all: use reflect.{Pointer,PointerTo}

Updates #47651
Updates #48665

Change-Id: I69a87b45a5cad7a07fbd855040cd9935cf874554
Reviewed-on: https://go-review.googlesource.com/c/go/+/358454
Trust: Cuong Manh Le <[email protected]>
Run-TryBot: Cuong Manh Le <[email protected]>
TryBot-Result: Go Bot <[email protected]>
Reviewed-by: Brad Fitzpatrick <[email protected]>

Author: cuonglm

src/cmd/fix/cftype.go

@@ -63,7 +63,7 @@ func typefix(f *ast.File, badType func(string) bool) bool {
 				return
 			}
 			v := reflect.ValueOf(n)
-			if v.Type().Kind() != reflect.Ptr {
+			if v.Type().Kind() != reflect.Pointer {
 				return
 			}
 			if v.IsNil() {

src/cmd/fix/typecheck.go

@@ -383,7 +383,7 @@ func typecheck1(cfg *TypeConfig, f interface{}, typeof map[interface{}]string, a
 		if n == nil {
 			return
 		}
-		if false && reflect.TypeOf(n).Kind() == reflect.Ptr { // debugging trace
+		if false && reflect.TypeOf(n).Kind() == reflect.Pointer { // debugging trace
 			defer func() {
 				if t := typeof[n]; t != "" {
 					pos := fset.Position(n.(ast.Node).Pos())

src/cmd/gofmt/rewrite.go

@@ -292,7 +292,7 @@ func subst(m map[string]reflect.Value, pattern reflect.Value, pos reflect.Value)
 		}
 		return v
 
-	case reflect.Ptr:
+	case reflect.Pointer:
 		v := reflect.New(p.Type()).Elem()
 		if elem := p.Elem(); elem.IsValid() {
 			v.Set(subst(m, elem, pos).Addr())

src/database/sql/convert.go

@@ -386,7 +386,7 @@ func convertAssignRows(dest, src interface{}, rows *Rows) error {
 	}
 
 	dpv := reflect.ValueOf(dest)
-	if dpv.Kind() != reflect.Ptr {
+	if dpv.Kind() != reflect.Pointer {
 		return errors.New("destination not a pointer")
 	}
 	if dpv.IsNil() {
@@ -419,7 +419,7 @@ func convertAssignRows(dest, src interface{}, rows *Rows) error {
 	// This also allows scanning into user defined types such as "type Int int64".
 	// For symmetry, also check for string destination types.
 	switch dv.Kind() {
-	case reflect.Ptr:
+	case reflect.Pointer:
 		if src == nil {
 			dv.Set(reflect.Zero(dv.Type()))
 			return nil
@@ -551,7 +551,7 @@ var valuerReflectType = reflect.TypeOf((*driver.Valuer)(nil)).Elem()
 //
 // This function is mirrored in the database/sql/driver package.
 func callValuerValue(vr driver.Valuer) (v driver.Value, err error) {
-	if rv := reflect.ValueOf(vr); rv.Kind() == reflect.Ptr &&
+	if rv := reflect.ValueOf(vr); rv.Kind() == reflect.Pointer &&
 		rv.IsNil() &&
 		rv.Type().Elem().Implements(valuerReflectType) {
 		return nil, nil

src/database/sql/driver/types.go

@@ -225,7 +225,7 @@ var valuerReflectType = reflect.TypeOf((*Valuer)(nil)).Elem()
 //
 // This function is mirrored in the database/sql package.
 func callValuerValue(vr Valuer) (v Value, err error) {
-	if rv := reflect.ValueOf(vr); rv.Kind() == reflect.Ptr &&
+	if rv := reflect.ValueOf(vr); rv.Kind() == reflect.Pointer &&
 		rv.IsNil() &&
 		rv.Type().Elem().Implements(valuerReflectType) {
 		return nil, nil
@@ -256,7 +256,7 @@ func (defaultConverter) ConvertValue(v interface{}) (Value, error) {
 
 	rv := reflect.ValueOf(v)
 	switch rv.Kind() {
-	case reflect.Ptr:
+	case reflect.Pointer:
 		// indirect pointers
 		if rv.IsNil() {
 			return nil, nil

src/encoding/asn1/asn1.go

@@ -1101,7 +1101,7 @@ func (e *invalidUnmarshalError) Error() string {
 		return "asn1: Unmarshal recipient value is nil"
 	}
 
