9 runtime/type.go 354

Type interfacetype struct {typ _ type / / Type pkgpath name / / package path mhdr [] imethod / / function list defined by the interface} _ type

The memory space occupied by the size type, which provides information for the allocation of memory space

The hash field can help us quickly determine whether the type is equal.

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