Mark nullable parameters as nullable

src/EasyStatement.php

@@ -420,7 +420,7 @@ public function __toString(): string
      * EasyStatement constructor.
      * @param EasyStatement|null $parent
      */
-    protected function __construct(EasyStatement $parent = null)
+    protected function __construct(?EasyStatement $parent = null)
     {
         $this->parent = $parent;
     }

src/Exception/MustBeArrayOrEasyStatement.php

@@ -4,6 +4,7 @@
 
 use ParagonIE\Corner\CornerInterface;
 use ParagonIE\Corner\CornerTrait;
+use Throwable;
 
 /**
  * Class MustBeArrayOrEasyStatement
@@ -13,7 +14,7 @@ class MustBeArrayOrEasyStatement extends EasyDBException
 {
     use CornerTrait;
 
-    public function __construct(string $message = "", int $code = 0, \Throwable $previous = null)
+    public function __construct(string $message = "", int $code = 0, ?Throwable $previous = null)
     {
         parent::__construct($message, $code, $previous);
         $this->supportLink = 'https://github.com/paragonie/easydb';

src/Exception/MustBeEmpty.php

@@ -4,12 +4,13 @@
 
 use ParagonIE\Corner\CornerInterface;
 use ParagonIE\Corner\CornerTrait;
+use Throwable;
 
 class MustBeEmpty extends EasyDBException
 {
     use CornerTrait;
 
-    public function __construct(string $message = "", int $code = 0, \Throwable $previous = null)
+    public function __construct(string $message = "", int $code = 0, ?Throwable $previous = null)
     {
         parent::__construct($message, $code, $previous);
         $this->supportLink = 'https://github.com/paragonie/easydb';

src/Exception/MustBeNonEmpty.php

@@ -4,6 +4,7 @@
 
 use ParagonIE\Corner\CornerInterface;
 use ParagonIE\Corner\CornerTrait;
+use Throwable;
 
 /**
  * Class MustBeNonEmpty
@@ -13,7 +14,7 @@ class MustBeNonEmpty extends EasyDBException
 {
     use CornerTrait;
 
-    public function __construct(string $message = "", int $code = 0, \Throwable $previous = null)
+    public function __construct(string $message = "", int $code = 0, ?Throwable $previous = null)
     {
         parent::__construct($message, $code, $previous);
         $this->supportLink = 'https://github.com/paragonie/easydb';
@@ -29,7 +30,5 @@ public function __construct(string $message = "", int $code = 0, \Throwable $pre
 Note that an empty IN statement yields an empty result. If you want it to fail
 open (a.k.a. discard the IN() statement entirely), you'll need to implement
 your own application logic to handle this behavior.";
-
-
     }
 }

src/Exception/MustBeOneDimensionalArray.php

@@ -14,7 +14,7 @@ class MustBeOneDimensionalArray extends EasyDBException
 {
     use CornerTrait;
 
-    public function __construct(string $message = "", int $code = 0, Throwable $previous = null)
+    public function __construct(string $message = "", int $code = 0, ?Throwable $previous = null)
     {
         parent::__construct($message, $code, $previous);
         $this->supportLink = 'https://github.com/paragonie/easydb#only-one-dimensional-arrays-are-allowed';

src/Factory.php

@@ -35,8 +35,8 @@ abstract class Factory
      */
     public static function create(
         string $dsn,
-        string $username = null,
-        string $password = null,
+        ?string $username = null,
+        ?string $password = null,
         array $options = []
     ): EasyDB {
         return static::fromArray([$dsn, $username, $password, $options]);