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How to use walk method of ast Package

Best Syzkaller code snippet using ast.walk

fix.go

Source:fix.go

...32var fixes []fix33func register(f fix) {34	fixes = append(fixes, f)35}36// walk traverses the AST x, calling visit(y) for each node y in the tree but37// also with a pointer to each ast.Expr, ast.Stmt, and *ast.BlockStmt,38// in a bottom-up traversal.39func walk(x interface{}, visit func(interface{})) {40	walkBeforeAfter(x, nop, visit)41}42func nop(interface{}) {}43// walkBeforeAfter is like walk but calls before(x) before traversing44// x's children and after(x) afterward.45func walkBeforeAfter(x interface{}, before, after func(interface{})) {46	before(x)47	switch n := x.(type) {48	default:49		panic(fmt.Errorf("unexpected type %T in walkBeforeAfter", x))50	case nil:51	// pointers to interfaces52	case *ast.Decl:53		walkBeforeAfter(*n, before, after)54	case *ast.Expr:55		walkBeforeAfter(*n, before, after)56	case *ast.Spec:57		walkBeforeAfter(*n, before, after)58	case *ast.Stmt:59		walkBeforeAfter(*n, before, after)60	// pointers to struct pointers61	case **ast.BlockStmt:62		walkBeforeAfter(*n, before, after)63	case **ast.CallExpr:64		walkBeforeAfter(*n, before, after)65	case **ast.FieldList:66		walkBeforeAfter(*n, before, after)67	case **ast.FuncType:68		walkBeforeAfter(*n, before, after)69	case **ast.Ident:70		walkBeforeAfter(*n, before, after)71	case **ast.BasicLit:72		walkBeforeAfter(*n, before, after)73	// pointers to slices74	case *[]ast.Decl:75		walkBeforeAfter(*n, before, after)76	case *[]ast.Expr:77		walkBeforeAfter(*n, before, after)78	case *[]*ast.File:79		walkBeforeAfter(*n, before, after)80	case *[]*ast.Ident:81		walkBeforeAfter(*n, before, after)82	case *[]ast.Spec:83		walkBeforeAfter(*n, before, after)84	case *[]ast.Stmt:85		walkBeforeAfter(*n, before, after)86	// These are ordered and grouped to match ../../pkg/go/ast/ast.go87	case *ast.Field:88		walkBeforeAfter(&n.Names, before, after)89		walkBeforeAfter(&n.Type, before, after)90		walkBeforeAfter(&n.Tag, before, after)91	case *ast.FieldList:92		for _, field := range n.List {93			walkBeforeAfter(field, before, after)94		}95	case *ast.BadExpr:96	case *ast.Ident:97	case *ast.Ellipsis:98		walkBeforeAfter(&n.Elt, before, after)99	case *ast.BasicLit:100	case *ast.FuncLit:101		walkBeforeAfter(&n.Type, before, after)102		walkBeforeAfter(&n.Body, before, after)103	case *ast.CompositeLit:104		walkBeforeAfter(&n.Type, before, after)105		walkBeforeAfter(&n.Elts, before, after)106	case *ast.ParenExpr:107		walkBeforeAfter(&n.X, before, after)108	case *ast.SelectorExpr:109		walkBeforeAfter(&n.X, before, after)110	case *ast.IndexExpr:111		walkBeforeAfter(&n.X, before, after)112		walkBeforeAfter(&n.Index, before, after)113	case *ast.SliceExpr:114		walkBeforeAfter(&n.X, before, after)115		if n.Low != nil {116			walkBeforeAfter(&n.Low, before, after)117		}118		if n.High != nil {119			walkBeforeAfter(&n.High, before, after)120		}121	case *ast.TypeAssertExpr:122		walkBeforeAfter(&n.X, before, after)123		walkBeforeAfter(&n.Type, before, after)124	case *ast.CallExpr:125		walkBeforeAfter(&n.Fun, before, after)126		walkBeforeAfter(&n.Args, before, after)127	case *ast.StarExpr:128		walkBeforeAfter(&n.X, before, after)129	case *ast.UnaryExpr:130		walkBeforeAfter(&n.X, before, after)131	case *ast.BinaryExpr:132		walkBeforeAfter(&n.X, before, after)133		walkBeforeAfter(&n.Y, before, after)134	case *ast.KeyValueExpr:135		walkBeforeAfter(&n.Key, before, after)136		