#51 saving optional tokes and tokens that have different representation as meta

main.go

@@ -18,6 +18,7 @@ import (
 	"github.com/z7zmey/php-parser/parser"
 	"github.com/z7zmey/php-parser/php5"
 	"github.com/z7zmey/php-parser/php7"
+	"github.com/z7zmey/php-parser/printer"
 	"github.com/z7zmey/php-parser/visitor"
 )
 
@@ -27,6 +28,7 @@ var dumpType string
 var profiler string
 var withMeta *bool
 var showResolvedNs *bool
+var printBack *bool
 
 type file struct {
 	path    string
@@ -37,6 +39,7 @@ func main() {
 	usePhp5 = flag.Bool("php5", false, "parse as PHP5")
 	withMeta = flag.Bool("meta", false, "show meta")
 	showResolvedNs = flag.Bool("r", false, "resolve names")
+	printBack = flag.Bool("pb", false, "print AST back into the parsed file")
 	flag.StringVar(&dumpType, "d", "", "dump format: [custom, go, json, pretty_json]")
 	flag.StringVar(&profiler, "prof", "", "start profiler: [cpu, mem, trace]")
 
@@ -62,7 +65,7 @@ func main() {
 	}
 
 	// run printer goroutine
-	go printer(resultCh)
+	go printerWorker(resultCh)
 
 	// process files
 	processPath(flag.Args(), fileCh)
@@ -133,7 +136,7 @@ func parserWorker(fileCh <-chan *file, result chan<- parser.Parser) {
 	}
 }
 
-func printer(result <-chan parser.Parser) {
+func printerWorker(result <-chan parser.Parser) {
 	var counter int
 
 	w := bufio.NewWriter(os.Stdout)
@@ -153,6 +156,15 @@ func printer(result <-chan parser.Parser) {
 			fmt.Fprintln(w, e)
 		}
 
+		if *printBack {
+			o := bytes.NewBuffer([]byte{})
+			p := printer.NewPrinter(o)
+			p.Print(parserWorker.GetRootNode())
+
+			err := ioutil.WriteFile(parserWorker.GetPath(), o.Bytes(), 0644)
+			checkErr(err)
+		}
+
 		var nsResolver *visitor.NamespaceResolver
 		if *showResolvedNs {
 			nsResolver = visitor.NewNamespaceResolver()

meta/collection.go

@@ -0,0 +1,115 @@
+package meta
+
+// Collection of Meta objects
+type Collection []*Data
+
+// SetTokenName sets TokenName for the all elements in the collection
+func (mc *Collection) SetTokenName(tn TokenName) *Collection {
+	for _, m := range *mc {
+		m.TokenName = tn
+	}
+
+	return mc
+}
+
+// Push adds elements to the end of an Collection
+func (mc *Collection) Push(mm ...*Data) *Collection {
+	*mc = append(*mc, mm...)
+	return mc
+}
+
+// Unshift prepends elements to the beginning of an Collection
+func (mc *Collection) Unshift(mm ...*Data) *Collection {
+	*mc = append(mm, *mc...)
+	return mc
+}
+
+// AppendTo - appends elements of the collection to the end of the target collection
+func (mc *Collection) AppendTo(target *Collection) *Collection {
+	if len(*mc) == 0 {
+		return mc
+	}
+	*target = append(*target, *mc...)
+	return mc
+}
+
+// PrependTo - prepends elements of the collection to the start of the target collection
+func (mc *Collection) PrependTo(target *Collection) *Collection {
+	if len(*mc) == 0 {
+		return mc
+	}
+	*target = append(*mc, *target...)
+	return mc
+}
+
+// Cut elements by TokenName
+func (mc *Collection) Cut(f Filter) *Collection {
+	collection := (*mc)[:0]
+	cutted := Collection{}
+
+	for _, m := range *mc {
+		if fr := f(m); fr {
+			cutted = append(cutted, m)
+		} else {
+			collection = append(collection, m)
+		}
+	}
+
+	*mc = collection
+
+	return &cutted
+}
+
+// Filter function signature
+type Filter func(d *Data) bool
+
+// TokenNameFilter generates filter function that returns true
+// if data.TokenName exactly same as given
+func TokenNameFilter(tn TokenName) Filter {
+	return func(d *Data) bool {
+		return d.TokenName == tn
+	}
+}
+
+// TypeFilter generates filter function that returns true
+// if data.Type exactly same as given
+func TypeFilter(t Type) Filter {
+	return func(d *Data) bool {
+		return d.Type == t
+	}
+}
+
+// AndFilter generates filter function that returns true
+// if all given filters return true
+func AndFilter(filters ...Filter) Filter {
+	return func(d *Data) bool {
+		for _, filter := range filters {
+			if result := filter(d); !result {
+				return false
+			}
+		}
+
+		return true
+	}
+}
+
+// OrFilter generates filter function that returns true
+// if one of given filters return true
+func OrFilter(filters ...Filter) Filter {
+	return func(d *Data) bool {
+		for _, filter := range filters {
+			if result := filter(d); result {
+				return true
+			}
+		}
+
+		return false
+	}
+}
+
+// NotFilter negates given filter
+func NotFilter(f Filter) Filter {
+	return func(d *Data) bool {
+		return !f(d)
+	}
+}

