Merge pull request #523 from go-playground/fixes

Fixes

Makefile

@@ -1,11 +1,13 @@
 GOCMD=go
 
 linters-install:
-	$(GOCMD) get -u github.com/alecthomas/gometalinter
+	@golangci-lint --version >/dev/null 2>&1 || { \
-	gometalinter --install
+		echo "installing linting tools..."; \
+		curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s v1.19.1; \
+	}
 
 lint: linters-install
-	gometalinter --vendor --disable-all --enable=vet --enable=vetshadow --enable=golint --enable=maligned --enable=megacheck --enable=ineffassign --enable=misspell --enable=errcheck --enable=goconst ./...
+	golangci-lint run
 
 test:
 	$(GOCMD) test -cover -race ./...

baked_in.go

@@ -1301,26 +1301,35 @@ func isDefault(fl FieldLevel) bool {
 
 // HasValue is the validation function for validating if the current field's value is not the default static value.
 func hasValue(fl FieldLevel) bool {
-	return requireCheckFieldKind(fl, "")
+	field := fl.Field()
+	switch field.Kind() {
+	case reflect.Slice, reflect.Map, reflect.Ptr, reflect.Interface, reflect.Chan, reflect.Func:
+		return !field.IsNil()
+	default:
+		if fl.(*validate).fldIsPointer && field.Interface() != nil {
+			return true
+		}
+		return field.IsValid() && field.Interface() != reflect.Zero(field.Type()).Interface()
+	}
 }
 
 // requireCheckField is a func for check field kind
-func requireCheckFieldKind(fl FieldLevel, param string) bool {
+func requireCheckFieldKind(fl FieldLevel, param string, defaultNotFoundValue bool) bool {
 	field := fl.Field()
+	var ok bool
+	kind := field.Kind()
 	if len(param) > 0 {
-		if fl.Parent().Kind() == reflect.Ptr {
+		field, kind, ok = fl.GetStructFieldOKAdvanced(fl.Parent(), param)
-			field = fl.Parent().Elem().FieldByName(param)
+		if !ok {
-		} else {
+			return defaultNotFoundValue
-			field = fl.Parent().FieldByName(param)
 		}
 	}
-	switch field.Kind() {
+	switch kind {
+	case reflect.Invalid:
+		return defaultNotFoundValue
 	case reflect.Slice, reflect.Map, reflect.Ptr, reflect.Interface, reflect.Chan, reflect.Func:
 		return !field.IsNil()
 	default:
-		if fl.(*validate).fldIsPointer && field.Interface() != nil {
-			return true
-		}
 		return field.IsValid() && field.Interface() != reflect.Zero(field.Type()).Interface()
 	}
 }
@@ -1328,76 +1337,49 @@ func requireCheckFieldKind(fl FieldLevel, param string) bool {
 // RequiredWith is the validation function
 // The field under validation must be present and not empty only if any of the other specified fields are present.
 func requiredWith(fl FieldLevel) bool {
-
 	params := parseOneOfParam2(fl.Param())
 	for _, param := range params {
-
+		if requireCheckFieldKind(fl, param, false) {
-		if requireCheckFieldKind(fl, param) {
+			return hasValue(fl)
-			return requireCheckFieldKind(fl, "")
 		}
 	}
-
 	return true
 }
 
 // RequiredWithAll is the validation function
 // The field under validation must be present and not empty only if all of the other specified fields are present.
 func requiredWithAll(fl FieldLevel) bool {
-
-	isValidateCurrentField := true
 	params := parseOneOfParam2(fl.Param())
 	for _, param := range params {
-
+		if !requireCheckFieldKind(fl, param, false) {
-		if !requireCheckFieldKind(fl, param) {
+			return true
-			isValidateCurrentField = false
 		}
 	}
-
+	return hasValue(fl)
-	if isValidateCurrentField {
-		return requireCheckFieldKind(fl, "")
-	}
-
-	return true
 }
 
 // RequiredWithout is the validation function
 // The field under validation must be present and not empty only when any of the other specified fields are not present.
 func requiredWithout(fl FieldLevel) bool {
-
-	isValidateCurrentField := false
 	params := parseOneOfParam2(fl.Param())
 	for _, param := range params {
-
+		if !requireCheckFieldKind(fl, param, true) {
-		if requireCheckFieldKind(fl, param) {
+			return hasValue(fl)
-			isValidateCurrentField = true
 		}
 	}
-
-	if !isValidateCurrentField {
-		return requireCheckFieldKind(fl, "")
-	}
-
 	return true
 }
 
 // RequiredWithoutAll is the validation function
 // The field under validation must be present and not empty only when all of the other specified fields are not present.
 func requiredWithoutAll(fl FieldLevel) bool {
-
-	isValidateCurrentField := true
 	params := parseOneOfParam2(fl.Param())
 	for _, param := range params {
-
+		if requireCheckFieldKind(fl, param, true) {
-		if requireCheckFieldKind(fl, param) {
+			return true
-			isValidateCurrentField = false
 		}
 	}
-
+	return hasValue(fl)
-	if isValidateCurrentField {
-		return requireCheckFieldKind(fl, "")
-	}
-
-	return true
 }
 
 // IsGteField is the validation function for validating if the current field's value is greater than or equal to the field specified by the param's value.

benchmarks_test.go

@@ -8,236 +8,200 @@ import (
 )
 
 func BenchmarkFieldSuccess(b *testing.B) {
-
 	validate := New()
-
 	s := "1"
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Var(&s, "len=1")
+		_ = validate.Var(&s, "len=1")
 	}
 }
 
 func BenchmarkFieldSuccessParallel(b *testing.B) {
-
 	validate := New()
-
 	s := "1"
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(&s, "len=1")
+			_ = validate.Var(&s, "len=1")
 		}
 	})
 }
 
 func BenchmarkFieldFailure(b *testing.B) {
-
 	validate := New()
-
 	s := "12"
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Var(&s, "len=1")
+		_ = validate.Var(&s, "len=1")
 	}
 }
 
 func BenchmarkFieldFailureParallel(b *testing.B) {
-
 	validate := New()
-
 	s := "12"
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(&s, "len=1")
+			_ = validate.Var(&s, "len=1")
 		}
 	})
 }
 
 func BenchmarkFieldArrayDiveSuccess(b *testing.B) {
-
 	validate := New()
-
 	m := []string{"val1", "val2", "val3"}
 
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		validate.Var(m, "required,dive,required")
+		_ = validate.Var(m, "required,dive,required")
 	}
 }
 
 func BenchmarkFieldArrayDiveSuccessParallel(b *testing.B) {
-
 	validate := New()
-
 	m := []string{"val1", "val2", "val3"}
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(m, "required,dive,required")
+			_ = validate.Var(m, "required,dive,required")
 		}
 	})
 }
 
 func BenchmarkFieldArrayDiveFailure(b *testing.B) {
-
 	validate := New()
-
 	m := []string{"val1", "", "val3"}
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Var(m, "required,dive,required")
+		_ = validate.Var(m, "required,dive,required")
 	}
 }
 
 func BenchmarkFieldArrayDiveFailureParallel(b *testing.B) {
-
 	validate := New()
-
 	m := []string{"val1", "", "val3"}
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(m, "required,dive,required")
+			_ = validate.Var(m, "required,dive,required")
 		}
 	})
 }
 
 func BenchmarkFieldMapDiveSuccess(b *testing.B) {
-
 	validate := New()
-
 	m := map[string]string{"val1": "val1", "val2": "val2", "val3": "val3"}
 
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		validate.Var(m, "required,dive,required")
+		_ = validate.Var(m, "required,dive,required")
 	}
 }
 
 func BenchmarkFieldMapDiveSuccessParallel(b *testing.B) {
-
 	validate := New()
-
 	m := map[string]string{"val1": "val1", "val2": "val2", "val3": "val3"}
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(m, "required,dive,required")
+			_ = validate.Var(m, "required,dive,required")
 		}
 	})
 }
 
 func BenchmarkFieldMapDiveFailure(b *testing.B) {
-
 	validate := New()
-
 	m := map[string]string{"": "", "val3": "val3"}
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Var(m, "required,dive,required")
+		_ = validate.Var(m, "required,dive,required")
 	}
 }
 
 func BenchmarkFieldMapDiveFailureParallel(b *testing.B) {
-
 	validate := New()
-
 	m := map[string]string{"": "", "val3": "val3"}
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(m, "required,dive,required")
+			_ = validate.Var(m, "required,dive,required")
 		}
 	})
 }
 
 func BenchmarkFieldMapDiveWithKeysSuccess(b *testing.B) {
-
 	validate := New()
-
 	m := map[string]string{"val1": "val1", "val2": "val2", "val3": "val3"}
 
 	b.ResetTimer()
 
 	for n := 0; n < b.N; n++ {
-		validate.Var(m, "required,dive,keys,required,endkeys,required")
+		_ = validate.Var(m, "required,dive,keys,required,endkeys,required")
 	}
 }
 
 func BenchmarkFieldMapDiveWithKeysSuccessParallel(b *testing.B) {
-
 	validate := New()
-
 	m := map[string]string{"val1": "val1", "val2": "val2", "val3": "val3"}
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(m, "required,dive,keys,required,endkeys,required")
+			_ = validate.Var(m, "required,dive,keys,required,endkeys,required")
 		}
 	})
 }
 
 func BenchmarkFieldMapDiveWithKeysFailure(b *testing.B) {
-
 	validate := New()
-
 	m := map[string]string{"": "", "val3": "val3"}
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Var(m, "required,dive,keys,required,endkeys,required")
+		_ = validate.Var(m, "required,dive,keys,required,endkeys,required")
 	}
 }
 
 func BenchmarkFieldMapDiveWithKeysFailureParallel(b *testing.B) {
-
 	validate := New()
-
 	m := map[string]string{"": "", "val3": "val3"}
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(m, "required,dive,keys,required,endkeys,required")
+			_ = validate.Var(m, "required,dive,keys,required,endkeys,required")
 		}
 	})
 }
 
 func BenchmarkFieldCustomTypeSuccess(b *testing.B) {
-
 	validate := New()
 	validate.RegisterCustomTypeFunc(ValidateValuerType, (*sql.Valuer)(nil), valuer{})
-
 	val := valuer{
 		Name: "1",
 	}
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Var(val, "len=1")
+		_ = validate.Var(val, "len=1")
 	}
 }
 
