fix: add missing datetimeFormat in rule registration

.github/workflows/tests.yml

@@ -11,8 +11,8 @@ jobs:
     name: lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-go@v5
+      - uses: actions/checkout@v6
+      - uses: actions/setup-go@v6
         with:
           go-version: '^1.24'
       - name: golangci-lint
@@ -23,7 +23,7 @@ jobs:
     needs: lint
     strategy:
       matrix:
-        go: ["1.18", "1.19", "1.20", "1.21", "1.22", "1.23", "1.24", "1.25"]
+        go: ["1.18", "1.19", "1.20", "1.21", "1.22", "1.23", "1.24", "1.25", "1.26"]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4

.gitignore

@@ -1,2 +1,3 @@
 coverage.out
 coverage.out.html
+CLAUDE.md

init.go

@@ -58,6 +58,7 @@ func registerDefaultRules() {
 		"dateTimeAfter":      &rules.DateTimeAfter{},
 		"dateTimeBefore":     &rules.DateTimeBefore{},
 		"dateTimeBetween":    &rules.DateTimeBetween{},
+		"dateTimeFormat":     &rules.DateTimeFormat{},
 		"different":          &rules.Different{},
 		"digits":             &rules.Digits{},
 		"digitsBetween":      &rules.DigitsBetween{},

rules/helpers.go

@@ -4,11 +4,11 @@ import "reflect"
 
 func indirectValue(a any) reflect.Value {
 	v := reflect.ValueOf(a)
-	if v.Kind() != reflect.Ptr {
+	if v.Kind() != reflect.Pointer {
 		return v
 	}
 
-	for v.Kind() == reflect.Ptr && !v.IsNil() {
+	for v.Kind() == reflect.Pointer && !v.IsNil() {
 		v = v.Elem()
 	}
 

validation.go

@@ -58,7 +58,7 @@ func ValidateStruct(input any, rulesMap RulesMap, locale ...string) Result {
 	}
 
 	v := reflect.ValueOf(input)
-	if v.Kind() != reflect.Struct && (v.Kind() != reflect.Ptr || v.Elem().Kind() != reflect.Struct) {
+	if v.Kind() != reflect.Struct && (v.Kind() != reflect.Pointer || v.Elem().Kind() != reflect.Struct) {
 		panic("validation.ValidateStruct only support struct or a pointer to a struct as first parameter")
 	}