Golang中的静态类型和动态类型使用及说明

	var i interface{}
	var num int = 1
	var str string = "hello world"
	i = num
	i= str

// 空接口结构
type eface struct {
    _type *_type			// 实体类型
    data  unsafe.Pointer	// 数据地址
}

// 包含方法的结构
type iface struct {
    tab  *itab			// 接口和实体类型
    data unsafe.Pointer	// 数据地址
}

type itab struct {
    inter *interfacetype
    _type *_type
    hash  uint32 // copy of _type.hash. Used for type switches.
    _     [4]byte
    fun   [1]uintptr // variable sized. fun[0]==0 means _type does not implement inter.
}

type interfacetype struct {
    typ     _type
    pkgpath name
    mhdr    []imethod
}

type imethod struct {
   name nameOff
   ityp typeOff
}

type _type struct {
    size       uintptr
    ptrdata    uintptr // size of memory prefix holding all pointers
    hash       uint32
    tflag      tflag
    align      uint8
    fieldAlign uint8
    kind       uint8
    // function for comparing objects of this type
    // (ptr to object A, ptr to object B) -> ==?
    equal func(unsafe.Pointer, unsafe.Pointer) bool
    // gcdata stores the GC type data for the garbage collector.
    // If the KindGCProg bit is set in kind, gcdata is a GC program.
    // Otherwise it is a ptrmask bitmap. See mbitmap.go for details.
    gcdata    *byte
    str       nameOff
    ptrToThis typeOff
}

type nameOff int32
type typeOff int32
type tflag uint8