-	if e.Type.Kind() != reflect.Ptr {
+	if e.Type.Kind() != reflect.Pointer {
 		return "asn1: Unmarshal recipient value is non-pointer " + e.Type.String()
 	}
 	return "asn1: Unmarshal recipient value is nil " + e.Type.String()
@@ -1111,7 +1111,7 @@ func (e *invalidUnmarshalError) Error() string {
 // top-level element. The form of the params is the same as the field tags.
 func UnmarshalWithParams(b []byte, val interface{}, params string) (rest []byte, err error) {
 	v := reflect.ValueOf(val)
-	if v.Kind() != reflect.Ptr || v.IsNil() {
+	if v.Kind() != reflect.Pointer || v.IsNil() {
 		return nil, &invalidUnmarshalError{reflect.TypeOf(val)}
 	}
 	offset, err := parseField(v.Elem(), b, 0, parseFieldParameters(params))

src/encoding/binary/binary.go

@@ -243,7 +243,7 @@ func Read(r io.Reader, order ByteOrder, data interface{}) error {
 	v := reflect.ValueOf(data)
 	size := -1
 	switch v.Kind() {
-	case reflect.Ptr:
+	case reflect.Pointer:
 		v = v.Elem()
 		size = dataSize(v)
 	case reflect.Slice:

src/encoding/gob/decode.go

@@ -228,7 +228,7 @@ func ignoreTwoUints(i *decInstr, state *decoderState, v reflect.Value) {
 // The callers to the individual decoders are expected to have used decAlloc.
 // The individual decoders don't need to it.
 func decAlloc(v reflect.Value) reflect.Value {
-	for v.Kind() == reflect.Ptr {
+	for v.Kind() == reflect.Pointer {
 		if v.IsNil() {
 			v.Set(reflect.New(v.Type().Elem()))
 		}
@@ -464,7 +464,7 @@ func (dec *Decoder) decodeStruct(engine *decEngine, value reflect.Value) {
 		if instr.index != nil {
 			// Otherwise the field is unknown to us and instr.op is an ignore op.
 			field = value.FieldByIndex(instr.index)
-			if field.Kind() == reflect.Ptr {
+			if field.Kind() == reflect.Pointer {
 				field = decAlloc(field)
 			}
 		}
@@ -518,7 +518,7 @@ func (dec *Decoder) decodeArrayHelper(state *decoderState, value reflect.Value,
 		return
 	}
 	instr := &decInstr{elemOp, 0, nil, ovfl}
-	isPtr := value.Type().Elem().Kind() == reflect.Ptr
+	isPtr := value.Type().Elem().Kind() == reflect.Pointer
 	for i := 0; i < length; i++ {
 		if state.b.Len() == 0 {
 			errorf("decoding array or slice: length exceeds input size (%d elements)", length)
@@ -561,8 +561,8 @@ func (dec *Decoder) decodeMap(mtyp reflect.Type, state *decoderState, value refl
 	if value.IsNil() {
 		value.Set(reflect.MakeMapWithSize(mtyp, n))
 	}
-	keyIsPtr := mtyp.Key().Kind() == reflect.Ptr
-	elemIsPtr := mtyp.Elem().Kind() == reflect.Ptr
+	keyIsPtr := mtyp.Key().Kind() == reflect.Pointer
+	elemIsPtr := mtyp.Elem().Kind() == reflect.Pointer
 	keyInstr := &decInstr{keyOp, 0, nil, ovfl}
 	elemInstr := &decInstr{elemOp, 0, nil, ovfl}
 	keyP := reflect.New(mtyp.Key())
@@ -945,7 +945,7 @@ func (dec *Decoder) decIgnoreOpFor(wireId typeId, inProgress map[typeId]*decOp)
 func (dec *Decoder) gobDecodeOpFor(ut *userTypeInfo) *decOp {
 	rcvrType := ut.user
 	if ut.decIndir == -1 {
-		rcvrType = reflect.PtrTo(rcvrType)
+		rcvrType = reflect.PointerTo(rcvrType)
 	} else if ut.decIndir > 0 {
 		for i := int8(0); i < ut.decIndir; i++ {
 			rcvrType = rcvrType.Elem()
@@ -954,7 +954,7 @@ func (dec *Decoder) gobDecodeOpFor(ut *userTypeInfo) *decOp {
 	var op decOp
 	op = func(i *decInstr, state *decoderState, value reflect.Value) {
 		// We now have the base type. We need its address if the receiver is a pointer.
-		if value.Kind() != reflect.Ptr && rcvrType.Kind() == reflect.Ptr {
+		if value.Kind() != reflect.Pointer && rcvrType.Kind() == reflect.Pointer {
 			value = value.Addr()
 		}
 		state.dec.decodeGobDecoder(ut, state, value)