walkBeforeAfter(&n.Value, before, after)137	case *ast.ArrayType:138		walkBeforeAfter(&n.Len, before, after)139		walkBeforeAfter(&n.Elt, before, after)140	case *ast.StructType:141		walkBeforeAfter(&n.Fields, before, after)142	case *ast.FuncType:143		walkBeforeAfter(&n.Params, before, after)144		if n.Results != nil {145			walkBeforeAfter(&n.Results, before, after)146		}147	case *ast.InterfaceType:148		walkBeforeAfter(&n.Methods, before, after)149	case *ast.MapType:150		walkBeforeAfter(&n.Key, before, after)151		walkBeforeAfter(&n.Value, before, after)152	case *ast.ChanType:153		walkBeforeAfter(&n.Value, before, after)154	case *ast.BadStmt:155	case *ast.DeclStmt:156		walkBeforeAfter(&n.Decl, before, after)157	case *ast.EmptyStmt:158	case *ast.LabeledStmt:159		walkBeforeAfter(&n.Stmt, before, after)160	case *ast.ExprStmt:161		walkBeforeAfter(&n.X, before, after)162	case *ast.SendStmt:163		walkBeforeAfter(&n.Chan, before, after)164		walkBeforeAfter(&n.Value, before, after)165	case *ast.IncDecStmt:166		walkBeforeAfter(&n.X, before, after)167	case *ast.AssignStmt:168		walkBeforeAfter(&n.Lhs, before, after)169		walkBeforeAfter(&n.Rhs, before, after)170	case *ast.GoStmt:171		walkBeforeAfter(&n.Call, before, after)172	case *ast.DeferStmt:173		walkBeforeAfter(&n.Call, before, after)174	case *ast.ReturnStmt:175		walkBeforeAfter(&n.Results, before, after)176	case *ast.BranchStmt:177	case *ast.BlockStmt:178		walkBeforeAfter(&n.List, before, after)179	case *ast.IfStmt:180		walkBeforeAfter(&n.Init, before, after)181		walkBeforeAfter(&n.Cond, before, after)182		walkBeforeAfter(&n.Body, before, after)183		walkBeforeAfter(&n.Else, before, after)184	case *ast.CaseClause:185		walkBeforeAfter(&n.List, before, after)186		walkBeforeAfter(&n.Body, before, after)187	case *ast.SwitchStmt:188		walkBeforeAfter(&n.Init, before, after)189		walkBeforeAfter(&n.Tag, before, after)190		walkBeforeAfter(&n.Body, before, after)191	case *ast.TypeSwitchStmt:192		walkBeforeAfter(&n.Init, before, after)193		walkBeforeAfter(&n.Assign, before, after)194		walkBeforeAfter(&n.Body, before, after)195	case *ast.CommClause:196		walkBeforeAfter(&n.Comm, before, after)197		walkBeforeAfter(&n.Body, before, after)198	case *ast.SelectStmt:199		walkBeforeAfter(&n.Body, before, after)200	case *ast.ForStmt:201		walkBeforeAfter(&n.Init, before, after)202		walkBeforeAfter(&n.Cond, before, after)203		walkBeforeAfter(&n.Post, before, after)204		walkBeforeAfter(&n.Body, before, after)205	case *ast.RangeStmt:206		walkBeforeAfter(&n.Key, before, after)207		walkBeforeAfter(&n.Value, before, after)208		walkBeforeAfter(&n.X, before, after)209		walkBeforeAfter(&n.Body, before, after)210	case *ast.ImportSpec:211	case *ast.ValueSpec:212		walkBeforeAfter(&n.Type, before, after)213		walkBeforeAfter(&n.Values, before, after)214		walkBeforeAfter(&n.Names, before, after)215	case *ast.TypeSpec:216		walkBeforeAfter(&n.Type, before, after)217	case *ast.BadDecl:218	case *ast.GenDecl:219		walkBeforeAfter(&n.Specs, before, after)220	case *ast.FuncDecl:221		if n.Recv != nil {222			walkBeforeAfter(&n.Recv, before, after)223		}224		walkBeforeAfter(&n.Type, before, after)225		if n.Body != nil {226			walkBeforeAfter(&n.Body, before, after)227		}228	case *ast.File:229		walkBeforeAfter(&n.Decls, before, after)230	case *ast.Package:231		walkBeforeAfter(&n.Files, before, after)232	case []*ast.File:233		for i := range n {234			walkBeforeAfter(&n[i], before, after)235		}236	case []ast.Decl:237		for i := range n {238			walkBeforeAfter(&n[i], before, after)239		}240	case []ast.Expr:241		for i := range n {242			walkBeforeAfter(&n[i], before, after)243		}244	case []*ast.Ident:245		for i := range n {246			walkBeforeAfter(&n[i], before, after)247		}248	case []ast.Stmt:249		for i := range n {250			walkBeforeAfter(&n[i], before, after)251		}252	case []ast.Spec:253		for i := range n {254			walkBeforeAfter(&n[i], before, after)255		}256	}257	after(x)258}259// imports returns true if f imports path.260func imports(f *ast.File, path string) bool {261	return importSpec(f, path) != nil262}263// importSpec returns the import spec if f imports path,264// or nil otherwise.265func importSpec(f *ast.File, path string) *ast.ImportSpec {266	for _, s := range f.Imports {267		if importPath(s) == path {268			return s269		}270	}271	return nil272}273// importPath returns the unquoted import path of s,274// or "" if the path is not properly quoted.275func importPath(s *ast.ImportSpec) string {276	t, err := strconv.Unquote(s.Path.Value)277	if err == nil {278		return t279	}280	return ""281}282// declImports reports whether gen contains an import of path.283func declImports(gen *ast.GenDecl, path string) bool {284	if gen.Tok != token.IMPORT {285		return false286	}287	for _, spec := range gen.Specs {288		impspec := spec.(*ast.ImportSpec)289		if importPath(impspec) == path {290			return true291		}292	}293	return false294}295// isPkgDot returns true if t is the expression "pkg.name"296// where pkg is an imported identifier.297func isPkgDot(t ast.Expr, pkg, name string) bool {298	sel, ok := t.(*ast.SelectorExpr)299	return ok && isTopName(sel.X, pkg) && sel.Sel.String() == name300}301// isPtrPkgDot returns true if f is the expression "*pkg.name"302// where pkg is an imported identifier.303func isPtrPkgDot(t ast.Expr, pkg, name string) bool {304	ptr, ok := t.(*ast.StarExpr)305	return ok && isPkgDot(ptr.X, pkg, name)306}307// isTopName returns true if n is a top-level unresolved identifier with the given name.308func isTopName(n ast.Expr, name string) bool {309	id, ok := n.(*ast.Ident)310	return ok && id.Name == name && id.Obj == nil311}312// isName returns true if n is an identifier with the given name.313func isName(n ast.Expr, name string) bool {314	id, ok := n.(*ast.Ident)315	return ok && id.String() == name316}317// isCall returns true if t is a call to pkg.name.318func isCall(t ast.Expr, pkg, name string) bool {319	call, ok := t.(*ast.CallExpr)320	return ok && isPkgDot(call.Fun, pkg, name)321}322// If n is an *ast.Ident, isIdent returns it; otherwise isIdent returns nil.323func isIdent(n interface{}) *ast.Ident {324	id, _ := n.(*ast.Ident)325	return id326}327// refersTo returns true if n is a reference to the same object as x.328func refersTo(n ast.Node, x *ast.Ident) bool {329	id, ok := n.(*ast.Ident)330	// The test of id.Name == x.Name handles top-level unresolved331	// identifiers, which all have Obj == nil.332	return ok && id.Obj == x.Obj && id.Name == x.Name333}334// isBlank returns true if n is the blank identifier.335func isBlank(n ast.Expr) bool {336	return isName(n, "_")337}338// isEmptyString returns true if n is an empty string literal.339func isEmptyString(n ast.Expr) bool {340	lit, ok := n.(*ast.BasicLit)341	return ok && lit.Kind == token.STRING && len(lit.Value) == 2342}343func warn(pos token.Pos, msg string, args ...interface{}) {344	if pos.IsValid() {345		msg = "%s: " + msg346		arg1 := []interface{}{fset.Position(pos).String()}347		args = append(arg1, args...)348	}349	fmt.Fprintf(os.Stderr, msg+"\n", args...)350}351// countUses returns the number of uses of the identifier x in scope.352func countUses(x *ast.Ident, scope []ast.Stmt) int {353	count := 0354	ff := func(n interface{}) {355		if n, ok := n.