 func BenchmarkFieldCustomTypeSuccessParallel(b *testing.B) {
-
 	validate := New()
 	validate.RegisterCustomTypeFunc(ValidateValuerType, (*sql.Valuer)(nil), valuer{})
-
 	val := valuer{
 		Name: "1",
 	}
@@ -245,93 +209,80 @@ func BenchmarkFieldCustomTypeSuccessParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(val, "len=1")
+			_ = validate.Var(val, "len=1")
 		}
 	})
 }
 
 func BenchmarkFieldCustomTypeFailure(b *testing.B) {
-
 	validate := New()
 	validate.RegisterCustomTypeFunc(ValidateValuerType, (*sql.Valuer)(nil), valuer{})
-
 	val := valuer{}
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Var(val, "len=1")
+		_ = validate.Var(val, "len=1")
 	}
 }
 
 func BenchmarkFieldCustomTypeFailureParallel(b *testing.B) {
-
 	validate := New()
 	validate.RegisterCustomTypeFunc(ValidateValuerType, (*sql.Valuer)(nil), valuer{})
-
 	val := valuer{}
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(val, "len=1")
+			_ = validate.Var(val, "len=1")
 		}
 	})
 }
 
 func BenchmarkFieldOrTagSuccess(b *testing.B) {
-
 	validate := New()
-
 	s := "rgba(0,0,0,1)"
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Var(s, "rgb|rgba")
+		_ = validate.Var(s, "rgb|rgba")
 	}
 }
 
 func BenchmarkFieldOrTagSuccessParallel(b *testing.B) {
-
 	validate := New()
-
 	s := "rgba(0,0,0,1)"
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(s, "rgb|rgba")
+			_ = validate.Var(s, "rgb|rgba")
 		}
 	})
 }
 
 func BenchmarkFieldOrTagFailure(b *testing.B) {
-
 	validate := New()
-
 	s := "#000"
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Var(s, "rgb|rgba")
+		_ = validate.Var(s, "rgb|rgba")
 	}
 }
 
 func BenchmarkFieldOrTagFailureParallel(b *testing.B) {
-
 	validate := New()
-
 	s := "#000"
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Var(s, "rgb|rgba")
+			_ = validate.Var(s, "rgb|rgba")
 		}
 	})
 }
 
 func BenchmarkStructLevelValidationSuccess(b *testing.B) {
-
 	validate := New()
 	validate.RegisterStructValidation(StructValidationTestStructSuccess, TestStruct{})
 
@@ -341,12 +292,11 @@ func BenchmarkStructLevelValidationSuccess(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(tst)
+		_ = validate.Struct(tst)
 	}
 }
 
 func BenchmarkStructLevelValidationSuccessParallel(b *testing.B) {
-
 	validate := New()
 	validate.RegisterStructValidation(StructValidationTestStructSuccess, TestStruct{})
 
@@ -357,13 +307,12 @@ func BenchmarkStructLevelValidationSuccessParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(tst)
+			_ = validate.Struct(tst)
 		}
 	})
 }
 
 func BenchmarkStructLevelValidationFailure(b *testing.B) {
-
 	validate := New()
 	validate.RegisterStructValidation(StructValidationTestStruct, TestStruct{})
 
@@ -373,12 +322,11 @@ func BenchmarkStructLevelValidationFailure(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(tst)
+		_ = validate.Struct(tst)
 	}
 }
 
 func BenchmarkStructLevelValidationFailureParallel(b *testing.B) {
-
 	validate := New()
 	validate.RegisterStructValidation(StructValidationTestStruct, TestStruct{})
 
@@ -389,13 +337,12 @@ func BenchmarkStructLevelValidationFailureParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(tst)
+			_ = validate.Struct(tst)
 		}
 	})
 }
 
 func BenchmarkStructSimpleCustomTypeSuccess(b *testing.B) {
-
 	validate := New()
 	validate.RegisterCustomTypeFunc(ValidateValuerType, (*sql.Valuer)(nil), valuer{})
 
@@ -412,15 +359,13 @@ func BenchmarkStructSimpleCustomTypeSuccess(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(validFoo)
+		_ = validate.Struct(validFoo)
 	}
 }
 
 func BenchmarkStructSimpleCustomTypeSuccessParallel(b *testing.B) {
-
 	validate := New()
 	validate.RegisterCustomTypeFunc(ValidateValuerType, (*sql.Valuer)(nil), valuer{})
-
 	val := valuer{
 		Name: "1",
 	}
@@ -429,19 +374,17 @@ func BenchmarkStructSimpleCustomTypeSuccessParallel(b *testing.B) {
 		Valuer   valuer `validate:"len=1"`
 		IntValue int    `validate:"min=5,max=10"`
 	}
-
 	validFoo := &Foo{Valuer: val, IntValue: 7}
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(validFoo)
+			_ = validate.Struct(validFoo)
 		}
 	})
 }
 
 func BenchmarkStructSimpleCustomTypeFailure(b *testing.B) {
-
 	validate := New()
 	validate.RegisterCustomTypeFunc(ValidateValuerType, (*sql.Valuer)(nil), valuer{})
 
@@ -451,17 +394,15 @@ func BenchmarkStructSimpleCustomTypeFailure(b *testing.B) {
 		Valuer   valuer `validate:"len=1"`
 		IntValue int    `validate:"min=5,max=10"`
 	}
-
 	validFoo := &Foo{Valuer: val, IntValue: 3}
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(validFoo)
+		_ = validate.Struct(validFoo)
 	}
 }
 
 func BenchmarkStructSimpleCustomTypeFailureParallel(b *testing.B) {
-
 	validate := New()
 	validate.RegisterCustomTypeFunc(ValidateValuerType, (*sql.Valuer)(nil), valuer{})
 
@@ -471,19 +412,17 @@ func BenchmarkStructSimpleCustomTypeFailureParallel(b *testing.B) {
 		Valuer   valuer `validate:"len=1"`
 		IntValue int    `validate:"min=5,max=10"`
 	}
-
 	validFoo := &Foo{Valuer: val, IntValue: 3}
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(validate.Struct(validFoo))
+			_ = validate.Struct(validate.Struct(validFoo))
 		}
 	})
 }
 
 func BenchmarkStructFilteredSuccess(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -494,21 +433,18 @@ func BenchmarkStructFilteredSuccess(b *testing.B) {
 	test := &Test{
 		Name: "Joey Bloggs",
 	}
-
 	byts := []byte("Name")
-
 	fn := func(ns []byte) bool {
 		return !bytes.HasSuffix(ns, byts)
 	}
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.StructFiltered(test, fn)
+		_ = validate.StructFiltered(test, fn)
 	}
 }
 
 func BenchmarkStructFilteredSuccessParallel(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -519,9 +455,7 @@ func BenchmarkStructFilteredSuccessParallel(b *testing.B) {
 	test := &Test{
 		Name: "Joey Bloggs",
 	}
-
 	byts := []byte("Name")
-
 	fn := func(ns []byte) bool {
 		return !bytes.HasSuffix(ns, byts)
 	}
@@ -529,13 +463,12 @@ func BenchmarkStructFilteredSuccessParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.StructFiltered(test, fn)
+			_ = validate.StructFiltered(test, fn)
 		}
 	})
 }
 
 func BenchmarkStructFilteredFailure(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -555,12 +488,11 @@ func BenchmarkStructFilteredFailure(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.StructFiltered(test, fn)
+		_ = validate.StructFiltered(test, fn)
 	}
 }
 
 func BenchmarkStructFilteredFailureParallel(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -571,9 +503,7 @@ func BenchmarkStructFilteredFailureParallel(b *testing.B) {
 	test := &Test{
 		Name: "Joey Bloggs",
 	}
-
 	byts := []byte("NickName")
-
 	fn := func(ns []byte) bool {
 		return !bytes.HasSuffix(ns, byts)
 	}
@@ -581,13 +511,12 @@ func BenchmarkStructFilteredFailureParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.StructFiltered(test, fn)
+			_ = validate.StructFiltered(test, fn)
 		}
 	})
 }
 
 func BenchmarkStructPartialSuccess(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -601,12 +530,11 @@ func BenchmarkStructPartialSuccess(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.StructPartial(test, "Name")
+		_ = validate.StructPartial(test, "Name")
 	}
 }
 
 func BenchmarkStructPartialSuccessParallel(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -621,13 +549,12 @@ func BenchmarkStructPartialSuccessParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.StructPartial(test, "Name")
+			_ = validate.StructPartial(test, "Name")
 		}
 	})
 }
 
 func BenchmarkStructPartialFailure(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -641,12 +568,11 @@ func BenchmarkStructPartialFailure(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.StructPartial(test, "NickName")
+		_ = validate.StructPartial(test, "NickName")
 	}
 }
 
 func BenchmarkStructPartialFailureParallel(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -661,13 +587,12 @@ func BenchmarkStructPartialFailureParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.StructPartial(test, "NickName")
+			_ = validate.StructPartial(test, "NickName")
 		}
 	})
 }
 
 func BenchmarkStructExceptSuccess(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -681,12 +606,11 @@ func BenchmarkStructExceptSuccess(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.StructExcept(test, "Nickname")
+		_ = validate.StructExcept(test, "Nickname")
 	}
 }
 
 func BenchmarkStructExceptSuccessParallel(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -701,13 +625,12 @@ func BenchmarkStructExceptSuccessParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.StructExcept(test, "NickName")
+			_ = validate.StructExcept(test, "NickName")
 		}
 	})
 }
 
 func BenchmarkStructExceptFailure(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -721,12 +644,11 @@ func BenchmarkStructExceptFailure(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.StructExcept(test, "Name")
+		_ = validate.StructExcept(test, "Name")
 	}
 }
 
 func BenchmarkStructExceptFailureParallel(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -741,13 +663,12 @@ func BenchmarkStructExceptFailureParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.StructExcept(test, "Name")
+			_ = validate.StructExcept(test, "Name")
 		}
 	})
 }
 
 func BenchmarkStructSimpleCrossFieldSuccess(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -757,7 +678,6 @@ func BenchmarkStructSimpleCrossFieldSuccess(b *testing.B) {
 
