[refactoring] add Parser nodes for use

internal/php5/php5.y

@@ -525,15 +525,17 @@ use_declaration:
             {
                 name := &ast.NameName{ast.Node{}, $1}
                 alias := &ast.Identifier{ast.Node{}, $3.Value}
-                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, alias}
+                asAlias := &ast.ParserAs{ast.Node{}, alias}
+                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, asAlias}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($1)
                 alias.GetNode().Position = position.NewTokenPosition($3)
+                asAlias.GetNode().Position = position.NewTokensPosition($2, $3)
                 $$.GetNode().Position = position.NewNodeListTokenPosition($1, $3)
 
                 // save comments
-                yylex.(*Parser).setFreeFloating(name, token.End, $2.Tokens)
+                yylex.(*Parser).setFreeFloating(asAlias, token.Start, $2.Tokens)
                 yylex.(*Parser).setFreeFloating(alias, token.Start, $3.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
@@ -541,14 +543,16 @@ use_declaration:
     |   T_NS_SEPARATOR namespace_name
             {
                 name := &ast.NameName{ast.Node{}, $2}
-                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, nil}
+                useDeclaration := &ast.StmtUseDeclaration{ast.Node{}, name, nil}
+                $$ = &ast.ParserNsSeparator{ast.Node{}, useDeclaration}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($2)
-                $$.GetNode().Position = position.NewNodeListPosition($2)
+                useDeclaration.GetNode().Position = position.NewTokenNodePosition($1, name)
+                $$.GetNode().Position = position.NewTokenNodePosition($1, name)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens($$, token.Start, $1.Tokens)
+                yylex.(*Parser).setFreeFloating($$, token.Start, $1.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
@@ -556,16 +560,20 @@ use_declaration:
             {
                 name := &ast.NameName{ast.Node{}, $2}
                 alias := &ast.Identifier{ast.Node{}, $4.Value}
-                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, alias}
+                asAlias := &ast.ParserAs{ast.Node{}, alias}
+                useDeclaration := &ast.StmtUseDeclaration{ast.Node{}, name, alias}
+                $$ = &ast.ParserNsSeparator{ast.Node{}, useDeclaration}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($2)
                 alias.GetNode().Position = position.NewTokenPosition($4)
-                $$.GetNode().Position = position.NewNodeListTokenPosition($2, $4)
+                asAlias.GetNode().Position = position.NewTokensPosition($3, $4)
+                useDeclaration.GetNode().Position = position.NewTokensPosition($1, $4)
+                $$.GetNode().Position = position.NewTokensPosition($1, $4)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens($$, token.Start, $1.Tokens)
+                yylex.(*Parser).setFreeFloating($$, token.Start, $1.Tokens)
-                yylex.(*Parser).setFreeFloating(name, token.End, $3.Tokens)
+                yylex.(*Parser).setFreeFloating(asAlias, token.Start, $3.Tokens)
                 yylex.(*Parser).setFreeFloating(alias, token.Start, $4.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
@@ -606,15 +614,17 @@ use_function_declaration:
             {
                 name := &ast.NameName{ast.Node{}, $1}
                 alias := &ast.Identifier{ast.Node{}, $3.Value}
-                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, alias}
+                asAlias := &ast.ParserAs{ast.Node{}, alias}
+                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, asAlias}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($1)
                 alias.GetNode().Position = position.NewTokenPosition($3)
+                asAlias.GetNode().Position = position.NewTokensPosition($2, $3)
                 $$.GetNode().Position = position.NewNodeListTokenPosition($1, $3)
 