(ast.Node); ok && refersTo(n, x) {356			count++357		}358	}359	for _, n := range scope {360		walk(n, ff)361	}362	return count363}364// rewriteUses replaces all uses of the identifier x and !x in scope365// with f(x.Pos()) and fnot(x.Pos()).366func rewriteUses(x *ast.Ident, f, fnot func(token.Pos) ast.Expr, scope []ast.Stmt) {367	var lastF ast.Expr368	ff := func(n interface{}) {369		ptr, ok := n.(*ast.Expr)370		if !ok {371			return372		}373		nn := *ptr374		// The child node was just walked and possibly replaced.375		// If it was replaced and this is a negation, replace with fnot(p).376		not, ok := nn.(*ast.UnaryExpr)377		if ok && not.Op == token.NOT && not.X == lastF {378			*ptr = fnot(nn.Pos())379			return380		}381		if refersTo(nn, x) {382			lastF = f(nn.Pos())383			*ptr = lastF384		}385	}386	for _, n := range scope {387		walk(n, ff)388	}389}390// assignsTo returns true if any of the code in scope assigns to or takes the address of x.391func assignsTo(x *ast.Ident, scope []ast.Stmt) bool {392	assigned := false393	ff := func(n interface{}) {394		if assigned {395			return396		}397		switch n := n.(type) {398		case *ast.UnaryExpr:399			// use of &x400			if n.Op == token.AND && refersTo(n.X, x) {401				assigned = true402				return403			}404		case *ast.AssignStmt:405			for _, l := range n.Lhs {406				if refersTo(l, x) {407					assigned = true408					return409				}410			}411		}412	}413	for _, n := range scope {414		if assigned {415			break416		}417		walk(n, ff)418	}419	return assigned420}421// newPkgDot returns an ast.Expr referring to "pkg.name" at position pos.422func newPkgDot(pos token.Pos, pkg, name string) ast.Expr {423	return &ast.SelectorExpr{424		X: &ast.Ident{425			NamePos: pos,426			Name:    pkg,427		},428		Sel: &ast.Ident{429			NamePos: pos,430			Name:    name,431		},432	}433}434// renameTop renames all references to the top-level name old.435// It returns true if it makes any changes.436func renameTop(f *ast.File, old, new string) bool {437	var fixed bool438	// Rename any conflicting imports439	// (assuming package name is last element of path).440	for _, s := range f.Imports {441		if s.Name != nil {442			if s.Name.Name == old {443				s.Name.Name = new444				fixed = true445			}446		} else {447			_, thisName := path.Split(importPath(s))448			if thisName == old {449				s.Name = ast.NewIdent(new)450				fixed = true451			}452		}453	}454	// Rename any top-level declarations.455	for _, d := range f.Decls {456		switch d := d.(type) {457		case *ast.FuncDecl:458			if d.Recv == nil && d.Name.Name == old {459				d.Name.Name = new460				d.Name.Obj.Name = new461				fixed = true462			}463		case *ast.GenDecl:464			for _, s := range d.Specs {465				switch s := s.(type) {466				case *ast.TypeSpec:467					if s.Name.Name == old {468						s.Name.Name = new469						s.Name.Obj.Name = new470						fixed = true471					}472				case *ast.ValueSpec:473					for _, n := range s.Names {474						if n.Name == old {475							n.Name = new476							n.Obj.Name = new477							fixed = true478						}479					}480				}481			}482		}483	}484	// Rename top-level old to new, both unresolved names485	// (probably defined in another file) and names that resolve486	// to a declaration we renamed.487	walk(f, func(n interface{}) {488		id, ok := n.