How to use Labels method of types Package

Best Ginkgo code snippet using types.Labels

pointsto.go

Source: pointsto.go Github

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...156 if pointer.CanHaveDynamicTypes(T) {157 /​/​ Show concrete types for interface/​reflect.Value expression.158 if concs := pts.DynamicTypes(); concs.Len() > 0 {159 concs.Iterate(func(conc types.Type, pta interface{}) {160 labels := pta.(pointer.PointsToSet).Labels()161 sort.Sort(byPosAndString(labels)) /​/​ to ensure determinism162 ptrs = append(ptrs, pointerResult{conc, labels})163 })164 }165 } else {166 /​/​ Show labels for other expressions.167 labels := pts.Labels()168 sort.Sort(byPosAndString(labels)) /​/​ to ensure determinism169 ptrs = append(ptrs, pointerResult{T, labels})170 }171 sort.Sort(byTypeString(ptrs)) /​/​ to ensure determinism172 return ptrs, nil173}174type pointerResult struct {175 typ types.Type /​/​ type of the pointer (always concrete)176 labels []*pointer.Label /​/​ set of labels177}178type pointstoResult struct {179 qpos *queryPos180 typ types.Type /​/​ type of expression181 ptrs []pointerResult /​/​ pointer info (typ is concrete => len==1)182}183func (r *pointstoResult) PrintPlain(printf printfFunc) {184 if pointer.CanHaveDynamicTypes(r.typ) {185 /​/​ Show concrete types for interface, reflect.Type or186 /​/​ reflect.Value expression.187 if len(r.ptrs) > 0 {188 printf(r.qpos, "this %s may contain these dynamic types:", r.qpos.typeString(r.typ))189 for _, ptr := range r.ptrs {190 var obj types.Object191 if nt, ok := deref(ptr.typ).(*types.Named); ok {192 obj = nt.Obj()193 }194 if len(ptr.labels) > 0 {195 printf(obj, "\t%s, may point to:", r.qpos.typeString(ptr.typ))196 printLabels(printf, ptr.labels, "\t\t")197 } else {198 printf(obj, "\t%s", r.qpos.typeString(ptr.typ))199 }200 }201 } else {202 printf(r.qpos, "this %s cannot contain any dynamic types.", r.typ)203 }204 } else {205 /​/​ Show labels for other expressions.206 if ptr := r.ptrs[0]; len(ptr.labels) > 0 {207 printf(r.qpos, "this %s may point to these objects:",208 r.qpos.typeString(r.typ))209 printLabels(printf, ptr.labels, "\t")210 } else {211 printf(r.qpos, "this %s may not point to anything.",212 r.qpos.typeString(r.typ))213 }214 }215}216func (r *pointstoResult) JSON(fset *token.FileSet) []byte {217 var pts []serial.PointsTo218 for _, ptr := range r.ptrs {219 var namePos string220 if nt, ok := deref(ptr.typ).(*types.Named); ok {221 namePos = fset.Position(nt.Obj().Pos()).String()222 }223 var labels []serial.PointsToLabel224 for _, l := range ptr.labels {225 labels = append(labels, serial.PointsToLabel{226 Pos: fset.Position(l.Pos()).String(),227 Desc: l.String(),228 })229 }230 pts = append(pts, serial.PointsTo{231 Type: r.qpos.typeString(ptr.typ),232 NamePos: namePos,233 Labels: labels,234 })235 }236 return toJSON(pts)237}238type byTypeString []pointerResult239func (a byTypeString) Len() int { return len(a) }240func (a byTypeString) Less(i, j int) bool { return a[i].typ.String() < a[j].typ.String() }241func (a byTypeString) Swap(i, j int) { a[i], a[j] = a[j], a[i] }242type byPosAndString []*pointer.Label243func (a byPosAndString) Len() int { return len(a) }244func (a byPosAndString) Less(i, j int) bool {245 cmp := a[i].Pos() - a[j].Pos()246 return cmp < 0 || (cmp == 0 && a[i].String() < a[j].String())247}248func (a byPosAndString) Swap(i, j int) { a[i], a[j] = a[j], a[i] }249func printLabels(printf printfFunc, labels []*pointer.Label, prefix string) {250 /​/​ TODO(adonovan): due to context-sensitivity, many of these251 /​/​ labels may differ only by context, which isn't apparent.252 for _, label := range labels {253 printf(label, "%s%s", prefix, label)254 }255}...