 	now := time.Now().UTC()
 	then := now.Add(time.Hour * 5)
-
 	test := &Test{
 		Start: now,
 		End:   then,
@@ -765,12 +685,11 @@ func BenchmarkStructSimpleCrossFieldSuccess(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(test)
+		_ = validate.Struct(test)
 	}
 }
 
 func BenchmarkStructSimpleCrossFieldSuccessParallel(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -780,7 +699,6 @@ func BenchmarkStructSimpleCrossFieldSuccessParallel(b *testing.B) {
 
 	now := time.Now().UTC()
 	then := now.Add(time.Hour * 5)
-
 	test := &Test{
 		Start: now,
 		End:   then,
@@ -789,13 +707,12 @@ func BenchmarkStructSimpleCrossFieldSuccessParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(test)
+			_ = validate.Struct(test)
 		}
 	})
 }
 
 func BenchmarkStructSimpleCrossFieldFailure(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -813,12 +730,11 @@ func BenchmarkStructSimpleCrossFieldFailure(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(test)
+		_ = validate.Struct(test)
 	}
 }
 
 func BenchmarkStructSimpleCrossFieldFailureParallel(b *testing.B) {
-
 	validate := New()
 
 	type Test struct {
@@ -828,7 +744,6 @@ func BenchmarkStructSimpleCrossFieldFailureParallel(b *testing.B) {
 
 	now := time.Now().UTC()
 	then := now.Add(time.Hour * -5)
-
 	test := &Test{
 		Start: now,
 		End:   then,
@@ -836,13 +751,12 @@ func BenchmarkStructSimpleCrossFieldFailureParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(test)
+			_ = validate.Struct(test)
 		}
 	})
 }
 
 func BenchmarkStructSimpleCrossStructCrossFieldSuccess(b *testing.B) {
-
 	validate := New()
 
 	type Inner struct {
@@ -855,11 +769,9 @@ func BenchmarkStructSimpleCrossStructCrossFieldSuccess(b *testing.B) {
 	}
 
 	now := time.Now().UTC()
-
 	inner := &Inner{
 		Start: now,
 	}
-
 	outer := &Outer{
 		Inner:     inner,
 		CreatedAt: now,
@@ -867,12 +779,11 @@ func BenchmarkStructSimpleCrossStructCrossFieldSuccess(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(outer)
+		_ = validate.Struct(outer)
 	}
 }
 
 func BenchmarkStructSimpleCrossStructCrossFieldSuccessParallel(b *testing.B) {
-
 	validate := New()
 
 	type Inner struct {
@@ -885,11 +796,9 @@ func BenchmarkStructSimpleCrossStructCrossFieldSuccessParallel(b *testing.B) {
 	}
 
 	now := time.Now().UTC()
-
 	inner := &Inner{
 		Start: now,
 	}
-
 	outer := &Outer{
 		Inner:     inner,
 		CreatedAt: now,
@@ -898,15 +807,13 @@ func BenchmarkStructSimpleCrossStructCrossFieldSuccessParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(outer)
+			_ = validate.Struct(outer)
 		}
 	})
 }
 
 func BenchmarkStructSimpleCrossStructCrossFieldFailure(b *testing.B) {
-
 	validate := New()
-
 	type Inner struct {
 		Start time.Time
 	}
@@ -930,12 +837,11 @@ func BenchmarkStructSimpleCrossStructCrossFieldFailure(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(outer)
+		_ = validate.Struct(outer)
 	}
 }
 
 func BenchmarkStructSimpleCrossStructCrossFieldFailureParallel(b *testing.B) {
-
 	validate := New()
 
 	type Inner struct {
@@ -962,15 +868,13 @@ func BenchmarkStructSimpleCrossStructCrossFieldFailureParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(outer)
+			_ = validate.Struct(outer)
 		}
 	})
 }
 
 func BenchmarkStructSimpleSuccess(b *testing.B) {
-
 	validate := New()
-
 	type Foo struct {
 		StringValue string `validate:"min=5,max=10"`
 		IntValue    int    `validate:"min=5,max=10"`
@@ -980,33 +884,28 @@ func BenchmarkStructSimpleSuccess(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(validFoo)
+		_ = validate.Struct(validFoo)
 	}
 }
 
 func BenchmarkStructSimpleSuccessParallel(b *testing.B) {
-
 	validate := New()
-
 	type Foo struct {
 		StringValue string `validate:"min=5,max=10"`
 		IntValue    int    `validate:"min=5,max=10"`
 	}
-
 	validFoo := &Foo{StringValue: "Foobar", IntValue: 7}
 
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(validFoo)
+			_ = validate.Struct(validFoo)
 		}
 	})
 }
 
 func BenchmarkStructSimpleFailure(b *testing.B) {
-
 	validate := New()
-
 	type Foo struct {
 		StringValue string `validate:"min=5,max=10"`
 		IntValue    int    `validate:"min=5,max=10"`
@@ -1016,14 +915,12 @@ func BenchmarkStructSimpleFailure(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(invalidFoo)
+		_ = validate.Struct(invalidFoo)
 	}
 }
 
 func BenchmarkStructSimpleFailureParallel(b *testing.B) {
-
 	validate := New()
-
 	type Foo struct {
 		StringValue string `validate:"min=5,max=10"`
 		IntValue    int    `validate:"min=5,max=10"`
@@ -1034,15 +931,13 @@ func BenchmarkStructSimpleFailureParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(invalidFoo)
+			_ = validate.Struct(invalidFoo)
 		}
 	})
 }
 
 func BenchmarkStructComplexSuccess(b *testing.B) {
-
 	validate := New()
-
 	tSuccess := &TestString{
 		Required:  "Required",
 		Len:       "length==10",
@@ -1072,14 +967,12 @@ func BenchmarkStructComplexSuccess(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(tSuccess)
+		_ = validate.Struct(tSuccess)
 	}
 }
 
 func BenchmarkStructComplexSuccessParallel(b *testing.B) {
-
 	validate := New()
-
 	tSuccess := &TestString{
 		Required:  "Required",
 		Len:       "length==10",
@@ -1110,15 +1003,13 @@ func BenchmarkStructComplexSuccessParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(tSuccess)
+			_ = validate.Struct(tSuccess)
 		}
 	})
 }
 
 func BenchmarkStructComplexFailure(b *testing.B) {
-
 	validate := New()
-
 	tFail := &TestString{
 		Required:  "",
 		Len:       "",
@@ -1145,14 +1036,12 @@ func BenchmarkStructComplexFailure(b *testing.B) {
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		validate.Struct(tFail)
+		_ = validate.Struct(tFail)
 	}
 }
 
 func BenchmarkStructComplexFailureParallel(b *testing.B) {
-
 	validate := New()
-
 	tFail := &TestString{
 		Required:  "",
 		Len:       "",
@@ -1180,7 +1069,7 @@ func BenchmarkStructComplexFailureParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			validate.Struct(tFail)
+			_ = validate.Struct(tFail)
 		}
 	})
 }
@@ -1193,7 +1082,7 @@ func BenchmarkOneof(b *testing.B) {
 	w := &TestOneof{Color: "green"}
 	val := New()
 	for i := 0; i < b.N; i++ {
-		val.Struct(w)
+		_ = val.Struct(w)
 	}
 }
 
@@ -1204,7 +1093,7 @@ func BenchmarkOneofParallel(b *testing.B) {
 	b.ResetTimer()
 	b.RunParallel(func(pb *testing.PB) {
 		for pb.Next() {
-			val.Struct(w)
+			_ = val.Struct(w)
 		}
 	})
 }

cache.go

@@ -39,9 +39,7 @@ func (sc *structCache) Get(key reflect.Type) (c *cStruct, found bool) {
 }
 
 func (sc *structCache) Set(key reflect.Type, value *cStruct) {
-
 	m := sc.m.Load().(map[reflect.Type]*cStruct)
-
 	nm := make(map[reflect.Type]*cStruct, len(m)+1)
 	for k, v := range m {
 		nm[k] = v
@@ -61,9 +59,7 @@ func (tc *tagCache) Get(key string) (c *cTag, found bool) {
 }
 
 func (tc *tagCache) Set(key string, value *cTag) {
-
 	m := tc.m.Load().(map[string]*cTag)
-
 	nm := make(map[string]*cTag, len(m)+1)
 	for k, v := range m {
 		nm[k] = v
@@ -87,22 +83,22 @@ type cField struct {
 }
 
 type cTag struct {
-	tag            string
+	tag                  string
-	aliasTag       string
+	aliasTag             string
-	actualAliasTag string
+	actualAliasTag       string
-	param          string
+	param                string
-	keys           *cTag // only populated when using tag's 'keys' and 'endkeys' for map key validation
+	keys                 *cTag // only populated when using tag's 'keys' and 'endkeys' for map key validation
-	next           *cTag
+	next                 *cTag
-	fn             FuncCtx
+	fn                   FuncCtx
-	typeof         tagType
+	typeof               tagType
-	hasTag         bool
+	hasTag               bool
-	hasAlias       bool
+	hasAlias             bool
-	hasParam       bool // true if parameter used eg. eq= where the equal sign has been set
+	hasParam             bool // true if parameter used eg. eq= where the equal sign has been set
-	isBlockEnd     bool // indicates the current tag represents the last validation in the block
+	isBlockEnd           bool // indicates the current tag represents the last validation in the block
+	runValidationWhenNil bool
 }
 
 func (v *Validate) extractStructCache(current reflect.Value, sName string) *cStruct {
-
 	v.structCache.lock.Lock()
 	defer v.structCache.lock.Unlock() // leave as defer! because if inner panics, it will never get unlocked otherwise!
 
