remove unused attributes fields

node/expr/binary_op/binary_op.go

@@ -5,8 +5,7 @@ import (
 )
 
 type BinaryOp struct {
-	attributes map[string]interface{}
-	position   *node.Position
-	Left       node.Node
-	Right      node.Node
+	position *node.Position
+	Left     node.Node
+	Right    node.Node
 }

node/expr/binary_op/bitwise_and.go

@@ -11,7 +11,6 @@ type BitwiseAnd struct {
 func NewBitwiseAnd(Variable node.Node, Expression node.Node) node.Node {
 	return &BitwiseAnd{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewBitwiseAnd(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n BitwiseAnd) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n BitwiseAnd) Position() *node.Position {

node/expr/binary_op/bitwise_or.go

@@ -11,7 +11,6 @@ type BitwiseOr struct {
 func NewBitwiseOr(Variable node.Node, Expression node.Node) node.Node {
 	return &BitwiseOr{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewBitwiseOr(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n BitwiseOr) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n BitwiseOr) Position() *node.Position {

node/expr/binary_op/bitwise_xor.go

@@ -11,7 +11,6 @@ type BitwiseXor struct {
 func NewBitwiseXor(Variable node.Node, Expression node.Node) node.Node {
 	return &BitwiseXor{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewBitwiseXor(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n BitwiseXor) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n BitwiseXor) Position() *node.Position {

node/expr/binary_op/boolean_and.go

@@ -11,7 +11,6 @@ type BooleanAnd struct {
 func NewBooleanAnd(Variable node.Node, Expression node.Node) node.Node {
 	return &BooleanAnd{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewBooleanAnd(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n BooleanAnd) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n BooleanAnd) Position() *node.Position {

node/expr/binary_op/boolean_or.go

@@ -11,7 +11,6 @@ type BooleanOr struct {
 func NewBooleanOr(Variable node.Node, Expression node.Node) node.Node {
 	return &BooleanOr{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewBooleanOr(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n BooleanOr) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n BooleanOr) Position() *node.Position {

node/expr/binary_op/coalesce.go

@@ -11,7 +11,6 @@ type Coalesce struct {
 func NewCoalesce(Variable node.Node, Expression node.Node) node.Node {
 	return &Coalesce{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewCoalesce(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Coalesce) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Coalesce) Position() *node.Position {

node/expr/binary_op/concat.go

@@ -11,7 +11,6 @@ type Concat struct {
 func NewConcat(Variable node.Node, Expression node.Node) node.Node {
 	return &Concat{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewConcat(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Concat) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Concat) Position() *node.Position {

node/expr/binary_op/div.go

@@ -11,7 +11,6 @@ type Div struct {
 func NewDiv(Variable node.Node, Expression node.Node) node.Node {
 	return &Div{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewDiv(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Div) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Div) Position() *node.Position {

node/expr/binary_op/equal.go

@@ -11,7 +11,6 @@ type Equal struct {
 func NewEqual(Variable node.Node, Expression node.Node) node.Node {
 	return &Equal{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewEqual(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Equal) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Equal) Position() *node.Position {

node/expr/binary_op/greater.go

@@ -11,7 +11,6 @@ type Greater struct {
 func NewGreater(Variable node.Node, Expression node.Node) node.Node {
 	return &Greater{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewGreater(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Greater) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Greater) Position() *node.Position {

node/expr/binary_op/greater_or_equal.go

@@ -11,7 +11,6 @@ type GreaterOrEqual struct {
 func NewGreaterOrEqual(Variable node.Node, Expression node.Node) node.Node {
 	return &GreaterOrEqual{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewGreaterOrEqual(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n GreaterOrEqual) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n GreaterOrEqual) Position() *node.Position {

node/expr/binary_op/identical.go

@@ -11,7 +11,6 @@ type Identical struct {
 func NewIdentical(Variable node.Node, Expression node.Node) node.Node {
 	return &Identical{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewIdentical(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Identical) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Identical) Position() *node.Position {

node/expr/binary_op/logical_and.go

@@ -11,7 +11,6 @@ type LogicalAnd struct {
 func NewLogicalAnd(Variable node.Node, Expression node.Node) node.Node {
 	return &LogicalAnd{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewLogicalAnd(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n LogicalAnd) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n LogicalAnd) Position() *node.Position {