src/encoding/gob/decoder.go

@@ -193,7 +193,7 @@ func (dec *Decoder) Decode(e interface{}) error {
 	value := reflect.ValueOf(e)
 	// If e represents a value as opposed to a pointer, the answer won't
 	// get back to the caller. Make sure it's a pointer.
-	if value.Type().Kind() != reflect.Ptr {
+	if value.Type().Kind() != reflect.Pointer {
 		dec.err = errors.New("gob: attempt to decode into a non-pointer")
 		return dec.err
 	}
@@ -208,7 +208,7 @@ func (dec *Decoder) Decode(e interface{}) error {
 // does not modify v.
 func (dec *Decoder) DecodeValue(v reflect.Value) error {
 	if v.IsValid() {
-		if v.Kind() == reflect.Ptr && !v.IsNil() {
+		if v.Kind() == reflect.Pointer && !v.IsNil() {
 			// That's okay, we'll store through the pointer.
 		} else if !v.CanSet() {
 			return errors.New("gob: DecodeValue of unassignable value")

src/encoding/gob/encode.go

@@ -279,7 +279,7 @@ func valid(v reflect.Value) bool {
 	switch v.Kind() {
 	case reflect.Invalid:
 		return false
-	case reflect.Ptr:
+	case reflect.Pointer:
 		return !v.IsNil()
 	}
 	return true
@@ -386,7 +386,7 @@ func (enc *Encoder) encodeInterface(b *encBuffer, iv reflect.Value) {
 	// Gobs can encode nil interface values but not typed interface
 	// values holding nil pointers, since nil pointers point to no value.
 	elem := iv.Elem()
-	if elem.Kind() == reflect.Ptr && elem.IsNil() {
+	if elem.Kind() == reflect.Pointer && elem.IsNil() {
 		errorf("gob: cannot encode nil pointer of type %s inside interface", iv.Elem().Type())
 	}
 	state := enc.newEncoderState(b)
@@ -446,7 +446,7 @@ func isZero(val reflect.Value) bool {
 		return !val.Bool()
 	case reflect.Complex64, reflect.Complex128:
 		return val.Complex() == 0
-	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Ptr:
+	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Pointer:
 		return val.IsNil()
 	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		return val.Int() == 0
@@ -600,7 +600,7 @@ func encOpFor(rt reflect.Type, inProgress map[reflect.Type]*encOp, building map[
 func gobEncodeOpFor(ut *userTypeInfo) (*encOp, int) {
 	rt := ut.user
 	if ut.encIndir == -1 {
-		rt = reflect.PtrTo(rt)
+		rt = reflect.PointerTo(rt)
 	} else if ut.encIndir > 0 {
 		for i := int8(0); i < ut.encIndir; i++ {
 			rt = rt.Elem()