                 // save comments
-                yylex.(*Parser).setFreeFloating(name, token.End, $2.Tokens)
+                yylex.(*Parser).setFreeFloating(asAlias, token.Start, $2.Tokens)
                 yylex.(*Parser).setFreeFloating(alias, token.Start, $3.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
@@ -622,14 +632,16 @@ use_function_declaration:
     |   T_NS_SEPARATOR namespace_name
             {
                 name := &ast.NameName{ast.Node{}, $2}
-                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, nil}
+                useDeclaration := &ast.StmtUseDeclaration{ast.Node{}, name, nil}
+                $$ = &ast.ParserNsSeparator{ast.Node{}, useDeclaration}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($2)
-                $$.GetNode().Position = position.NewNodeListPosition($2)
+                useDeclaration.GetNode().Position = position.NewTokenNodePosition($1, name)
+                $$.GetNode().Position = position.NewTokenNodePosition($1, name)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens($$, token.Start, $1.Tokens)
+                yylex.(*Parser).setFreeFloating($$, token.Start, $1.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
@@ -637,16 +649,20 @@ use_function_declaration:
             {
                 name := &ast.NameName{ast.Node{}, $2}
                 alias := &ast.Identifier{ast.Node{}, $4.Value}
-                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, alias}
+                asAlias := &ast.ParserAs{ast.Node{}, alias}
+                useDeclaration := &ast.StmtUseDeclaration{ast.Node{}, name, alias}
+                $$ = &ast.ParserNsSeparator{ast.Node{}, useDeclaration}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($2)
                 alias.GetNode().Position = position.NewTokenPosition($4)
-                $$.GetNode().Position = position.NewNodeListTokenPosition($2, $4)
+                asAlias.GetNode().Position = position.NewTokensPosition($3, $4)
+                useDeclaration.GetNode().Position = position.NewTokensPosition($1, $4)
+                $$.GetNode().Position = position.NewTokensPosition($1, $4)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens($$, token.Start, $1.Tokens)
+                yylex.(*Parser).setFreeFloating($$, token.Start, $1.Tokens)
-                yylex.(*Parser).setFreeFloating(name, token.End, $3.Tokens)
+                yylex.(*Parser).setFreeFloating(asAlias, token.Start, $3.Tokens)
                 yylex.(*Parser).setFreeFloating(alias, token.Start, $4.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
@@ -687,15 +703,17 @@ use_const_declaration:
             {
                 name := &ast.NameName{ast.Node{}, $1}
                 alias := &ast.Identifier{ast.Node{}, $3.Value}
-                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, alias}
+                asAlias := &ast.ParserAs{ast.Node{}, alias}
+                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, asAlias}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($1)
                 alias.GetNode().Position = position.NewTokenPosition($3)
+                asAlias.GetNode().Position = position.NewTokensPosition($2, $3)
                 $$.GetNode().Position = position.NewNodeListTokenPosition($1, $3)
 
                 // save comments
-                yylex.(*Parser).setFreeFloating(name, token.End, $2.Tokens)
+                yylex.(*Parser).setFreeFloating(asAlias, token.Start, $2.Tokens)
                 yylex.(*Parser).setFreeFloating(alias, token.Start, $3.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
@@ -703,14 +721,16 @@ use_const_declaration:
     |   T_NS_SEPARATOR namespace_name
             {
                 name := &ast.NameName{ast.Node{}, $2}
-                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, nil}
+                useDeclaration := &ast.StmtUseDeclaration{ast.Node{}, name, nil}
+                $$ = &ast.ParserNsSeparator{ast.Node{}, useDeclaration}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($2)
-                $$.GetNode().Position = position.NewNodeListPosition($2)
+                useDeclaration.GetNode().Position = position.NewTokenNodePosition($1, name)
+                $$.GetNode().Position = position.NewTokenNodePosition($1, name)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens($$, token.Start, $1.Tokens)
+                yylex.(*Parser).setFreeFloating($$, token.Start, $1.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
@@ -718,16 +738,20 @@ use_const_declaration:
             {
                 name := &ast.NameName{ast.Node{}, $2}
                 alias := &ast.Identifier{ast.Node{}, $4.Value}
-                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, alias}
+                asAlias := &ast.ParserAs{ast.Node{}, alias}
+                useDeclaration := &ast.StmtUseDeclaration{ast.Node{}, name, alias}
+                $$ = &ast.ParserNsSeparator{ast.Node{}, useDeclaration}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($2)
                 alias.GetNode().Position = position.NewTokenPosition($4)
-                $$.GetNode().Position = position.NewNodeListTokenPosition($2, $4)
+                asAlias.GetNode().Position = position.NewTokensPosition($3, $4)
+                useDeclaration.GetNode().Position = position.NewTokensPosition($1, $4)
+                $$.GetNode().Position = position.NewTokensPosition($1, $4)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens($$, token.Start, $1.Tokens)
+                yylex.(*Parser).setFreeFloating($$, token.Start, $1.Tokens)
-                yylex.(*Parser).setFreeFloating(name, token.End, $3.Tokens)
+                yylex.(*Parser).setFreeFloating(asAlias, token.Start, $3.Tokens)
                 yylex.(*Parser).setFreeFloating(alias, token.Start, $4.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)