node/expr/binary_op/logical_or.go

@@ -11,7 +11,6 @@ type LogicalOr struct {
 func NewLogicalOr(Variable node.Node, Expression node.Node) node.Node {
 	return &LogicalOr{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewLogicalOr(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n LogicalOr) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n LogicalOr) Position() *node.Position {

node/expr/binary_op/logical_xor.go

@@ -11,7 +11,6 @@ type LogicalXor struct {
 func NewLogicalXor(Variable node.Node, Expression node.Node) node.Node {
 	return &LogicalXor{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewLogicalXor(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n LogicalXor) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n LogicalXor) Position() *node.Position {

node/expr/binary_op/minus.go

@@ -11,7 +11,6 @@ type Minus struct {
 func NewMinus(Variable node.Node, Expression node.Node) node.Node {
 	return &Minus{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewMinus(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Minus) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Minus) Position() *node.Position {

node/expr/binary_op/mod.go

@@ -11,7 +11,6 @@ type Mod struct {
 func NewMod(Variable node.Node, Expression node.Node) node.Node {
 	return &Mod{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewMod(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Mod) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Mod) Position() *node.Position {

node/expr/binary_op/mul.go

@@ -11,7 +11,6 @@ type Mul struct {
 func NewMul(Variable node.Node, Expression node.Node) node.Node {
 	return &Mul{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewMul(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Mul) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Mul) Position() *node.Position {

node/expr/binary_op/not_equal.go

@@ -11,7 +11,6 @@ type NotEqual struct {
 func NewNotEqual(Variable node.Node, Expression node.Node) node.Node {
 	return &NotEqual{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewNotEqual(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n NotEqual) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n NotEqual) Position() *node.Position {

node/expr/binary_op/not_identical.go

@@ -11,7 +11,6 @@ type NotIdentical struct {
 func NewNotIdentical(Variable node.Node, Expression node.Node) node.Node {
 	return &NotIdentical{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewNotIdentical(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n NotIdentical) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n NotIdentical) Position() *node.Position {

node/expr/binary_op/plus.go

@@ -11,7 +11,6 @@ type Plus struct {
 func NewPlus(Variable node.Node, Expression node.Node) node.Node {
 	return &Plus{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewPlus(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Plus) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Plus) Position() *node.Position {

node/expr/binary_op/pow.go

@@ -11,7 +11,6 @@ type Pow struct {
 func NewPow(Variable node.Node, Expression node.Node) node.Node {
 	return &Pow{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewPow(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Pow) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Pow) Position() *node.Position {

node/expr/binary_op/shift_left.go

@@ -11,7 +11,6 @@ type ShiftLeft struct {
 func NewShiftLeft(Variable node.Node, Expression node.Node) node.Node {
 	return &ShiftLeft{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewShiftLeft(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n ShiftLeft) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n ShiftLeft) Position() *node.Position {

node/expr/binary_op/shift_right.go

@@ -11,7 +11,6 @@ type ShiftRight struct {
 func NewShiftRight(Variable node.Node, Expression node.Node) node.Node {
 	return &ShiftRight{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewShiftRight(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n ShiftRight) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n ShiftRight) Position() *node.Position {

node/expr/binary_op/smaller.go

@@ -11,7 +11,6 @@ type Smaller struct {
 func NewSmaller(Variable node.Node, Expression node.Node) node.Node {
 	return &Smaller{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewSmaller(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Smaller) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Smaller) Position() *node.Position {

node/expr/binary_op/smaller_or_equal.go

@@ -11,7 +11,6 @@ type SmallerOrEqual struct {
 func NewSmallerOrEqual(Variable node.Node, Expression node.Node) node.Node {
 	return &SmallerOrEqual{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewSmallerOrEqual(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n SmallerOrEqual) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n SmallerOrEqual) Position() *node.Position {

node/expr/binary_op/spaceship.go

@@ -11,7 +11,6 @@ type Spaceship struct {
 func NewSpaceship(Variable node.Node, Expression node.Node) node.Node {
 	return &Spaceship{
 		BinaryOp{
-			map[string]interface{}{},
 			nil,
 			Variable,
 			Expression,
@@ -20,7 +19,7 @@ func NewSpaceship(Variable node.Node, Expression node.Node) node.Node {
 }
 
 func (n Spaceship) Attributes() map[string]interface{} {
-	return n.attributes
+	return nil
 }
 
 func (n Spaceship) Position() *node.Position {