@@ -141,9 +137,7 @@ func (v *Validate) extractStructCache(current reflect.Value, sName string) *cStr
 		customName = fld.Name
 
 		if v.hasTagNameFunc {
-
 			name := v.tagNameFunc(fld)
-
 			if len(name) > 0 {
 				customName = name
 			}
@@ -168,23 +162,17 @@ func (v *Validate) extractStructCache(current reflect.Value, sName string) *cStr
 			namesEqual: fld.Name == customName,
 		})
 	}
-
 	v.structCache.Set(typ, cs)
-
 	return cs
 }
 
 func (v *Validate) parseFieldTagsRecursive(tag string, fieldName string, alias string, hasAlias bool) (firstCtag *cTag, current *cTag) {
-
 	var t string
-	var ok bool
 	noAlias := len(alias) == 0
 	tags := strings.Split(tag, tagSeparator)
 
 	for i := 0; i < len(tags); i++ {
-
 		t = tags[i]
-
 		if noAlias {
 			alias = t
 		}
@@ -198,14 +186,13 @@ func (v *Validate) parseFieldTagsRecursive(tag string, fieldName string, alias s
 				current.next, current = next, curr
 
 			}
-
 			continue
 		}
 
 		var prevTag tagType
 
 		if i == 0 {
-			current = &cTag{aliasTag: alias, hasAlias: hasAlias, hasTag: true}
+			current = &cTag{aliasTag: alias, hasAlias: hasAlias, hasTag: true, typeof: typeDefault}
 			firstCtag = current
 		} else {
 			prevTag = current.typeof
@@ -214,7 +201,6 @@ func (v *Validate) parseFieldTagsRecursive(tag string, fieldName string, alias s
 		}
 
 		switch t {
-
 		case diveTag:
 			current.typeof = typeDive
 			continue
@@ -270,18 +256,14 @@ func (v *Validate) parseFieldTagsRecursive(tag string, fieldName string, alias s
 			continue
 
 		default:
-
 			if t == isdefault {
 				current.typeof = typeIsDefault
 			}
-
 			// if a pipe character is needed within the param you must use the utf8Pipe representation "0x7C"
 			orVals := strings.Split(t, orSeparator)
 
 			for j := 0; j < len(orVals); j++ {
-
 				vals := strings.SplitN(orVals[j], tagKeySeparator, 2)
-
 				if noAlias {
 					alias = vals[0]
 					current.aliasTag = alias
@@ -300,7 +282,10 @@ func (v *Validate) parseFieldTagsRecursive(tag string, fieldName string, alias s
 					panic(strings.TrimSpace(fmt.Sprintf(invalidValidation, fieldName)))
 				}
 
-				if current.fn, ok = v.validations[current.tag]; !ok {
+				if wrapper, ok := v.validations[current.tag]; ok {
+					current.fn = wrapper.fn
+					current.runValidationWhenNil = wrapper.runValidatinOnNil
+				} else {
 					panic(strings.TrimSpace(fmt.Sprintf(undefinedValidation, current.tag, fieldName)))
 				}
 

field_level.go

@@ -38,6 +38,10 @@ type FieldLevel interface {
 	// NOTE: when not successful ok will be false, this can happen when a nested struct is nil and so the field
 	// could not be retrieved because it didn't exist.
 	GetStructFieldOK() (reflect.Value, reflect.Kind, bool)
+
+	// GetStructFieldOKAdvanced is the same as GetStructFieldOK except that it accepts the parent struct to start looking for
+	// the field and namespace allowing more extensibility for validators.
+	GetStructFieldOKAdvanced(val reflect.Value, namespace string) (reflect.Value, reflect.Kind, bool)
 }
 
 var _ FieldLevel = new(validate)
@@ -67,3 +71,9 @@ func (v *validate) Param() string {
 func (v *validate) GetStructFieldOK() (reflect.Value, reflect.Kind, bool) {
 	return v.getStructFieldOKInternal(v.slflParent, v.ct.param)
 }
+
+// GetStructFieldOKAdvanced is the same as GetStructFieldOK except that it accepts the parent struct to start looking for
+// the field and namespace allowing more extensibility for validators.
+func (v *validate) GetStructFieldOKAdvanced(val reflect.Value, namespace string) (reflect.Value, reflect.Kind, bool) {
+	return v.getStructFieldOKInternal(val, namespace)
+}

translations/ja/ja.go

@@ -374,9 +374,7 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 					if err != nil {
 						goto END
 					}
-
 					t, err = ut.T("ne-items", fe.Field(), c)
-					break
 				default:
 					t, err = ut.T("ne", fe.Field(), fe.Param())
 				}

translations/zh/zh.go

@@ -9,7 +9,7 @@ import (
 	"time"
 
 	"github.com/go-playground/locales"
-	"github.com/go-playground/universal-translator"
+	ut "github.com/go-playground/universal-translator"
 	"gopkg.in/go-playground/validator.v9"
 )
 
@@ -430,10 +430,10 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				case reflect.Struct:
 					if fe.Type() != reflect.TypeOf(time.Time{}) {
 						err = fmt.Errorf("tag '%s'不能用于struct类型.", fe.Tag())
+					} else {
+						t, err = ut.T("lt-datetime", fe.Field())
 					}
 
-					t, err = ut.T("lt-datetime", fe.Field())
-
 				default:
 					err = fn()
 					if err != nil {
@@ -549,10 +549,10 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				case reflect.Struct:
 					if fe.Type() != reflect.TypeOf(time.Time{}) {
 						err = fmt.Errorf("tag '%s'不能用于struct类型.", fe.Tag())
+					} else {
+						t, err = ut.T("lte-datetime", fe.Field())
 					}
 
-					t, err = ut.T("lte-datetime", fe.Field())
-
 				default:
 					err = fn()
 					if err != nil {
@@ -668,9 +668,10 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				case reflect.Struct:
 					if fe.Type() != reflect.TypeOf(time.Time{}) {
 						err = fmt.Errorf("tag '%s'不能用于struct类型.", fe.Tag())
-					}
+					} else {
 
-					t, err = ut.T("gt-datetime", fe.Field())
+						t, err = ut.T("gt-datetime", fe.Field())
+					}
 
 				default:
 					err = fn()
@@ -787,10 +788,10 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				case reflect.Struct:
 					if fe.Type() != reflect.TypeOf(time.Time{}) {
 						err = fmt.Errorf("tag '%s'不能用于struct类型.", fe.Tag())
+					} else {
+						t, err = ut.T("gte-datetime", fe.Field())
 					}
 
-					t, err = ut.T("gte-datetime", fe.Field())
-
 				default:
 					err = fn()
 					if err != nil {

translations/zh/zh_test.go

@@ -5,7 +5,7 @@ import (
 	"time"
 
 	zhongwen "github.com/go-playground/locales/zh"
-	"github.com/go-playground/universal-translator"
+	ut "github.com/go-playground/universal-translator"
 	. "gopkg.in/go-playground/assert.v1"
 	"gopkg.in/go-playground/validator.v9"
 )
@@ -14,7 +14,7 @@ func TestTranslations(t *testing.T) {
 
 	zh := zhongwen.New()
 	uni := ut.New(zh, zh)
-	trans, ok := uni.GetTranslator("zh")
+	trans, _ := uni.GetTranslator("zh")
 
 	validate := validator.New()
 

translations/zh_tw/zh_tw.go

@@ -9,7 +9,7 @@ import (
 	"time"
 
 	"github.com/go-playground/locales"
-	"github.com/go-playground/universal-translator"
+	ut "github.com/go-playground/universal-translator"
 	"gopkg.in/go-playground/validator.v9"
 )
 
@@ -430,10 +430,10 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				case reflect.Struct:
 					if fe.Type() != reflect.TypeOf(time.Time{}) {
 						err = fmt.Errorf("tag '%s'不能用於struct類型.", fe.Tag())
+					} else {
+						t, err = ut.T("lt-datetime", fe.Field())
 					}
 
-					t, err = ut.T("lt-datetime", fe.Field())
-
 				default:
 					err = fn()
 					if err != nil {
@@ -549,10 +549,10 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				case reflect.Struct:
 					if fe.Type() != reflect.TypeOf(time.Time{}) {
 						err = fmt.Errorf("tag '%s'不能用於struct類型.", fe.Tag())
+					} else {
+						t, err = ut.T("lte-datetime", fe.Field())
 					}
 
-					t, err = ut.T("lte-datetime", fe.Field())
-
 				default:
 					err = fn()
 					if err != nil {
@@ -618,13 +618,10 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				var kind reflect.Kind
 
 				fn := func() (err error) {
-
 					if idx := strings.Index(fe.Param(), "."); idx != -1 {
 						digits = uint64(len(fe.Param()[idx+1:]))
 					}
-
 					f64, err = strconv.ParseFloat(fe.Param(), 64)
-
 					return
 				}
 
@@ -668,10 +665,10 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				case reflect.Struct:
 					if fe.Type() != reflect.TypeOf(time.Time{}) {
 						err = fmt.Errorf("tag '%s'不能用於struct類型.", fe.Tag())
+					} else {
+						t, err = ut.T("gt-datetime", fe.Field())
 					}
 
-					t, err = ut.T("gt-datetime", fe.Field())
-
 				default:
 					err = fn()
 					if err != nil {
@@ -787,10 +784,10 @@ func RegisterDefaultTranslations(v *validator.Validate, trans ut.Translator) (er
 				case reflect.Struct:
 					if fe.Type() != reflect.TypeOf(time.Time{}) {
 						err = fmt.Errorf("tag '%s'不能用於struct類型.", fe.Tag())
+					} else {
+						t, err = ut.T("gte-datetime", fe.Field())
 					}
 
-					t, err = ut.T("gte-datetime", fe.Field())
-
 				default:
 					err = fn()
 					if err != nil {

translations/zh_tw/zh_tw_test.go

@@ -5,7 +5,7 @@ import (
 	"time"
 
 	zhongwen "github.com/go-playground/locales/zh_Hant_TW"
-	"github.com/go-playground/universal-translator"
+	ut "github.com/go-playground/universal-translator"
 	. "gopkg.in/go-playground/assert.v1"
 	"gopkg.in/go-playground/validator.v9"
 )
@@ -14,7 +14,7 @@ func TestTranslations(t *testing.T) {
 
 	zh := zhongwen.New()
 	uni := ut.New(zh, zh)
-	trans, ok := uni.GetTranslator("zh")
+	trans, _ := uni.GetTranslator("zh")
 
 	validate := validator.New()
 

validator.go

@@ -94,7 +94,6 @@ func (v *validate) validateStruct(ctx context.Context, parent reflect.Value, cur
 
 // traverseField validates any field, be it a struct or single field, ensures it's validity and passes it along to be validated via it's tag options
 func (v *validate) traverseField(ctx context.Context, parent reflect.Value, current reflect.Value, ns []byte, structNs []byte, cf *cField, ct *cTag) {
-
 	var typ reflect.Type
 	var kind reflect.Kind
 
