added two new methods. CTag and CField for FieldLevel #282

cache.go

@@ -82,6 +82,16 @@ type cField struct {
 	cTags      *cTag
 }
 
+// Name return field name
+func (cf *cField) Name() string {
+	return cf.name
+}
+
+// AltName return field altname
+func (cf *cField) AltName() string {
+	return cf.altName
+}
+
 type cTag struct {
 	tag            string
 	aliasTag       string
@@ -94,6 +104,11 @@ type cTag struct {
 	next           *cTag
 }
 
+// Param return tag param
+func (ct *cTag) Param() string {
+	return ct.param
+}
+
 func (v *Validate) extractStructCache(current reflect.Value, sName string) *cStruct {
 
 	v.structCache.lock.Lock()

field_level.go

@@ -31,6 +31,10 @@ 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)
+	// return cache field
+	CField() *cField
+	// return cache tag
+	CTag() *cTag
 }
 
 var _ FieldLevel = new(validate)
@@ -49,3 +53,13 @@ func (v *validate) Param() string {
 func (v *validate) GetStructFieldOK() (reflect.Value, reflect.Kind, bool) {
 	return v.getStructFieldOKInternal(v.slflParent, v.flParam)
 }
+
+// Param returns cache field
+func (v *validate) CField() *cField {
+	return v.cf
+}
+
+// Param returns cache tag
+func (v *validate) CTag() *cTag {
+	return v.ct
+}

validator.go

@@ -25,7 +25,8 @@ type validate struct {
 	flField      reflect.Value
 	flParam      string
 	fldIsPointer bool
-
+	cf           *cField
+	ct           *cTag
 	// misc reusable values
 	misc []byte
 	str1 string
@@ -98,6 +99,8 @@ func (v *validate) validateStruct(parent reflect.Value, current reflect.Value, t
 // 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(parent reflect.Value, current reflect.Value, ns []byte, structNs []byte, cf *cField, ct *cTag) {
 
+	v.cf = cf
+	v.ct = ct
 	var typ reflect.Type
 	var kind reflect.Kind
 

validator_test.go

@@ -7013,3 +7013,41 @@ func TestMapStructNamespace(t *testing.T) {
 	Equal(t, len(ve), 1)
 	AssertError(t, errs, "children[1].name", "Children[1].Name", "name", "Name", "required")
 }
+
+func TestFieldLevel_CField(t *testing.T) {
+
+	validate := New()
+	validate.RegisterValidation("notEqualDesc", func(fl FieldLevel) bool {
+		return fl.CField().Name() != "Desc" // check field name is not Desc"
+	})
+
+	type Foo struct {
+		Desc string `json:"name" validate:"notEqualDesc"` // field name need not equal Desc
+	}
+
+	errs := validate.Struct(&Foo{})
+
+	NotEqual(t, errs, nil)
+
+	ve := errs.(ValidationErrors)
+	Equal(t, len(ve), 1)
+}
+
+func TestFieldLevel_CTag(t *testing.T) {
+
+	validate := New()
+	validate.RegisterValidation("fieldNameEqualParam", func(fl FieldLevel) bool {
+		return fl.CField().Name() == fl.CTag().Param() // check field name equal tag param"
+	})
+
+	type Foo struct {
+		Desc string `json:"name" validate:"fieldNameEqualParam=Asc"` // field name need equal tag param
+	}
+
+	errs := validate.Struct(&Foo{})
+
+	NotEqual(t, errs, nil)
+
+	ve := errs.(ValidationErrors)
+	Equal(t, len(ve), 1)
+}