internal/php5/php5_test.go

@@ -9,6 +9,8 @@ import (
 	"github.com/z7zmey/php-parser/internal/php5"
 	"github.com/z7zmey/php-parser/internal/scanner"
 	"github.com/z7zmey/php-parser/pkg/ast"
+	"github.com/z7zmey/php-parser/pkg/ast/traverser"
+	"github.com/z7zmey/php-parser/pkg/ast/visitor"
 	"github.com/z7zmey/php-parser/pkg/errors"
 	"github.com/z7zmey/php-parser/pkg/position"
 )
@@ -8594,7 +8596,7 @@ func TestPhp5(t *testing.T) {
 						Position: &position.Position{
 							StartLine: 155,
 							EndLine:   155,
-							StartPos:  3295,
+							StartPos:  3294,
 							EndPos:    3298,
 						},
 					},
@@ -8604,7 +8606,7 @@ func TestPhp5(t *testing.T) {
 								Position: &position.Position{
 									StartLine: 155,
 									EndLine:   155,
-									StartPos:  3295,
+									StartPos:  3294,
 									EndPos:    3298,
 								},
 							},
@@ -8649,7 +8651,7 @@ func TestPhp5(t *testing.T) {
 						Position: &position.Position{
 							StartLine: 156,
 							EndLine:   156,
-							StartPos:  3305,
+							StartPos:  3304,
 							EndPos:    3315,
 						},
 					},
@@ -8659,7 +8661,7 @@ func TestPhp5(t *testing.T) {
 								Position: &position.Position{
 									StartLine: 156,
 									EndLine:   156,
-									StartPos:  3305,
+									StartPos:  3304,
 									EndPos:    3315,
 								},
 							},
@@ -8965,7 +8967,7 @@ func TestPhp5(t *testing.T) {
 									Position: &position.Position{
 										StartLine: 159,
 										EndLine:   159,
-										StartPos:  3371,
+										StartPos:  3370,
 										EndPos:    3374,
 									},
 								},
@@ -9085,7 +9087,7 @@ func TestPhp5(t *testing.T) {
 									Position: &position.Position{
 										StartLine: 160,
 										EndLine:   160,
-										StartPos:  3402,
+										StartPos:  3401,
 										EndPos:    3412,
 									},
 								},
@@ -9205,7 +9207,7 @@ func TestPhp5(t *testing.T) {
 									Position: &position.Position{
 										StartLine: 161,
 										EndLine:   161,
-										StartPos:  3430,
+										StartPos:  3429,
 										EndPos:    3433,
 									},
 								},
@@ -9325,7 +9327,7 @@ func TestPhp5(t *testing.T) {
 									Position: &position.Position{
 										StartLine: 162,
 										EndLine:   162,
-										StartPos:  3458,
+										StartPos:  3457,
 										EndPos:    3468,
 									},
 								},
@@ -22214,6 +22216,7 @@ func TestPhp5(t *testing.T) {
 	php5parser := php5.NewParser(lexer, nil)
 	php5parser.Parse()
 	actual := php5parser.GetRootNode()
+	traverser.NewDFS(new(visitor.FilterParserNodes)).Traverse(actual)
 	assert.DeepEqual(t, expected, actual)
 }
 
@@ -22352,6 +22355,7 @@ func TestPhp5Strings(t *testing.T) {
 	php5parser := php5.NewParser(lexer, nil)
 	php5parser.Parse()
 	actual := php5parser.GetRootNode()
+	traverser.NewDFS(new(visitor.FilterParserNodes)).Traverse(actual)
 	assert.DeepEqual(t, expected, actual)
 }
 
@@ -22579,6 +22583,7 @@ CAD;
 	php5parser := php5.NewParser(lexer, nil)
 	php5parser.Parse()
 	actual := php5parser.GetRootNode()
+	traverser.NewDFS(new(visitor.FilterParserNodes)).Traverse(actual)
 	assert.DeepEqual(t, expected, actual)
 }
 

