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How to use IsZero method of types Package

Best Ginkgo code snippet using types.IsZero

required.go

Source:required.go

...18	"time"19	"go.thethings.network/lorawan-stack/pkg/errors"20	"go.thethings.network/lorawan-stack/pkg/types"21)22// IsZeroer is an interface, which reports whether it represents a zero value.23type IsZeroer interface {24	IsZero() bool25}26var isZeroerType = reflect.TypeOf((*IsZeroer)(nil)).Elem()27// isZeroValue is like isZero, but acts on values of reflect.Value type.28func isZeroValue(v reflect.Value) bool {29	iv := reflect.Indirect(v)30	if !iv.IsValid() {31		return true32	}33	if v.Type().Implements(isZeroerType) {34		return v.Interface().(IsZeroer).IsZero()35	}36	if iv.Type().Implements(isZeroerType) {37		return iv.Interface().(IsZeroer).IsZero()38	}39	v = iv40	switch v.Kind() {41	case reflect.Array:42		for i := 0; i < v.Len(); i++ {43			if !isZero(v.Index(i)) {44				return false45			}46		}47		return true48	case reflect.Map, reflect.Slice, reflect.String:49		return v.Len() == 050	case reflect.Bool:51		return !v.Bool()52	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:53		return v.Int() == 054	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:55		return v.Uint() == 056	case reflect.Float32, reflect.Float64:57		return v.Float() == 058	case reflect.Complex64, reflect.Complex128:59		return v.Complex() == 060	case reflect.Chan, reflect.Func, reflect.Interface:61		return v.IsNil()62	case reflect.UnsafePointer:63		return v.Pointer() == 064	case reflect.Struct:65		for i := 0; i < v.NumField(); i++ {66			if !isZeroValue(v.Field(i)) {67				return false68			}69		}70		return true71	}72	return v.Interface() == reflect.Zero(v.Type()).Interface()73}74// isZero reports whether the value is the zero of its type.75func isZero(v interface{}) bool {76	if v == nil {77		return true78	}79	switch v := v.(type) {80	case nil:81		return true82	case bool:83		return !v84	case int:85		return v == 086	case int64:87		return v == 088	case int32:89		return v == 090	case int16:91		return v == 092	case int8:93		return v == 094	case uint:95		return v == 096	case uint64:97		return v == 098	case uint32:99		return v == 0100	case uint16:101		return v == 0102	case uint8:103		return v == 0104	case float64:105		return v == 0106	case float32:107		return v == 0108	case string:109		return v == ""110	case []bool:111		return len(v) == 0112	case []string:113		return len(v) == 0114	case []uint:115		return len(v) == 0116	case []uint64:117		return len(v) == 0118	case []uint32:119		return len(v) == 0120	case []uint16:121		return len(v) == 0122	case []uint8:123		return len(v) == 0124	case []int:125		return len(v) == 0126	case []int64:127		return len(v) == 0128	case []int32:129		return len(v) == 0130	case []int16:131		return len(v) == 0132	case []int8:133		return len(v) == 0134	case []float64:135		return len(v) == 0136	case []float32:137		return len(v) == 0138	case map[string]interface{}:139		return len(v) == 0140	case map[string]string:141		return len(v) == 0142	case *time.Time:143		return v == nil || v.IsZero()144	case time.Time:145		return v.IsZero()146	case *types.AES128Key:147		return v == nil || v.IsZero()148	case types.AES128Key:149		return v.IsZero()150	case *types.EUI64:151		return v == nil || v.IsZero()152	case types.EUI64:153		return v.IsZero()154	case *types.NetID:155		return v == nil || v.IsZero()156	case types.NetID:157		return v.IsZero()158	case *types.DevAddr:159		return v == nil || v.IsZero()160	case types.DevAddr:161		return v.IsZero()162	case *types.DevNonce:163		return v == nil || v.IsZero()164	case types.DevNonce:165		return v.IsZero()166	case *types.JoinNonce:167		return v == nil || v.IsZero()168	case types.JoinNonce:169		return v.IsZero()170	}171	return isZeroValue(reflect.ValueOf(v))172}173var errFieldSet = errors.DefineInvalidArgument("field_set", "field is set")174// Empty returns error if v is set.175// It is meant to be used as the first validator function passed as argument to Field.176// It uses IsZero, if v implements IsZeroer interface.177func Empty(v interface{}) error {178	if !isZero(v) {179		return errFieldSet180	}181	return nil182}183// errZeroValue is a flag value indicating a value is not required. If a value is not set,184// requirements on its value will be ignored.185var errZeroValue = stdliberr.New("Value not set")186// NotRequired returns an error, used internally in Field, if v is zero.187// It is meant to be used as the first validator function passed as argument to Field.188// It uses IsZero, if v implements IsZeroer interface.189func NotRequired(v interface{}) error {190	if isZero(v) {191		return errZeroValue192	}193	return nil194}195// Required returns error if v is empty.196// It is meant to be used as the first validator function passed as argument to Field.197// It uses IsZero, if v implements IsZeroer interface.198func Required(v interface{}) error {199	if isZero(v) {200		return errRequired201	}202	return nil203}...

