refactor: enable ClosureReturnTypeRector

rector.php

@@ -53,6 +53,7 @@
 use Rector\TypeDeclaration\Rector\ClassMethod\AddMethodCallBasedStrictParamTypeRector;
 use Rector\TypeDeclaration\Rector\ClassMethod\ReturnNeverTypeRector;
 use Rector\TypeDeclaration\Rector\Closure\AddClosureVoidReturnTypeWhereNoReturnRector;
+use Rector\TypeDeclaration\Rector\Closure\ClosureReturnTypeRector;
 use Rector\TypeDeclaration\Rector\Empty_\EmptyOnNullableObjectToInstanceOfRector;
 use Rector\TypeDeclaration\Rector\Function_\AddFunctionVoidReturnTypeWhereNoReturnRector;
 use Rector\TypeDeclaration\Rector\Property\TypedPropertyFromAssignsRector;
@@ -217,6 +218,7 @@
         AddFunctionVoidReturnTypeWhereNoReturnRector::class,
         AddMethodCallBasedStrictParamTypeRector::class,
         TypedPropertyFromAssignsRector::class,
+        ClosureReturnTypeRector::class,
     ])
     ->withConfiguredRule(StringClassNameToClassConstantRector::class, [
         // keep '\\' prefix string on string '\Foo\Bar'

system/Database/OCI8/Builder.php

@@ -109,12 +109,12 @@ protected function _replace(string $table, array $keys, array $values): string
     {
         $fieldNames = array_map(static fn ($columnName) => trim($columnName, '"'), $keys);
 
-        $uniqueIndexes = array_filter($this->db->getIndexData($table), static function ($index) use ($fieldNames) {
+        $uniqueIndexes = array_filter($this->db->getIndexData($table), static function ($index) use ($fieldNames): bool {
             $hasAllFields = count(array_intersect($index->fields, $fieldNames)) === count($index->fields);
 
             return ($index->type === 'PRIMARY') && $hasAllFields;
         });
-        $replaceableFields = array_filter($keys, static function ($columnName) use ($uniqueIndexes) {
+        $replaceableFields = array_filter($keys, static function ($columnName) use ($uniqueIndexes): bool {
             foreach ($uniqueIndexes as $index) {
                 if (in_array(trim($columnName, '"'), $index->fields, true)) {
                     return false;
@@ -344,7 +344,7 @@ protected function _upsertBatch(string $table, array $keys, array $values): stri
             if (empty($constraints)) {
                 $fieldNames = array_map(static fn ($columnName) => trim($columnName, '"'), $keys);
 
-                $uniqueIndexes = array_filter($this->db->getIndexData($table), static function ($index) use ($fieldNames) {
+                $uniqueIndexes = array_filter($this->db->getIndexData($table), static function ($index) use ($fieldNames): bool {
                     $hasAllFields = count(array_intersect($index->fields, $fieldNames)) === count($index->fields);
 
                     return ($index->type === 'PRIMARY' || $index->type === 'UNIQUE') && $hasAllFields;

system/Database/OCI8/PreparedQuery.php

@@ -113,7 +113,7 @@ public function parameterize(string $sql): string
         // Track our current value
         $count = 0;
 
-        return preg_replace_callback('/\?/', static function ($matches) use (&$count) {
+        return preg_replace_callback('/\?/', static function ($matches) use (&$count): string {
             return ':' . ($count++);
         }, $sql);
     }

system/Database/Postgre/Builder.php

@@ -368,7 +368,7 @@ protected function _updateBatch(string $table, array $keys, array $values): stri
             $sql .= 'WHERE ' . implode(
                 ' AND ',
                 array_map(
-                    static function ($key, $value) use ($table, $alias, $that) {
+                    static function ($key, $value) use ($table, $alias, $that): string|RawSql {
                         if ($value instanceof RawSql && is_string($key)) {
                             return $table . '.' . $key . ' = ' . $value;
                         }
@@ -463,7 +463,7 @@ protected function _upsertBatch(string $table, array $keys, array $values): stri
             $constraints = $this->QBOptions['constraints'] ?? [];
 
             if (empty($constraints)) {
-                $allIndexes = array_filter($this->db->getIndexData($table), static function ($index) use ($fieldNames) {
+                $allIndexes = array_filter($this->db->getIndexData($table), static function ($index) use ($fieldNames): bool {
                     $hasAllFields = count(array_intersect($index->fields, $fieldNames)) === count($index->fields);
 
                     return ($index->type === 'UNIQUE' || $index->type === 'PRIMARY') && $hasAllFields;
@@ -575,7 +575,7 @@ protected function _deleteBatch(string $table, array $keys, array $values): stri
             $sql .= 'WHERE ' . implode(
                 ' AND ',
                 array_map(
-                    static function ($key, $value) use ($table, $alias, $that) {
+                    static function ($key, $value) use ($table, $alias, $that): RawSql|string {
                         if ($value instanceof RawSql) {
                             return $value;
                         }

system/Database/Postgre/PreparedQuery.php

@@ -119,7 +119,7 @@ public function parameterize(string $sql): string
         // Track our current value
         $count = 0;
 