src/encoding/gob/encoder.go

@@ -219,7 +219,7 @@ func (enc *Encoder) EncodeValue(value reflect.Value) error {
 	if value.Kind() == reflect.Invalid {
 		return errors.New("gob: cannot encode nil value")
 	}
-	if value.Kind() == reflect.Ptr && value.IsNil() {
+	if value.Kind() == reflect.Pointer && value.IsNil() {
 		panic("gob: cannot encode nil pointer of type " + value.Type().String())
 	}
 

src/encoding/gob/type.go

@@ -61,7 +61,7 @@ func validUserType(rt reflect.Type) (*userTypeInfo, error) {
 	slowpoke := ut.base // walks half as fast as ut.base
 	for {
 		pt := ut.base
-		if pt.Kind() != reflect.Ptr {
+		if pt.Kind() != reflect.Pointer {
 			break
 		}
 		ut.base = pt.Elem()
@@ -126,7 +126,7 @@ func implementsInterface(typ, gobEncDecType reflect.Type) (success bool, indir i
 		if rt.Implements(gobEncDecType) {
 			return true, indir
 		}
-		if p := rt; p.Kind() == reflect.Ptr {
+		if p := rt; p.Kind() == reflect.Pointer {
 			indir++
 			if indir > 100 { // insane number of indirections
 				return false, 0
@@ -137,9 +137,9 @@ func implementsInterface(typ, gobEncDecType reflect.Type) (success bool, indir i
 		break
 	}
 	// No luck yet, but if this is a base type (non-pointer), the pointer might satisfy.
-	if typ.Kind() != reflect.Ptr {
+	if typ.Kind() != reflect.Pointer {
 		// Not a pointer, but does the pointer work?
-		if reflect.PtrTo(typ).Implements(gobEncDecType) {
+		if reflect.PointerTo(typ).Implements(gobEncDecType) {
 			return true, -1
 		}
 	}
@@ -569,7 +569,7 @@ func isSent(field *reflect.StructField) bool {
 	// If the field is a chan or func or pointer thereto, don't send it.
 	// That is, treat it like an unexported field.
 	typ := field.Type
-	for typ.Kind() == reflect.Ptr {
+	for typ.Kind() == reflect.Pointer {
 		typ = typ.Elem()
 	}
 	if typ.Kind() == reflect.Chan || typ.Kind() == reflect.Func {
@@ -842,7 +842,7 @@ func Register(value interface{}) {
 	// Dereference one pointer looking for a named type.
 	star := ""
 	if rt.Name() == "" {
-		if pt := rt; pt.Kind() == reflect.Ptr {
+		if pt := rt; pt.Kind() == reflect.Pointer {
 			star = "*"
 			// NOTE: The following line should be rt = pt.Elem() to implement
 			// what the comment above claims, but fixing it would break compatibility

src/encoding/gob/type_test.go

@@ -184,7 +184,7 @@ func TestRegistrationNaming(t *testing.T) {
 			t.Errorf("nameToConcreteType[%q] = %v, want %v", tc.name, ct, tct)
 		}
 		// concreteTypeToName is keyed off the base type.
-		if tct.Kind() == reflect.Ptr {
+		if tct.Kind() == reflect.Pointer {
 			tct = tct.Elem()
 		}
 		if n, _ := concreteTypeToName.Load(tct); n != tc.name {

src/encoding/json/decode.go

@@ -161,15 +161,15 @@ func (e *InvalidUnmarshalError) Error() string {
 		return "json: Unmarshal(nil)"
 	}
 
