@param array              $expression
@param Call               $call
@param CompilationContext $context

@throws CompilerException

@return bool|CompiledExpression
480013
public function optimize(array $expression, Call $call, CompilationContext $context)
    {
        if (!isset($expression['parameters'])) {
            return false;
        }

        if (1 != \count($expression['parameters'])) {
            return false;
        }

        $context->headersManager->add('kernel/object');

        try {
            $resolvedParams = $call->getReadOnlyResolvedParams($expression['parameters'], $context, $expression);

            return new CompiledExpression('bool', 'zephir_is_private_prop('.$resolvedParams[0].')', $expression);
        } catch (Exception $e) {
            throw  new CompilerException($e->getMessage(), $expression);
        }
    }
172194
public function join($caller, CompilationContext $compilationContext, Call $call, array $expression)
    {
        $functionCall = BuilderFactory::getInstance()->statements()
            ->functionCall('join', $expression['parameters'])
            ->addArgument($caller)
            ->setFile($expression['file'])
            ->setLine($expression['line'])
            ->setChar($expression['char']);

        $expression = new Expression($functionCall->build());

        return $expression->compile($compilationContext);
    }
599009
public function evaluate(array $values, Context $context, Token $token)
    {
        if (count($values) !== $this->getOperands()) {
            throw new ExpressionException('Invalid number of operands for operator.',
              $this, $values);
        }
        $evaluator = $this->evaluator;
        return (string)$evaluator($values, $context, $token);
    }
748439
private function processOptionals(array &$expression, Call $call, CompilationContext $context)
    {
        $flags = null;
        $offset = null;

        $offsetParamOffset = 4;
        if (isset($expression['parameters'][4]) && 'int' === $expression['parameters'][4]['parameter']['type']) {
            $offset = $expression['parameters'][4]['parameter']['value'].' ';
            unset($expression['parameters'][4]);
        }

        if (isset($expression['parameters'][3]) && 'int' === $expression['parameters'][3]['parameter']['type']) {
            $flags = $expression['parameters'][3]['parameter']['value'].' ';
            $offsetParamOffset = 3;
            unset($expression['parameters'][3]);
        }

        try {
            $resolvedParams = $call->getReadOnlyResolvedParams($expression['parameters'], $context, $expression);

            if (null === $offset && isset($resolvedParams[$offsetParamOffset])) {
                $context->headersManager->add('kernel/operators');
                $offset = 'zephir_get_intval('.$resolvedParams[$offsetParamOffset].') ';
            }

            if (null === $flags && isset($resolvedParams[3])) {
                $context->headersManager->add('kernel/operators');
                $flags = 'zephir_get_intval('.$resolvedParams[3].') ';
            }
        } catch (Exception $e) {
            throw new CompilerException($e->getMessage(), $expression, $e->getCode(), $e);
        }

        if (null === $flags) {
            $flags = '0 ';
        }

        if (null === $offset) {
            $offset = '0 ';
        }

        return [$flags, $offset];
    }
424005
public function compile(CompilationContext $compilationContext)
    {
        /*
         * Set the method currently being compiled
         */
        $compilationContext->currentMethod = $this;

        /*
         * Initialize the method warm-up to null
         */
        $compilationContext->methodWarmUp = null;

        /**
         * Assign pre-made compilation passes.
         */
        $localContext = $this->localContext;
        $typeInference = $this->typeInference;
        $callGathererPass = $this->callGathererPass;

        /**
         * Initialization of parameters happens in a fictitious external branch.
         */
        $branch = new Branch();
        $branch->setType(Branch::TYPE_EXTERNAL);
        /**
         * BranchManager helps to create graphs of conditional/loop/root/jump branches.
         */
        $branchManager = new BranchManager();
        $branchManager->addBranch($branch);

        $compilationContext->branchManager = $branchManager;

        /**
         * Every method has its own symbol table.
         */
        $symbolTable = new SymbolTable($compilationContext);
        if ($localContext) {
            $symbolTable->setLocalContext($localContext);
        }

        if ($this->staticVariables) {
            foreach ($this->staticVariables as $var) {
                $localVar = clone $var;
                $localVar->setIsExternal(true);
                $localVar->setLocalOnly(true);
                $localVar->setType('variable');
                $symbolTable->addRawVariable($localVar);
            }
        }

        /**
         * Parameters has an additional extra mutation.
         */
        $parameters = $this->parameters;
        if ($localContext) {
            if (\is_object($parameters)) {
                foreach ($parameters->getParameters() as $parameter) {
                    $localContext->increaseMutations($parameter['name']);
                }
            }
        }