@@ -112,16 +111,36 @@ func (v *validate) traverseField(ctx context.Context, parent reflect.Value, curr
 		}
 
 		if ct.hasTag {
+			if kind == reflect.Invalid {
+				v.str1 = string(append(ns, cf.altName...))
+				if v.v.hasTagNameFunc {
+					v.str2 = string(append(structNs, cf.name...))
+				} else {
+					v.str2 = v.str1
+				}
+				v.errs = append(v.errs,
+					&fieldError{
+						v:              v.v,
+						tag:            ct.aliasTag,
+						actualTag:      ct.tag,
+						ns:             v.str1,
+						structNs:       v.str2,
+						fieldLen:       uint8(len(cf.altName)),
+						structfieldLen: uint8(len(cf.name)),
+						param:          ct.param,
+						kind:           kind,
+					},
+				)
+				return
+			}
 
 			v.str1 = string(append(ns, cf.altName...))
-
 			if v.v.hasTagNameFunc {
 				v.str2 = string(append(structNs, cf.name...))
 			} else {
 				v.str2 = v.str1
 			}
-
+			if !ct.runValidationWhenNil {
-			if kind == reflect.Invalid {
 				v.errs = append(v.errs,
 					&fieldError{
 						v:              v.v,
@@ -131,31 +150,14 @@ func (v *validate) traverseField(ctx context.Context, parent reflect.Value, curr
 						structNs:       v.str2,
 						fieldLen:       uint8(len(cf.altName)),
 						structfieldLen: uint8(len(cf.name)),
+						value:          current.Interface(),
 						param:          ct.param,
 						kind:           kind,
+						typ:            current.Type(),
 					},
 				)
-
 				return
 			}
-
-			v.errs = append(v.errs,
-				&fieldError{
-					v:              v.v,
-					tag:            ct.aliasTag,
-					actualTag:      ct.tag,
-					ns:             v.str1,
-					structNs:       v.str2,
-					fieldLen:       uint8(len(cf.altName)),
-					structfieldLen: uint8(len(cf.name)),
-					value:          current.Interface(),
-					param:          ct.param,
-					kind:           kind,
-					typ:            current.Type(),
-				},
-			)
-
-			return
 		}
 
 	case reflect.Struct:

validator_instance.go

@@ -13,27 +13,31 @@ import (
 )
 
 const (
-	defaultTagName     = "validate"
+	defaultTagName        = "validate"
-	utf8HexComma       = "0x2C"
+	utf8HexComma          = "0x2C"
-	utf8Pipe           = "0x7C"
+	utf8Pipe              = "0x7C"
-	tagSeparator       = ","
+	tagSeparator          = ","
-	orSeparator        = "|"
+	orSeparator           = "|"
-	tagKeySeparator    = "="
+	tagKeySeparator       = "="
-	structOnlyTag      = "structonly"
+	structOnlyTag         = "structonly"
-	noStructLevelTag   = "nostructlevel"
+	noStructLevelTag      = "nostructlevel"
-	omitempty          = "omitempty"
+	omitempty             = "omitempty"
-	isdefault          = "isdefault"
+	isdefault             = "isdefault"
-	skipValidationTag  = "-"
+	requiredWithoutAllTag = "required_without_all"
-	diveTag            = "dive"
+	requiredWithoutTag    = "required_without"
-	keysTag            = "keys"
+	requiredWithTag       = "required_with"
-	endKeysTag         = "endkeys"
+	requiredWithAllTag    = "required_with_all"
-	requiredTag        = "required"
+	skipValidationTag     = "-"
-	namespaceSeparator = "."
+	diveTag               = "dive"
-	leftBracket        = "["
+	keysTag               = "keys"
-	rightBracket       = "]"
+	endKeysTag            = "endkeys"
-	restrictedTagChars = ".[],|=+()`~!@#$%^&*\\\"/?<>{}"
+	requiredTag           = "required"
-	restrictedAliasErr = "Alias '%s' either contains restricted characters or is the same as a restricted tag needed for normal operation"
+	namespaceSeparator    = "."
-	restrictedTagErr   = "Tag '%s' either contains restricted characters or is the same as a restricted tag needed for normal operation"
+	leftBracket           = "["
+	rightBracket          = "]"
+	restrictedTagChars    = ".[],|=+()`~!@#$%^&*\\\"/?<>{}"
+	restrictedAliasErr    = "Alias '%s' either contains restricted characters or is the same as a restricted tag needed for normal operation"
+	restrictedTagErr      = "Tag '%s' either contains restricted characters or is the same as a restricted tag needed for normal operation"
 )
 
 var (
@@ -55,6 +59,11 @@ type CustomTypeFunc func(field reflect.Value) interface{}
 // TagNameFunc allows for adding of a custom tag name parser
 type TagNameFunc func(field reflect.StructField) string
 
+type internalValidationFuncWrapper struct {
+	fn                FuncCtx
+	runValidatinOnNil bool
+}
+
 // Validate contains the validator settings and cache
 type Validate struct {
 	tagName          string
@@ -65,7 +74,7 @@ type Validate struct {
 	structLevelFuncs map[reflect.Type]StructLevelFuncCtx
 	customFuncs      map[reflect.Type]CustomTypeFunc
 	aliases          map[string]string
-	validations      map[string]FuncCtx
+	validations      map[string]internalValidationFuncWrapper
 	transTagFunc     map[ut.Translator]map[string]TranslationFunc // map[<locale>]map[<tag>]TranslationFunc
 	tagCache         *tagCache
 	structCache      *structCache
@@ -83,7 +92,7 @@ func New() *Validate {
 	v := &Validate{
 		tagName:     defaultTagName,
 		aliases:     make(map[string]string, len(bakedInAliases)),
-		validations: make(map[string]FuncCtx, len(bakedInValidators)),
+		validations: make(map[string]internalValidationFuncWrapper, len(bakedInValidators)),
 		tagCache:    tc,
 		structCache: sc,
 	}
@@ -96,8 +105,14 @@ func New() *Validate {
 	// must copy validators for separate validations to be used in each instance
 	for k, val := range bakedInValidators {
 
-		// no need to error check here, baked in will always be valid
+		switch k {
-		_ = v.registerValidation(k, wrapFunc(val), true)
+		// these require that even if the value is nil that the validation should run, omitempty still overrides this behaviour
+		case requiredWithTag, requiredWithAllTag, requiredWithoutTag, requiredWithoutAllTag:
+			_ = v.registerValidation(k, wrapFunc(val), true, true)
+		default:
+			// no need to error check here, baked in will always be valid
+			_ = v.registerValidation(k, wrapFunc(val), true, false)
+		}
 	}
 
 	v.pool = &sync.Pool{
@@ -140,18 +155,21 @@ func (v *Validate) RegisterTagNameFunc(fn TagNameFunc) {
 // NOTES:
 // - if the key already exists, the previous validation function will be replaced.
 // - this method is not thread-safe it is intended that these all be registered prior to any validation
-func (v *Validate) RegisterValidation(tag string, fn Func) error {
+func (v *Validate) RegisterValidation(tag string, fn Func, callValidationEvenIfNull ...bool) error {
-	return v.RegisterValidationCtx(tag, wrapFunc(fn))
+	return v.RegisterValidationCtx(tag, wrapFunc(fn), callValidationEvenIfNull...)
 }
 
 // RegisterValidationCtx does the same as RegisterValidation on accepts a FuncCtx validation
 // allowing context.Context validation support.
-func (v *Validate) RegisterValidationCtx(tag string, fn FuncCtx) error {
+func (v *Validate) RegisterValidationCtx(tag string, fn FuncCtx, callValidationEvenIfNull ...bool) error {
-	return v.registerValidation(tag, fn, false)
+	var nilCheckable bool
+	if len(callValidationEvenIfNull) > 0 {
+		nilCheckable = callValidationEvenIfNull[0]
+	}
+	return v.registerValidation(tag, fn, false, nilCheckable)
 }
 
-func (v *Validate) registerValidation(tag string, fn FuncCtx, bakedIn bool) error {
+func (v *Validate) registerValidation(tag string, fn FuncCtx, bakedIn bool, nilCheckable bool) error {
-
 	if len(tag) == 0 {
 		return errors.New("Function Key cannot be empty")
 	}
@@ -161,13 +179,10 @@ func (v *Validate) registerValidation(tag string, fn FuncCtx, bakedIn bool) erro
 	}
 
 	_, ok := restrictedTags[tag]
-
 	if !bakedIn && (ok || strings.ContainsAny(tag, restrictedTagChars)) {
 		panic(fmt.Sprintf(restrictedTagErr, tag))
 	}
-
+	v.validations[tag] = internalValidationFuncWrapper{fn: fn, runValidatinOnNil: nilCheckable}
-	v.validations[tag] = fn
-
 	return nil
 }
 

validator_test.go

@@ -462,6 +462,8 @@ func TestAnonymous(t *testing.T) {
 		},
 	}
 
+	Equal(t, tst.anonymousC.c, "")
+
 	err := validate.Struct(tst)
 	NotEqual(t, err, nil)
 
@@ -715,16 +717,15 @@ func TestNilValidator(t *testing.T) {
 	}
 
 	PanicMatches(t, func() { val.RegisterCustomTypeFunc(ValidateCustomType, MadeUpCustomType{}) }, "runtime error: invalid memory address or nil pointer dereference")
-	PanicMatches(t, func() { val.RegisterValidation("something", fn) }, "runtime error: invalid memory address or nil pointer dereference")
+	PanicMatches(t, func() { _ = val.RegisterValidation("something", fn) }, "runtime error: invalid memory address or nil pointer dereference")
-	PanicMatches(t, func() { val.Var(ts.Test, "required") }, "runtime error: invalid memory address or nil pointer dereference")
+	PanicMatches(t, func() { _ = val.Var(ts.Test, "required") }, "runtime error: invalid memory address or nil pointer dereference")
-	PanicMatches(t, func() { val.VarWithValue("test", ts.Test, "required") }, "runtime error: invalid memory address or nil pointer dereference")
+	PanicMatches(t, func() { _ = val.VarWithValue("test", ts.Test, "required") }, "runtime error: invalid memory address or nil pointer dereference")
-	PanicMatches(t, func() { val.Struct(ts) }, "runtime error: invalid memory address or nil pointer dereference")
+	PanicMatches(t, func() { _ = val.Struct(ts) }, "runtime error: invalid memory address or nil pointer dereference")
-	PanicMatches(t, func() { val.StructExcept(ts, "Test") }, "runtime error: invalid memory address or nil pointer dereference")
+	PanicMatches(t, func() { _ = val.StructExcept(ts, "Test") }, "runtime error: invalid memory address or nil pointer dereference")
-	PanicMatches(t, func() { val.StructPartial(ts, "Test") }, "runtime error: invalid memory address or nil pointer dereference")
+	PanicMatches(t, func() { _ = val.StructPartial(ts, "Test") }, "runtime error: invalid memory address or nil pointer dereference")
 }
 
 func TestStructPartial(t *testing.T) {
-
 	p1 := []string{
 		"NoTag",
 		"Required",
@@ -1850,7 +1851,7 @@ func TestSQLValue2Validation(t *testing.T) {
 
 	val.Name = "errorme"
 
