Tighten up types and initialization for private properties and methods.

phpstan.neon.dist

@@ -18,5 +18,4 @@ parameters:
     - src/Util/Str.php
   bootstrapFiles:
     - vendor-bin/phpstan/bootstrap.php
-  checkMissingIterableValueType: false
   reportUnmatchedIgnoredErrors: true

src/CodeCleaner.php

@@ -48,13 +48,13 @@
  */
 class CodeCleaner
 {
-    private $yolo = false;
-    private $strictTypes = false;
+    private bool $yolo = false;
+    private bool $strictTypes = false;
 
-    private $parser;
-    private $printer;
-    private $traverser;
-    private $namespace;
+    private Parser $parser;
+    private Printer $printer;
+    private NodeTraverser $traverser;
+    private ?array $namespace = null;
 
     /**
      * CodeCleaner constructor.
@@ -259,8 +259,6 @@ public function clean(array $codeLines, bool $requireSemicolons = false)
 
     /**
      * Set the current local namespace.
-     *
-     * @param array|null $namespace (default: null)
      */
     public function setNamespace(?array $namespace = null)
     {
@@ -285,9 +283,6 @@ public function getNamespace()
      * @throws ParseErrorException for parse errors that can't be resolved by
      *                             waiting a line to see what comes next
      *
-     * @param string $code
-     * @param bool   $requireSemicolons
-     *
      * @return array|false A set of statements, or false if incomplete
      */
     protected function parse(string $code, bool $requireSemicolons = false)
@@ -337,9 +332,6 @@ private function parseErrorIsEOF(\PhpParser\Error $e): bool
      * Unlike (all?) other unclosed statements, single quoted strings have
      * their own special beautiful snowflake syntax error just for
      * themselves.
-     *
-     * @param \PhpParser\Error $e
-     * @param string           $code
      */
     private function parseErrorIsUnclosedString(\PhpParser\Error $e, string $code): bool
     {
@@ -356,12 +348,12 @@ private function parseErrorIsUnclosedString(\PhpParser\Error $e, string $code):
         return true;
     }
 
-    private function parseErrorIsUnterminatedComment(\PhpParser\Error $e, $code): bool
+    private function parseErrorIsUnterminatedComment(\PhpParser\Error $e, string $code): bool
     {
         return $e->getRawMessage() === 'Unterminated comment';
     }
 
-    private function parseErrorIsTrailingComma(\PhpParser\Error $e, $code): bool
+    private function parseErrorIsTrailingComma(\PhpParser\Error $e, string $code): bool
     {
         return ($e->getRawMessage() === 'A trailing comma is not allowed here') && (\substr(\rtrim($code), -1) === ',');
     }

src/CodeCleaner/AbstractClassPass.php

@@ -21,8 +21,8 @@
  */
 class AbstractClassPass extends CodeCleanerPass
 {
-    private $class;
-    private $abstractMethods;
+    private Class_ $class;
+    private array $abstractMethods;
 
     /**
      * @throws FatalErrorException if the node is an abstract function with a body

src/CodeCleaner/CalledClassPass.php

@@ -26,7 +26,7 @@
  */
 class CalledClassPass extends CodeCleanerPass
 {
-    private $inClass;
+    private bool $inClass = false;
 
     /**
      * @param array $nodes

src/CodeCleaner/EmptyArrayDimFetchPass.php

@@ -25,7 +25,7 @@ class EmptyArrayDimFetchPass extends CodeCleanerPass
 {
     const EXCEPTION_MESSAGE = 'Cannot use [] for reading';
 
-    private $theseOnesAreFine = [];
+    private array $theseOnesAreFine = [];
 
     /**
      * @return Node[]|null Array of nodes

src/CodeCleaner/FinalClassPass.php

@@ -20,7 +20,7 @@
  */
 class FinalClassPass extends CodeCleanerPass
 {
-    private $finalClasses;
+    private array $finalClasses = [];
 
     /**
      * @param array $nodes

src/CodeCleaner/FunctionContextPass.php

@@ -18,8 +18,7 @@
 
 class FunctionContextPass extends CodeCleanerPass
 {
-    /** @var int */
-    private $functionDepth;
+    private int $functionDepth = 0;
 
     /**
      * @param array $nodes

src/CodeCleaner/LabelContextPass.php

@@ -31,13 +31,9 @@
  */
 class LabelContextPass extends CodeCleanerPass
 {
-    /** @var int */
-    private $functionDepth;
-
-    /** @var array */
-    private $labelDeclarations;
-    /** @var array */
-    private $labelGotos;
+    private int $functionDepth = 0;
+    private array $labelDeclarations = [];
+    private array $labelGotos = [];
 