meta/collection_test.go

@@ -0,0 +1,422 @@
+package meta_test
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/kylelemons/godebug/pretty"
+	"github.com/z7zmey/php-parser/meta"
+)
+
+func TestCollectionSetTokenName(t *testing.T) {
+
+	// prepare
+
+	whiteSpace := &meta.Data{
+		Type:  meta.WhiteSpaceType,
+		Value: "\n",
+	}
+	comment := &meta.Data{
+		Type:  meta.CommentType,
+		Value: "// some comment",
+	}
+
+	baseCollection := meta.Collection{whiteSpace, comment}
+
+	// action
+
+	baseCollection.SetTokenName(meta.OpenParenthesisToken)
+
+	// check
+
+	for _, m := range baseCollection {
+		if m.TokenName != meta.OpenParenthesisToken {
+			t.Error("The TokenName must be set for all Meta objects")
+		}
+	}
+}
+
+func TestCollectionPush(t *testing.T) {
+
+	// prepare
+
+	whiteSpace := &meta.Data{
+		Type:  meta.WhiteSpaceType,
+		Value: "\n",
+	}
+	comment := &meta.Data{
+		Type:  meta.CommentType,
+		Value: "// some comment",
+	}
+
+	actualCollection := meta.Collection{whiteSpace}
+	expectedCollection := meta.Collection{whiteSpace, comment}
+
+	// action
+
+	actualCollection.Push(comment)
+
+	// check
+
+	if !reflect.DeepEqual(expectedCollection, actualCollection) {
+		diff := pretty.Compare(expectedCollection, actualCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual collections are not equal\n")
+		}
+	}
+}
+
+func TestCollectionUnshift(t *testing.T) {
+
+	// prepare
+
+	whiteSpace := &meta.Data{
+		Type:  meta.WhiteSpaceType,
+		Value: "\n",
+	}
+	comment := &meta.Data{
+		Type:  meta.CommentType,
+		Value: "// some comment",
+	}
+
+	actualCollection := meta.Collection{comment}
+	expectedCollection := meta.Collection{whiteSpace, comment}
+
+	// action
+
+	actualCollection.Unshift(whiteSpace)
+
+	// check
+
+	if !reflect.DeepEqual(expectedCollection, actualCollection) {
+		diff := pretty.Compare(expectedCollection, actualCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual collections are not equal\n")
+		}
+	}
+}
+
+func TestCollectionAppendTo(t *testing.T) {
+
+	// prepare
+
+	whiteSpace := &meta.Data{
+		Type:  meta.WhiteSpaceType,
+		Value: "\n",
+	}
+	comment := &meta.Data{
+		Type:  meta.CommentType,
+		Value: "// some comment",
+	}
+
+	actualCollection := meta.Collection{whiteSpace}
+	expectedCollection := meta.Collection{whiteSpace, comment}
+
+	baseCollection := meta.Collection{comment}
+
+	// action
+
+	baseCollection.AppendTo(&actualCollection)
+
+	// check
+
+	if !reflect.DeepEqual(expectedCollection, actualCollection) {
+		diff := pretty.Compare(expectedCollection, actualCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual collections are not equal\n")
+		}
+	}
+}
+
+func TestEmptyCollectionAppendTo(t *testing.T) {
+
+	// prepare
+
+	whiteSpace := &meta.Data{
+		Type:  meta.WhiteSpaceType,
+		Value: "\n",
+	}
+
+	actualCollection := meta.Collection{whiteSpace}
+	expectedCollection := meta.Collection{whiteSpace}
+
+	var baseCollection meta.Collection = nil
+
+	// action
+
+	baseCollection.AppendTo(&actualCollection)
+
+	// check
+
+	if !reflect.DeepEqual(expectedCollection, actualCollection) {
+		diff := pretty.Compare(expectedCollection, actualCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual collections are not equal\n")
+		}
+	}
+}
+
+func TestCollectionPrependTo(t *testing.T) {
+
+	// prepare
+
+	whiteSpace := &meta.Data{
+		Type:  meta.WhiteSpaceType,
+		Value: "\n",
+	}
+	comment := &meta.Data{
+		Type:  meta.CommentType,
+		Value: "// some comment",
+	}
+
+	actualCollection := meta.Collection{comment}
+	expectedCollection := meta.Collection{whiteSpace, comment}
+
+	baseCollection := meta.Collection{whiteSpace}
+
+	// action
+
+	baseCollection.PrependTo(&actualCollection)
+
+	// check
+
+	if !reflect.DeepEqual(expectedCollection, actualCollection) {
+		diff := pretty.Compare(expectedCollection, actualCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual collections are not equal\n")
+		}
+	}
+}
+
+func TestEmptyCollectionPrependTo(t *testing.T) {
+
+	// prepare
+
+	comment := &meta.Data{
+		Type:  meta.CommentType,
+		Value: "// some comment",
+	}
+
+	actualCollection := meta.Collection{comment}
+	expectedCollection := meta.Collection{comment}
+
+	baseCollection := meta.Collection{}
+
+	// action
+
+	baseCollection.PrependTo(&actualCollection)
+
+	// check
+
+	if !reflect.DeepEqual(expectedCollection, actualCollection) {
+		diff := pretty.Compare(expectedCollection, actualCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual collections are not equal\n")
+		}
+	}
+}
+
+func TestCollectionCutByTokenName(t *testing.T) {
+
+	// prepare
+
+	whiteSpace := &meta.Data{
+		Type:  meta.WhiteSpaceType,
+		Value: "\n",
+	}
+	OpenParenthesisComment := &meta.Data{
+		Type:      meta.CommentType,
+		Value:     "// some comment",
+		TokenName: meta.OpenParenthesisToken,
+	}
+	OpenParenthesisToken := &meta.Data{
+		Type:      meta.TokenType,
+		Value:     "(",
+		TokenName: meta.OpenParenthesisToken,
+	}
+	CloseParenthesisToken := &meta.Data{
+		Type:      meta.TokenType,
+		Value:     ")",
+		TokenName: meta.CloseParenthesisToken,
+	}
+
+	actualCollection := meta.Collection{whiteSpace, OpenParenthesisComment, OpenParenthesisToken, CloseParenthesisToken}
+
+	expectedCollection := meta.Collection{whiteSpace, CloseParenthesisToken}
+	expectedCuttedCollection := &meta.Collection{OpenParenthesisComment, OpenParenthesisToken}
+
+	// action
+
+	actualCuttedCollection := actualCollection.Cut(
+		meta.TokenNameFilter(meta.OpenParenthesisToken),
+	)
+
+	// check
+
+	if !reflect.DeepEqual(expectedCollection, actualCollection) {
+		diff := pretty.Compare(expectedCollection, actualCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual collections are not equal\n")
+		}
+	}
+
+	if !reflect.DeepEqual(expectedCuttedCollection, actualCuttedCollection) {
+		diff := pretty.Compare(expectedCuttedCollection, actualCuttedCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual cutted collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual cutted collections are not equal\n")
+		}
+	}
+}
+
+func TestCollectionCutByTokenTypes(t *testing.T) {
+
+	// prepare
+
+	whiteSpace := &meta.Data{
+		Type:  meta.WhiteSpaceType,
+		Value: "\n",
+	}
+	OpenParenthesisComment := &meta.Data{
+		Type:      meta.CommentType,
+		Value:     "// some comment",
+		TokenName: meta.OpenParenthesisToken,
+	}
+	OpenParenthesisToken := &meta.Data{
+		Type:      meta.TokenType,
+		Value:     "(",
+		TokenName: meta.OpenParenthesisToken,
+	}
+	CloseParenthesisToken := &meta.Data{
+		Type:      meta.TokenType,
+		Value:     ")",
+		TokenName: meta.CloseParenthesisToken,
+	}
+
+	actualCollection := meta.Collection{whiteSpace, OpenParenthesisComment, OpenParenthesisToken, CloseParenthesisToken}
+
+	expectedCollection := meta.Collection{OpenParenthesisToken, CloseParenthesisToken}
+	expectedCuttedCollection := &meta.Collection{whiteSpace, OpenParenthesisComment}
+
+	// action
+
+	actualCuttedCollection := actualCollection.Cut(meta.OrFilter(
+		meta.TypeFilter(meta.CommentType),
+		meta.TypeFilter(meta.WhiteSpaceType)),
+	)
+
+	// check
+
+	if !reflect.DeepEqual(expectedCollection, actualCollection) {
+		diff := pretty.Compare(expectedCollection, actualCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual collections are not equal\n")
+		}
+	}
+
+	if !reflect.DeepEqual(expectedCuttedCollection, actualCuttedCollection) {
+		diff := pretty.Compare(expectedCuttedCollection, actualCuttedCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual cutted collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual cutted collections are not equal\n")
+		}
+	}
+}
+
+func TestCollectionCutByTokenNameButNotType(t *testing.T) {
+
+	// prepare
+
+	whiteSpace := &meta.Data{
+		Type:  meta.WhiteSpaceType,
+		Value: "\n",
+	}
+	OpenParenthesisComment := &meta.Data{
+		Type:      meta.CommentType,
+		Value:     "// some comment",
+		TokenName: meta.OpenParenthesisToken,
+	}
+	OpenParenthesisToken := &meta.Data{
+		Type:      meta.TokenType,
+		Value:     "(",
+		TokenName: meta.OpenParenthesisToken,
+	}
+	CloseParenthesisToken := &meta.Data{
+		Type:      meta.TokenType,
+		Value:     ")",
+		TokenName: meta.CloseParenthesisToken,
+	}
+
+	actualCollection := meta.Collection{
+		whiteSpace,
+		OpenParenthesisComment,
+		OpenParenthesisToken,
+		CloseParenthesisToken,
+	}
+
+	expectedCollection := meta.Collection{
+		whiteSpace,
+		OpenParenthesisToken,
+		CloseParenthesisToken,
+	}
+	expectedCuttedCollection := &meta.Collection{
+		OpenParenthesisComment,
+	}
+
+	// action
+
+	actualCuttedCollection := actualCollection.Cut(meta.AndFilter(
+		meta.TokenNameFilter(meta.OpenParenthesisToken),
+		meta.NotFilter(meta.TypeFilter(meta.TokenType))),
+	)
+
+	// check
+
+	if !reflect.DeepEqual(expectedCollection, actualCollection) {
+		diff := pretty.Compare(expectedCollection, actualCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual collections are not equal\n")
+		}
+	}
+
+	if !reflect.DeepEqual(expectedCuttedCollection, actualCuttedCollection) {
+		diff := pretty.Compare(expectedCuttedCollection, actualCuttedCollection)
+
+		if diff != "" {
+			t.Errorf("\nexpected and actual cutted collections are not equal\ndiff: (-expected +actual)\n%s", diff)
+		} else {
+			t.Errorf("\nexpected and actual cutted collections are not equal\n")
+		}
+	}
+}