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1import (2type T struct {3}4func main() {5 t := T{23, "skidoo"}6 s := reflect.ValueOf(&t).Elem()7 typeOfT := s.Type()8 for i := 0; i < s.NumField(); i++ {9 f := s.Field(i)10 fmt.Printf("%d: %s %s = %v11 typeOfT.Field(i).Name, f.Type(), f.Interface())12 }13}14import (15type T struct {16}17func main() {18 t := T{23, "skidoo"}19 s := reflect.ValueOf(&t).Elem()20 typeOfT := s.Type()21 for i := 0; i < s.NumField(); i++ {22 f := s.Field(i)23 fmt.Printf("%d: %s %s = %v24 typeOfT.Field(i).Name, f.Type(), f.Interface())25 }26}27import (28type T struct {29}30func main() {31 t := T{23, "skidoo"}32 s := reflect.ValueOf(&t).Elem()33 typeOfT := s.Type()34 for i := 0; i < s.NumField(); i++ {35 f := s.Field(i)36 fmt.Printf("%d: %s %s = %v37 typeOfT.Field(i).Name, f.Type(), f.Interface())38 }39 for i := 0; i < s.NumField(); i++ {40 f := s.Field(i)41 fmt.Printf("%d: %s %s = %v42 typeOfT.Field(i).Tag, f.Type(), f.Interface())43 }44}

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1import (2func main() {3 fmt.Println(s)4 fmt.Printf("%c %c5 fmt.Printf("%x %x6 fmt.Printf("%U %U7 fmt.Printf("%c %c8 fmt.Printf("%c %c9 fmt.Printf("%x %x10 fmt.Printf("%U %U11 fmt.Println("goodbye")

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1import (2type Person struct {3}4func main() {5 p := Person{Name: "John", Age: 32}6 t := reflect.TypeOf(p)7 field, _ := t.FieldByName("Name")8 fmt.Println(field.Tag)9}10import (11type Person struct {12}13func main() {14 p := Person{Name: "John", Age: 32}15 t := reflect.TypeOf(p)16 field, _ := t.FieldByName("Name")17 fmt.Println(field.Name)18}19import (20type Person struct {21}22func main() {23 p := Person{Name: "John", Age: 32}24 t := reflect.TypeOf(p)25 field, _ := t.FieldByName("Name")26 fmt.Println(field.Type)27}28import (29type Person struct {30}31func main() {32 p := Person{Name: "John", Age: 32}33 t := reflect.TypeOf(p)34 field, _ := t.FieldByName("Name")35 fmt.Println(field.Index)36}37import (38type Person struct {39}40func main() {41 p := Person{Name: "John", Age: 32}42 t := reflect.TypeOf(p)43 field, _ := t.FieldByName("Name")44 fmt.Println(field.Offset)45}46import (47type Person struct {

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1import (2type T struct {3}4func main() {5 t := T{23, "skidoo"}6 s := reflect.TypeOf(t)7 fmt.Println(s.NumField())8 for i := 0; i < s.NumField(); i++ {9 fmt.Printf("Field %d: %v10", i+1, s.Field(i).Name)11 fmt.Println(s.Field(i).Tag)12 }13}14import (15type T struct {16}17func main() {18 t := T{23, "skidoo"}19 s := reflect.TypeOf(t)20 fmt.Println(s.NumField())21 for i := 0; i < s.NumField(); i++ {22 fmt.Printf("Field %d: %v23", i+1, s.Field(i).Name)24 fmt.Println(s.Field(i).Tag)25 }26}27import (28type T struct {29}30func main() {31 t := T{23, "skidoo"}32 s := reflect.TypeOf(t)33 fmt.Println(s.NumField())34 for i := 0; i < s.NumField(); i++ {35 fmt.Printf("Field %d: %v36", i+1, s.Field(i).Name)37 fmt.Println(s.Field(i).Tag.Get("json"))38 }39}40import (41type T struct {