-	if e.Type.Kind() != reflect.Ptr {
+	if e.Type.Kind() != reflect.Pointer {
 		return "json: Unmarshal(non-pointer " + e.Type.String() + ")"
 	}
 	return "json: Unmarshal(nil " + e.Type.String() + ")"
 }
 
 func (d *decodeState) unmarshal(v interface{}) error {
 	rv := reflect.ValueOf(v)
-	if rv.Kind() != reflect.Ptr || rv.IsNil() {
+	if rv.Kind() != reflect.Pointer || rv.IsNil() {
 		return &InvalidUnmarshalError{reflect.TypeOf(v)}
 	}
 
@@ -440,7 +440,7 @@ func indirect(v reflect.Value, decodingNull bool) (Unmarshaler, encoding.TextUnm
 	// If v is a named type and is addressable,
 	// start with its address, so that if the type has pointer methods,
 	// we find them.
-	if v.Kind() != reflect.Ptr && v.Type().Name() != "" && v.CanAddr() {
+	if v.Kind() != reflect.Pointer && v.Type().Name() != "" && v.CanAddr() {
 		haveAddr = true
 		v = v.Addr()
 	}
@@ -449,14 +449,14 @@ func indirect(v reflect.Value, decodingNull bool) (Unmarshaler, encoding.TextUnm
 		// usefully addressable.
 		if v.Kind() == reflect.Interface && !v.IsNil() {
 			e := v.Elem()
-			if e.Kind() == reflect.Ptr && !e.IsNil() && (!decodingNull || e.Elem().Kind() == reflect.Ptr) {
+			if e.Kind() == reflect.Pointer && !e.IsNil() && (!decodingNull || e.Elem().Kind() == reflect.Pointer) {
 				haveAddr = false
 				v = e
 				continue
 			}
 		}
 
-		if v.Kind() != reflect.Ptr {
+		if v.Kind() != reflect.Pointer {
 			break
 		}
 
@@ -641,7 +641,7 @@ func (d *decodeState) object(v reflect.Value) error {
 			reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
 			reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
 		default:
-			if !reflect.PtrTo(t.Key()).Implements(textUnmarshalerType) {
+			if !reflect.PointerTo(t.Key()).Implements(textUnmarshalerType) {
 				d.saveError(&UnmarshalTypeError{Value: "object", Type: t, Offset: int64(d.off)})
 				d.skip()
 				return nil
@@ -717,7 +717,7 @@ func (d *decodeState) object(v reflect.Value) error {
 				subv = v
 				destring = f.quoted
 				for _, i := range f.index {
-					if subv.Kind() == reflect.Ptr {
+					if subv.Kind() == reflect.Pointer {
 						if subv.IsNil() {
 							// If a struct embeds a pointer to an unexported type,
 							// it is not possible to set a newly allocated value
@@ -782,7 +782,7 @@ func (d *decodeState) object(v reflect.Value) error {
 			kt := t.Key()
 			var kv reflect.Value
 			switch {
-			case reflect.PtrTo(kt).Implements(textUnmarshalerType):
+			case reflect.PointerTo(kt).Implements(textUnmarshalerType):
 				kv = reflect.New(kt)
 				if err := d.literalStore(item, kv, true); err != nil {
 					return err
@@ -907,7 +907,7 @@ func (d *decodeState) literalStore(item []byte, v reflect.Value, fromQuoted bool
 			break
 		}
 		switch v.Kind() {
-		case reflect.Interface, reflect.Ptr, reflect.Map, reflect.Slice:
+		case reflect.Interface, reflect.Pointer, reflect.Map, reflect.Slice:
 			v.Set(reflect.Zero(v.Type()))
 			// otherwise, ignore null for primitives/string
 		}

src/encoding/json/decode_test.go

@@ -1103,7 +1103,7 @@ func TestUnmarshal(t *testing.T) {
 		}
 
 		typ := reflect.TypeOf(tt.ptr)
-		if typ.Kind() != reflect.Ptr {
+		if typ.Kind() != reflect.Pointer {
 			t.Errorf("#%d: unmarshalTest.ptr %T is not a pointer type", i, tt.ptr)
 			continue
 		}