meta/comment.go

@@ -1,39 +0,0 @@
-package meta
-
-import (
-	"github.com/z7zmey/php-parser/position"
-)
-
-// Comment aggrigates information about comment /**
-type Comment struct {
-	Value     string
-	Position  *position.Position
-	TokenName TokenName
-}
-
-// NewComment - Comment constructor
-func NewComment(value string, pos *position.Position) *Comment {
-	return &Comment{
-		Value:     value,
-		Position:  pos,
-		TokenName: UnknownToken,
-	}
-}
-
-// SetTokenName sets token name
-func (c *Comment) SetTokenName(tokenName TokenName) {
-	c.TokenName = tokenName
-}
-
-// GetTokenName returns token name
-func (c *Comment) GetTokenName() TokenName {
-	return c.TokenName
-}
-
-func (c *Comment) String() string {
-	return c.Value
-}
-
-func (c *Comment) GetPosition() *position.Position {
-	return c.Position
-}

meta/comment_test.go

@@ -1,44 +0,0 @@
-package meta_test
-
-import (
-	"testing"
-
-	"github.com/z7zmey/php-parser/position"
-
-	"github.com/z7zmey/php-parser/meta"
-)
-
-func TestCommentPrint(t *testing.T) {
-	expected := "/** hello world */"
-
-	comment := meta.NewComment(expected, nil)
-
-	actual := comment.String()
-
-	if expected != actual {
-		t.Errorf("expected and actual are not equal\n")
-	}
-}
-
-func TestCommentSetGetTokenName(t *testing.T) {
-	expected := meta.ArrayToken
-	c := meta.NewComment("/** hello world */", nil)
-	c.SetTokenName(expected)
-
-	actual := c.GetTokenName()
-
-	if expected != actual {
-		t.Errorf("expected and actual are not equal\n")
-	}
-}
-
-func TestCommentGetPosition(t *testing.T) {
-	expected := position.NewPosition(1, 1, 1, 1)
-	c := meta.NewComment("/** hello world */", expected)
-
-	actual := c.GetPosition()
-
-	if expected != actual {
-		t.Errorf("expected and actual are not equal\n")
-	}
-}

meta/data.go

@@ -0,0 +1,17 @@
+package meta
+
+import (
+	"github.com/z7zmey/php-parser/position"
+)
+
+// Data contain additional information that isn't part of AST
+type Data struct {
+	Value     string
+	Type      Type
+	Position  *position.Position
+	TokenName TokenName
+}
+
+func (d *Data) String() string {
+	return d.Value
+}

meta/data_test.go

@@ -0,0 +1,21 @@
+package meta_test
+
+import (
+	"testing"
+
+	"github.com/z7zmey/php-parser/meta"
+)
+
+func TestCommentPrint(t *testing.T) {
+	expected := "/** hello world */"
+
+	comment := meta.Data{
+		Value: expected,
+	}
+
+	actual := comment.String()
+
+	if expected != actual {
+		t.Errorf("expected and actual are not equal\n")
+	}
+}

meta/meta.go

@@ -1,12 +0,0 @@
-package meta
-
-import (
-	"github.com/z7zmey/php-parser/position"
-)
-
-type Meta interface {
-	String() string
-	SetTokenName(tn TokenName)
-	GetTokenName() TokenName
-	GetPosition() *position.Position
-}

meta/tokenName.go

@@ -36,7 +36,6 @@ const (
 	EnddeclareToken
 	AsToken
 	SwitchToken
-	SwitchSemicolonToken
 	EndswitchToken
 	CaseToken
 	DefaultToken
@@ -68,9 +67,11 @@ const (
 	CallableToken
 	StartHeredocToken
 	DollarOpenCurlyBracesToken
+	DollarCloseCurlyBracesToken
 	CurlyOpenToken
 	PaamayimNekudotayimToken
 	NamespaceToken
+	UseLeadingNsSeparatorToken
 	NsSeparatorToken
 	EllipsisToken
 	EvalToken
@@ -80,7 +81,7 @@ const (
 	LogicalXorToken
 	LogicalAndToken
 	InstanceofToken
-	NewToken
+	NewAnchor
 	CloneToken
 	ElseifToken
 	ElseToken

meta/tokenName_string.go

@@ -4,9 +4,9 @@ package meta
 
 import "strconv"
 
