node constructors return concrete type

node/scalar/dnumber.go

@@ -11,7 +11,7 @@ type Dnumber struct {
 	Value    string
 }
 
-func NewDnumber(Value string) node.Node {
+func NewDnumber(Value string) *Dnumber {
 	return &Dnumber{
 		nil,
 		nil,

node/scalar/encapsed.go

@@ -11,7 +11,7 @@ type Encapsed struct {
 	Parts    []node.Node
 }
 
-func NewEncapsed(Parts []node.Node) node.Node {
+func NewEncapsed(Parts []node.Node) *Encapsed {
 	return &Encapsed{
 		nil,
 		nil,

node/scalar/encapsed_string_part.go

@@ -11,7 +11,7 @@ type EncapsedStringPart struct {
 	Value    string
 }
 
-func NewEncapsedStringPart(Value string) node.Node {
+func NewEncapsedStringPart(Value string) *EncapsedStringPart {
 	return &EncapsedStringPart{
 		nil,
 		nil,

node/scalar/lnumber.go

@@ -11,7 +11,7 @@ type Lnumber struct {
 	Value    string
 }
 
-func NewLnumber(Value string) node.Node {
+func NewLnumber(Value string) *Lnumber {
 	return &Lnumber{
 		nil,
 		nil,

node/scalar/magic_constant.go

@@ -11,7 +11,7 @@ type MagicConstant struct {
 	Value    string
 }
 
-func NewMagicConstant(Value string) node.Node {
+func NewMagicConstant(Value string) *MagicConstant {
 	return &MagicConstant{
 		nil,
 		nil,

node/scalar/string.go

@@ -11,7 +11,7 @@ type String struct {
 	Value    string
 }
 
-func NewString(Value string) node.Node {
+func NewString(Value string) *String {
 	return &String{
 		nil,
 		nil,