internal/php7/php7.y

@@ -628,42 +628,52 @@ group_use_declaration:
             {
                 name := &ast.NameName{ast.Node{}, $1}
                 useList := &ast.StmtUseList{ast.Node{}, $4}
-                $$ = &ast.StmtGroupUseList{ast.Node{}, name, useList}
+                useListBrackets := &ast.ParserBrackets{ast.Node{}, useList}
+                useListNsSeparator := &ast.ParserNsSeparator{ast.Node{}, useListBrackets}
+                $$ = &ast.StmtGroupUseList{ast.Node{}, name, useListNsSeparator}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($1)
                 useList.GetNode().Position = position.NewNodeListPosition($4)
+                useListBrackets.GetNode().Position = position.NewTokensPosition($3, $6)
+                useListNsSeparator.GetNode().Position = position.NewTokensPosition($2, $6)
                 $$.GetNode().Position = position.NewNodeListTokenPosition($1, $6)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens(useList, token.Start, append($2.Tokens, $3.Tokens...))
                 if $5 != nil {
-                    yylex.(*Parser).setFreeFloatingTokens(useList, token.End, append($5.Tokens, $6.Tokens...))
+                    yylex.(*Parser).setFreeFloatingTokens(useList, token.End, $5.Tokens)
-                } else {
-                    yylex.(*Parser).setFreeFloating(useList, token.End, $6.Tokens)
                 }
+                yylex.(*Parser).setFreeFloatingTokens(useListBrackets, token.Start, $3.Tokens)
+                yylex.(*Parser).setFreeFloatingTokens(useListBrackets, token.End, $6.Tokens)
+                yylex.(*Parser).setFreeFloating(useListNsSeparator, token.Start, $2.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name T_NS_SEPARATOR '{' unprefixed_use_declarations possible_comma '}'
             {
                 name := &ast.NameName{ast.Node{}, $2}
+                prefixNsSeparator := &ast.ParserNsSeparator{ast.Node{}, name}
                 useList := &ast.StmtUseList{ast.Node{}, $5}
-                $$ = &ast.StmtGroupUseList{ast.Node{}, name, useList}
+                useListBrackets := &ast.ParserBrackets{ast.Node{}, useList}
+                useListNsSeparator := &ast.ParserNsSeparator{ast.Node{}, useListBrackets}
+                $$ = &ast.StmtGroupUseList{ast.Node{}, prefixNsSeparator, useListNsSeparator}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($2)
+                prefixNsSeparator.GetNode().Position = position.NewTokenNodePosition($1, name)
                 useList.GetNode().Position = position.NewNodeListPosition($5)
+                useListBrackets.GetNode().Position = position.NewTokensPosition($4, $7)
+                useListNsSeparator.GetNode().Position = position.NewTokensPosition($3, $7)
                 $$.GetNode().Position = position.NewTokensPosition($1, $7)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens(useList, token.Start, append($3.Tokens, $4.Tokens...))
+                yylex.(*Parser).setFreeFloating(prefixNsSeparator, token.Start, $1.Tokens)
                 if $6 != nil {
-                    yylex.(*Parser).setFreeFloatingTokens(useList, token.End, append($6.Tokens, $7.Tokens...))
+                    yylex.(*Parser).setFreeFloatingTokens(useList, token.End, $6.Tokens)
-                } else {
-                    yylex.(*Parser).setFreeFloating(useList, token.End, $7.Tokens)
                 }
-                yylex.(*Parser).setFreeFloatingTokens($$, token.Start, $1.Tokens)
+                yylex.(*Parser).setFreeFloatingTokens(useListBrackets, token.Start, $4.Tokens)
+                yylex.(*Parser).setFreeFloatingTokens(useListBrackets, token.End, $7.Tokens)
+                yylex.(*Parser).setFreeFloating(useListNsSeparator, token.Start, $3.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
@@ -674,42 +684,52 @@ mixed_group_use_declaration:
             {
                 name := &ast.NameName{ast.Node{}, $1}
                 useList := &ast.StmtUseList{ast.Node{}, $4}