        /**
         * Cache Manager manages function calls, method calls and class entries caches.
         */
        $cacheManager = new CacheManager();
        $cacheManager->setGatherer($callGathererPass);

        $compilationContext->cacheManager = $cacheManager;
        $compilationContext->typeInference = $typeInference;
        $compilationContext->symbolTable = $symbolTable;

        $oldCodePrinter = $compilationContext->codePrinter;

        /**
         * Change the code printer to a single method instance.
         */
        $codePrinter = new CodePrinter();
        $compilationContext->codePrinter = $codePrinter;

        /*
         * Set an empty function cache
         */
        $compilationContext->functionCache = null;

        /*
         * Reset try/catch and loop counter
         */
        $compilationContext->insideCycle = 0;
        $compilationContext->insideTryCatch = 0;
        $compilationContext->currentTryCatch = 0;

        if (\is_object($parameters)) {
            /**
             * Round 1. Create variables in parameters in the symbol table.
             */
            $classCastChecks = [];
            $substituteVars = [];
            foreach ($parameters->getParameters() as $parameter) {
                /*
                 * Change dynamic variables to low level types
                 */
                if ($typeInference) {
                    if (isset($parameter['data-type'])) {
                        if ('variable' == $parameter['data-type']) {
                            $type = $typeInference->getInferedType($parameter['name']);
                            if (\is_string($type)) {
                                /* promote polymorphic parameters to low level types */
                            }
                        }
                    } else {
                        $type = $typeInference->getInferedType($parameter['name']);
                        if (\is_string($type)) {
                            /* promote polymorphic parameters to low level types */
                        }
                    }
                }

                $symbolParam = null;

                if (isset($parameter['data-type'])) {
                    switch ($parameter['data-type']) {
                        case 'object':
                        case 'callable':
                        case 'resource':
                        case 'variable':
                            $symbol = $symbolTable->addVariable($parameter['data-type'], $parameter['name'], $compilationContext);
                            /* TODO: Move this to the respective backend, which requires refactoring how this works */
                            if ($compilationContext->backend->isZE3()) {
                                $symbol->setIsDoublePointer(true);
                                $substituteVars[$parameter['name']] = $symbolTable->addVariable('variable', $parameter['name'].'_sub', $compilationContext);
                            }
                            break;

                        default:
                            $symbol = $symbolTable->addVariable($parameter['data-type'], $parameter['name'], $compilationContext);
                            $symbolParam = $symbolTable->addVariable('variable', $parameter['name'].'_param', $compilationContext);
                            /* TODO: Move this to the respective backend, which requires refactoring how this works */
                            if ($compilationContext->backend->isZE3()) {
                                $symbolParam->setIsDoublePointer(true);
                            }
                            if ('string' == $parameter['data-type'] || 'array' == $parameter['data-type']) {
                                $symbol->setMustInitNull(true);
                            }
                            break;
                    }
                } else {
                    $symbol = $symbolTable->addVariable('variable', $parameter['name'], $compilationContext);
                }

                /* ZE3 only */
                if (isset($substituteVars[$parameter['name']])) {
                    $substituteVar = $substituteVars[$parameter['name']];
                    $substituteVar->increaseUses();
                }

                /*
                 * Some parameters can be read-only
                 */
                if (isset($parameter['const']) && $parameter['const']) {
                    $symbol->setReadOnly(true);
                    if (\is_object($symbolParam)) {
                        $symbolParam->setReadOnly(true);
                    }
                }

                if (\is_object($symbolParam)) {
                    /*
                     * Parameters are marked as 'external'
                     */
                    $symbolParam->setIsExternal(true);

                    /*
                     * Assuming they're initialized
                     */
                    $symbolParam->setIsInitialized(true, $compilationContext);

                    /*
                     * Initialize auxiliary parameter zvals to null
                     */
                    $symbolParam->setMustInitNull(true);

                    /*
                     * Increase uses
                     */
                    $symbolParam->increaseUses();
                } else {
                    if (isset($parameter['default'])) {
                        if (isset($parameter['data-type'])) {
                            if ('variable' == $parameter['data-type']) {
                                $symbol->setMustInitNull(true);
                            }
                        } else {
                            $symbol->setMustInitNull(true);
                        }
                    }
                }

                /*
                 * Original node where the variable was declared
                 */
                $symbol->setOriginal($parameter);

                /*
                 * Parameters are marked as 'external'
                 */
                $symbol->setIsExternal(true);