(*ast.Ident)489		if ok && isTopName(id, old) {490			id.Name = new491			fixed = true492		}493		if ok && id.Obj != nil && id.Name == old && id.Obj.Name == new {494			id.Name = id.Obj.Name495			fixed = true496		}497	})498	return fixed499}500// matchLen returns the length of the longest prefix shared by x and y.501func matchLen(x, y string) int {502	i := 0503	for i < len(x) && i < len(y) && x[i] == y[i] {504		i++505	}506	return i507}508// addImport adds the import path to the file f, if absent.509func addImport(f *ast.File, ipath string) (added bool) {510	if imports(f, ipath) {511		return false512	}513	// Determine name of import.514	// Assume added imports follow convention of using last element.515	_, name := path.Split(ipath)516	// Rename any conflicting top-level references from name to name_.517	renameTop(f, name, name+"_")518	newImport := &ast.ImportSpec{519		Path: &ast.BasicLit{520			Kind:  token.STRING,521			Value: strconv.Quote(ipath),522		},523	}524	// Find an import decl to add to.525	var (526		bestMatch  = -1527		lastImport = -1528		impDecl    *ast.GenDecl529		impIndex   = -1530	)531	for i, decl := range f.Decls {532		gen, ok := decl.(*ast.GenDecl)533		if ok && gen.Tok == token.IMPORT {534			lastImport = i535			// Do not add to import "C", to avoid disrupting the536			// association with its doc comment, breaking cgo.537			if declImports(gen, "C") {538				continue539			}540			// Compute longest shared prefix with imports in this block.541			for j, spec := range gen.Specs {542				impspec := spec.(*ast.ImportSpec)543				n := matchLen(importPath(impspec), ipath)544				if n > bestMatch {545					bestMatch = n546					impDecl = gen547					impIndex = j548				}549			}550		}551	}552	// If no import decl found, add one after the last import.553	if impDecl == nil {554		impDecl = &ast.GenDecl{555			Tok: token.IMPORT,556		}557		f.Decls = append(f.Decls, nil)558		copy(f.Decls[lastImport+2:], f.Decls[lastImport+1:])559		f.Decls[lastImport+1] = impDecl560	}561	// Ensure the import decl has parentheses, if needed.562	if len(impDecl.Specs) > 0 && !impDecl.Lparen.IsValid() {563		impDecl.Lparen = impDecl.Pos()564	}565	insertAt := impIndex + 1566	if insertAt == 0 {567		insertAt = len(impDecl.Specs)568	}569	impDecl.Specs = append(impDecl.Specs, nil)570	copy(impDecl.Specs[insertAt+1:], impDecl.Specs[insertAt:])571	impDecl.Specs[insertAt] = newImport572	if insertAt > 0 {573		// Assign same position as the previous import,574		// so that the sorter sees it as being in the same block.575		prev := impDecl.Specs[insertAt-1]576		newImport.Path.ValuePos = prev.Pos()577		newImport.EndPos = prev.Pos()578	}579	f.Imports = append(f.Imports, newImport)580	return true581}582// deleteImport deletes the import path from the file f, if present.583func deleteImport(f *ast.File, path string) (deleted bool) {584	oldImport := importSpec(f, path)585	// Find the import node that imports path, if any.586	for i, decl := range f.Decls {587		gen, ok := decl.(*ast.GenDecl)588		if !ok || gen.Tok != token.IMPORT {589			continue590		}591		for j, spec := range gen.Specs {592			impspec := spec.(*ast.ImportSpec)593			if oldImport != impspec {594				continue595			}596			// We found an import spec that imports path.597			// Delete it.598			deleted = true599			copy(gen.Specs[j:], gen.Specs[j+1:])600			gen.Specs = gen.Specs[:len(gen.Specs)-1]601			// If this was the last import spec in this decl,602			// delete the decl, too.603			if len(gen.Specs) == 0 {604				copy(f.Decls[i:], f.Decls[i+1:])605				f.Decls = f.Decls[:len(f.Decls)-1]606			} else if len(gen.Specs) == 1 {607				gen.Lparen = token.NoPos // drop parens608			}609			if j > 0 {610				// We deleted an entry but now there will be611				// a blank line-sized hole where the import was.612				// Close the hole by making the previous613				// import appear to "end" where this one did.614				gen.Specs[j-1].