-                $$ = &ast.StmtGroupUseList{ast.Node{}, name, useList}
+                useListBrackets := &ast.ParserBrackets{ast.Node{}, useList}
+                useListNsSeparator := &ast.ParserNsSeparator{ast.Node{}, useListBrackets}
+                $$ = &ast.StmtGroupUseList{ast.Node{}, name, useListNsSeparator}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($1)
                 useList.GetNode().Position = position.NewNodeListPosition($4)
+                useListBrackets.GetNode().Position = position.NewTokensPosition($3, $6)
+                useListNsSeparator.GetNode().Position = position.NewTokensPosition($2, $6)
                 $$.GetNode().Position = position.NewNodeListTokenPosition($1, $6)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens(useList, token.Start, append($2.Tokens, $3.Tokens...))
                 if $5 != nil {
-                    yylex.(*Parser).setFreeFloatingTokens(useList, token.End, append($5.Tokens, $6.Tokens...))
+                    yylex.(*Parser).setFreeFloatingTokens(useList, token.End, $5.Tokens)
-                } else {
-                    yylex.(*Parser).setFreeFloatingTokens(useList, token.End, $6.Tokens)
                 }
+                yylex.(*Parser).setFreeFloatingTokens(useListBrackets, token.Start, $3.Tokens)
+                yylex.(*Parser).setFreeFloatingTokens(useListBrackets, token.End, $6.Tokens)
+                yylex.(*Parser).setFreeFloating(useListNsSeparator, token.Start, $2.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
     |   T_NS_SEPARATOR namespace_name T_NS_SEPARATOR '{' inline_use_declarations possible_comma '}'
             {
                 name := &ast.NameName{ast.Node{}, $2}
+                prefixNsSeparator := &ast.ParserNsSeparator{ast.Node{}, name}
                 useList := &ast.StmtUseList{ast.Node{}, $5}
-                $$ = &ast.StmtGroupUseList{ast.Node{}, name, useList}
+                useListBrackets := &ast.ParserBrackets{ast.Node{}, useList}
+                useListNsSeparator := &ast.ParserNsSeparator{ast.Node{}, useListBrackets}
+                $$ = &ast.StmtGroupUseList{ast.Node{}, prefixNsSeparator, useListNsSeparator}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($2)
+                prefixNsSeparator.GetNode().Position = position.NewTokenNodePosition($1, name)
                 useList.GetNode().Position = position.NewNodeListPosition($5)
+                useListBrackets.GetNode().Position = position.NewTokensPosition($4, $7)
+                useListNsSeparator.GetNode().Position = position.NewTokensPosition($3, $7)
                 $$.GetNode().Position = position.NewTokensPosition($1, $7)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens(useList, token.Start, append($3.Tokens, $4.Tokens...))
+                yylex.(*Parser).setFreeFloating(prefixNsSeparator, token.Start, $1.Tokens)
                 if $6 != nil {
-                    yylex.(*Parser).setFreeFloatingTokens(useList, token.End, append($6.Tokens, $7.Tokens...))
+                    yylex.(*Parser).setFreeFloatingTokens(useList, token.End, $6.Tokens)
-                } else {
-                    yylex.(*Parser).setFreeFloating(useList, token.End, $7.Tokens)
                 }
-                yylex.(*Parser).setFreeFloatingTokens($$, token.Start, $1.Tokens)
+                yylex.(*Parser).setFreeFloatingTokens(useListBrackets, token.Start, $4.Tokens)
+                yylex.(*Parser).setFreeFloatingTokens(useListBrackets, token.End, $7.Tokens)
+                yylex.(*Parser).setFreeFloating(useListNsSeparator, token.Start, $3.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }
@@ -814,15 +834,17 @@ unprefixed_use_declaration:
             {
                 name := &ast.NameName{ast.Node{}, $1}
                 alias := &ast.Identifier{ast.Node{}, $3.Value}
-                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, alias}
+                asAlias := &ast.ParserAs{ast.Node{}, alias}
+                $$ = &ast.StmtUseDeclaration{ast.Node{}, name, asAlias}
 