     /**
      * @param array $nodes

src/CodeCleaner/LoopContextPass.php

@@ -30,7 +30,7 @@
  */
 class LoopContextPass extends CodeCleanerPass
 {
-    private $loopDepth;
+    private int $loopDepth = 0;
 
     /**
      * {@inheritdoc}

src/CodeCleaner/NamespaceAwarePass.php

@@ -21,8 +21,8 @@
  */
 abstract class NamespaceAwarePass extends CodeCleanerPass
 {
-    protected $namespace;
-    protected $currentScope;
+    protected array $namespace = [];
+    protected array $currentScope = [];
 
     /**
      * @todo should this be final? Extending classes should be sure to either

src/CodeCleaner/NamespacePass.php

@@ -29,8 +29,8 @@
  */
 class NamespacePass extends CodeCleanerPass
 {
-    private $namespace = null;
-    private $cleaner;
+    private ?Name $namespace = null;
+    private CodeCleaner $cleaner;
 
     /**
      * @param CodeCleaner $cleaner
@@ -83,7 +83,7 @@ public function beforeTraverse(array $nodes)
      *
      * @param Name|null $namespace
      */
-    private function setNamespace($namespace)
+    private function setNamespace(?Name $namespace)
     {
         $this->namespace = $namespace;
         $this->cleaner->setNamespace($namespace === null ? null : $this->getParts($namespace));

src/CodeCleaner/RequirePass.php

@@ -26,7 +26,7 @@
  */
 class RequirePass extends CodeCleanerPass
 {
-    private static $requireTypes = [Include_::TYPE_REQUIRE, Include_::TYPE_REQUIRE_ONCE];
+    private const REQUIRE_TYPES = [Include_::TYPE_REQUIRE, Include_::TYPE_REQUIRE_ONCE];
 
     /**
      * {@inheritdoc}
@@ -125,7 +125,7 @@ public static function resolve($file, $startLine = null): string
 
     private function isRequireNode(Node $node): bool
     {
-        return $node instanceof Include_ && \in_array($node->type, self::$requireTypes);
+        return $node instanceof Include_ && \in_array($node->type, self::REQUIRE_TYPES);
     }
 
     private static function getIncludePath(): array

src/CodeCleaner/ReturnTypePass.php

@@ -34,7 +34,7 @@ class ReturnTypePass extends CodeCleanerPass
     const VOID_NULL_MESSAGE = 'A void function must not return a value (did you mean "return;" instead of "return null;"?)';
     const NULLABLE_VOID_MESSAGE = 'Void type cannot be nullable';
 
-    private $returnTypeStack = [];
+    private array $returnTypeStack = [];
 
     /**
      * {@inheritdoc}

src/CodeCleaner/StrictTypesPass.php

@@ -33,7 +33,7 @@ class StrictTypesPass extends CodeCleanerPass
 {
     const EXCEPTION_MESSAGE = 'strict_types declaration must have 0 or 1 as its value';
 
-    private $strictTypes = false;
+    private bool $strictTypes;
 
     /**
      * @param bool $strictTypes enforce strict types by default

src/CodeCleaner/UseStatementPass.php

@@ -33,9 +33,9 @@
  */
 class UseStatementPass extends CodeCleanerPass
 {
-    private $aliases = [];
-    private $lastAliases = [];
-    private $lastNamespace = null;
+    private array $aliases = [];
+    private array $lastAliases = [];
+    private ?Name $lastNamespace = null;
 
     /**
      * Re-load the last set of use statements on re-entering a namespace.

src/CodeCleaner/ValidClassNamePass.php

@@ -36,7 +36,7 @@ class ValidClassNamePass extends NamespaceAwarePass
     const INTERFACE_TYPE = 'interface';
     const TRAIT_TYPE = 'trait';
 
-    private $conditionalScopes = 0;
+    private int $conditionalScopes = 0;
 
     /**
      * Validate class, interface and trait definitions.

src/CodeCleaner/ValidConstructorPass.php

@@ -33,7 +33,7 @@
  */
 class ValidConstructorPass extends CodeCleanerPass
 {
-    private $namespace;
+    private array $namespace = [];
 
     /**
      * @return Node[]|null Array of nodes

src/CodeCleaner/ValidFunctionNamePass.php

@@ -27,7 +27,7 @@
  */
 class ValidFunctionNamePass extends NamespaceAwarePass
 {
-    private $conditionalScopes = 0;
+    private int $conditionalScopes = 0;
 