-        return preg_replace_callback('/\?/', static function () use (&$count) {
+        return preg_replace_callback('/\?/', static function () use (&$count): string {
             $count++;
 
             return "\${$count}";

system/Database/SQLSRV/Builder.php

@@ -699,15 +699,15 @@ protected function _upsertBatch(string $table, array $keys, array $values): stri
             if (empty($constraints)) {
                 $tableIndexes = $this->db->getIndexData($table);
 
-                $uniqueIndexes = array_filter($tableIndexes, static function ($index) use ($fieldNames) {
+                $uniqueIndexes = array_filter($tableIndexes, static function ($index) use ($fieldNames): bool {
                     $hasAllFields = count(array_intersect($index->fields, $fieldNames)) === count($index->fields);
 
                     return $index->type === 'PRIMARY' && $hasAllFields;
                 });
 
                 // if no primary found then look for unique - since indexes have no order
                 if ($uniqueIndexes === []) {
-                    $uniqueIndexes = array_filter($tableIndexes, static function ($index) use ($fieldNames) {
+                    $uniqueIndexes = array_filter($tableIndexes, static function ($index) use ($fieldNames): bool {
                         $hasAllFields = count(array_intersect($index->fields, $fieldNames)) === count($index->fields);
 
                         return $index->type === 'UNIQUE' && $hasAllFields;

system/Database/SQLite3/Builder.php

@@ -145,7 +145,7 @@ protected function _upsertBatch(string $table, array $keys, array $values): stri
             if (empty($constraints)) {
                 $fieldNames = array_map(static fn ($columnName) => trim($columnName, '`'), $keys);
 
-                $allIndexes = array_filter($this->db->getIndexData($table), static function ($index) use ($fieldNames) {
+                $allIndexes = array_filter($this->db->getIndexData($table), static function ($index) use ($fieldNames): bool {
                     $hasAllFields = count(array_intersect($index->fields, $fieldNames)) === count($index->fields);
 
                     return ($index->type === 'PRIMARY' || $index->type === 'UNIQUE') && $hasAllFields;

system/Debug/Toolbar/Collectors/Database.php

@@ -148,7 +148,7 @@ protected function formatTimelineData(): array
     public function display(): array
     {
         $data            = [];
-        $data['queries'] = array_map(static function (array $query) {
+        $data['queries'] = array_map(static function (array $query): array {
             $isDuplicate = $query['duplicate'] === true;
 
             $firstNonSystemLine = '';

system/Events/Events.php

@@ -84,7 +84,7 @@ public static function initialize()
             $files = service('locator')->search('Config/Events.php');
         }
 
-        $files = array_filter(array_map(static function (string $file) {
+        $files = array_filter(array_map(static function (string $file): false|string {
             if (is_file($file)) {
                 return realpath($file) ?: $file;
             }

system/HTTP/ContentSecurityPolicy.php

@@ -713,7 +713,7 @@ protected function generateNonces(ResponseInterface $response)
         $pattern = '/(' . preg_quote($this->styleNonceTag, '/')
             . '|' . preg_quote($this->scriptNonceTag, '/') . ')/';
 
-        $body = preg_replace_callback($pattern, function ($match) {
+        $body = preg_replace_callback($pattern, function ($match): string {
             $nonce = $match[0] === $this->styleNonceTag ? $this->getStyleNonce() : $this->getScriptNonce();
 
             return "nonce=\"{$nonce}\"";

system/HTTP/Negotiate.php

@@ -233,7 +233,7 @@ public function parseHeader(string $header): array
         }
 
         // Sort to get the highest results first
-        usort($results, static function ($a, $b) {
+        usort($results, static function ($a, $b): int {
             if ($a['q'] === $b['q']) {
                 $aAst = substr_count($a['value'], '*');
                 $bAst = substr_count($b['value'], '*');

system/Helpers/Array/ArrayHelper.php

@@ -307,7 +307,7 @@ public static function recursiveCount(array $array, int $counter = 0): int
      */
     public static function sortValuesByNatural(array &$array, $sortByIndex = null): bool
     {
-        return usort($array, static function ($currentValue, $nextValue) use ($sortByIndex) {
+        return usort($array, static function ($currentValue, $nextValue) use ($sortByIndex): int {
             if ($sortByIndex !== null) {
                 return strnatcmp((string) $currentValue[$sortByIndex], (string) $nextValue[$sortByIndex]);
             }

system/Router/Router.php

@@ -433,7 +433,7 @@ protected function checkRoutes(string $uri): bool
                 // Is this route supposed to redirect to another?
                 if ($this->collection->isRedirect($routeKey)) {
                     // replacing matched route groups with references: post/([0-9]+) -> post/$1
-                    $redirectTo = preg_replace_callback('/(\([^\(]+\))/', static function () {
+                    $redirectTo = preg_replace_callback('/(\([^\(]+\))/', static function (): string {
                         static $i = 1;
 