(*ast.ImportSpec).EndPos = impspec.End()615			}616			break617		}618	}619	// Delete it from f.Imports.620	for i, imp := range f.Imports {621		if imp == oldImport {622			copy(f.Imports[i:], f.Imports[i+1:])623			f.Imports = f.Imports[:len(f.Imports)-1]624			break625		}626	}627	return628}629// rewriteImport rewrites any import of path oldPath to path newPath.630func rewriteImport(f *ast.File, oldPath, newPath string) (rewrote bool) {631	for _, imp := range f.Imports {632		if importPath(imp) == oldPath {633			rewrote = true634			// record old End, because the default is to compute635			// it using the length of imp.Path.Value.636			imp.EndPos = imp.End()637			imp.Path.Value = strconv.Quote(newPath)638		}639	}640	return641}642func usesImport(f *ast.File, path string) (used bool) {643	spec := importSpec(f, path)644	if spec == nil {645		return646	}647	name := spec.Name.String()648	switch name {649	case "<nil>":650		// If the package name is not explicitly specified,651		// make an educated guess. This is not guaranteed to be correct.652		lastSlash := strings.LastIndex(path, "/")653		if lastSlash == -1 {654			name = path655		} else {656			name = path[lastSlash+1:]657		}658	case "_", ".":659		// Not sure if this import is used - err on the side of caution.660		return true661	}662	walk(f, func(n interface{}) {663		sel, ok := n.(*ast.SelectorExpr)664		if ok && isTopName(sel.X, name) {665			used = true666		}667	})668	return669}670func expr(s string) ast.Expr {671	x, err := parser.ParseExpr(s)672	if err != nil {673		panic("parsing " + s + ": " + err.Error())674	}675	// Remove position information to avoid spurious newlines.676	killPos(reflect.ValueOf(x))677	return x678}679var posType = reflect.TypeOf(token.Pos(0))680func killPos(v reflect.Value) {681	switch v.Kind() {682	case reflect.Ptr, reflect.Interface:683		if !v.IsNil() {684			killPos(v.Elem())685		}686	case reflect.Slice:687		n := v.Len()688		for i := 0; i < n; i++ {689			killPos(v.Index(i))690		}691	case reflect.Struct:692		n := v.NumField()693		for i := 0; i < n; i++ {694			f := v.Field(i)695			if f.Type() == posType {696				f.SetInt(0)697				continue698			}699			killPos(f)700		}701	}702}703// A Rename describes a single renaming.704type rename struct {705	OldImport string // only apply rename if this import is present706	NewImport string // add this import during rewrite707	Old       string // old name: p.T or *p.T708	New       string // new name: p.T or *p.T709}710func renameFix(tab []rename) func(*ast.File) bool {711	return func(f *ast.File) bool {712		return renameFixTab(f, tab)713	}714}715func parseName(s string) (ptr bool, pkg, nam string) {716	i := strings.Index(s, ".")717	if i < 0 {718		panic("parseName: invalid name " + s)719	}720	if strings.HasPrefix(s, "*") {721		ptr = true722		s = s[1:]723		i--724	}725	pkg = s[:i]726	nam = s[i+1:]727	return728}729func renameFixTab(f *ast.File, tab []rename) bool {730	fixed := false731	added := map[string]bool{}732	check := map[string]bool{}733	for _, t := range tab {734		if !imports(f, t.OldImport) {735			continue736		}737		optr, opkg, onam := parseName(t.Old)738		walk(f, func(n interface{}) {739			np, ok := n.(*ast.Expr)740			if !ok {741				return742			}743			x := *np744			if optr {745				p, ok := x.(*ast.StarExpr)746				if !ok {747					return748				}749				x = p.X750			}751			if !isPkgDot(x, opkg, onam) {752				return...