                 // save position
                 name.GetNode().Position = position.NewNodeListPosition($1)
                 alias.GetNode().Position = position.NewTokenPosition($3)
+                asAlias.GetNode().Position = position.NewTokensPosition($2, $3)
                 $$.GetNode().Position = position.NewNodeListTokenPosition($1, $3)
 
                 // save comments
-                yylex.(*Parser).setFreeFloating(name, token.End, $2.Tokens)
+                yylex.(*Parser).setFreeFloating(asAlias, token.Start, $2.Tokens)
                 yylex.(*Parser).setFreeFloating(alias, token.Start, $3.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
@@ -838,10 +860,14 @@ use_declaration:
             }
     |   T_NS_SEPARATOR unprefixed_use_declaration
             {
-                $$ = $2;
+                $$ = &ast.ParserNsSeparator{ast.Node{}, $2}
+
+                // save position
+                $2.GetNode().Position = position.NewTokenNodePosition($1, $2)
+                $$.GetNode().Position = position.NewTokenNodePosition($1, $2)
 
                 // save comments
-                yylex.(*Parser).setFreeFloatingTokens($$, token.Start, $1.Tokens)
+                yylex.(*Parser).setFreeFloating($$, token.Start, $1.Tokens)
 
                 yylex.(*Parser).returnTokenToPool(yyDollar, &yyVAL)
             }

internal/php7/php7_test.go

@@ -9,6 +9,8 @@ import (
 	"github.com/z7zmey/php-parser/internal/php7"
 	"github.com/z7zmey/php-parser/internal/scanner"
 	"github.com/z7zmey/php-parser/pkg/ast"
+	"github.com/z7zmey/php-parser/pkg/ast/traverser"
+	"github.com/z7zmey/php-parser/pkg/ast/visitor"
 	"github.com/z7zmey/php-parser/pkg/errors"
 	"github.com/z7zmey/php-parser/pkg/position"
 )
@@ -9082,7 +9084,7 @@ func TestPhp7(t *testing.T) {
 						Position: &position.Position{
 							StartLine: 162,
 							EndLine:   162,
-							StartPos:  3376,
+							StartPos:  3375,
 							EndPos:    3379,
 						},
 					},
@@ -9092,7 +9094,7 @@ func TestPhp7(t *testing.T) {
 								Position: &position.Position{
 									StartLine: 162,
 									EndLine:   162,
-									StartPos:  3376,
+									StartPos:  3375,
 									EndPos:    3379,
 								},
 							},
@@ -9137,7 +9139,7 @@ func TestPhp7(t *testing.T) {
 						Position: &position.Position{
 							StartLine: 163,
 							EndLine:   163,
-							StartPos:  3386,
+							StartPos:  3385,
 							EndPos:    3396,
 						},
 					},
@@ -9147,7 +9149,7 @@ func TestPhp7(t *testing.T) {
 								Position: &position.Position{
 									StartLine: 163,
 									EndLine:   163,
-									StartPos:  3386,
+									StartPos:  3385,
 									EndPos:    3396,
 								},
 							},
@@ -9453,7 +9455,7 @@ func TestPhp7(t *testing.T) {
 									Position: &position.Position{
 										StartLine: 166,
 										EndLine:   166,
-										StartPos:  3452,
+										StartPos:  3451,
 										EndPos:    3455,
 									},
 								},
@@ -9573,7 +9575,7 @@ func TestPhp7(t *testing.T) {
 									Position: &position.Position{
 										StartLine: 167,
 										EndLine:   167,
-										StartPos:  3483,
+										StartPos:  3482,
 										EndPos:    3493,
 									},
 								},
@@ -9693,7 +9695,7 @@ func TestPhp7(t *testing.T) {
 									Position: &position.Position{
 										StartLine: 168,
 										EndLine:   168,
-										StartPos:  3511,
+										StartPos:  3510,
 										EndPos:    3514,
 									},
 								},
@@ -9813,7 +9815,7 @@ func TestPhp7(t *testing.T) {
 									Position: &position.Position{
 										StartLine: 169,
 										EndLine:   169,
-										StartPos:  3539,
+										StartPos:  3538,
 										EndPos:    3549,
 									},
 								},
@@ -19597,6 +19599,7 @@ func TestPhp7(t *testing.T) {
 	php7parser := php7.NewParser(lexer, nil)
 	php7parser.Parse()
 	actual := php7parser.GetRootNode()
+	traverser.NewDFS(new(visitor.FilterParserNodes)).Traverse(actual)
 	assert.DeepEqual(t, expected, actual)
 }
 
@@ -19735,6 +19738,7 @@ func TestPhp5Strings(t *testing.T) {
 	php7parser := php7.NewParser(lexer, nil)
 	php7parser.Parse()
 	actual := php7parser.GetRootNode()
+	traverser.NewDFS(new(visitor.FilterParserNodes)).Traverse(actual)
 	assert.DeepEqual(t, expected, actual)
 }
 
@@ -19962,6 +19966,7 @@ CAD;
 	php7parser := php7.NewParser(lexer, nil)
 	php7parser.Parse()
 	actual := php7parser.GetRootNode()
+	traverser.NewDFS(new(visitor.FilterParserNodes)).Traverse(actual)
 	assert.DeepEqual(t, expected, actual)
 }
 

pkg/ast/ast.go

@@ -198,4 +198,8 @@ type NodeVisitor interface {
 	NameFullyQualified(n *NameFullyQualified)
 	NameRelative(n *NameRelative)
 	NameNamePart(n *NameNamePart)
+
+	ParserAs(n *ParserAs)
+	ParserNsSeparator(n *ParserNsSeparator)
+	ParserBrackets(n *ParserBrackets)
 }

pkg/ast/node.go

@@ -1876,3 +1876,30 @@ type NameNamePart struct {
 func (n *NameNamePart) Accept(v NodeVisitor) {
 	v.NameNamePart(n)
 }
+
+type ParserAs struct {
+	Node
+	Child Vertex
+}
+
+func (n *ParserAs) Accept(v NodeVisitor) {
+	v.ParserAs(n)
+}
+
+type ParserNsSeparator struct {
+	Node
+	Child Vertex
+}
+
+func (n *ParserNsSeparator) Accept(v NodeVisitor) {
+	v.ParserNsSeparator(n)
+}
+
+type ParserBrackets struct {
+	Node
+	Child Vertex
+}
+
+func (n *ParserBrackets) Accept(v NodeVisitor) {
+	v.ParserBrackets(n)
+}