-	PanicMatches(t, func() { validate.Var(val, "required") }, "SQL Driver Valuer error: some kind of error")
+	PanicMatches(t, func() { _ = validate.Var(val, "required") }, "SQL Driver Valuer error: some kind of error")
 
 	myVal := valuer{
 		Name: "",
@@ -2675,7 +2676,7 @@ func TestBadKeyValidation(t *testing.T) {
 
 	validate := New()
 
-	PanicMatches(t, func() { validate.Struct(tst) }, "Undefined validation function ' ' on field 'Name'")
+	PanicMatches(t, func() { _ = validate.Struct(tst) }, "Undefined validation function ' ' on field 'Name'")
 
 	type Test2 struct {
 		Name string `validate:"required,,len=2"`
@@ -2685,7 +2686,7 @@ func TestBadKeyValidation(t *testing.T) {
 		Name: "test",
 	}
 
-	PanicMatches(t, func() { validate.Struct(tst2) }, "Invalid validation tag on field 'Name'")
+	PanicMatches(t, func() { _ = validate.Struct(tst2) }, "Invalid validation tag on field 'Name'")
 }
 
 func TestInterfaceErrValidation(t *testing.T) {
@@ -3009,7 +3010,7 @@ func TestArrayDiveValidation(t *testing.T) {
 		Name: "TEST",
 	}
 
-	PanicMatches(t, func() { validate.Struct(bd) }, "dive error! can't dive on a non slice or map")
+	PanicMatches(t, func() { _ = validate.Struct(bd) }, "dive error! can't dive on a non slice or map")
 
 	type Test struct {
 		Errs []string `validate:"gt=0,dive,required"`
@@ -3372,7 +3373,7 @@ func TestLongitudeValidation(t *testing.T) {
 		}
 	}
 
-	PanicMatches(t, func() { validate.Var(true, "longitude") }, "Bad field type bool")
+	PanicMatches(t, func() { _ = validate.Var(true, "longitude") }, "Bad field type bool")
 }
 
 func TestLatitudeValidation(t *testing.T) {
@@ -3414,7 +3415,7 @@ func TestLatitudeValidation(t *testing.T) {
 		}
 	}
 
-	PanicMatches(t, func() { validate.Var(true, "latitude") }, "Bad field type bool")
+	PanicMatches(t, func() { _ = validate.Var(true, "latitude") }, "Bad field type bool")
 }
 
 func TestDataURIValidation(t *testing.T) {
@@ -4317,7 +4318,7 @@ func TestIsNeValidation(t *testing.T) {
 	NotEqual(t, errs, nil)
 	AssertError(t, errs, "", "", "", "", "ne")
 
-	PanicMatches(t, func() { validate.Var(now, "ne=now") }, "Bad field type time.Time")
+	PanicMatches(t, func() { _ = validate.Var(now, "ne=now") }, "Bad field type time.Time")
 }
 
 func TestIsEqFieldValidation(t *testing.T) {
@@ -4471,7 +4472,7 @@ func TestIsEqValidation(t *testing.T) {
 	NotEqual(t, errs, nil)
 	AssertError(t, errs, "", "", "", "", "eq")
 
-	PanicMatches(t, func() { validate.Var(now, "eq=now") }, "Bad field type time.Time")
+	PanicMatches(t, func() { _ = validate.Var(now, "eq=now") }, "Bad field type time.Time")
 }
 
 func TestOneOfValidation(t *testing.T) {
@@ -4530,7 +4531,7 @@ func TestOneOfValidation(t *testing.T) {
 	}
 
 	PanicMatches(t, func() {
-		validate.Var(3.14, "oneof=red green")
+		_ = validate.Var(3.14, "oneof=red green")
 	}, "Bad field type float64")
 }
 
@@ -4634,7 +4635,7 @@ func TestFileValidation(t *testing.T) {
 	}
 
 	PanicMatches(t, func() {
-		validate.Var(6, "file")
+		_ = validate.Var(6, "file")
 	}, "Bad field type int")
 }
 
@@ -5724,7 +5725,6 @@ func TestGteField(t *testing.T) {
 }
 
 func TestValidateByTagAndValue(t *testing.T) {
-
 	validate := New()
 
 	val := "test"
@@ -5737,7 +5737,8 @@ func TestValidateByTagAndValue(t *testing.T) {
 		return fl.Parent().String() == fl.Field().String()
 	}
 
-	validate.RegisterValidation("isequaltestfunc", fn)
+	errs = validate.RegisterValidation("isequaltestfunc", fn)
+	Equal(t, errs, nil)
 
 	errs = validate.VarWithValue(val, field, "isequaltestfunc")
 	Equal(t, errs, nil)
@@ -5768,7 +5769,7 @@ func TestAddFunctions(t *testing.T) {
 	errs = validate.RegisterValidation("", fn)
 	NotEqual(t, errs, nil)
 
-	validate.RegisterValidation("new", nil)
+	errs = validate.RegisterValidation("new", nil)
 	NotEqual(t, errs, nil)
 
 	errs = validate.RegisterValidation("new", fn)
@@ -5777,7 +5778,7 @@ func TestAddFunctions(t *testing.T) {
 	errs = validate.RegisterValidationCtx("new", fnCtx)
 	Equal(t, errs, nil)
 
-	PanicMatches(t, func() { validate.RegisterValidation("dive", fn) }, "Tag 'dive' either contains restricted characters or is the same as a restricted tag needed for normal operation")
+	PanicMatches(t, func() { _ = validate.RegisterValidation("dive", fn) }, "Tag 'dive' either contains restricted characters or is the same as a restricted tag needed for normal operation")
 }
 
 func TestChangeTag(t *testing.T) {
@@ -5803,7 +5804,6 @@ func TestChangeTag(t *testing.T) {
 }
 
 func TestUnexposedStruct(t *testing.T) {
-
 	validate := New()
 
 	type Test struct {
@@ -5816,41 +5816,36 @@ func TestUnexposedStruct(t *testing.T) {
 	s := &Test{
 		Name: "TEST",
 	}
+	Equal(t, s.unexposed.A, "")
 
 	errs := validate.Struct(s)
 	Equal(t, errs, nil)
 }
 
 func TestBadParams(t *testing.T) {
-
 	validate := New()
-
 	i := 1
 	errs := validate.Var(i, "-")
 	Equal(t, errs, nil)
 
-	PanicMatches(t, func() { validate.Var(i, "len=a") }, "strconv.ParseInt: parsing \"a\": invalid syntax")
+	PanicMatches(t, func() { _ = validate.Var(i, "len=a") }, "strconv.ParseInt: parsing \"a\": invalid syntax")
-	PanicMatches(t, func() { validate.Var(i, "len=a") }, "strconv.ParseInt: parsing \"a\": invalid syntax")
+	PanicMatches(t, func() { _ = validate.Var(i, "len=a") }, "strconv.ParseInt: parsing \"a\": invalid syntax")
 
 	var ui uint = 1
-	PanicMatches(t, func() { validate.Var(ui, "len=a") }, "strconv.ParseUint: parsing \"a\": invalid syntax")
+	PanicMatches(t, func() { _ = validate.Var(ui, "len=a") }, "strconv.ParseUint: parsing \"a\": invalid syntax")
 
 	f := 1.23
-	PanicMatches(t, func() { validate.Var(f, "len=a") }, "strconv.ParseFloat: parsing \"a\": invalid syntax")
+	PanicMatches(t, func() { _ = validate.Var(f, "len=a") }, "strconv.ParseFloat: parsing \"a\": invalid syntax")
 }
 
 func TestLength(t *testing.T) {
-
 	validate := New()
-
 	i := true
-	PanicMatches(t, func() { validate.Var(i, "len") }, "Bad field type bool")
+	PanicMatches(t, func() { _ = validate.Var(i, "len") }, "Bad field type bool")
 }
 
 func TestIsGt(t *testing.T) {
-
 	validate := New()
-
 	myMap := map[string]string{}
 	errs := validate.Var(myMap, "gt=0")
 	NotEqual(t, errs, nil)
@@ -5866,7 +5861,7 @@ func TestIsGt(t *testing.T) {
 	AssertError(t, errs, "", "", "", "", "gt")
 
 	i := true
-	PanicMatches(t, func() { validate.Var(i, "gt") }, "Bad field type bool")
+	PanicMatches(t, func() { _ = validate.Var(i, "gt") }, "Bad field type bool")
 
 	tm := time.Now().UTC()
 	tm = tm.Add(time.Hour * 24)
@@ -5900,11 +5895,9 @@ func TestIsGt(t *testing.T) {
 }
 
 func TestIsGte(t *testing.T) {
-
 	validate := New()
-
 	i := true
-	PanicMatches(t, func() { validate.Var(i, "gte") }, "Bad field type bool")
+	PanicMatches(t, func() { _ = validate.Var(i, "gte") }, "Bad field type bool")
 
 	t1 := time.Now().UTC()
 	t1 = t1.Add(time.Hour * 24)
@@ -5938,9 +5931,7 @@ func TestIsGte(t *testing.T) {
 }
 
 func TestIsLt(t *testing.T) {
-
 	validate := New()
-
 	myMap := map[string]string{}
 	errs := validate.Var(myMap, "lt=0")
 	NotEqual(t, errs, nil)
@@ -5957,7 +5948,7 @@ func TestIsLt(t *testing.T) {
 	AssertError(t, errs, "", "", "", "", "lt")
 
 	i := true
-	PanicMatches(t, func() { validate.Var(i, "lt") }, "Bad field type bool")
+	PanicMatches(t, func() { _ = validate.Var(i, "lt") }, "Bad field type bool")
 
 	t1 := time.Now().UTC().Add(-time.Hour)
 
