update input/outpu

input/value/any.go

@@ -3,7 +3,7 @@ package value
 import "gitoa.ru/go-4devs/console/input/flag"
 
 type Any struct {
-	Empty
+	empty
 	Val  []interface{}
 	Flag flag.Flag
 }

input/value/bool.go

@@ -7,7 +7,7 @@ import (
 )
 
 type Bool struct {
-	Empty
+	empty
 	Val  []bool
 	Flag flag.Flag
 }

input/value/duration.go

@@ -7,7 +7,7 @@ import (
 )
 
 type Duration struct {
-	Empty
+	empty
 	Val  []time.Duration
 	Flag flag.Flag
 }

input/value/empty.go

@@ -4,84 +4,90 @@ import (
 	"time"
 )
 
-type Empty struct{}
+var Empty = &empty{}
 
-func (e *Empty) Append(string) error {
+func IsEmpty(v Value) bool {
+	return v == Empty
+}
+
+type empty struct{}
+
+func (e *empty) Append(string) error {
 	return ErrAppendEmpty
 }
 
-func (e *Empty) String() string {
+func (e *empty) String() string {
 	return ""
 }
 
-func (e *Empty) Int() int {
+func (e *empty) Int() int {
 	return 0
 }
 
-func (e *Empty) Int64() int64 {
+func (e *empty) Int64() int64 {
 	return 0
 }
 
-func (e *Empty) Uint() uint {
+func (e *empty) Uint() uint {
 	return 0
 }
 
-func (e *Empty) Uint64() uint64 {
+func (e *empty) Uint64() uint64 {
 	return 0
 }
 
-func (e *Empty) Float64() float64 {
+func (e *empty) Float64() float64 {
 	return 0
 }
 
-func (e *Empty) Bool() bool {
+func (e *empty) Bool() bool {
 	return false
 }
 
-func (e *Empty) Duration() time.Duration {
+func (e *empty) Duration() time.Duration {
 	return 0
 }
 
-func (e *Empty) Time() time.Time {
+func (e *empty) Time() time.Time {
 	return time.Time{}
 }
 
-func (e *Empty) Strings() []string {
+func (e *empty) Strings() []string {
 	return nil
 }
 
-func (e *Empty) Ints() []int {
+func (e *empty) Ints() []int {
 	return nil
 }
 
-func (e *Empty) Int64s() []int64 {
+func (e *empty) Int64s() []int64 {
 	return nil
 }
 
-func (e *Empty) Uints() []uint {
+func (e *empty) Uints() []uint {
 	return nil
 }
 
-func (e *Empty) Uint64s() []uint64 {
+func (e *empty) Uint64s() []uint64 {
 	return nil
 }
 
-func (e *Empty) Float64s() []float64 {
+func (e *empty) Float64s() []float64 {
 	return nil
 }
 
-func (e *Empty) Bools() []bool {
+func (e *empty) Bools() []bool {
 	return nil
 }
 
-func (e *Empty) Durations() []time.Duration {
+func (e *empty) Durations() []time.Duration {
 	return nil
 }
 
-func (e *Empty) Times() []time.Time {
+func (e *empty) Times() []time.Time {
 	return nil
 }
 
-func (e *Empty) Any() interface{} {
+func (e *empty) Any() interface{} {
 	return nil
 }

input/value/float64.go

@@ -7,7 +7,7 @@ import (
 )
 
 type Float64 struct {
-	Empty
+	empty
 	Val  []float64
 	Flag flag.Flag
 }

input/value/int.go

@@ -7,7 +7,7 @@ import (
 )
 
 type Int struct {
-	Empty
+	empty
 	Val  []int
 	Flag flag.Flag
 }

input/value/int64.go

@@ -7,7 +7,7 @@ import (
 )
 
 type Int64 struct {
-	Empty
+	empty
 	Val  []int64
 	Flag flag.Flag
 }

input/value/read.go

@@ -4,7 +4,7 @@ import (
 	"errors"
 )
 
-var _ AppendValue = (*Read)(nil)
+var _ Append = (*Read)(nil)
 
 var (
 	ErrAppendRead  = errors.New("invalid append data to read value")

input/value/string.go

@@ -3,7 +3,7 @@ package value
 import "gitoa.ru/go-4devs/console/input/flag"
 
 type String struct {
-	Empty
+	empty
 	Val  []string
 	Flag flag.Flag
 }

input/value/time.go

@@ -7,7 +7,7 @@ import (
 )
 
 type Time struct {
-	Empty
+	empty
 	Val  []time.Time
 	Flag flag.Flag
 }

input/value/uint.go

@@ -7,7 +7,7 @@ import (
 )
 
 type Uint struct {
-	Empty
+	empty
 	Val  []uint
 	Flag flag.Flag
 }

input/value/uint64.go

@@ -7,7 +7,7 @@ import (
 )
 
 type Uint64 struct {
-	Empty
+	empty
 	Val  []uint64
 	Flag flag.Flag
 }

input/value/value.go

@@ -29,13 +29,13 @@ type Value interface {
 	Times() []time.Time
 }
 
-type AppendValue interface {
+type Append interface {
 	Value
 	Append(string) error
 }
 
 //nolint: gocyclo
-func New(v interface{}) Value {
+func New(v interface{}) Append {
 	switch val := v.(type) {
 	case string:
 		return &String{Val: []string{val}, Flag: flag.String}
@@ -75,18 +75,20 @@ func New(v interface{}) Value {
 		return &Int{Val: val, Flag: flag.Int | flag.Array}
 	case []interface{}:
 		return &Any{Val: val, Flag: flag.Any | flag.Array}
-	case Value:
+	case Append:
 		return val
+	case Value:
+		return &Read{Value: val}
 	default:
 		if v != nil {
 			return &Any{Val: []interface{}{v}, Flag: flag.Any}
 		}
 
-		return &Empty{}
+		return &empty{}
 	}
 }
 
-func ByFlag(f flag.Flag) AppendValue {
+func ByFlag(f flag.Flag) Append {
 	switch {
 	case f.IsInt():
 		return &Int{Flag: f | flag.Int}