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How to use layoutStructFields method of compiler Package

Best Syzkaller code snippet using compiler.layoutStructFields

gen.go

Source:gen.go

...251		}252	}253	attrs := comp.parseAttrs(structAttrs, structNode, structNode.Attrs)254	t.AlignAttr = attrs[attrAlign]255	comp.layoutStructFields(t, varlen, attrs[attrPacked] != 0)256	t.TypeSize = 0257	if !varlen {258		for _, f := range t.Fields {259			t.TypeSize += f.Size()260		}261		sizeAttr, hasSize := attrs[attrSize]262		if hasSize {263			if t.TypeSize > sizeAttr {264				comp.error(structNode.Attrs[0].Pos, "struct %v has size attribute %v"+265					" which is less than struct size %v",266					structNode.Name.Name, sizeAttr, t.TypeSize)267			}268			if pad := sizeAttr - t.TypeSize; pad != 0 {269				t.Fields = append(t.Fields, genPad(pad))270			}271			t.TypeSize = sizeAttr272		}273	}274}275func (comp *compiler) layoutStructFields(t *prog.StructType, varlen, packed bool) {276	var newFields []prog.Field277	var structAlign, byteOffset, bitOffset uint64278	for i, field := range t.Fields {279		f := field.Type280		fieldAlign := uint64(1)281		if !packed {282			fieldAlign = comp.typeAlign(f)283			if structAlign < fieldAlign {284				structAlign = fieldAlign285			}286		}287		fullBitOffset := byteOffset*8 + bitOffset288		var fieldOffset uint64289		if f.IsBitfield() {...

layoutStructFields

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	}

layoutStructFields

Using AI Code Generation

1import (2type S struct {3}4func main() {5    s := S{}6    t := reflect.TypeOf(s)7    for i := 0; i < t.NumField(); i++ {8        f := t.Field(i)9        fmt.Println(f.Name, f.Offset)10    }11}

layoutStructFields

Using AI Code Generation

1import (2type Employee struct {3}4func main() {5	e := Employee{1, "Sam", 25}6	t := reflect.TypeOf(e)7	layoutStructFields(t)8}9func layoutStructFields(t reflect.Type) {10	for i := 0; i < t.NumField(); i++ {11		fmt.Printf("Field: %v12", t.Field(i).Name)13	}14}15import (16type Employee struct {17}18func main() {19	e := Employee{1, "Sam", 25}20	t := reflect.TypeOf(e)21	v := reflect.ValueOf(e)22	layoutStructFields(t, v)23}24func layoutStructFields(t reflect.Type, v reflect.Value) {25	for i := 0; i < t.NumField(); i++ {26		f := t.Field(i)27		val := v.FieldByName(f.Name).Interface()28		fmt.Printf("Field: %v, Value: %v29	}30}

layoutStructFields

Using AI Code Generation

1import (2type compiler struct {3}4func main() {5	fset := token.NewFileSet()6	file, err := parser.ParseFile(fset, "1.go", nil, 0)7	if err != nil {8		log.Fatal(err)9	}10	conf := types.Config{Importer: importer{fset: fset}}11	pkg, err := conf.Check("1.go", fset, []*ast.File{file}, nil)12	if err != nil {13		log.Fatal(err)14	}15	c := compiler{fset: fset, pkg: pkg}16	c.layoutStructFields(file)17}18func (c *compiler) layoutStructFields(file *ast.File) {19	for _, decl := range file.Decls {20		if genDecl, ok := decl.(*ast.GenDecl); ok {21			for _, spec := range genDecl.Specs {22				if typeSpec, ok := spec.(*ast.TypeSpec); ok {23					if structType, ok := typeSpec.Type.(*ast.StructType); ok {24						fmt.Printf("struct %s25						for _, field := range structType.Fields.List {26							if len(field.Names) == 0 {27								fmt.Printf("\t%s28", c.exprString(field.Type))29							} else {30								for _, name := range field.Names {31									fmt.Printf("\t%s %s32", name.Name, c.exprString(field.Type))33								}34							}35						}36					}37				}38			}39		}40	}41}42func (c *compiler) exprString(expr ast.Expr) string {43	c.printExpr(&buf, expr)44	return buf.String()45}46func (c *compiler) printExpr(buf *strings.Builder, expr ast.Expr) {47	switch expr := expr.(type) {48		buf.WriteString(expr.Name)49		buf.WriteByte('*')50		c.printExpr(buf, expr.X)51		c.printExpr(buf, expr.X)52		buf.WriteByte('.')53		c.printExpr(buf, expr.Sel)54		buf.WriteByte('[')55		if expr.Len != nil {

layoutStructFields

Using AI Code Generation

1import (2type Person struct {3}4func main() {5 p := Person{"Naveen", 50}6 fmt.Println(p)7}8{Naveen 50}

layoutStructFields

Using AI Code Generation

1import (2type Person struct {3}4func main() {5	p := Person{"John", 23}6	t := reflect.TypeOf(p)7	f, _ := t.FieldByName("Name")8	fmt.Println(f.Name)9	fmt.Println(f.Type)10	fmt.Println(f.Tag)11	fmt.Println(f.Offset)12	fmt.Println(f.Index)13	fmt.Println(f.Index[0])14}15import (16type Person struct {17}18func main() {19	p := Person{"John", 23}20	t := reflect.TypeOf(p)21	fmt.Println(t.NumMethod())22	for i := 0; i < t.NumMethod(); i++ {23		fmt.Println(t.Method(i).Name)24	}25}26import (27type Person struct {28}29func (p Person) SayHello() {30	fmt.Println("Hello")31}32func main() {33	p := Person{"John", 23}

layoutStructFields

Using AI Code Generation

1import (2func main() {3    compiler := reflect.ValueOf(&compiler{}).Elem().Interface().(Compiler)4    st := reflect.TypeOf(&struct {5    }{})6    compiler.layoutStructFields(st)7}8type Compiler interface {9    layoutStructFields(st reflect.Type)10}11type compiler struct {12}13func (c *compiler) layoutStructFields(st reflect.Type) {14    fields := st.Elem().NumField()15    for i := 0; i < fields; i++ {16        field := st.Elem().Field(i)17        fmt.Println(field.Name)18        fmt.Println(field.Type)19    }20}

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