                /*
                 * Assuming they're initialized
                 */
                $symbol->setIsInitialized(true, $compilationContext);

                /*
                 * Variables with class/type must be objects across the execution
                 */
                if (isset($parameter['cast'])) {
                    $symbol->setDynamicTypes('object');
                    $symbol->setClassTypes($compilationContext->getFullName($parameter['cast']['value']));
                    $classCastChecks[] = [$symbol, $parameter];
                } else {
                    if (isset($parameter['data-type'])) {
                        if ('variable' == $parameter['data-type']) {
                            $symbol->setDynamicTypes('undefined');
                        }
                    } else {
                        $symbol->setDynamicTypes('undefined');
                    }
                }
            }
        }

        $compilationContext->backend->onPreCompile($this, $compilationContext);

        /*
         * Compile the block of statements if any
         */
        if (\is_object($this->statements)) {
            if ($this->hasModifier('static')) {
                $compilationContext->staticContext = true;
            } else {
                $compilationContext->staticContext = false;
            }

            /*
             * Compile the statements block as a 'root' branch
             */
            $this->statements->compile($compilationContext, false, Branch::TYPE_ROOT);
        }

        /**
         * Initialize variable default values.
         */
        $initVarCode = $compilationContext->backend->initializeVariableDefaults($symbolTable->getVariables(), $compilationContext);

        /**
         * Fetch parameters from vm-top.
         */
        $initCode = '';
        $code = '';
        if (\is_object($parameters)) {
            /**
             * Round 2. Fetch the parameters in the method.
             */
            $params = [];
            $requiredParams = [];
            $optionalParams = [];
            $numberRequiredParams = 0;
            $numberOptionalParams = 0;
            foreach ($parameters->getParameters() as $parameter) {
                if (isset($parameter['data-type'])) {
                    $dataType = $parameter['data-type'];
                } else {
                    $dataType = 'variable';
                }

                switch ($dataType) {
                    case 'object':
                    case 'callable':
                    case 'resource':
                    case 'variable':
                        if (!$this->isInternal()) {
                            $params[] = '&'.$parameter['name'];
                        } else {
                            $params[] = $parameter['name'];
                        }
                        break;

                    default:
                        if (!$this->isInternal()) {
                            $params[] = '&'.$parameter['name'].'_param';
                        } else {
                            $params[] = $parameter['name'].'_param';
                        }
                        break;
                }

                if (isset($parameter['default'])) {
                    $optionalParams[] = $parameter;
                    ++$numberOptionalParams;
                } else {
                    $requiredParams[] = $parameter;
                    ++$numberRequiredParams;
                }
            }

            /**
             * Pass the write detector to the method statement block to check if the parameter
             * variable is modified so as do the proper separation.
             */
            $parametersToSeparate = [];
            if (\is_object($this->statements)) {
                /*
                 * If local context is not available
                 */
                if (!$localContext) {
                    $writeDetector = new WriteDetector();
                }

                foreach ($parameters->getParameters() as $parameter) {
                    if (isset($parameter['data-type'])) {
                        $dataType = $parameter['data-type'];
                    } else {
                        $dataType = 'variable';
                    }

                    switch ($dataType) {
                        case 'variable':
                        case 'string':
                        case 'array':
                        case 'resource':
                        case 'object':
                        case 'callable':
                            $name = $parameter['name'];
                            if (!$localContext) {
                                if ($writeDetector->detect($name, $this->statements->getStatements())) {
                                    $parametersToSeparate[$name] = true;
                                }
                            } else {
                                if ($localContext->getNumberOfMutations($name) > 1) {
                                    $parametersToSeparate[$name] = true;
                                }
                            }
                            break;
                    }
                }
            }

            /*
             * Initialize required parameters
             */
            foreach ($requiredParams as $parameter) {
                if (isset($parameter['mandatory'])) {
                    $mandatory = $parameter['mandatory'];
                } else {
                    $mandatory = 0;
                }

                if (isset($parameter['data-type'])) {
                    $dataType = $parameter['data-type'];
                } else {
                    $dataType = 'variable';
                }

                if ('variable' != $dataType) {
                    /*
                     * Assign value from zval to low level type
                     */
                    if ($mandatory) {
                        $initCode .= $this->checkStrictType($parameter, $compilationContext);
                    } else {
                        $initCode .= $this->assignZvalValue($parameter, $compilationContext);
                    }
                }

                switch ($dataType) {
                    case 'variable':
                    case 'resource':
                    case 'object':
                    case 'callable':
                        if (isset($parametersToSeparate[$parameter['name']])) {
                            $symbolTable->mustGrownStack(true);
                            $initCode .= "\t".'ZEPHIR_SEPARATE_PARAM('.$parameter['name'].');'.PHP_EOL;
                        }
                        break;
                }
            }

