Use ??= more

Author: nicolas-grekas

Caster/ExceptionCaster.php

@@ -352,9 +352,7 @@ private static function extractSource(string $srcLines, int $line, int $srcConte
             $pad = null;
             for ($i = $srcContext << 1; $i >= 0; --$i) {
                 if (isset($src[$i][$ltrim]) && "\r" !== ($c = $src[$i][$ltrim]) && "\n" !== $c) {
-                    if (null === $pad) {
-                        $pad = $c;
-                    }
+                    $pad ??= $c;
                     if ((' ' !== $c && "\t" !== $c) || $pad !== $c) {
                         break;
                     }

Caster/LinkStub.php

@@ -27,10 +27,7 @@ public function __construct(string $label, int $line = 0, string $href = null)
     {
         $this->value = $label;
 
-        if (null === $href) {
-            $href = $label;
-        }
-        if (!\is_string($href)) {
+        if (!\is_string($href ??= $label)) {
             return;
         }
         if (str_starts_with($href, 'file://')) {

Caster/SymfonyCaster.php

@@ -37,9 +37,7 @@ public static function castRequest(Request $request, array $a, Stub $stub, bool
         foreach (self::REQUEST_GETTERS as $prop => $getter) {
             $key = Caster::PREFIX_PROTECTED.$prop;
             if (\array_key_exists($key, $a) && null === $a[$key]) {
-                if (null === $clone) {
-                    $clone = clone $request;
-                }
+                $clone ??= clone $request;
                 $a[Caster::PREFIX_VIRTUAL.$prop] = $clone->{$getter}();
             }
         }

Cloner/AbstractCloner.php

@@ -216,10 +216,7 @@ abstract class AbstractCloner implements ClonerInterface
      */
     public function __construct(array $casters = null)
     {
-        if (null === $casters) {
-            $casters = static::$defaultCasters;
-        }
-        $this->addCasters($casters);
+        $this->addCasters($casters ?? static::$defaultCasters);
     }
 
     /**

Dumper/CliDumper.php

@@ -261,9 +261,7 @@ public function dumpString(Cursor $cursor, string $str, bool $bin, int $cut)
 
     public function enterHash(Cursor $cursor, int $type, string|int|null $class, bool $hasChild)
     {
-        if (null === $this->colors) {
-            $this->colors = $this->supportsColors();
-        }
+        $this->colors ??= $this->supportsColors();
 
         $this->dumpKey($cursor);
         $attr = $cursor->attr;
@@ -417,9 +415,7 @@ protected function dumpKey(Cursor $cursor)
      */
     protected function style(string $style, string $value, array $attr = []): string
     {
-        if (null === $this->colors) {
-            $this->colors = $this->supportsColors();
-        }
+        $this->colors ??= $this->supportsColors();
 
         $this->handlesHrefGracefully ??= 'JetBrains-JediTerm' !== getenv('TERMINAL_EMULATOR')
             && (!getenv('KONSOLE_VERSION') || (int) getenv('KONSOLE_VERSION') > 201100);