required_test.go

Source:required_test.go

...26type isZeroer struct {27	isZero bool28}29var izCalled int30func (iz isZeroer) IsZero() bool {31	izCalled++32	return iz.isZero33}34type stringType string35type boolType bool36type int64Type int6437type uint64Type uint6438type float64Type float6439type structType struct {40	field bool41}42var isZeroCases = []struct {43	v      interface{}44	isZero bool45}{46	{nil, true},47	{(interface{})(nil), true},48	{false, true},49	{int(0), true},50	{int64(0), true},51	{int32(0), true},52	{int16(0), true},53	{int8(0), true},54	{uint(0), true},55	{uint64(0), true},56	{uint32(0), true},57	{uint16(0), true},58	{uint8(0), true},59	{float64(0), true},60	{float32(0), true},61	{float32(0), true},62	{"", true},63	{[]bool{}, true},64	{[]int{}, true},65	{[]int64{}, true},66	{[]int32{}, true},67	{[]int16{}, true},68	{[]int8{}, true},69	{[]uint{}, true},70	{[]uint64{}, true},71	{[]uint32{}, true},72	{[]uint16{}, true},73	{[]uint8{}, true},74	{[]float64{}, true},75	{[]float32{}, true},76	{[]float32{}, true},77	{[]string{}, true},78	{(*time.Time)(nil), true},79	{time.Time{}, true},80	{&time.Time{}, true},81	{map[string]interface{}{}, true},82	{map[string]interface{}{"foo": "bar"}, false},83	{map[string]string{}, true},84	{map[string]string{"foo": "bar"}, false},85	{types.AES128Key{}, true},86	{types.EUI64{}, true},87	{types.NetID{}, true},88	{types.DevAddr{}, true},89	{types.DevNonce{}, true},90	{types.JoinNonce{}, true},91	{(*types.AES128Key)(nil), true},92	{(*types.EUI64)(nil), true},93	{(*types.NetID)(nil), true},94	{(*types.DevAddr)(nil), true},95	{(*types.DevNonce)(nil), true},96	{(*types.JoinNonce)(nil), true},97	{isZeroer{isZero: false}, false},98	{isZeroer{isZero: true}, true},99	{(*isZeroer)(nil), true},100	{&isZeroer{isZero: false}, false},101	{&isZeroer{isZero: true}, true},102	{stringType(""), true},103	{stringType("foo"), false},104	{boolType(false), true},105	{boolType(true), false},106	{int64Type(0), true},107	{int64Type(42), false},108	{uint64Type(0), true},109	{uint64Type(42), false},110	{float64Type(0), true},111	{float64Type(42), false},112	{structType{true}, false},113	{structType{false}, true},114	{unsafe.Pointer(nil), true},115	{unsafe.Pointer(&([]byte{42})[0]), false},116}117func TestIsZero(t *testing.T) {118	for i, tc := range isZeroCases {119		t.Run(fmt.Sprintf("%d %T(%v)", i, tc.v, tc.v), func(t *testing.T) {120			assertions.New(t).So(isZero(tc.v), should.Equal, tc.isZero)121		})122	}123	assertions.New(t).So(izCalled, should.Equal, 4)124}125func TestRequired(t *testing.T) {126	a := assertions.New(t)127	a.So(Field("", Required), should.NotBeNil)128	a.So(Field("f", Required), should.BeNil)129	a.So(Field("", NotRequired), should.BeNil)130	a.So(Field("f", NotRequired), should.BeNil)131}132func BenchmarkIsZero(b *testing.B) {133	for i, tc := range isZeroCases {134		b.Run(strconv.Itoa(i), func(b *testing.B) {135			for j := 0; j < b.N; j++ {136				isZero(tc.v)137			}138		})139	}140}141func BenchmarkIsZeroValue(b *testing.B) {142	for i, tc := range isZeroCases {143		b.Run(strconv.Itoa(i), func(b *testing.B) {144			for j := 0; j < b.N; j++ {145				isZeroValue(reflect.ValueOf(tc.v))146			}147		})148	}149}...