            /*
             * Initialize optional parameters
             */
            foreach ($optionalParams as $parameter) {
                if (isset($parameter['mandatory'])) {
                    $mandatory = $parameter['mandatory'];
                } else {
                    $mandatory = 0;
                }

                if (isset($parameter['data-type'])) {
                    $dataType = $parameter['data-type'];
                } else {
                    $dataType = 'variable';
                }

                switch ($dataType) {
                    case 'object':
                    case 'callable':
                    case 'resource':
                    case 'variable':
                        $name = $parameter['name'];
                        break;

                    default:
                        $name = $parameter['name'].'_param';
                        break;
                }

                /**
                 * Assign the default value according to the variable's type.
                 */
                $targetVar = $compilationContext->symbolTable->getVariableForWrite($name, $compilationContext);
                $initCode .= "\t".$compilationContext->backend->ifVariableValueUndefined($targetVar, $compilationContext, false, false).PHP_EOL;

                if ($compilationContext->backend->isZE3()) {
                    if ($targetVar->isDoublePointer() && isset($substituteVars[$parameter['name']])) {
                        $substituteVar = $substituteVars[$parameter['name']];
                        $initCode .= "\t\t".$targetVar->getName().' = &'.$substituteVar->getName().';'.PHP_EOL;
                    }
                }
                $initCode .= $this->assignDefaultValue($parameter, $compilationContext);

                if (isset($parametersToSeparate[$name]) || 'variable' != $dataType) {
                    $initCode .= "\t".'} else {'.PHP_EOL;
                    if (isset($parametersToSeparate[$name])) {
                        $initCode .= "\t\t".'ZEPHIR_SEPARATE_PARAM('.$name.');'.PHP_EOL;
                    } else {
                        if ($mandatory) {
                            $initCode .= $this->checkStrictType($parameter, $compilationContext, $mandatory);
                        } else {
                            $initCode .= "\t".$this->assignZvalValue($parameter, $compilationContext);
                        }
                    }
                }

                $initCode .= "\t".'}'.PHP_EOL;
            }

            /*
             * Fetch the parameters to zval pointers
             */
            $codePrinter->preOutputBlankLine();

            if (!$this->isInternal()) {
                $compilationContext->headersManager->add('kernel/memory');
                if ($symbolTable->getMustGrownStack()) {
                    $code .= "\t".'zephir_fetch_params(1, '.$numberRequiredParams.', '.$numberOptionalParams.', '.implode(', ', $params).');'.PHP_EOL;
                } else {
                    $code .= "\t".'zephir_fetch_params(0, '.$numberRequiredParams.', '.$numberOptionalParams.', '.implode(', ', $params).');'.PHP_EOL;
                }
            } else {
                foreach ($params as $param) {
                    /* TODO: Migrate all this code to codeprinter, get rid of temp code printer */
                    $tempCodePrinter = new CodePrinter();
                    $realCodePrinter = $compilationContext->codePrinter;
                    $compilationContext->codePrinter = $tempCodePrinter;
                    $paramVar = $compilationContext->symbolTable->getVariableForRead($param, $compilationContext);
                    $compilationContext->backend->assignZval($paramVar, $param.'_ext', $compilationContext);
                    $code .= "\t".$tempCodePrinter->getOutput().PHP_EOL;
                    $compilationContext->codePrinter = $realCodePrinter;
                }
            }
            $code .= PHP_EOL;
        }

        $code .= $initCode.$initVarCode;
        $codePrinter->preOutput($code);

        $compilationContext->headersManager->add('kernel/object');
        /*
         * Fetch used superglobals
         */
        foreach ($symbolTable->getVariables() as $name => $variable) {
            if ($variable->isSuperGlobal()) {
                $globalVar = $symbolTable->getVariable($name);
                $codePrinter->preOutput("\t".$compilationContext->backend->fetchGlobal($globalVar, $compilationContext, false));
            }
            if ($variable->isLocalSatic()) {
                $staticVar = $symbolTable->getVariable($name);

                $codePrinter->preOutput(sprintf(
                    "\t".'zephir_read_static_property_ce(%s%s, %s, SL("%s"), PH_NOISY_CC%s);',
                    $staticVar->isDoublePointer() ? '' : '&',
                    $staticVar->getName(),
                    $this->classDefinition->getClassEntry(),
                    $staticVar->getName(),
                    ''
                ));
            }
        }

