My first commit of codes

vendor/jeremeamia/SuperClosure/src/Analyzer/AstAnalyzer.php

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+<?php namespace SuperClosure\Analyzer;
+
+use SuperClosure\Analyzer\Visitor\ThisDetectorVisitor;
+use SuperClosure\Exception\ClosureAnalysisException;
+use SuperClosure\Analyzer\Visitor\ClosureLocatorVisitor;
+use SuperClosure\Analyzer\Visitor\MagicConstantVisitor;
+use PhpParser\NodeTraverser;
+use PhpParser\PrettyPrinter\Standard as NodePrinter;
+use PhpParser\Error as ParserError;
+use PhpParser\NodeVisitor\NameResolver;
+use PhpParser\Parser as CodeParser;
+use PhpParser\Lexer\Emulative as EmulativeLexer;
+
+/**
+ * This is the AST based analyzer.
+ *
+ * We're using reflection and AST-based code parser to analyze a closure and
+ * determine its code and context using the nikic/php-parser library. The AST
+ * based analyzer and has more capabilities than the token analyzer, but is,
+ * unfortunately, about 25 times slower.
+ */
+class AstAnalyzer extends ClosureAnalyzer
+{
+    protected function determineCode(array &$data)
+    {
+        // Find the closure by traversing through a AST of the code.
+        // Note: This also resolves class names to their FQCNs while traversing.
+        $this->locateClosure($data);
+
+        // Make a second pass through the AST, but only through the closure's
+        // nodes, to resolve any magic constants to literal values.
+        $traverser = new NodeTraverser;
+        $traverser->addVisitor(new MagicConstantVisitor($data['location']));
+        $traverser->addVisitor($thisDetector = new ThisDetectorVisitor);
+        $data['ast'] = $traverser->traverse([$data['ast']])[0];
+        $data['hasThis'] = $thisDetector->detected;
+
+        // Bounce the updated AST down to a string representation of the code.
+        $data['code'] = (new NodePrinter)->prettyPrint([$data['ast']]);
+    }
+
+    /**
+     * Parses the closure's code and produces an abstract syntax tree (AST).
+     *
+     * @param array $data
+     *
+     * @throws ClosureAnalysisException if there is an issue finding the closure
+     */
+    private function locateClosure(array &$data)
+    {
+        try {
+            $locator = new ClosureLocatorVisitor($data['reflection']);
+            $fileAst = $this->getFileAst($data['reflection']);
+
+            $fileTraverser = new NodeTraverser;
+            $fileTraverser->addVisitor(new NameResolver);
+            $fileTraverser->addVisitor($locator);
+            $fileTraverser->traverse($fileAst);
+        } catch (ParserError $e) {
+            // @codeCoverageIgnoreStart
+            throw new ClosureAnalysisException(
+                'There was an error analyzing the closure code.', 0, $e
+            );
+            // @codeCoverageIgnoreEnd
+        }
+
+        $data['ast'] = $locator->closureNode;
+        if (!$data['ast']) {
+            // @codeCoverageIgnoreStart
+            throw new ClosureAnalysisException(
+                'The closure was not found within the abstract syntax tree.'
+            );
+            // @codeCoverageIgnoreEnd
+        }
+
+        $data['location'] = $locator->location;
+    }
+
+    /**
+     * Returns the variables that in the "use" clause of the closure definition.
+     * These are referred to as the "used variables", "static variables", or
+     * "closed upon variables", "context" of the closure.
+     *
+     * @param array $data
+     */
+    protected function determineContext(array &$data)
+    {
+        // Get the variable names defined in the AST
+        $refs = 0;
+        $vars = array_map(function ($node) use (&$refs) {
+            if ($node->byRef) {
+                $refs++;
+            }
+            return $node->var;
+        }, $data['ast']->uses);
+        $data['hasRefs'] = ($refs > 0);
+
+        // Get the variable names and values using reflection
+        $values = $data['reflection']->getStaticVariables();
+
+        // Combine the names and values to create the canonical context.
+        foreach ($vars as $name) {
+            if (isset($values[$name])) {
+                $data['context'][$name] = $values[$name];
+            }
+        }
+    }
+
+    /**
+     * @param \ReflectionFunction $reflection
+     *
+     * @throws ClosureAnalysisException
+     *
+     * @return \PhpParser\Node[]
+     */
+    private function getFileAst(\ReflectionFunction $reflection)
+    {
+        $fileName = $reflection->getFileName();
+        if (!file_exists($fileName)) {
+            throw new ClosureAnalysisException(
+                "The file containing the closure, \"{$fileName}\" did not exist."
+            );
+        }
+
+        $parser = new CodeParser(new EmulativeLexer);
+
+        return $parser->parse(file_get_contents($fileName));
+    }
+}