-const _TokenName_name = "UnknownTokenNodeStartNodeEndMagicConstantTokenIncludeTokenIncludeOnceTokenExitTokenIfTokenLnumberTokenDnumberTokenStringTokenStringVarnameTokenVariableTokenNumStringTokenInlineHTMLTokenEncapsedAndWhitespaceTokenConstantEncapsedStringTokenEchoTokenDoTokenWhileTokenEndwhileTokenForInitSemicolonTokenForCondSemicolonTokenForTokenEndforTokenForeachTokenEndforeachTokenDeclareTokenEnddeclareTokenAsTokenSwitchTokenSwitchSemicolonTokenEndswitchTokenCaseTokenDefaultTokenBreakTokenContinueTokenGotoTokenFunctionTokenConstTokenReturnTokenTryTokenCatchTokenFinallyTokenThrowTokenUseTokenInsteadofTokenGlobalTokenVarTokenUnsetTokenIssetTokenEmptyTokenClassTokenTraitTokenInterfaceTokenExtendsTokenImplementsTokenDoubleArrowTokenListTokenArrayTokenCallableTokenStartHeredocTokenDollarOpenCurlyBracesTokenCurlyOpenTokenPaamayimNekudotayimTokenNamespaceTokenNsSeparatorTokenEllipsisTokenEvalTokenRequireTokenRequireOnceTokenLogicalOrTokenLogicalXorTokenLogicalAndTokenInstanceofTokenNewTokenCloneTokenElseifTokenElseTokenEndifTokenPrintTokenYieldTokenStaticTokenAbstractTokenFinalTokenPrivateTokenProtectedTokenPublicTokenIncTokenDecTokenYieldFromTokenObjectOperatorTokenIntCastTokenDoubleCastTokenStringCastTokenArrayCastTokenObjectCastTokenBoolCastTokenUnsetCastTokenCoalesceTokenSpaceshipTokenPlusEqualTokenMinusEqualTokenMulEqualTokenPowEqualTokenDivEqualTokenConcatEqualTokenModEqualTokenAndEqualTokenOrEqualTokenXorEqualTokenSlEqualTokenSrEqualTokenBooleanOrTokenBooleanAndTokenPowTokenSlTokenSrTokenIsIdenticalTokenIsNotIdenticalTokenIsEqualTokenIsNotEqualTokenIsSmallerOrEqualTokenIsGreaterOrEqualTokenHaltCompilerTokenIdentifierTokenCaseSeparatorTokenDoubleQuoteTokenBackquoteTokenOpenCurlyBracesTokenCloseCurlyBracesTokenSemiColonTokenColonTokenOpenParenthesisTokenCloseParenthesisTokenOpenSquareBracketCloseSquareBracketQuestionMarkTokenAmpersandTokenMinusTokenPlusTokenExclamationMarkTokenTildeTokenAtTokenDollarTokenCommaTokenVerticalBarTokenEqualTokenCaretTokenAsteriskTokenSlashTokenPercentTokenLessTokenGreaterTokenDotToken"
+const _TokenName_name = "UnknownTokenNodeStartNodeEndMagicConstantTokenIncludeTokenIncludeOnceTokenExitTokenIfTokenLnumberTokenDnumberTokenStringTokenStringVarnameTokenVariableTokenNumStringTokenInlineHTMLTokenEncapsedAndWhitespaceTokenConstantEncapsedStringTokenEchoTokenDoTokenWhileTokenEndwhileTokenForInitSemicolonTokenForCondSemicolonTokenForTokenEndforTokenForeachTokenEndforeachTokenDeclareTokenEnddeclareTokenAsTokenSwitchTokenEndswitchTokenCaseTokenDefaultTokenBreakTokenContinueTokenGotoTokenFunctionTokenConstTokenReturnTokenTryTokenCatchTokenFinallyTokenThrowTokenUseTokenInsteadofTokenGlobalTokenVarTokenUnsetTokenIssetTokenEmptyTokenClassTokenTraitTokenInterfaceTokenExtendsTokenImplementsTokenDoubleArrowTokenListTokenArrayTokenCallableTokenStartHeredocTokenDollarOpenCurlyBracesTokenDollarCloseCurlyBracesTokenCurlyOpenTokenPaamayimNekudotayimTokenNamespaceTokenUseLeadingNsSeparatorTokenNsSeparatorTokenEllipsisTokenEvalTokenRequireTokenRequireOnceTokenLogicalOrTokenLogicalXorTokenLogicalAndTokenInstanceofTokenNewAnchorCloneTokenElseifTokenElseTokenEndifTokenPrintTokenYieldTokenStaticTokenAbstractTokenFinalTokenPrivateTokenProtectedTokenPublicTokenIncTokenDecTokenYieldFromTokenObjectOperatorTokenIntCastTokenDoubleCastTokenStringCastTokenArrayCastTokenObjectCastTokenBoolCastTokenUnsetCastTokenCoalesceTokenSpaceshipTokenPlusEqualTokenMinusEqualTokenMulEqualTokenPowEqualTokenDivEqualTokenConcatEqualTokenModEqualTokenAndEqualTokenOrEqualTokenXorEqualTokenSlEqualTokenSrEqualTokenBooleanOrTokenBooleanAndTokenPowTokenSlTokenSrTokenIsIdenticalTokenIsNotIdenticalTokenIsEqualTokenIsNotEqualTokenIsSmallerOrEqualTokenIsGreaterOrEqualTokenHaltCompilerTokenIdentifierTokenCaseSeparatorTokenDoubleQuoteTokenBackquoteTokenOpenCurlyBracesTokenCloseCurlyBracesTokenSemiColonTokenColonTokenOpenParenthesisTokenCloseParenthesisTokenOpenSquareBracketCloseSquareBracketQuestionMarkTokenAmpersandTokenMinusTokenPlusTokenExclamationMarkTokenTildeTokenAtTokenDollarTokenCommaTokenVerticalBarTokenEqualTokenCaretTokenAsteriskTokenSlashTokenPercentTokenLessTokenGreaterTokenDotToken"
 
-var _TokenName_index = [...]uint16{0, 12, 21, 28, 46, 58, 74, 83, 90, 102, 114, 125, 143, 156, 170, 185, 211, 238, 247, 254, 264, 277, 298, 319, 327, 338, 350, 365, 377, 392, 399, 410, 430, 444, 453, 465, 475, 488, 497, 510, 520, 531, 539, 549, 561, 571, 579, 593, 604, 612, 622, 632, 642, 652, 662, 676, 688, 703, 719, 728, 738, 751, 768, 794, 808, 832, 846, 862, 875, 884, 896, 912, 926, 941, 956, 971, 979, 989, 1000, 1009, 1019, 1029, 1039, 1050, 1063, 1073, 1085, 1099, 1110, 1118, 1126, 1140, 1159, 1171, 1186, 1201, 1215, 1230, 1243, 1257, 1270, 1284, 1298, 1313, 1326, 1339, 1352, 1368, 1381, 1394, 1406, 1419, 1431, 1443, 1457, 1472, 1480, 1487, 1494, 1510, 1529, 1541, 1556, 1577, 1598, 1615, 1630, 1648, 1664, 1678, 1698, 1719, 1733, 1743, 1763, 1784, 1801, 1819, 1836, 1850, 1860, 1869, 1889, 1899, 1906, 1917, 1927, 1943, 1953, 1963, 1976, 1986, 1998, 2007, 2019, 2027}
+var _TokenName_index = [...]uint16{0, 12, 21, 28, 46, 58, 74, 83, 90, 102, 114, 125, 143, 156, 170, 185, 211, 238, 247, 254, 264, 277, 298, 319, 327, 338, 350, 365, 377, 392, 399, 410, 424, 433, 445, 455, 468, 477, 490, 500, 511, 519, 529, 541, 551, 559, 573, 584, 592, 602, 612, 622, 632, 642, 656, 668, 683, 699, 708, 718, 731, 748, 774, 801, 815, 839, 853, 879, 895, 908, 917, 929, 945, 959, 974, 989, 1004, 1013, 1023, 1034, 1043, 1053, 1063, 1073, 1084, 1097, 1107, 1119, 1133, 1144, 1152, 1160, 1174, 1193, 1205, 1220, 1235, 1249, 1264, 1277, 1291, 1304, 1318, 1332, 1347, 1360, 1373, 1386, 1402, 1415, 1428, 1440, 1453, 1465, 1477, 1491, 1506, 1514, 1521, 1528, 1544, 1563, 1575, 1590, 1611, 1632, 1649, 1664, 1682, 1698, 1712, 1732, 1753, 1767, 1777, 1797, 1818, 1835, 1853, 1870, 1884, 1894, 1903, 1923, 1933, 1940, 1951, 1961, 1977, 1987, 1997, 2010, 2020, 2032, 2041, 2053, 2061}
 
