feed-to-muc/vendor/github.com/modern-go/reflect2/unsafe_field.go

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2020-10-24 12:37:32 +02:00
package reflect2
import (
"reflect"
"unsafe"
)
type UnsafeStructField struct {
reflect.StructField
structType *UnsafeStructType
rtype unsafe.Pointer
ptrRType unsafe.Pointer
}
func newUnsafeStructField(structType *UnsafeStructType, structField reflect.StructField) *UnsafeStructField {
return &UnsafeStructField{
StructField: structField,
rtype: unpackEFace(structField.Type).data,
ptrRType: unpackEFace(reflect.PtrTo(structField.Type)).data,
structType: structType,
}
}
func (field *UnsafeStructField) Offset() uintptr {
return field.StructField.Offset
}
func (field *UnsafeStructField) Name() string {
return field.StructField.Name
}
func (field *UnsafeStructField) PkgPath() string {
return field.StructField.PkgPath
}
func (field *UnsafeStructField) Type() Type {
return field.structType.cfg.Type2(field.StructField.Type)
}
func (field *UnsafeStructField) Tag() reflect.StructTag {
return field.StructField.Tag
}
func (field *UnsafeStructField) Index() []int {
return field.StructField.Index
}
func (field *UnsafeStructField) Anonymous() bool {
return field.StructField.Anonymous
}
func (field *UnsafeStructField) Set(obj interface{}, value interface{}) {
objEFace := unpackEFace(obj)
assertType("StructField.SetIndex argument 1", field.structType.ptrRType, objEFace.rtype)
valueEFace := unpackEFace(value)
assertType("StructField.SetIndex argument 2", field.ptrRType, valueEFace.rtype)
field.UnsafeSet(objEFace.data, valueEFace.data)
}
func (field *UnsafeStructField) UnsafeSet(obj unsafe.Pointer, value unsafe.Pointer) {
fieldPtr := add(obj, field.StructField.Offset, "same as non-reflect &v.field")
typedmemmove(field.rtype, fieldPtr, value)
}
func (field *UnsafeStructField) Get(obj interface{}) interface{} {
objEFace := unpackEFace(obj)
assertType("StructField.GetIndex argument 1", field.structType.ptrRType, objEFace.rtype)
value := field.UnsafeGet(objEFace.data)
return packEFace(field.ptrRType, value)
}
func (field *UnsafeStructField) UnsafeGet(obj unsafe.Pointer) unsafe.Pointer {
return add(obj, field.StructField.Offset, "same as non-reflect &v.field")
}