vendor/jeremeamia/SuperClosure/src/Analyzer/ClosureAnalyzer.php

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+<?php namespace SuperClosure\Analyzer;
+
+use SuperClosure\Exception\ClosureAnalysisException;
+
+abstract class ClosureAnalyzer
+{
+    /**
+     * Analyzer a given closure.
+     *
+     * @param \Closure $closure
+     *
+     * @throws ClosureAnalysisException
+     *
+     * @return array
+     */
+    public function analyze(\Closure $closure)
+    {
+        $data = [
+            'reflection' => new \ReflectionFunction($closure),
+            'code'       => null,
+            'hasThis'    => false,
+            'context'    => [],
+            'hasRefs'    => false,
+            'binding'    => null,
+            'scope'      => null,
+            'isStatic'   => $this->isClosureStatic($closure),
+        ];
+
+        $this->determineCode($data);
+        $this->determineContext($data);
+        $this->determineBinding($data);
+
+        return $data;
+    }
+
+    abstract protected function determineCode(array &$data);
+
+    /**
+     * Returns the variables that are in the "use" clause of the closure.
+     *
+     * These variables are referred to as the "used variables", "static
+     * variables", "closed upon variables", or "context" of the closure.
+     *
+     * @param array $data
+     */
+    abstract protected function determineContext(array &$data);
+
+    private function determineBinding(array &$data)
+    {
+        $data['binding'] = $data['reflection']->getClosureThis();
+        if ($scope = $data['reflection']->getClosureScopeClass()) {
+            $data['scope'] = $scope->getName();
+        }
+    }
+
+    private function isClosureStatic(\Closure $closure)
+    {
+        $rebound = new \ReflectionFunction(@$closure->bindTo(new \stdClass));
+
+        return $rebound->getClosureThis() === null;
+    }
+}

vendor/jeremeamia/SuperClosure/src/Analyzer/Token.php

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+<?php namespace SuperClosure\Analyzer;
+
+/**
+ * A Token object represents and individual token parsed from PHP code.
+ *
+ * Each Token object is a normalized token created from the result of the
+ * `get_token_all()`. function, which is part of PHP's tokenizer.
+ *
+ * @link http://us2.php.net/manual/en/tokens.php
+ */
+class Token
+{
+    /**
+     * @var string The token name. Always null for literal tokens.
+     */
+    public $name;
+
+    /**
+     * @var int|null The token's integer value. Always null for literal tokens.
+     */
+    public $value;
+
+    /**
+     * @var string The PHP code of the token.
+     */
+    public $code;
+
+    /**
+     * @var int|null The line number of the token in the original code.
+     */
+    public $line;
+
+    /**
+     * Constructs a token object.
+     *
+     * @param string   $code
+     * @param int|null $value
+     * @param int|null $line
+     *
+     * @throws \InvalidArgumentException
+     */
+    public function __construct($code, $value = null, $line = null)
+    {
+        if (is_array($code)) {
+            list($value, $code, $line) = array_pad($code, 3, null);
+        }
+
+        $this->code = $code;
+        $this->value = $value;
+        $this->line = $line;
+        $this->name = $value ? token_name($value) : null;
+    }
+
+    /**
+     * Determines if the token's value/code is equal to the specified value.
+     *
+     * @param mixed $value The value to check.
+     *
+     * @return bool True if the token is equal to the value.
+     */
+    public function is($value)
+    {
+        return ($this->code === $value || $this->value === $value);
+    }
+
+    public function __toString()
+    {
+        return $this->code;
+    }
+}