 func (i TokenName) String() string {
 	if i < 0 || i >= TokenName(len(_TokenName_index)-1) {

meta/type.go

@@ -0,0 +1,11 @@
+package meta
+
+// Type TODO
+type Type int
+
+//go:generate stringer -type=Type -output ./type_string.go
+const (
+	CommentType Type = iota
+	WhiteSpaceType
+	TokenType
+)

meta/type_string.go

@@ -0,0 +1,16 @@
+// Code generated by "stringer -type=Type -output ./type_string.go"; DO NOT EDIT.
+
+package meta
+
+import "strconv"
+
+const _Type_name = "CommentTypeWhiteSpaceTypeTokenType"
+
+var _Type_index = [...]uint8{0, 11, 25, 34}
+
+func (i Type) String() string {
+	if i < 0 || i >= Type(len(_Type_index)-1) {
+		return "Type(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _Type_name[_Type_index[i]:_Type_index[i+1]]
+}

meta/type_test.go

@@ -0,0 +1,29 @@
+package meta_test
+
+import (
+	"testing"
+
+	"github.com/z7zmey/php-parser/meta"
+)
+
+func TestTypeString(t *testing.T) {
+	c := meta.CommentType
+
+	expected := "CommentType"
+	actual := c.String()
+
+	if expected != actual {
+		t.Errorf("\nexpected: %s\ngot: %s\n", expected, actual)
+	}
+}
+
+func TestWrongTypeString(t *testing.T) {
+	c := meta.Type(-1)
+
+	expected := "Type(-1)"
+	actual := c.String()
+
+	if expected != actual {
+		t.Errorf("\nexpected: %s\ngot: %s\n", expected, actual)
+	}
+}

meta/white_space.go

@@ -1,37 +0,0 @@
-package meta
-
-import (
-	"github.com/z7zmey/php-parser/position"
-)
-
-type WhiteSpace struct {
-	Value     string
-	Position  *position.Position
-	TokenName TokenName
-}
-
-func NewWhiteSpace(value string, pos *position.Position) *WhiteSpace {
-	return &WhiteSpace{
-		Value:     value,
-		Position:  pos,
-		TokenName: UnknownToken,
-	}
-}
-
-// SetTokenName sets token name
-func (c *WhiteSpace) SetTokenName(tokenName TokenName) {
-	c.TokenName = tokenName
-}
-
-// GetTokenName returns token name
-func (c *WhiteSpace) GetTokenName() TokenName {
-	return c.TokenName
-}
-
-func (el *WhiteSpace) String() string {
-	return el.Value
-}
-
-func (el *WhiteSpace) GetPosition() *position.Position {
-	return el.Position
-}

meta/white_space_test.go

@@ -1,44 +0,0 @@
-package meta_test
-
-import (
-	"testing"
-
-	"github.com/z7zmey/php-parser/position"
-
-	"github.com/z7zmey/php-parser/meta"
-)
-
-func TestWhiteSpacePrint(t *testing.T) {
-	expected := "\n    "
-
-	w := meta.NewWhiteSpace(expected, nil)
-
-	actual := w.String()
-
-	if expected != actual {
-		t.Errorf("expected and actual are not equal\n")
-	}
-}
-
-func TestWhiteSpaceSetGetTokenName(t *testing.T) {
-	expected := meta.ArrayToken
-	w := meta.NewWhiteSpace("\n    ", nil)
-	w.SetTokenName(expected)
-
-	actual := w.GetTokenName()
-
-	if expected != actual {
-		t.Errorf("expected and actual are not equal\n")
-	}
-}
-
-func TestWhiteSpaceGetPosition(t *testing.T) {
-	expected := position.NewPosition(1, 1, 1, 1)
-	q := meta.NewWhiteSpace("\n    ", expected)
-
-	actual := q.GetPosition()
-
-	if expected != actual {
-		t.Errorf("expected and actual are not equal\n")
-	}
-}

node/expr/assign/n_assign.go

@@ -9,7 +9,7 @@ import (
 
 // Assign node
 type Assign struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *Assign) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Assign) AddMeta(m []meta.Meta) {
+func (n *Assign) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Assign) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_assign_ref.go

@@ -9,7 +9,7 @@ import (
 
 // Reference node
 type Reference struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *Reference) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Reference) AddMeta(m []meta.Meta) {
+func (n *Reference) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Reference) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_bitwise_and.go

@@ -9,7 +9,7 @@ import (
 
 // BitwiseAnd node
 type BitwiseAnd struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *BitwiseAnd) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *BitwiseAnd) AddMeta(m []meta.Meta) {
+func (n *BitwiseAnd) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *BitwiseAnd) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_bitwise_or.go

@@ -9,7 +9,7 @@ import (
 
 // BitwiseOr node
 type BitwiseOr struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *BitwiseOr) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *BitwiseOr) AddMeta(m []meta.Meta) {
+func (n *BitwiseOr) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *BitwiseOr) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_bitwise_xor.go

@@ -9,7 +9,7 @@ import (
 
 // BitwiseXor node
 type BitwiseXor struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *BitwiseXor) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *BitwiseXor) AddMeta(m []meta.Meta) {
+func (n *BitwiseXor) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *BitwiseXor) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_concat.go

@@ -9,7 +9,7 @@ import (
 
 // Concat node
 type Concat struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *Concat) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Concat) AddMeta(m []meta.Meta) {
+func (n *Concat) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Concat) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_div.go

@@ -9,7 +9,7 @@ import (
 
 // Div node
 type Div struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *Div) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Div) AddMeta(m []meta.Meta) {
+func (n *Div) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Div) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_minus.go

@@ -9,7 +9,7 @@ import (
 
 // Minus node
 type Minus struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *Minus) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Minus) AddMeta(m []meta.Meta) {
+func (n *Minus) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Minus) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_mod.go

@@ -9,7 +9,7 @@ import (
 
 // Mod node
 type Mod struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *Mod) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Mod) AddMeta(m []meta.Meta) {
+func (n *Mod) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Mod) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_mul.go

@@ -9,7 +9,7 @@ import (
 
 // Mul node
 type Mul struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *Mul) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Mul) AddMeta(m []meta.Meta) {
+func (n *Mul) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Mul) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_plus.go

@@ -9,7 +9,7 @@ import (
 
 // Plus node
 type Plus struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *Plus) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Plus) AddMeta(m []meta.Meta) {
+func (n *Plus) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Plus) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_pow.go

@@ -9,7 +9,7 @@ import (
 
 // Pow node
 type Pow struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *Pow) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Pow) AddMeta(m []meta.Meta) {
+func (n *Pow) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Pow) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_shift_left.go

@@ -9,7 +9,7 @@ import (
 
 // ShiftLeft node
 type ShiftLeft struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *ShiftLeft) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ShiftLeft) AddMeta(m []meta.Meta) {
+func (n *ShiftLeft) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ShiftLeft) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/n_shift_right.go

@@ -9,7 +9,7 @@ import (
 
 // ShiftRight node
 type ShiftRight struct {
-	Meta       []meta.Meta
+	Meta       meta.Collection
 	Position   *position.Position
 	Variable   node.Node
 	Expression node.Node
@@ -33,12 +33,8 @@ func (n *ShiftRight) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ShiftRight) AddMeta(m []meta.Meta) {
+func (n *ShiftRight) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ShiftRight) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/assign/t_meta_test.go