                         return '$' . $i++;

system/View/Parser.php

@@ -534,7 +534,7 @@ protected function replaceSingle($pattern, $content, $template, bool $escape = f
         $content = (string) $content;
 
         // Replace the content in the template
-        return preg_replace_callback($pattern, function ($matches) use ($content, $escape) {
+        return preg_replace_callback($pattern, function ($matches) use ($content, $escape): string {
             // Check for {! !} syntax to not escape this one.
             if (
                 str_starts_with($matches[0], $this->leftDelimiter . '!')

tests/system/Commands/Utilities/NamespacesTest.php

@@ -42,7 +42,7 @@ protected function tearDown(): void
      */
     protected function getBuffer()
     {
-        return preg_replace_callback('/(\|\s*[^|]+\s*\|\s*)(.*?)(\s*\|\s*[^|]+\s*\|)/', static function (array $matches) {
+        return preg_replace_callback('/(\|\s*[^|]+\s*\|\s*)(.*?)(\s*\|\s*[^|]+\s*\|)/', static function (array $matches): string {
             $matches[2] = str_replace(DIRECTORY_SEPARATOR, '/', $matches[2]);
 
             return $matches[1] . $matches[2] . $matches[3];

tests/system/DataConverter/DataConverterTest.php

@@ -570,7 +570,7 @@ public function testReconstructObjectWithClosure(): void
             'created_at' => 'datetime',
             'updated_at' => 'datetime',
         ];
-        $reconstructor = static function ($array) {
+        $reconstructor = static function ($array): User {
             $user = new User();
             $user->fill($array);
 
@@ -667,7 +667,7 @@ public function testExtractWithClosure(): void
             'created_at' => 'datetime',
             'updated_at' => 'datetime',
         ];
-        $extractor = static function ($obj) {
+        $extractor = static function ($obj): array {
             $array['id']         = $obj->id;
             $array['name']       = $obj->name;
             $array['created_at'] = $obj->created_at;

tests/system/Debug/TimerTest.php

@@ -144,7 +144,7 @@ public function testRecordFunctionNoReturn(): void
     public function testRecordFunctionWithReturn(): void
     {
         $timer       = new Timer();
-        $returnValue = $timer->record('longjohn', static function () {
+        $returnValue = $timer->record('longjohn', static function (): string {
             usleep(100000);
 
             return 'test';

tests/system/Events/EventsTest.php

@@ -121,7 +121,7 @@ public function testCancelEvent(): void
 
         // This should cancel the flow of events, and leave
         // $result = 1.
-        Events::on('foo', static function ($arg) use (&$result) {
+        Events::on('foo', static function ($arg) use (&$result): bool {
             $result = 1;
 
             return false;
@@ -138,14 +138,14 @@ public function testPriority(): void
     {
         $result = 0;
 
-        Events::on('foo', static function () use (&$result) {
+        Events::on('foo', static function () use (&$result): bool {
             $result = 1;
 
             return false;
         }, EVENT_PRIORITY_NORMAL);
         // Since this has a higher priority, it will
         // run first.
-        Events::on('foo', static function () use (&$result) {
+        Events::on('foo', static function () use (&$result): bool {
             $result = 2;
 
             return false;

tests/system/Test/FeatureTestTraitTest.php

@@ -152,7 +152,7 @@ public function testCallValidationTwice(): void
             [
                 'POST',
                 'section/create',
-                static function () {
+                static function (): string {
                     $validation = Services::validation();
                     $validation->setRule('title', 'title', 'required|min_length[3]');
 

tests/system/Validation/ValidationTest.php

@@ -311,7 +311,7 @@ public function testClosureRuleWithParamError(): void
         $this->validation->setRules([
             'foo' => [
                 'required',
-                static function ($value, $data, &$error, $field) {
+                static function ($value, $data, &$error, $field): bool {
                     if ($value !== 'abc') {
                         $error = 'The ' . $field . ' value is not "abc"';
 

tests/system/View/ParserTest.php

@@ -806,7 +806,7 @@ public function testParserPluginClosure(): void
 
     public function testParserPluginParams(): void
     {
-        $this->parser->addPlugin('growth', static function ($str, array $params) {
+        $this->parser->addPlugin('growth', static function ($str, array $params): string {
             $step  = $params['step'] ?? 1;
             $count = $params['count'] ?? 2;
 
@@ -853,7 +853,7 @@ public function testParserSingleTagWithSingleParams(): void
 
     public function testParserSingleTagWithQuotedParams(): void
     {
-        $this->parser->addPlugin('count', static function (array $params = []) {
+        $this->parser->addPlugin('count', static function (array $params = []): string {
             $out = '';
 
             foreach ($params as $index => $param) {
@@ -870,7 +870,7 @@ public function testParserSingleTagWithQuotedParams(): void
 
     public function testParserSingleTagWithNamedParams(): void
     {
-        $this->parser->addPlugin('read_params', static function (array $params = []) {
+        $this->parser->addPlugin('read_params', static function (array $params = []): string {
             $out = '';
 
             foreach ($params as $index => $param) {