vendor/jeremeamia/SuperClosure/src/Analyzer/TokenAnalyzer.php

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+<?php namespace SuperClosure\Analyzer;
+
+use SuperClosure\Exception\ClosureAnalysisException;
+
+/**
+ * This is the token based analyzer.
+ *
+ * We're using Uses reflection and tokenization to analyze a closure and
+ * determine its code and context. This is much faster than the AST based
+ * implementation.
+ */
+class TokenAnalyzer extends ClosureAnalyzer
+{
+    public function determineCode(array &$data)
+    {
+        $this->determineTokens($data);
+        $data['code'] = implode('', $data['tokens']);
+        $data['hasThis'] = (strpos($data['code'], '$this') !== false);
+    }
+
+    private function determineTokens(array &$data)
+    {
+        $potential = $this->determinePotentialTokens($data['reflection']);
+        $braceLevel = $index = $step = $insideUse = 0;
+        $data['tokens'] = $data['context'] = [];
+
+        foreach ($potential as $token) {
+            $token = new Token($token);
+            switch ($step) {
+                // Handle tokens before the function declaration.
+                case 0:
+                    if ($token->is(T_FUNCTION)) {
+                        $data['tokens'][] = $token;
+                        $step++;
+                    }
+                    break;
+                // Handle tokens inside the function signature.
+                case 1:
+                    $data['tokens'][] = $token;
+                    if ($insideUse) {
+                        if ($token->is(T_VARIABLE)) {
+                            $varName = trim($token, '$ ');
+                            $data['context'][$varName] = null;
+                        } elseif ($token->is('&')) {
+                            $data['hasRefs'] = true;
+                        }
+                    } elseif ($token->is(T_USE)) {
+                        $insideUse++;
+                    }
+                    if ($token->is('{')) {
+                        $step++;
+                        $braceLevel++;
+                    }
+                    break;
+                // Handle tokens inside the function body.
+                case 2:
+                    $data['tokens'][] = $token;
+                    if ($token->is('{')) {
+                        $braceLevel++;
+                    } elseif ($token->is('}')) {
+                        $braceLevel--;
+                        if ($braceLevel === 0) {
+                            $step++;
+                        }
+                    }
+                    break;
+                // Handle tokens after the function declaration.
+                case 3:
+                    if ($token->is(T_FUNCTION)) {
+                        throw new ClosureAnalysisException('Multiple closures '
+                            . 'were declared on the same line of code. Could '
+                            . 'determine which closure was the intended target.'
+                        );
+                    }
+                    break;
+            }
+        }
+    }
+
+    private function determinePotentialTokens(\ReflectionFunction $reflection)
+    {
+        // Load the file containing the code for the function.
+        $fileName = $reflection->getFileName();
+        if (!is_readable($fileName)) {
+            throw new ClosureAnalysisException(
+                "Cannot read the file containing the closure: \"{$fileName}\"."
+            );
+        }
+
+        $code = '';
+        $file = new \SplFileObject($fileName);
+        $file->seek($reflection->getStartLine() - 1);
+        while ($file->key() < $reflection->getEndLine()) {
+            $code .= $file->current();
+            $file->next();
+        }
+
+        $code = trim($code);
+        if (strpos($code, '<?php') !== 0) {
+            $code = "<?php\n" . $code;
+        }
+
+        return token_get_all($code);
+    }
+
+    protected function determineContext(array &$data)
+    {
+        // Get the values of the variables that are closed upon in "use".
+        $values = $data['reflection']->getStaticVariables();
+
+        // Construct the context by combining the variable names and values.
+        foreach ($data['context'] as $name => &$value) {
+            if (isset($values[$name])) {
+                $value = $values[$name];
+            }
+        }
+    }
+}