@@ -29,12 +29,20 @@ var nodes = []node.Node{
 }
 
 func TestMeta(t *testing.T) {
-	expected := []meta.Meta{
+	expected := &meta.Collection{
-		meta.NewComment("//comment\n", nil),
+		&meta.Data{
-		meta.NewWhiteSpace("    ", nil),
+			Value:    "//comment\n",
+			Type:     meta.CommentType,
+			Position: nil,
+		},
+		&meta.Data{
+			Value:    "    ",
+			Type:     meta.WhiteSpaceType,
+			Position: nil,
+		},
 	}
 	for _, n := range nodes {
-		n.AddMeta(expected)
+		n.GetMeta().Push(*expected...)
 		actual := n.GetMeta()
 		assertEqual(t, expected, actual)
 	}

node/expr/binary/n_bitwise_and.go

@@ -9,7 +9,7 @@ import (
 
 // BitwiseAnd node
 type BitwiseAnd struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *BitwiseAnd) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *BitwiseAnd) AddMeta(m []meta.Meta) {
+func (n *BitwiseAnd) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *BitwiseAnd) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_bitwise_or.go

@@ -9,7 +9,7 @@ import (
 
 // BitwiseOr node
 type BitwiseOr struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *BitwiseOr) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *BitwiseOr) AddMeta(m []meta.Meta) {
+func (n *BitwiseOr) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *BitwiseOr) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_bitwise_xor.go

@@ -9,7 +9,7 @@ import (
 
 // BitwiseXor node
 type BitwiseXor struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *BitwiseXor) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *BitwiseXor) AddMeta(m []meta.Meta) {
+func (n *BitwiseXor) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *BitwiseXor) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_boolean_and.go

@@ -9,7 +9,7 @@ import (
 
 // BooleanAnd node
 type BooleanAnd struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *BooleanAnd) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *BooleanAnd) AddMeta(m []meta.Meta) {
+func (n *BooleanAnd) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *BooleanAnd) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_boolean_or.go

@@ -9,7 +9,7 @@ import (
 
 // BooleanOr node
 type BooleanOr struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *BooleanOr) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *BooleanOr) AddMeta(m []meta.Meta) {
+func (n *BooleanOr) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *BooleanOr) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_coalesce.go

@@ -9,7 +9,7 @@ import (
 
 // Coalesce node
 type Coalesce struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Coalesce) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Coalesce) AddMeta(m []meta.Meta) {
+func (n *Coalesce) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Coalesce) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_concat.go

@@ -9,7 +9,7 @@ import (
 
 // Concat node
 type Concat struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Concat) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Concat) AddMeta(m []meta.Meta) {
+func (n *Concat) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Concat) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_div.go

@@ -9,7 +9,7 @@ import (
 
 // Div node
 type Div struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Div) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Div) AddMeta(m []meta.Meta) {
+func (n *Div) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Div) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_equal.go

@@ -9,7 +9,7 @@ import (
 
 // Equal node
 type Equal struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Equal) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Equal) AddMeta(m []meta.Meta) {
+func (n *Equal) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Equal) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_greater.go

@@ -9,7 +9,7 @@ import (
 
 // Greater node
 type Greater struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Greater) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Greater) AddMeta(m []meta.Meta) {
+func (n *Greater) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Greater) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_greater_or_equal.go

@@ -9,7 +9,7 @@ import (
 
 // GreaterOrEqual node
 type GreaterOrEqual struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *GreaterOrEqual) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *GreaterOrEqual) AddMeta(m []meta.Meta) {
+func (n *GreaterOrEqual) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *GreaterOrEqual) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_identical.go

@@ -9,7 +9,7 @@ import (
 
 // Identical node
 type Identical struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Identical) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Identical) AddMeta(m []meta.Meta) {
+func (n *Identical) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Identical) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_logical_and.go

@@ -9,7 +9,7 @@ import (
 
 // LogicalAnd node
 type LogicalAnd struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *LogicalAnd) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *LogicalAnd) AddMeta(m []meta.Meta) {
+func (n *LogicalAnd) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *LogicalAnd) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_logical_or.go

@@ -9,7 +9,7 @@ import (
 
 // LogicalOr node
 type LogicalOr struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *LogicalOr) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *LogicalOr) AddMeta(m []meta.Meta) {
+func (n *LogicalOr) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *LogicalOr) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_logical_xor.go

@@ -9,7 +9,7 @@ import (
 
 // LogicalXor node
 type LogicalXor struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *LogicalXor) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *LogicalXor) AddMeta(m []meta.Meta) {
+func (n *LogicalXor) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *LogicalXor) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_minus.go

@@ -9,7 +9,7 @@ import (
 
 // Minus node
 type Minus struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Minus) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Minus) AddMeta(m []meta.Meta) {
+func (n *Minus) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Minus) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_mod.go

@@ -9,7 +9,7 @@ import (
 
 // Mod node
 type Mod struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Mod) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Mod) AddMeta(m []meta.Meta) {
+func (n *Mod) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Mod) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_mul.go

@@ -9,7 +9,7 @@ import (
 
 // Mul node
 type Mul struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Mul) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Mul) AddMeta(m []meta.Meta) {
+func (n *Mul) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Mul) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_not_equal.go

@@ -9,7 +9,7 @@ import (
 
 // NotEqual node
 type NotEqual struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *NotEqual) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *NotEqual) AddMeta(m []meta.Meta) {
+func (n *NotEqual) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *NotEqual) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_not_identical.go

@@ -9,7 +9,7 @@ import (
 
 // NotIdentical node
 type NotIdentical struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *NotIdentical) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *NotIdentical) AddMeta(m []meta.Meta) {
+func (n *NotIdentical) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *NotIdentical) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_plus.go

@@ -9,7 +9,7 @@ import (
 
 // Plus node
 type Plus struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Plus) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Plus) AddMeta(m []meta.Meta) {
+func (n *Plus) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Plus) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_pow.go

@@ -9,7 +9,7 @@ import (
 
 // Pow node
 type Pow struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Pow) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Pow) AddMeta(m []meta.Meta) {
+func (n *Pow) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Pow) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_shift_left.go

@@ -9,7 +9,7 @@ import (
 
 // ShiftLeft node
 type ShiftLeft struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *ShiftLeft) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ShiftLeft) AddMeta(m []meta.Meta) {
+func (n *ShiftLeft) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ShiftLeft) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_shift_right.go

@@ -9,7 +9,7 @@ import (
 
 // ShiftRight node
 type ShiftRight struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *ShiftRight) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ShiftRight) AddMeta(m []meta.Meta) {
+func (n *ShiftRight) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ShiftRight) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_smaller.go

@@ -9,7 +9,7 @@ import (
 
 // Smaller node
 type Smaller struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Smaller) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Smaller) AddMeta(m []meta.Meta) {
+func (n *Smaller) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Smaller) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_smaller_or_equal.go

@@ -9,7 +9,7 @@ import (
 
 // SmallerOrEqual node
 type SmallerOrEqual struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *SmallerOrEqual) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *SmallerOrEqual) AddMeta(m []meta.Meta) {
+func (n *SmallerOrEqual) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *SmallerOrEqual) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/n_spaceship.go