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1import (2type Person struct {3}4func main() {5 p := Person{"John", 20}6 t := reflect.TypeOf(p)7 field, _ := t.FieldByName("Name")8 fmt.Println(field.Name, field.Tag.Get("json"))9}

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1import (2type Student struct {3}4func main() {5 t := reflect.TypeOf(s)6 field, _ := t.FieldByName("Name")7 fmt.Println(field.Tag)8}92. Label() method10import (11type Student struct {12}13func main() {14 t := reflect.TypeOf(s)15 field, _ := t.FieldByName("Name")16 fmt.Println(field.Tag.Get("json"))17}183. SetLabel() method19import (20type Student struct {21}22func main() {23 t := reflect.TypeOf(s)24 field, _ := t.FieldByName("Name")25 fmt.Println(field.Tag.Get("json"))26 fmt.Println(field.Tag.Get("json"))27}

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1import (2type Student struct {3}4func main() {5 sType := reflect.TypeOf(s)6 nameLabel := sType.Field(0).Name7 ageLabel := sType.Field(1).Name8 fmt.Println(nameLabel, ageLabel)9}10import (11type Student struct {12}13func main() {14 sType := reflect.TypeOf(s)15 nameLabel := sType.Field(0).Tag.Get("label")16 ageLabel := sType.Field(1).Tag.Get("label")17 fmt.Println(nameLabel, ageLabel)18}19import (20type Student struct {21}22func main() {23 sType := reflect.TypeOf(s)24 nameLabel := sType.Field(0).Tag.Get("label")25 ageLabel := sType.Field(1).Tag.Get("label")26 fmt.Println(nameLabel, ageLabel)27}28import (29type Student struct {30}31func main() {32 sType := reflect.TypeOf(s)33 nameLabel := sType.Field(0).Tag.Get("label")34 ageLabel := sType.Field(1).Tag.Get("label")

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1import (2func main() {3 fmt.Println("Labels method of types class")4 fmt.Println("------------------------------")5 fmt.Println("The Labels method returns a list of labels defined for the type.")6 fmt.Println("------------------------------")7 fmt.Println("Example 1")8 fmt.Println("------------------------------")9 fmt.Println("The Labels method returns a list of labels defined for the type.")10 fmt.Println("The Labels method is used to get the list of labels defined for the type.")11 fmt.Println("------------------------------")12 fmt.Println("Example 2")13 fmt.Println("------------------------------")14 fmt.Println("The Labels method returns a list of labels defined for the type.")15 fmt.Println("The Labels method is used to get the list of labels defined for the type.")16}17import (18func main() {19 fmt.Println("Labels method of types class")20 fmt.Println("------------------------------")21 fmt.Println("The Labels method returns a list of labels defined for the type.")22 fmt.Println("------------------------------")23 fmt.Println("Example 1")24 fmt.Println("------------------------------")25 fmt.Println("The Labels method returns a list of labels defined for the type.")26 fmt.Println("The Labels method is used to get the list of labels defined for the type.")27 fmt.Println("------------------------------")28 fmt.Println("Example 2")29 fmt.Println("------------------------------")30 fmt.Println("The Labels method returns a list of labels defined for the type.")31 fmt.Println("The Labels method is used to get the list of labels defined for the type.")32 fmt.Println("------------------------------")33 fmt.Println("The Labels method returns a list of labels defined for the type.")34 fmt.Println("The Labels method is used to get the list of labels defined for the type.")35}

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