IsZero

Using AI Code Generation

1import (2func main() {3 fmt.Println(t.IsZero())4 t = time.Now()5 fmt.Println(t.IsZero())6}

IsZero

Using AI Code Generation

1import (2func main() {3	fmt.Println(i, f, b, s, t)4	fmt.Println(i == 0, f == 0, b == false, s == "", t.IsZero())5}6import (7func main() {8	fmt.Println(t.IsZero())9	fmt.Println(t)10}11import (12func main() {13	t := time.Now()14	fmt.Println(t)15}

IsZero

Using AI Code Generation

1import (2func main() {3	fmt.Println("IsZero:", t.IsZero())4	t = time.Now()5	fmt.Println("IsZero:", t.IsZero())6}7import (8func main() {9	fmt.Println("IsZero:", t.IsZero())10	t = time.Now()11	fmt.Println("IsZero:", t.IsZero())12}13import (14func main() {15	fmt.Println("IsZero:", t.IsZero())16	t = time.Now()17	fmt.Println("IsZero:", t.IsZero())18}19import (20func main() {21	fmt.Println("IsZero:", t.IsZero())22	t = time.Now()23	fmt.Println("IsZero:", t.IsZero())24}25import (26func main() {27	fmt.Println("IsZero:", t.IsZero())28	t = time.Now()29	fmt.Println("IsZero:", t.IsZero())30}31import (32func main() {33	fmt.Println("IsZero:", t.IsZero())34	t = time.Now()35	fmt.Println("IsZero:", t.IsZero())36}37import (38func main() {39	fmt.Println("IsZero:", t.IsZero())40	t = time.Now()

IsZero

Using AI Code Generation

1import (2func main() {3	fmt.Println(t.IsZero())4	t = time.Now()5	fmt.Println(t.IsZero())6}7Time.Unix() Method8func (t Time) Unix() int649import (10func main() {11	fmt.Println(t.Unix())12	t = time.Now()13	fmt.Println(t.Unix())14}15Time.UnixNano() Method16func (t Time) UnixNano() int64

IsZero

Using AI Code Generation

1import (2func main() {3    var g struct{}4    var k func()5    fmt.Println(reflect.ValueOf(a).IsZero())6    fmt.Println(reflect.ValueOf(b).IsZero())7    fmt.Println(reflect.ValueOf(c).IsZero())8    fmt.Println(reflect.ValueOf(d).IsZero())9    fmt.Println(reflect.ValueOf(e).IsZero())10    fmt.Println(reflect.ValueOf(f).IsZero())11    fmt.Println(reflect.ValueOf(g).IsZero())12    fmt.Println(reflect.ValueOf(h).IsZero())13    fmt.Println(reflect.ValueOf(i).IsZero())14    fmt.Println(reflect.ValueOf(j).IsZero())15    fmt.Println(reflect.V

IsZero

Using AI Code Generation

1import (2func main() {3	fmt.Println("Zero value of int is", reflect.ValueOf(i).IsZero())4	fmt.Println("Zero value of float64 is", reflect.ValueOf(f).IsZero())5	fmt.Println("Zero value of bool is", reflect.ValueOf(b).IsZero())6	fmt.Println("Zero value of string is", reflect.ValueOf(s).IsZero())7}

IsZero

Using AI Code Generation

1import (2func main() {3	pkgs, err := packages.Load(&packages.Config{4	}, ".")5	if err != nil {6		log.Fatal(err)7	}8	if packages.PrintErrors(pkgs) > 0 {9		os.Exit(1)10	}11	for _, p := range pkgs {12		if p.Name == "main" {13		}14	}15	if pkg == nil {16		log.Fatalf("could not find package main")17	}18	for _, p := range pkgs {19		if p.TypesInfo != nil {20		}21	}22	if info == nil {23		log.Fatalf("could not find types.Info for package %s", pkg.ID)24	}25	for _, p := range pkgs {26		if p.Types != nil {27		}28	}29	if typesPkg == nil {30		log.Fatalf("could not find types.Package for package %s", pkg.ID)31	}32	scope := typesPkg.Scope()33	if scope == nil {34		log.Fatalf("could not find types.Scope for package %s", pkg.ID)35	}36	for _, name := range scope.Names() {37		obj := scope.Lookup(name)38		if obj == nil {39		}40		if obj.Exported() {41		}42		if obj.Type() == nil {43		}44		if _, ok := obj.Type().Underlying().(*types.Struct); !ok {45		}46		structs = append(structs, obj.Type())47	}

IsZero

Using AI Code Generation

1import (2func main() {3	fmt.Println("IsZero:", reflect.ValueOf(i).IsZero())4	fmt.Println("IsZero:", reflect.ValueOf(s).IsZero())5	fmt.Println("IsZero:", reflect.ValueOf(sl).IsZero())6}7GoLang | reflect.Value Method Set()8GoLang | reflect.Value Method SetString()

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