59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
package reflect2
|
|
|
|
import (
|
|
"unsafe"
|
|
"reflect"
|
|
)
|
|
|
|
type eface struct {
|
|
rtype unsafe.Pointer
|
|
data unsafe.Pointer
|
|
}
|
|
|
|
func unpackEFace(obj interface{}) *eface {
|
|
return (*eface)(unsafe.Pointer(&obj))
|
|
}
|
|
|
|
func packEFace(rtype unsafe.Pointer, data unsafe.Pointer) interface{} {
|
|
var i interface{}
|
|
e := (*eface)(unsafe.Pointer(&i))
|
|
e.rtype = rtype
|
|
e.data = data
|
|
return i
|
|
}
|
|
|
|
type UnsafeEFaceType struct {
|
|
unsafeType
|
|
}
|
|
|
|
func newUnsafeEFaceType(cfg *frozenConfig, type1 reflect.Type) *UnsafeEFaceType {
|
|
return &UnsafeEFaceType{
|
|
unsafeType: *newUnsafeType(cfg, type1),
|
|
}
|
|
}
|
|
|
|
func (type2 *UnsafeEFaceType) IsNil(obj interface{}) bool {
|
|
if obj == nil {
|
|
return true
|
|
}
|
|
objEFace := unpackEFace(obj)
|
|
assertType("Type.IsNil argument 1", type2.ptrRType, objEFace.rtype)
|
|
return type2.UnsafeIsNil(objEFace.data)
|
|
}
|
|
|
|
func (type2 *UnsafeEFaceType) UnsafeIsNil(ptr unsafe.Pointer) bool {
|
|
if ptr == nil {
|
|
return true
|
|
}
|
|
return unpackEFace(*(*interface{})(ptr)).data == nil
|
|
}
|
|
|
|
func (type2 *UnsafeEFaceType) Indirect(obj interface{}) interface{} {
|
|
objEFace := unpackEFace(obj)
|
|
assertType("Type.Indirect argument 1", type2.ptrRType, objEFace.rtype)
|
|
return type2.UnsafeIndirect(objEFace.data)
|
|
}
|
|
|
|
func (type2 *UnsafeEFaceType) UnsafeIndirect(ptr unsafe.Pointer) interface{} {
|
|
return *(*interface{})(ptr)
|
|
} |