@@ -5996,7 +5987,7 @@ func TestIsLte(t *testing.T) {
 	validate := New()
 
 	i := true
-	PanicMatches(t, func() { validate.Var(i, "lte") }, "Bad field type bool")
+	PanicMatches(t, func() { _ = validate.Var(i, "lte") }, "Bad field type bool")
 
 	t1 := time.Now().UTC().Add(-time.Hour)
 
@@ -6103,7 +6094,7 @@ func TestUrnRFC2141(t *testing.T) {
 	}
 
 	i := 1
-	PanicMatches(t, func() { validate.Var(i, tag) }, "Bad field type int")
+	PanicMatches(t, func() { _ = validate.Var(i, tag) }, "Bad field type int")
 }
 
 func TestUrl(t *testing.T) {
@@ -6171,7 +6162,7 @@ func TestUrl(t *testing.T) {
 	}
 
 	i := 1
-	PanicMatches(t, func() { validate.Var(i, "url") }, "Bad field type int")
+	PanicMatches(t, func() { _ = validate.Var(i, "url") }, "Bad field type int")
 }
 
 func TestUri(t *testing.T) {
@@ -6238,7 +6229,7 @@ func TestUri(t *testing.T) {
 	}
 
 	i := 1
-	PanicMatches(t, func() { validate.Var(i, "uri") }, "Bad field type int")
+	PanicMatches(t, func() { _ = validate.Var(i, "uri") }, "Bad field type int")
 }
 
 func TestOrTag(t *testing.T) {
@@ -6280,8 +6271,8 @@ func TestOrTag(t *testing.T) {
 
 	s = "this is right, but a blank or isn't"
 
-	PanicMatches(t, func() { validate.Var(s, "rgb||len=13") }, "Invalid validation tag on field ''")
+	PanicMatches(t, func() { _ = validate.Var(s, "rgb||len=13") }, "Invalid validation tag on field ''")
-	PanicMatches(t, func() { validate.Var(s, "rgb|rgbaa|len=13") }, "Undefined validation function 'rgbaa' on field ''")
+	PanicMatches(t, func() { _ = validate.Var(s, "rgb|rgbaa|len=13") }, "Undefined validation function 'rgbaa' on field ''")
 
 	v2 := New()
 	v2.RegisterTagNameFunc(func(fld reflect.StructField) string {
@@ -6351,7 +6342,7 @@ func TestHsla(t *testing.T) {
 	AssertError(t, errs, "", "", "", "", "hsla")
 
 	i := 1
-	validate.Var(i, "hsla")
+	errs = validate.Var(i, "hsla")
 	NotEqual(t, errs, nil)
 	AssertError(t, errs, "", "", "", "", "hsla")
 }
@@ -7053,7 +7044,7 @@ func TestInvalidValidatorFunction(t *testing.T) {
 		Test: "1",
 	}
 
-	PanicMatches(t, func() { validate.Var(s.Test, "zzxxBadFunction") }, "Undefined validation function 'zzxxBadFunction' on field ''")
+	PanicMatches(t, func() { _ = validate.Var(s.Test, "zzxxBadFunction") }, "Undefined validation function 'zzxxBadFunction' on field ''")
 }
 
 func TestCustomFieldName(t *testing.T) {
@@ -7309,15 +7300,15 @@ func TestTranslations(t *testing.T) {
 }
 
 func TestTranslationErrors(t *testing.T) {
-
 	en := en.New()
 	uni := ut.New(en, en, fr.New())
 
 	trans, _ := uni.GetTranslator("en")
-	trans.Add("required", "{0} is a required field", false) // using translator outside of validator also
+	err := trans.Add("required", "{0} is a required field", false) // using translator outside of validator also
+	Equal(t, err, nil)
 
 	validate := New()
-	err := validate.RegisterTranslation("required", trans,
+	err = validate.RegisterTranslation("required", trans,
 		func(ut ut.Translator) (err error) {
 
 			// using this stype because multiple translation may have to be added for the full translation
@@ -7766,31 +7757,40 @@ func TestFieldLevelName(t *testing.T) {
 
 		return name
 	})
-	validate.RegisterValidation("custom1", func(fl FieldLevel) bool {
+	err := validate.RegisterValidation("custom1", func(fl FieldLevel) bool {
 		res1 = fl.FieldName()
 		alt1 = fl.StructFieldName()
 		return true
 	})
-	validate.RegisterValidation("custom2", func(fl FieldLevel) bool {
+	Equal(t, err, nil)
+
+	err = validate.RegisterValidation("custom2", func(fl FieldLevel) bool {
 		res2 = fl.FieldName()
 		alt2 = fl.StructFieldName()
 		return true
 	})
-	validate.RegisterValidation("custom3", func(fl FieldLevel) bool {
+	Equal(t, err, nil)
+
+	err = validate.RegisterValidation("custom3", func(fl FieldLevel) bool {
 		res3 = fl.FieldName()
 		alt3 = fl.StructFieldName()
 		return true
 	})
-	validate.RegisterValidation("custom4", func(fl FieldLevel) bool {
+	Equal(t, err, nil)
+
+	err = validate.RegisterValidation("custom4", func(fl FieldLevel) bool {
 		res4 = fl.FieldName()
 		alt4 = fl.StructFieldName()
 		return true
 	})
-	validate.RegisterValidation("custom5", func(fl FieldLevel) bool {
+	Equal(t, err, nil)
+
+	err = validate.RegisterValidation("custom5", func(fl FieldLevel) bool {
 		res5 = fl.FieldName()
 		alt5 = fl.StructFieldName()
 		return true
 	})
+	Equal(t, err, nil)
 
 	test := Test{
 		String: "test",
@@ -7813,7 +7813,6 @@ func TestFieldLevelName(t *testing.T) {
 }
 
 func TestValidateStructRegisterCtx(t *testing.T) {
-
 	var ctxVal string
 
 	fnCtx := func(ctx context.Context, fl FieldLevel) bool {
@@ -7833,7 +7832,9 @@ func TestValidateStructRegisterCtx(t *testing.T) {
 	var tst Test
 
 	validate := New()
-	validate.RegisterValidationCtx("val", fnCtx)
+	err := validate.RegisterValidationCtx("val", fnCtx)
+	Equal(t, err, nil)
+
 	validate.RegisterStructValidationCtx(slFn, Test{})
 
 	ctx := context.WithValue(context.Background(), &ctxVal, "testval")
@@ -8039,7 +8040,6 @@ func TestFQDNValidation(t *testing.T) {
 }
 
 func TestIsDefault(t *testing.T) {
-
 	validate := New()
 
 	type Inner struct {
@@ -8066,11 +8066,9 @@ func TestIsDefault(t *testing.T) {
 
 	validate.RegisterTagNameFunc(func(fld reflect.StructField) string {
 		name := strings.SplitN(fld.Tag.Get("json"), ",", 2)[0]
-
 		if name == "-" {
 			return ""
 		}
-
 		return name
 	})
 
@@ -8157,7 +8155,7 @@ func TestUniqueValidation(t *testing.T) {
 			}
 		}
 	}
-	PanicMatches(t, func() { validate.Var(1.0, "unique") }, "Bad field type float64")
+	PanicMatches(t, func() { _ = validate.Var(1.0, "unique") }, "Bad field type float64")
 }
 
 func TestHTMLValidation(t *testing.T) {
@@ -8362,8 +8360,8 @@ func TestKeys(t *testing.T) {
 
 	// test bad tag definitions
 
-	PanicMatches(t, func() { validate.Var(map[string]string{"key": "val"}, "endkeys,dive,eq=val") }, "'endkeys' tag encountered without a corresponding 'keys' tag")
+	PanicMatches(t, func() { _ = validate.Var(map[string]string{"key": "val"}, "endkeys,dive,eq=val") }, "'endkeys' tag encountered without a corresponding 'keys' tag")
-	PanicMatches(t, func() { validate.Var(1, "keys,eq=1,endkeys") }, "'keys' tag must be immediately preceded by the 'dive' tag")
+	PanicMatches(t, func() { _ = validate.Var(1, "keys,eq=1,endkeys") }, "'keys' tag must be immediately preceded by the 'dive' tag")
 
 	// test custom tag name
 	validate = New()
@@ -8391,7 +8389,6 @@ func TestKeys(t *testing.T) {
 
 // Thanks @adrian-sgn specific test for your specific scenario
 func TestKeysCustomValidation(t *testing.T) {
-
 	type LangCode string
 	type Label map[LangCode]string
 
@@ -8400,7 +8397,7 @@ func TestKeysCustomValidation(t *testing.T) {
 	}
 
 	validate := New()
-	validate.RegisterValidation("lang_code", func(fl FieldLevel) bool {
+	err := validate.RegisterValidation("lang_code", func(fl FieldLevel) bool {
 		validLangCodes := map[LangCode]struct{}{
 			"en": {},
 			"es": {},
@@ -8410,6 +8407,7 @@ func TestKeysCustomValidation(t *testing.T) {
 		_, ok := validLangCodes[fl.Field().Interface().(LangCode)]
 		return ok
 	})
+	Equal(t, err, nil)
 
 	label := Label{
 		"en":  "Good morning!",
@@ -8419,7 +8417,7 @@ func TestKeysCustomValidation(t *testing.T) {
 		"xxx": "",
 	}
 
-	err := validate.Struct(TestMapStructPtr{label})
+	err = validate.Struct(TestMapStructPtr{label})
 	NotEqual(t, err, nil)
 
 	errs := err.(ValidationErrors)
@@ -8562,7 +8560,7 @@ func TestDirValidation(t *testing.T) {
 	}
 
 	PanicMatches(t, func() {
-		validate.Var(2, "dir")
+		_ = validate.Var(2, "dir")
 	}, "Bad field type int")
 }
 