     /**
      * Store newly defined function names on the way in, to allow recursion.

src/Command/BufferCommand.php

@@ -11,7 +11,6 @@
 
 namespace Psy\Command;
 
-use Psy\Exception\RuntimeException;
 use Psy\Output\ShellOutput;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
@@ -52,14 +51,11 @@ protected function configure()
      */
     protected function execute(InputInterface $input, OutputInterface $output): int
     {
-        $app = $this->getApplication();
-        if (!$app instanceof \Psy\Shell) {
-            throw new RuntimeException('Buffer command requires a \Psy\Shell application');
-        }
+        $shell = $this->getShell();
 
-        $buf = $app->getCodeBuffer();
+        $buf = $shell->getCodeBuffer();
         if ($input->getOption('clear')) {
-            $app->resetCodeBuffer();
+            $shell->resetCodeBuffer();
             $output->writeln($this->formatLines($buf, 'urgent'), ShellOutput::NUMBER_LINES);
         } else {
             $output->writeln($this->formatLines($buf), ShellOutput::NUMBER_LINES);

src/Command/CodeArgumentParser.php

@@ -20,7 +20,7 @@
  */
 class CodeArgumentParser
 {
-    private $parser;
+    private Parser $parser;
 
     public function __construct(?Parser $parser = null)
     {

src/Command/Command.php

@@ -39,6 +39,19 @@ public function setApplication(?Application $application = null): void
         parent::setApplication($application);
     }
 
+    /**
+     * getApplication, but is guaranteed to return a Shell instance.
+     */
+    protected function getShell(): Shell
+    {
+        $shell = $this->getApplication();
+        if (!$shell instanceof Shell) {
+            throw new \RuntimeException('PsySH Commands require an instance of Psy\Shell');
+        }
+
+        return $shell;
+    }
+
     /**
      * {@inheritdoc}
      */

src/Command/DocCommand.php

@@ -73,7 +73,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
             $doc = $this->getManualDoc($reflector) ?: DocblockFormatter::format($reflector);
         }
 
-        $db = $this->getApplication()->getManualDb();
+        $db = $this->getShell()->getManualDb();
 
         if ($output instanceof ShellOutput) {
             $output->startPaging();
@@ -242,7 +242,7 @@ private function getParentReflectors($reflector): \Generator
 
     private function getManualDocById($id)
     {
-        if ($db = $this->getApplication()->getManualDb()) {
+        if ($db = $this->getShell()->getManualDb()) {
             $result = $db->query(\sprintf('SELECT doc FROM php_manual WHERE id = %s', $db->quote($id)));
             if ($result !== false) {
                 return $result->fetchColumn(0);

src/Command/DumpCommand.php

@@ -11,7 +11,9 @@
 
 namespace Psy\Command;
 
+use Psy\Exception\RuntimeException;
 use Psy\Input\CodeArgument;
+use Psy\Output\ShellOutput;
 use Psy\VarDumper\Presenter;
 use Psy\VarDumper\PresenterAware;
 use Symfony\Component\Console\Input\InputInterface;
@@ -25,7 +27,7 @@
  */
 class DumpCommand extends ReflectingCommand implements PresenterAware
 {
-    private $presenter;
+    private Presenter $presenter;
 
     /**
      * PresenterAware interface.
@@ -71,6 +73,10 @@ protected function configure()
      */
     protected function execute(InputInterface $input, OutputInterface $output): int
     {
+        if (!$output instanceof ShellOutput) {
+            throw new RuntimeException('DumpCommand requires a ShellOutput');
+        }
+
         $depth = $input->getOption('depth');
         $target = $this->resolveCode($input->getArgument('target'));
         $output->page($this->presenter->present($target, $depth, $input->getOption('all') ? Presenter::VERBOSE : 0));

src/Command/EditCommand.php

@@ -20,15 +20,8 @@
 
 class EditCommand extends Command implements ContextAware
 {
-    /**
-     * @var string
-     */
-    private $runtimeDir = '';
-
-    /**
-     * @var Context
-     */
-    private $context;
+    private string $runtimeDir = '';
+    private Context $context;
 
     /**
      * Constructor.
@@ -104,7 +97,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         $editedContent = $this->editFile($filePath, $shouldRemoveFile);
 
         if ($execute) {
-            $this->getApplication()->addInput($editedContent);
+            $this->getShell()->addInput($editedContent);
         }
 
         return 0;

src/Command/HelpCommand.php

@@ -23,7 +23,7 @@
  */
 class HelpCommand extends Command
 {
-    private $command;
+    private ?Command $command = null;
 
     /**
      * {@inheritdoc}