Validator : null also possible for valid default value

src/CliProgram/Validation/Validators/DateTimeValidator.php

@@ -29,7 +29,7 @@ class DateTimeValidator extends AbstractDateTimeValidator {
     /**
      * @inheritDoc
      */
-    public function getValidDefault (mixed $default): string|bool|int|float|array {
+    public function getValidDefault (mixed $default): string|bool|int|float|array|null {
         if ($default instanceof DateTimeInterface) {
             return $default->format('Y-m-d H:i:s');
         }

src/CliProgram/Validation/Validators/DateValidator.php

@@ -29,7 +29,7 @@ class DateValidator extends AbstractDateTimeValidator {
     /**
      * @inheritDoc
      */
-    public function getValidDefault (mixed $default): string|bool|int|float|array {
+    public function getValidDefault (mixed $default): string|bool|int|float|array|null {
         if ($default instanceof DateTimeInterface) {
             return $default->format('Y-m-d');
         }

src/CliProgram/Validation/Validators/EnumValidator.php

@@ -43,7 +43,7 @@ class EnumValidator extends BasedValidator {
      *
      * @throws ReflectionException
      */
-    public function getValidDefault (mixed $default): string|bool|int|float|array {
+    public function getValidDefault (mixed $default): string|bool|int|float|array|null {
         if ($default instanceof UnitEnum) {
             $default = $default->name;
         }

src/CliProgram/Validation/Validators/IValidator.php

@@ -13,9 +13,9 @@ interface IValidator {
      *
      * @param mixed $default The initial/given default value
      *
-     * @return string|bool|int|float|array The valid default value
+     * @return string|bool|int|float|array|null The valid default value
      */
-    public function getValidDefault (mixed $default): string|bool|int|float|array;
+    public function getValidDefault (mixed $default): string|bool|int|float|array|null;
 
     /**
      * Validate a value

src/CliProgram/Validation/Validators/TIdenticalValidDefaultValidator.php

@@ -11,7 +11,7 @@ trait TIdenticalValidDefaultValidator {
     /**
      * @inheritDoc
      */
-    public function getValidDefault (mixed $default): string|bool|int|float|array {
+    public function getValidDefault (mixed $default): string|bool|int|float|array|null {
         return $default;
     }
 }

src/CliProgram/Validation/Validators/TimeValidator.php

@@ -29,7 +29,7 @@ class TimeValidator extends AbstractDateTimeValidator {
     /**
      * @inheritDoc
      */
-    public function getValidDefault (mixed $default): string|bool|int|float|array {
+    public function getValidDefault (mixed $default): string|bool|int|float|array|null {
         if ($default instanceof DateTimeInterface) {
             return $default->format('H:i:s');
         }