walk

Using AI Code Generation

1import (2func main() {3	f, err := parser.ParseFile(fset, "2.go", nil, 0)4	if err != nil {5		fmt.Println(err)6	}7	ast.Inspect(f, func(n ast.Node) bool {8		switch x := n.(type) {9			fmt.Println(x.Name.Name)10		}11	})12}13import (14func main() {15	f, err := parser.ParseFile(fset, "3.go", nil, 0)16	if err != nil {17		fmt.Println(err)18	}19	ast.Inspect(f, func(n ast.Node) bool {20		switch x := n.(type) {21			fmt.Println(x.Name.Name)22			for _, param := range x.Type.Params.List {23				fmt.Println(param.Type)24			}25			for _, ret := range x.Type.Results.List {26				fmt.Println(ret.Type)27			}28		}29	})30}31import (32func main() {33	f, err := parser.ParseFile(fset, "4.go", nil, 0)34	if err != nil {35		fmt.Println(err)

walk

Using AI Code Generation

1import (2func main() {3	f, err := parser.ParseFile(fset, "1.go", nil, parser.ParseComments)4	if err != nil {5		fmt.Println(err)6	}7	ast.Inspect(f, func(n ast.Node) bool {8		switch x := n.(type) {9			fmt.Printf("%s: %s10", fset.Position(x.Pos()), x.Name)11		}12	})13}

walk

Using AI Code Generation

1import (2func main() {3    fset := token.NewFileSet()4    node, err := parser.ParseFile(fset, "1.go", nil, parser.ParseComments)5    if err != nil {6        panic(err)7    }8    ast.Inspect(node, func(n ast.Node) bool {9        switch x := n.(type) {10            fmt.Println(x.Name)11        }12    })13}14import15{16    (17    (18    {19        (20    }21    (22    (23    {24        (type25        {26            (27        }28    }29}30import (31func main() {32    fset := token.NewFileSet()33    node, err := parser.ParseFile(fset, "1.go", nil, parser.ParseComments)34    if err != nil {35        panic(err)36    }37    ast.Inspect(node, func(n ast.Node) bool {

walk

Using AI Code Generation

1import (2func main() {3    if len(os.Args) < 2 {4        fmt.Println("Please provide a file name")5        os.Exit(1)6    }7    file, err := parser.ParseFile(fset, os.Args[1], nil, parser.ParseComments)8    if err != nil {9        fmt.Println(err)10        os.Exit(1)11    }12    ast.Walk(&astPrinter{fset}, file)13}14type astPrinter struct {15}16func (v *astPrinter) Visit(node ast.Node) ast.Visitor {17    if node == nil {18    }19    switch x := node.(type) {20        fmt.Printf("%s: %s

walk

Using AI Code Generation

1import (2func main() {3	import "fmt"4	func main() {5		fmt.Println("Hello, world.")6	}7	f, err := parser.ParseFile(fset, "src.go", src, parser.ParseComments)8	if err != nil {9		fmt.Println(err)10	}11	ast.Inspect(f, func(n ast.Node) bool {12		switch x := n.(type) {13			fmt.Println(x.Name)14		}15	})16}17Your name to display (optional):

walk

Using AI Code Generation

1import (2func main() {3import "fmt"4func main() {5    fmt.Println("Hello, World!")6}7    fset := token.NewFileSet()8    f, _ := parser.ParseFile(fset, "", src, 0)9    ast.Inspect(f, func(n ast.Node) bool {10        switch x := n.(type) {11            fmt.Println(x.Name)12        }13    })14}