@@ -8621,17 +8619,22 @@ func TestEndsWithValidation(t *testing.T) {
 }
 
 func TestRequiredWith(t *testing.T) {
+	type Inner struct {
+		Field *string
+	}
+
 	fieldVal := "test"
 	test := struct {
+		Inner   *Inner
 		FieldE  string            `validate:"omitempty" json:"field_e"`
 		FieldER string            `validate:"required_with=FieldE" json:"field_er"`
 		Field1  string            `validate:"omitempty" json:"field_1"`
 		Field2  *string           `validate:"required_with=Field1" json:"field_2"`
 		Field3  map[string]string `validate:"required_with=Field2" json:"field_3"`
 		Field4  interface{}       `validate:"required_with=Field3" json:"field_4"`
-		Field5  string            `validate:"required_with=Field3" json:"field_5"`
+		Field5  string            `validate:"required_with=Inner.Field" json:"field_5"`
 	}{
-		Field1: "test_field1",
+		Inner:  &Inner{Field: &fieldVal},
 		Field2: &fieldVal,
 		Field3: map[string]string{"key": "val"},
 		Field4: "test",
@@ -8641,24 +8644,52 @@ func TestRequiredWith(t *testing.T) {
 	validate := New()
 
 	errs := validate.Struct(test)
+	Equal(t, errs, nil)
 
-	if errs != nil {
+	test2 := struct {
-		t.Fatalf("failed Error: %s", errs)
+		Inner   *Inner
+		Inner2  *Inner
+		FieldE  string            `validate:"omitempty" json:"field_e"`
+		FieldER string            `validate:"required_with=FieldE" json:"field_er"`
+		Field1  string            `validate:"omitempty" json:"field_1"`
+		Field2  *string           `validate:"required_with=Field1" json:"field_2"`
+		Field3  map[string]string `validate:"required_with=Field2" json:"field_3"`
+		Field4  interface{}       `validate:"required_with=Field2" json:"field_4"`
+		Field5  string            `validate:"required_with=Field3" json:"field_5"`
+		Field6  string            `validate:"required_with=Inner.Field" json:"field_6"`
+		Field7  string            `validate:"required_with=Inner2.Field" json:"field_7"`
+	}{
+		Inner:  &Inner{Field: &fieldVal},
+		Field2: &fieldVal,
 	}
+
+	errs = validate.Struct(test2)
+	NotEqual(t, errs, nil)
+
+	ve := errs.(ValidationErrors)
+	Equal(t, len(ve), 3)
+	AssertError(t, errs, "Field3", "Field3", "Field3", "Field3", "required_with")
+	AssertError(t, errs, "Field4", "Field4", "Field4", "Field4", "required_with")
+	AssertError(t, errs, "Field6", "Field6", "Field6", "Field6", "required_with")
 }
 
 func TestRequiredWithAll(t *testing.T) {
+	type Inner struct {
+		Field *string
+	}
 
 	fieldVal := "test"
 	test := struct {
+		Inner   *Inner
 		FieldE  string            `validate:"omitempty" json:"field_e"`
 		FieldER string            `validate:"required_with_all=FieldE" json:"field_er"`
 		Field1  string            `validate:"omitempty" json:"field_1"`
 		Field2  *string           `validate:"required_with_all=Field1" json:"field_2"`
 		Field3  map[string]string `validate:"required_with_all=Field2" json:"field_3"`
 		Field4  interface{}       `validate:"required_with_all=Field3" json:"field_4"`
-		Field5  string            `validate:"required_with_all=Field3" json:"field_5"`
+		Field5  string            `validate:"required_with_all=Inner.Field" json:"field_5"`
 	}{
+		Inner:  &Inner{Field: &fieldVal},
 		Field1: "test_field1",
 		Field2: &fieldVal,
 		Field3: map[string]string{"key": "val"},
@@ -8669,22 +8700,49 @@ func TestRequiredWithAll(t *testing.T) {
 	validate := New()
 
 	errs := validate.Struct(test)
+	Equal(t, errs, nil)
 
-	if errs != nil {
+	test2 := struct {
-		t.Fatalf("failed Error: %s", errs)
+		Inner   *Inner
+		Inner2  *Inner
+		FieldE  string            `validate:"omitempty" json:"field_e"`
+		FieldER string            `validate:"required_with_all=FieldE" json:"field_er"`
+		Field1  string            `validate:"omitempty" json:"field_1"`
+		Field2  *string           `validate:"required_with_all=Field1" json:"field_2"`
+		Field3  map[string]string `validate:"required_with_all=Field2" json:"field_3"`
+		Field4  interface{}       `validate:"required_with_all=Field1 FieldE" json:"field_4"`
+		Field5  string            `validate:"required_with_all=Inner.Field Field2" json:"field_5"`
+		Field6  string            `validate:"required_with_all=Inner2.Field Field2" json:"field_6"`
+	}{
+		Inner:  &Inner{Field: &fieldVal},
+		Field2: &fieldVal,
 	}
+
+	errs = validate.Struct(test2)
+	NotEqual(t, errs, nil)
+
+	ve := errs.(ValidationErrors)
+	Equal(t, len(ve), 2)
+	AssertError(t, errs, "Field3", "Field3", "Field3", "Field3", "required_with_all")
+	AssertError(t, errs, "Field5", "Field5", "Field5", "Field5", "required_with_all")
 }
 
 func TestRequiredWithout(t *testing.T) {
 
+	type Inner struct {
+		Field *string
+	}
+
 	fieldVal := "test"
 	test := struct {
+		Inner  *Inner
 		Field1 string            `validate:"omitempty" json:"field_1"`
 		Field2 *string           `validate:"required_without=Field1" json:"field_2"`
 		Field3 map[string]string `validate:"required_without=Field2" json:"field_3"`
 		Field4 interface{}       `validate:"required_without=Field3" json:"field_4"`
 		Field5 string            `validate:"required_without=Field3" json:"field_5"`
 	}{
+		Inner:  &Inner{Field: &fieldVal},
 		Field2: &fieldVal,
 		Field3: map[string]string{"key": "val"},
 		Field4: "test",
@@ -8694,29 +8752,35 @@ func TestRequiredWithout(t *testing.T) {
 	validate := New()
 
 	errs := validate.Struct(test)
-
+	Equal(t, errs, nil)
-	if errs != nil {
-		t.Fatalf("failed Error: %s", errs)
-	}
 
 	test2 := struct {
-		Field1 string            `validate:"omitempty" json:"field_1"`
+		Inner  *Inner
+		Inner2 *Inner
+		Field1 string            `json:"field_1"`
 		Field2 *string           `validate:"required_without=Field1" json:"field_2"`
 		Field3 map[string]string `validate:"required_without=Field2" json:"field_3"`
 		Field4 interface{}       `validate:"required_without=Field3" json:"field_4"`
 		Field5 string            `validate:"required_without=Field3" json:"field_5"`
 		Field6 string            `validate:"required_without=Field1" json:"field_6"`
+		Field7 string            `validate:"required_without=Inner.Field" json:"field_7"`
+		Field8 string            `validate:"required_without=Inner.Field" json:"field_8"`
 	}{
+		Inner:  &Inner{},
 		Field3: map[string]string{"key": "val"},
 		Field4: "test",
 		Field5: "test",
 	}
 
 	errs = validate.Struct(&test2)
+	NotEqual(t, errs, nil)
 
-	if errs == nil {
+	ve := errs.(ValidationErrors)
-		t.Fatalf("failed Error: %s", errs)
+	Equal(t, len(ve), 4)
-	}
+	AssertError(t, errs, "Field2", "Field2", "Field2", "Field2", "required_without")
+	AssertError(t, errs, "Field6", "Field6", "Field6", "Field6", "required_without")
+	AssertError(t, errs, "Field7", "Field7", "Field7", "Field7", "required_without")
+	AssertError(t, errs, "Field8", "Field8", "Field8", "Field8", "required_without")
 }
 
 func TestRequiredWithoutAll(t *testing.T) {
@@ -8739,10 +8803,7 @@ func TestRequiredWithoutAll(t *testing.T) {
 	validate := New()
 
 	errs := validate.Struct(test)
-
+	Equal(t, errs, nil)
-	if errs != nil {
-		t.Fatalf("failed Error: %s", errs)
-	}
 
 	test2 := struct {
 		Field1 string            `validate:"omitempty" json:"field_1"`
@@ -8750,7 +8811,7 @@ func TestRequiredWithoutAll(t *testing.T) {
 		Field3 map[string]string `validate:"required_without_all=Field2" json:"field_3"`
 		Field4 interface{}       `validate:"required_without_all=Field3" json:"field_4"`
 		Field5 string            `validate:"required_without_all=Field3" json:"field_5"`
-		Field6 string            `validate:"required_without_all=Field1" json:"field_6"`
+		Field6 string            `validate:"required_without_all=Field1 Field3" json:"field_6"`
 	}{
 		Field3: map[string]string{"key": "val"},
 		Field4: "test",
@@ -8758,8 +8819,48 @@ func TestRequiredWithoutAll(t *testing.T) {
 	}
 
 	errs = validate.Struct(test2)
+	NotEqual(t, errs, nil)
 
-	if errs == nil {
+	ve := errs.(ValidationErrors)
-		t.Fatalf("failed Error: %s", errs)
+	Equal(t, len(ve), 1)
+	AssertError(t, errs, "Field2", "Field2", "Field2", "Field2", "required_without_all")
+}
+
+func TestLookup(t *testing.T) {
+	type Lookup struct {
+		FieldA *string `json:"fieldA,omitempty" validate:"required_without=FieldB"`
+		FieldB *string `json:"fieldB,omitempty" validate:"required_without=FieldA"`
+	}
+
+	fieldAValue := "1232"
+	lookup := Lookup{
+		FieldA: &fieldAValue,
+		FieldB: nil,
 	}
+	Equal(t, New().Struct(lookup), nil)
+}
+
+func TestAbilityToValidateNils(t *testing.T) {
+
+	type TestStruct struct {
+		Test *string `validate:"nil"`
+	}
+
+	ts := TestStruct{}
+	val := New()
+	fn := func(fl FieldLevel) bool {
+		return fl.Field().Kind() == reflect.Ptr && fl.Field().IsNil()
+	}
+
+	err := val.RegisterValidation("nil", fn, true)
+	Equal(t, err, nil)
+
+	errs := val.Struct(ts)
+	Equal(t, errs, nil)
+
+	str := "string"
+	ts.Test = &str
+
+	errs = val.Struct(ts)
+	NotEqual(t, errs, nil)
 }