pkg/ast/traverser/dfs.go

@@ -2783,6 +2783,42 @@ func (t *DFS) Traverse(n ast.Vertex) {
 		if !t.visitor.EnterNode(nn) {
 			return
 		}
+	case *ast.ParserAs:
+		if nn == nil {
+			return
+		}
+		if !t.visitor.EnterNode(nn) {
+			return
+		}
+		if nn.Child != nil {
+			t.visitor.Enter("Child", true)
+			t.Traverse(nn.Child)
+			t.visitor.Leave("Child", true)
+		}
+	case *ast.ParserNsSeparator:
+		if nn == nil {
+			return
+		}
+		if !t.visitor.EnterNode(nn) {
+			return
+		}
+		if nn.Child != nil {
+			t.visitor.Enter("Child", true)
+			t.Traverse(nn.Child)
+			t.visitor.Leave("Child", true)
+		}
+	case *ast.ParserBrackets:
+		if nn == nil {
+			return
+		}
+		if !t.visitor.EnterNode(nn) {
+			return
+		}
+		if nn.Child != nil {
+			t.visitor.Enter("Child", true)
+			t.Traverse(nn.Child)
+			t.visitor.Leave("Child", true)
+		}
 	default:
 		panic("unexpected type of node")
 	}

pkg/ast/visitor/dump.go

@@ -1288,3 +1288,21 @@ func (v *Dump) NameNamePart(n *ast.NameNamePart) {
 	v.printIndent(v.indent)
 	v.print(fmt.Sprintf("Value: []byte(%q),\n", n.Value))
 }
+
+func (v *Dump) ParserAs(n *ast.ParserAs) {
+	v.printIndentIfNotSingle(v.indent - 1)
+	v.print("&ast.ParserAs{\n")
+	v.printNode(n.GetNode())
+}
+
+func (v *Dump) ParserNsSeparator(n *ast.ParserNsSeparator) {
+	v.printIndentIfNotSingle(v.indent - 1)
+	v.print("&ast.ParserNsSeparator{\n")
+	v.printNode(n.GetNode())
+}
+
+func (v *Dump) ParserBrackets(n *ast.ParserBrackets) {
+	v.printIndentIfNotSingle(v.indent - 1)
+	v.print("&ast.ParserBrackets{\n")
+	v.printNode(n.GetNode())
+}

pkg/ast/visitor/filter_parser_nodes.go

@@ -0,0 +1,42 @@
+package visitor
+
+import (
+	"github.com/z7zmey/php-parser/pkg/ast"
+)
+
+type FilterParserNodes struct {
+	Null
+}
+
+func (v *FilterParserNodes) EnterNode(n ast.Vertex) bool {
+	n.Accept(v)
+	return true
+}
+
+func (v *FilterParserNodes) StmtGroupUseList(n *ast.StmtGroupUseList) {
+	if nn, ok := n.Prefix.(*ast.ParserNsSeparator); ok {
+		n.Prefix = nn.Child
+	}
+
+	if nn, ok := n.UseList.(*ast.ParserNsSeparator); ok {
+		n.UseList = nn.Child
+	}
+
+	if nn, ok := n.UseList.(*ast.ParserBrackets); ok {
+		n.UseList = nn.Child
+	}
+}
+
+func (v *FilterParserNodes) StmtUseList(n *ast.StmtUseList) {
+	for k, v := range n.UseDeclarations {
+		if nn, ok := v.(*ast.ParserNsSeparator); ok {
+			n.UseDeclarations[k] = nn.Child
+		}
+	}
+}
+
+func (v *FilterParserNodes) StmtUseDeclaration(n *ast.StmtUseDeclaration) {
+	if nn, ok := n.Alias.(*ast.ParserAs); ok {
+		n.Alias = nn.Child
+	}
+}

pkg/ast/visitor/null.go

@@ -713,3 +713,15 @@ func (v *Null) NameRelative(_ *ast.NameRelative) {
 func (v *Null) NameNamePart(_ *ast.NameNamePart) {
 	// do nothing
 }
+
+func (v *Null) ParserAs(_ *ast.ParserAs) {
+	// do nothing
+}
+
+func (v *Null) ParserNsSeparator(_ *ast.ParserNsSeparator) {
+	// do nothing
+}
+
+func (v *Null) ParserBrackets(_ *ast.ParserBrackets) {
+	// do nothing
+}

pkg/printer/printer.go

@@ -19,7 +19,6 @@ type Printer struct {
 	w        io.Writer
 	s        printerState
 	bufStart string
-	bufEnd   string
 }
 