@@ -9,7 +9,7 @@ import (
 
 // Spaceship node
 type Spaceship struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Left     node.Node
 	Right    node.Node
@@ -33,12 +33,8 @@ func (n *Spaceship) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Spaceship) AddMeta(m []meta.Meta) {
+func (n *Spaceship) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Spaceship) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/binary/t_meta_test.go

@@ -41,12 +41,20 @@ var nodes = []node.Node{
 }
 
 func TestMeta(t *testing.T) {
-	expected := []meta.Meta{
+	expected := &meta.Collection{
-		meta.NewComment("//comment\n", nil),
+		&meta.Data{
-		meta.NewWhiteSpace("    ", nil),
+			Value:    "//comment\n",
+			Type:     meta.CommentType,
+			Position: nil,
+		},
+		&meta.Data{
+			Value:    "    ",
+			Type:     meta.WhiteSpaceType,
+			Position: nil,
+		},
 	}
 	for _, n := range nodes {
-		n.AddMeta(expected)
+		n.GetMeta().Push(*expected...)
 		actual := n.GetMeta()
 		assertEqual(t, expected, actual)
 	}

node/expr/cast/n_cast_array.go

@@ -9,7 +9,7 @@ import (
 
 // Array node
 type Array struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Array) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Array) AddMeta(m []meta.Meta) {
+func (n *Array) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Array) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/cast/n_cast_bool.go

@@ -9,7 +9,7 @@ import (
 
 // Bool node
 type Bool struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Bool) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Bool) AddMeta(m []meta.Meta) {
+func (n *Bool) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Bool) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/cast/n_cast_double.go

@@ -9,7 +9,7 @@ import (
 
 // Double node
 type Double struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Double) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Double) AddMeta(m []meta.Meta) {
+func (n *Double) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Double) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/cast/n_cast_int.go

@@ -9,7 +9,7 @@ import (
 
 // Int node
 type Int struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Int) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Int) AddMeta(m []meta.Meta) {
+func (n *Int) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Int) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/cast/n_cast_object.go

@@ -9,7 +9,7 @@ import (
 
 // Object node
 type Object struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Object) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Object) AddMeta(m []meta.Meta) {
+func (n *Object) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Object) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/cast/n_cast_string.go

@@ -9,7 +9,7 @@ import (
 
 // String node
 type String struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *String) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *String) AddMeta(m []meta.Meta) {
+func (n *String) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *String) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/cast/n_cast_unset.go

@@ -9,7 +9,7 @@ import (
 
 // Unset node
 type Unset struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Unset) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Unset) AddMeta(m []meta.Meta) {
+func (n *Unset) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Unset) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/cast/t_meta_test.go

@@ -21,12 +21,20 @@ var nodes = []node.Node{
 }
 
 func TestMeta(t *testing.T) {
-	expected := []meta.Meta{
+	expected := &meta.Collection{
-		meta.NewComment("//comment\n", nil),
+		&meta.Data{
-		meta.NewWhiteSpace("    ", nil),
+			Value:    "//comment\n",
+			Type:     meta.CommentType,
+			Position: nil,
+		},
+		&meta.Data{
+			Value:    "    ",
+			Type:     meta.WhiteSpaceType,
+			Position: nil,
+		},
 	}
 	for _, n := range nodes {
-		n.AddMeta(expected)
+		n.GetMeta().Push(*expected...)
 		actual := n.GetMeta()
 		assertEqual(t, expected, actual)
 	}

node/expr/n_array.go

@@ -9,7 +9,7 @@ import (
 
 // Array node
 type Array struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Items    []node.Node
 }
@@ -31,12 +31,8 @@ func (n *Array) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Array) AddMeta(m []meta.Meta) {
+func (n *Array) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Array) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_array_dim_fetch.go

@@ -9,7 +9,7 @@ import (
 
 // ArrayDimFetch node
 type ArrayDimFetch struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Variable node.Node
 	Dim      node.Node
@@ -33,12 +33,8 @@ func (n *ArrayDimFetch) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ArrayDimFetch) AddMeta(m []meta.Meta) {
+func (n *ArrayDimFetch) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ArrayDimFetch) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_array_item.go

@@ -9,7 +9,7 @@ import (
 
 // ArrayItem node
 type ArrayItem struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Key      node.Node
 	Val      node.Node
@@ -33,12 +33,8 @@ func (n *ArrayItem) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ArrayItem) AddMeta(m []meta.Meta) {
+func (n *ArrayItem) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ArrayItem) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_bitwise_not.go

@@ -9,7 +9,7 @@ import (
 
 // BitwiseNot node
 type BitwiseNot struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *BitwiseNot) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *BitwiseNot) AddMeta(m []meta.Meta) {
+func (n *BitwiseNot) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *BitwiseNot) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_boolean_not.go

@@ -9,7 +9,7 @@ import (
 
 // BooleanNot node
 type BooleanNot struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *BooleanNot) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *BooleanNot) AddMeta(m []meta.Meta) {
+func (n *BooleanNot) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *BooleanNot) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_class_const_fetch.go

@@ -9,7 +9,7 @@ import (
 
 // ClassConstFetch node
 type ClassConstFetch struct {
-	Meta         []meta.Meta
+	Meta         meta.Collection
 	Position     *position.Position
 	Class        node.Node
 	ConstantName node.Node
@@ -33,12 +33,8 @@ func (n *ClassConstFetch) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ClassConstFetch) AddMeta(m []meta.Meta) {
+func (n *ClassConstFetch) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ClassConstFetch) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_clone.go

@@ -9,7 +9,7 @@ import (
 
 // Clone node
 type Clone struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Clone) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Clone) AddMeta(m []meta.Meta) {
+func (n *Clone) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Clone) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_closure.go

@@ -9,7 +9,7 @@ import (
 
 // Closure node
 type Closure struct {
-	Meta          []meta.Meta
+	Meta          meta.Collection
 	Position      *position.Position
 	ReturnsRef    bool
 	Static        bool
@@ -43,12 +43,8 @@ func (n *Closure) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Closure) AddMeta(m []meta.Meta) {
+func (n *Closure) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Closure) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_closure_use.go

@@ -9,7 +9,7 @@ import (
 
 // ClosureUse node
 type ClosureUse struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Uses     []node.Node
 }
@@ -31,12 +31,8 @@ func (n *ClosureUse) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ClosureUse) AddMeta(m []meta.Meta) {
+func (n *ClosureUse) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ClosureUse) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_const_fetch.go

@@ -9,7 +9,7 @@ import (
 
 // ConstFetch node
 type ConstFetch struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Constant node.Node
 }
@@ -31,12 +31,8 @@ func (n *ConstFetch) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ConstFetch) AddMeta(m []meta.Meta) {
+func (n *ConstFetch) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ConstFetch) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_empty.go

@@ -9,7 +9,7 @@ import (
 
 // Empty node
 type Empty struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Empty) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Empty) AddMeta(m []meta.Meta) {
+func (n *Empty) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Empty) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_error_suppress.go

@@ -9,7 +9,7 @@ import (
 
 // ErrorSuppress node
 type ErrorSuppress struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *ErrorSuppress) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ErrorSuppress) AddMeta(m []meta.Meta) {
+func (n *ErrorSuppress) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ErrorSuppress) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_eval.go