vendor/jeremeamia/SuperClosure/src/Analyzer/Visitor/ClosureLocatorVisitor.php

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+<?php namespace SuperClosure\Analyzer\Visitor;
+
+use SuperClosure\Exception\ClosureAnalysisException;
+use PhpParser\Node\Stmt\Namespace_ as NamespaceNode;
+use PhpParser\Node\Stmt\Trait_ as TraitNode;
+use PhpParser\Node\Stmt\Class_ as ClassNode;
+use PhpParser\Node\Expr\Closure as ClosureNode;
+use PhpParser\Node as AstNode;
+use PhpParser\NodeVisitorAbstract as NodeVisitor;
+
+/**
+ * This is a visitor that extends the nikic/php-parser library and looks for a
+ * closure node and its location.
+ *
+ * @internal
+ */
+final class ClosureLocatorVisitor extends NodeVisitor
+{
+    /**
+     * @var \ReflectionFunction
+     */
+    private $reflection;
+
+    /**
+     * @var ClosureNode
+     */
+    public $closureNode;
+
+    /**
+     * @var array
+     */
+    public $location;
+
+    /**
+     * @param \ReflectionFunction $reflection
+     */
+    public function __construct($reflection)
+    {
+        $this->reflection = $reflection;
+        $this->location = [
+            'class'     => null,
+            'directory' => dirname($this->reflection->getFileName()),
+            'file'      => $this->reflection->getFileName(),
+            'function'  => $this->reflection->getName(),
+            'line'      => $this->reflection->getStartLine(),
+            'method'    => null,
+            'namespace' => null,
+            'trait'     => null,
+        ];
+    }
+
+    public function enterNode(AstNode $node)
+    {
+        // Determine information about the closure's location
+        if (!$this->closureNode) {
+            if ($node instanceof NamespaceNode) {
+                $namespace = ($node->name && is_array($node->name->parts))
+                    ? implode('\\', $node->name->parts)
+                    : null;
+                $this->location['namespace'] = $namespace;
+            }
+            if ($node instanceof TraitNode) {
+                $this->location['trait'] = $node->name;
+                $this->location['class'] = null;
+            } elseif ($node instanceof ClassNode) {
+                $this->location['class'] = $node->name;
+                $this->location['trait'] = null;
+            }
+        }
+
+        // Locate the node of the closure
+        if ($node instanceof ClosureNode) {
+            if ($node->getAttribute('startLine') == $this->location['line']) {
+                if ($this->closureNode) {
+                    $line = $this->location['file'] . ':' . $node->getAttribute('startLine');
+                    throw new ClosureAnalysisException("Two closures were "
+                        . "declared on the same line ({$line}) of code. Cannot "
+                        . "determine which closure was the intended target.");
+                } else {
+                    $this->closureNode = $node;
+                }
+            }
+        }
+    }
+
+    public function leaveNode(AstNode $node)
+    {
+        // Determine information about the closure's location
+        if (!$this->closureNode) {
+            if ($node instanceof NamespaceNode) {
+                $this->location['namespace'] = null;
+            }
+            if ($node instanceof TraitNode) {
+                $this->location['trait'] = null;
+            } elseif ($node instanceof ClassNode) {
+                $this->location['class'] = null;
+            }
+        }
+    }
+
+    public function afterTraverse(array $nodes)
+    {
+        if ($this->location['class']) {
+            $this->location['class'] = $this->location['namespace'] . '\\' . $this->location['class'];
+            $this->location['method'] = "{$this->location['class']}::{$this->location['function']}";
+        } elseif ($this->location['trait']) {
+            $this->location['trait'] = $this->location['namespace'] . '\\' . $this->location['trait'];
+            $this->location['method'] = "{$this->location['trait']}::{$this->location['function']}";
+        }
+
+        if (!$this->location['class']) {
+            /** @var \ReflectionClass $closureScopeClass */
+            $closureScopeClass = $this->reflection->getClosureScopeClass();
+            $this->location['class'] = $closureScopeClass ? $closureScopeClass->getName() : null;
+        }
+    }
+}

vendor/jeremeamia/SuperClosure/src/Analyzer/Visitor/MagicConstantVisitor.php

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+<?php namespace SuperClosure\Analyzer\Visitor;
+
+use PhpParser\Node\Scalar\LNumber as NumberNode;
+use PhpParser\Node\Scalar\String as StringNode;
+use PhpParser\Node as AstNode;
+use PhpParser\NodeVisitorAbstract as NodeVisitor;
+
+/**
+ * This is a visitor that resolves magic constants (e.g., __FILE__) to their
+ * intended values within a closure's AST.
+ *
+ * @internal
+ */
+final class MagicConstantVisitor extends NodeVisitor
+{
+    /**
+     * @var array
+     */
+    private $location;
+
+    /**
+     * @param array $location
+     */
+    public function __construct(array $location)
+    {
+        $this->location = $location;
+    }
+
+    public function leaveNode(AstNode $node)
+    {
+        switch ($node->getType()) {
+            case 'Scalar_MagicConst_Class' :
+                return new StringNode($this->location['class']);
+            case 'Scalar_MagicConst_Dir' :
+                return new StringNode($this->location['directory']);
+            case 'Scalar_MagicConst_File' :
+                return new StringNode($this->location['file']);
+            case 'Scalar_MagicConst_Function' :
+                return new StringNode($this->location['function']);
+            case 'Scalar_MagicConst_Line' :
+                return new NumberNode($node->getAttribute('startLine'));
+            case 'Scalar_MagicConst_Method' :
+                return new StringNode($this->location['method']);
+            case 'Scalar_MagicConst_Namespace' :
+                return new StringNode($this->location['namespace']);
+            case 'Scalar_MagicConst_Trait' :
+                return new StringNode($this->location['trait']);
+        }
+    }
+}

vendor/jeremeamia/SuperClosure/src/Analyzer/Visitor/ThisDetectorVisitor.php

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+<?php namespace SuperClosure\Analyzer\Visitor;
+
+use PhpParser\Node as AstNode;
+use PhpParser\Node\Expr\Variable as VariableNode;
+use PhpParser\NodeVisitorAbstract as NodeVisitor;
+
+/**
+ * Detects if the closure's AST contains a $this variable.
+ *
+ * @internal
+ */
+final class ThisDetectorVisitor extends NodeVisitor
+{
+    /**
+     * @var bool
+     */
+    public $detected = false;
+
+    public function leaveNode(AstNode $node)
+    {
+        if ($node instanceof VariableNode) {
+            if ($node->name === 'this') {
+                $this->detected = true;
+            }
+        }
+    }
+}