walk

Using AI Code Generation

1import (2func main() {3    import "fmt"4    func main() {5        fmt.Println("Hello, playground")6    }7    f, err := parser.ParseFile(fset, "src.go", src, parser.ImportsOnly)8    if err != nil {9        panic(err)10    }11    for _, s := range f.Imports {12        fmt.Println(s.Path.Value)13    }14}15import (16func main() {17    import "fmt"18    func main() {19        fmt.Println("Hello, playground")20    }21    f, err := parser.ParseFile(fset, "src.go", src, parser.ImportsOnly)22    if err != nil {23        panic(err)24    }25    for _, s := range f.Imports {26        fmt.Println(s.Path.Value)27    }28}29import (30func main() {31    import "fmt"32    func main() {33        fmt.Println("Hello, playground")34    }35    f, err := parser.ParseFile(fset, "src.go", src, parser.ImportsOnly)36    if err != nil {37        panic(err)38    }39    for _, s := range f.Imports {40        fmt.Println(s.Path.Value

walk

Using AI Code Generation

1import (2func main() {3	fset := token.NewFileSet()4	node, err := parser.ParseFile(fset, "1.go", nil, 0)5	if err != nil {6		fmt.Println(err)7		os.Exit(1)8	}9	ast.Walk(visitor{}, node)10}11type visitor struct{}12func (v visitor) Visit(node ast.Node) ast.Visitor {13	switch n := node.(type) {14		fmt.Println(n.Name.Name)15	}16}17import (18func main() {19	fset := token.NewFileSet()20	node, err := parser.ParseFile(fset, "1.go", nil, 0)21	if err != nil {22		fmt.Println(err)23		os.Exit(1)24	}25	ast.Walk(visitor{}, node)26}27type visitor struct{}28func (v visitor) Visit(node ast.Node) ast.Visitor {29	switch n := node.(type) {30		fmt.Println(n.Name.Name, n.Name.Pos())31	}32}33import (34func main() {35	fset := token.NewFileSet()36	node, err := parser.ParseFile(fset, "1.go", nil, 0)37	if err != nil {38		fmt.Println(err)39		os.Exit(1)40	}41	ast.Walk(visitor{}, node)42}43type visitor struct{}44func (v visitor) Visit(node ast.Node) ast.Visitor {45	switch n := node.(type) {

walk

Using AI Code Generation

1import (2func main() {3	f, err := parser.ParseFile(fset, "1.go", nil, parser.ParseComments)4	if err != nil {5		log.Fatal(err)6	}7	fmt.Println("imports from 1.go:")8	for _, s := range f.Imports {9		fmt.Println(s.Path.Value)10	}11	f, err = parser.ParseFile(fset, "2.go", nil, parser.ParseComments)12	if err != nil {13		log.Fatal(err)14	}15	fmt.Println("imports from 2.go:")16	for _, s := range f.Imports {17		fmt.Println(s.Path.Value)18	}19	f, err = parser.ParseFile(fset, "3.go", nil, parser.ParseComments)20	if err != nil {21		log.Fatal(err)22	}23	fmt.Println("imports from 3.go:")24	for _, s := range f.Imports {25		fmt.Println(s.Path.Value)26	}27	f, err = parser.ParseFile(fset, "4.go", nil, parser.ParseComments)28	if err != nil {29		log.Fatal(err)30	}31	fmt.Println("imports from 4.go:")32	for _, s := range f.Imports {33		fmt.Println(s.Path.Value)34	}35	f, err = parser.ParseFile(fset, "5.go", nil, parser.ParseComments)36	if err != nil {37		log.Fatal(err)38	}39	fmt.Println("imports from 5.go:")40	for _, s := range f.Imports {41		fmt.Println(s.Path.Value)42	}43	f, err = parser.ParseFile(fset, "6.go", nil, parser.ParseComments)

walk

Using AI Code Generation

1import (2func main() {3	fset := token.NewFileSet()4	f, err := parser.ParseFile(fset, "1.go", nil, 0)5	if err != nil {6		log.Fatal(err)7	}8	ast.Inspect(f, func(n ast.Node) bool {9		switch x := n.(type) {10			fmt.Println(x.Name)11		}12	})13}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.