@@ -9,7 +9,7 @@ import (
 
 // Eval node
 type Eval struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Eval) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Eval) AddMeta(m []meta.Meta) {
+func (n *Eval) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Eval) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_exit.go

@@ -9,7 +9,7 @@ import (
 
 // Exit node
 type Exit struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Die      bool
 	Position *position.Position
 	Expr     node.Node
@@ -32,12 +32,8 @@ func (n *Exit) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Exit) AddMeta(m []meta.Meta) {
+func (n *Exit) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Exit) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_function_call.go

@@ -9,7 +9,7 @@ import (
 
 // FunctionCall node
 type FunctionCall struct {
-	Meta         []meta.Meta
+	Meta         meta.Collection
 	Position     *position.Position
 	Function     node.Node
 	ArgumentList *node.ArgumentList
@@ -33,12 +33,8 @@ func (n *FunctionCall) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *FunctionCall) AddMeta(m []meta.Meta) {
+func (n *FunctionCall) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *FunctionCall) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_include.go

@@ -9,7 +9,7 @@ import (
 
 // Include node
 type Include struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Include) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Include) AddMeta(m []meta.Meta) {
+func (n *Include) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Include) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_include_once.go

@@ -9,7 +9,7 @@ import (
 
 // IncludeOnce node
 type IncludeOnce struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *IncludeOnce) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *IncludeOnce) AddMeta(m []meta.Meta) {
+func (n *IncludeOnce) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *IncludeOnce) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_instance_of.go

@@ -9,7 +9,7 @@ import (
 
 // InstanceOf node
 type InstanceOf struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 	Class    node.Node
@@ -33,12 +33,8 @@ func (n *InstanceOf) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *InstanceOf) AddMeta(m []meta.Meta) {
+func (n *InstanceOf) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *InstanceOf) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_isset.go

@@ -9,7 +9,7 @@ import (
 
 // Isset node
 type Isset struct {
-	Meta      []meta.Meta
+	Meta      meta.Collection
 	Position  *position.Position
 	Variables []node.Node
 }
@@ -31,12 +31,8 @@ func (n *Isset) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Isset) AddMeta(m []meta.Meta) {
+func (n *Isset) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Isset) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_list.go

@@ -9,7 +9,7 @@ import (
 
 // List node
 type List struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Items    []node.Node
 }
@@ -31,12 +31,8 @@ func (n *List) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *List) AddMeta(m []meta.Meta) {
+func (n *List) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *List) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_method_call.go

@@ -9,7 +9,7 @@ import (
 
 // MethodCall node
 type MethodCall struct {
-	Meta         []meta.Meta
+	Meta         meta.Collection
 	Position     *position.Position
 	Variable     node.Node
 	Method       node.Node
@@ -35,12 +35,8 @@ func (n *MethodCall) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *MethodCall) AddMeta(m []meta.Meta) {
+func (n *MethodCall) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *MethodCall) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_new.go

@@ -9,7 +9,7 @@ import (
 
 // New node
 type New struct {
-	Meta         []meta.Meta
+	Meta         meta.Collection
 	Position     *position.Position
 	Class        node.Node
 	ArgumentList *node.ArgumentList
@@ -33,12 +33,8 @@ func (n *New) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *New) AddMeta(m []meta.Meta) {
+func (n *New) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *New) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_post_dec.go

@@ -9,7 +9,7 @@ import (
 
 // PostDec node
 type PostDec struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Variable node.Node
 }
@@ -31,12 +31,8 @@ func (n *PostDec) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *PostDec) AddMeta(m []meta.Meta) {
+func (n *PostDec) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *PostDec) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_post_inc.go

@@ -9,7 +9,7 @@ import (
 
 // PostInc node
 type PostInc struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Variable node.Node
 }
@@ -31,12 +31,8 @@ func (n *PostInc) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *PostInc) AddMeta(m []meta.Meta) {
+func (n *PostInc) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *PostInc) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_pre_dec.go

@@ -9,7 +9,7 @@ import (
 
 // PreDec node
 type PreDec struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Variable node.Node
 }
@@ -31,12 +31,8 @@ func (n *PreDec) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *PreDec) AddMeta(m []meta.Meta) {
+func (n *PreDec) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *PreDec) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_pre_inc.go

@@ -9,7 +9,7 @@ import (
 
 // PreInc node
 type PreInc struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Variable node.Node
 }
@@ -31,12 +31,8 @@ func (n *PreInc) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *PreInc) AddMeta(m []meta.Meta) {
+func (n *PreInc) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *PreInc) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_print.go

@@ -9,7 +9,7 @@ import (
 
 // Print node
 type Print struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Print) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Print) AddMeta(m []meta.Meta) {
+func (n *Print) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Print) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_property_fetch.go

@@ -9,7 +9,7 @@ import (
 
 // PropertyFetch node
 type PropertyFetch struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Variable node.Node
 	Property node.Node
@@ -33,12 +33,8 @@ func (n *PropertyFetch) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *PropertyFetch) AddMeta(m []meta.Meta) {
+func (n *PropertyFetch) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *PropertyFetch) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_reference.go

@@ -9,7 +9,7 @@ import (
 
 // Reference node
 type Reference struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Variable node.Node
 }
@@ -31,12 +31,8 @@ func (n *Reference) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Reference) AddMeta(m []meta.Meta) {
+func (n *Reference) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Reference) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_require.go

@@ -9,7 +9,7 @@ import (
 
 // Require node
 type Require struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *Require) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *Require) AddMeta(m []meta.Meta) {
+func (n *Require) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *Require) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_require_once.go

@@ -9,7 +9,7 @@ import (
 
 // RequireOnce node
 type RequireOnce struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Expr     node.Node
 }
@@ -31,12 +31,8 @@ func (n *RequireOnce) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *RequireOnce) AddMeta(m []meta.Meta) {
+func (n *RequireOnce) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *RequireOnce) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_shell_exec.go

@@ -9,7 +9,7 @@ import (
 
 // ShellExec node
 type ShellExec struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Parts    []node.Node
 }
@@ -31,12 +31,8 @@ func (n *ShellExec) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ShellExec) AddMeta(m []meta.Meta) {
+func (n *ShellExec) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ShellExec) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_short_array.go

@@ -9,7 +9,7 @@ import (
 
 // ShortArray node
 type ShortArray struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Items    []node.Node
 }
@@ -31,12 +31,8 @@ func (n *ShortArray) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ShortArray) AddMeta(m []meta.Meta) {
+func (n *ShortArray) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ShortArray) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map

node/expr/n_short_list.go

@@ -9,7 +9,7 @@ import (
 
 // ShortList node
 type ShortList struct {
-	Meta     []meta.Meta
+	Meta     meta.Collection
 	Position *position.Position
 	Items    []node.Node
 }
@@ -31,12 +31,8 @@ func (n *ShortList) GetPosition() *position.Position {
 	return n.Position
 }
 
-func (n *ShortList) AddMeta(m []meta.Meta) {
+func (n *ShortList) GetMeta() *meta.Collection {
-	n.Meta = append(n.Meta, m...)
+	return &n.Meta
-}
-
-func (n *ShortList) GetMeta() []meta.Meta {
-	return n.Meta
 }
 
 // Attributes returns node attributes as map