 // NewPrinter - Constructor for Printer
@@ -449,6 +448,12 @@ func (p *Printer) printNode(n ast.Vertex) {
 		p.printStmtUseType(n)
 	case *ast.StmtWhile:
 		p.printStmtWhile(n)
+	case *ast.ParserAs:
+		p.printParserAs(n)
+	case *ast.ParserNsSeparator:
+		p.printParserNsSeparator(n)
+	case *ast.ParserBrackets:
+		p.printParserBrackets(n)
 	}
 }
 
@@ -556,8 +561,7 @@ func (p *Printer) printNameName(n ast.Vertex) {
 
 	p.joinPrint("\\", nn.Parts)
 
-	p.printFreeFloatingOrDefault(nn, token.End, p.bufEnd)
+	p.printFreeFloating(nn, token.End)
-	p.bufEnd = ""
 }
 
 func (p *Printer) printNameFullyQualified(n ast.Vertex) {
@@ -568,8 +572,7 @@ func (p *Printer) printNameFullyQualified(n ast.Vertex) {
 	io.WriteString(p.w, "\\")
 	p.joinPrint("\\", nn.Parts)
 
-	p.printFreeFloatingOrDefault(nn, token.End, p.bufEnd)
+	p.printFreeFloating(nn, token.End)
-	p.bufEnd = ""
 }
 
 func (p *Printer) printNameRelative(n ast.Vertex) {
@@ -585,8 +588,7 @@ func (p *Printer) printNameRelative(n ast.Vertex) {
 		p.Print(part)
 	}
 
-	p.printFreeFloatingOrDefault(nn, token.End, p.bufEnd)
+	p.printFreeFloating(nn, token.End)
-	p.bufEnd = ""
 }
 
 // scalar
@@ -3203,43 +3205,38 @@ func (p *Printer) printStmtGroupUseList(n ast.Vertex) {
 
 	p.Print(nn.Prefix)
 
-	p.bufStart = "\\{"
+	if _, ok := nn.UseList.(*ast.ParserNsSeparator); !ok {
-	p.bufEnd = "}"
+		io.WriteString(p.w, "\\{")
+	}
+
 	p.Print(nn.UseList)
 
+	if _, ok := nn.UseList.(*ast.ParserNsSeparator); !ok {
+		io.WriteString(p.w, "}")
+	}
+
 	p.printFreeFloating(nn, token.End)
 }
 
 func (p *Printer) printStmtUseList(n ast.Vertex) {
 	nn := n.(*ast.StmtUseList)
-
-	bufEnd := p.bufEnd
-	p.bufEnd = ""
-
-	if p.bufStart == "\\{" {
-		p.printFreeFloatingOrDefault(nn, token.Start, p.bufStart)
-		p.bufStart = ""
-	} else {
 	p.printFreeFloating(nn, token.Start)
-	}
 
 	p.joinPrint(",", nn.UseDeclarations)
 
-	p.printFreeFloatingOrDefault(nn, token.End, bufEnd)
+	p.printFreeFloating(nn, token.End)
 }
 
 func (p *Printer) printStmtUseDeclaration(n ast.Vertex) {
 	nn := n.(*ast.StmtUseDeclaration)
 	p.printFreeFloating(nn, token.Start)
 
-	if nn.Alias != nil {
-		p.bufEnd = " "
-	}
-
 	p.Print(nn.Use)
 
 	if nn.Alias != nil {
-		io.WriteString(p.w, "as")
+		if _, ok := nn.Alias.(*ast.ParserAs); !ok {
+			io.WriteString(p.w, " as")
+		}
 
 		p.bufStart = " "
 		p.Print(nn.Alias)
@@ -3275,3 +3272,32 @@ func (p *Printer) printStmtWhile(n ast.Vertex) {
 
 	p.printFreeFloating(nn, token.End)
 }
+
+func (p *Printer) printParserAs(n ast.Vertex) {
+	nn := n.(*ast.ParserAs)
+	p.printFreeFloating(nn, token.Start)
+
+	io.WriteString(p.w, "as")
+	p.Print(nn.Child)
+
+	p.printFreeFloating(nn, token.End)
+}
+
+func (p *Printer) printParserNsSeparator(n ast.Vertex) {
+	nn := n.(*ast.ParserNsSeparator)
+	p.printFreeFloating(nn, token.Start)
+
+	io.WriteString(p.w, "\\")
+	p.Print(nn.Child)
+
+	p.printFreeFloating(nn, token.End)
+}
+
+func (p *Printer) printParserBrackets(n ast.Vertex) {
+	nn := n.(*ast.ParserBrackets)
+	p.printFreeFloating(nn, token.Start)
+
+	p.Print(nn.Child)
+
+	p.printFreeFloating(nn, token.End)
+}