        /*
         * Grow the stack if needed
         */
        if ($symbolTable->getMustGrownStack()) {
            $compilationContext->headersManager->add('kernel/memory');
            $codePrinter->preOutput("\t".'ZEPHIR_MM_GROW();');
        }

        /**
         * Check if there are unused variables.
         */
        $usedVariables = [];
        $classDefinition = $this->getClassDefinition();
        if ($classDefinition) {
            $completeName = $classDefinition->getCompleteName();
        } else {
            $completeName = '[unknown]';
        }

        foreach ($symbolTable->getVariables() as $variable) {
            if ($variable->getNumberUses() <= 0) {
                if (false == $variable->isExternal()) {
                    $compilationContext->logger->warning(
                        'Variable "'.$variable->getName().'" declared but not used in '.$completeName.'::'.$this->getName(),
                        ['unused-variable', $variable->getOriginal()]
                    );
                    continue;
                }
                $compilationContext->logger->warning(
                    'Variable "'.$variable->getName().'" declared but not used in '.$completeName.'::'.$this->getName(),
                    ['unused-variable-external', $variable->getOriginal()]
                );
            }

            if ('this_ptr' != $variable->getName() && 'return_value' != $variable->getName() && 'return_value_ptr' != $variable->getName()) {
                $type = $variable->getType();
                if (!isset($usedVariables[$type])) {
                    $usedVariables[$type] = [];
                }
                $usedVariables[$type][] = $variable;
            }
        }

        /*
         * Check if there are assigned but not used variables
         * Warn whenever a variable is unused aside from its declaration.
         */
        foreach ($symbolTable->getVariables() as $variable) {
            if (true == $variable->isExternal() || $variable->isTemporal()) {
                continue;
            }

            if ('this_ptr' == $variable->getName() || 'return_value' == $variable->getName() || 'return_value_ptr' == $variable->getName() || 'ZEPHIR_LAST_CALL_STATUS' == $variable->getName()) {
                continue;
            }

            if (!$variable->isUsed()) {
                $node = $variable->getLastUsedNode();
                if (\is_array($node)) {
                    $expression = isset($node['expr']) ? $node['expr'] : $node;
                    $compilationContext->logger->warning(
                        'Variable "'.$variable->getName().'" assigned but not used in '.$completeName.'::'.$this->getName(),
                        ['unused-variable', $expression]
                    );
                } else {
                    $compilationContext->logger->warning(
                        'Variable "'.$variable->getName().'" assigned but not used in '.$completeName.'::'.$this->getName(),
                        ['unused-variable', $variable->getOriginal()]
                    );
                }
            }
        }

        if (\count($usedVariables)) {
            $codePrinter->preOutputBlankLine();
        }

        /**
         * Generate the variable definition for variables used.
         */
        $initCode = "\t".implode(PHP_EOL."\t", $compilationContext->backend->declareVariables($this, $usedVariables, $compilationContext));
        if ($initCode) {
            $codePrinter->preOutput($initCode);
        }

        /*
         * Finalize the method compilation
         */
        if (\is_object($this->statements)) {
            /**
             * If the last statement is not a 'return' or 'throw' we need to
             * restore the memory stack if needed.
             */
            $lastType = $this->statements->getLastStatementType();

            if ('return' != $lastType && 'throw' != $lastType && !$this->hasChildReturnStatementType($this->statements->getLastStatement())) {
                if ($symbolTable->getMustGrownStack()) {
                    $compilationContext->headersManager->add('kernel/memory');
                    $codePrinter->output("\t".'ZEPHIR_MM_RESTORE();');
                }

                /*
                 * If a method has return-type hints we need to ensure the last statement is a 'return' statement
                 */
                if ($this->hasReturnTypes()) {
                    throw new CompilerException(
                        'Reached end of the method without returning a valid type specified in the return-type hints',
                        $this->expression['return-type']
                    );
                }
            }
        }

        $compilationContext->backend->onPostCompile($this, $compilationContext);

        /**
         * Remove macros that grow/restore the memory frame stack if it wasn't used.
         */
        $code = $this->removeMemoryStackReferences($symbolTable, $codePrinter->getOutput());

        /*
         * Restore the compilation context
         */
        $oldCodePrinter->output($code);
        $compilationContext->codePrinter = $oldCodePrinter;

        $compilationContext->branchManager = null;
        $compilationContext->cacheManager = null;
        $compilationContext->typeInference = null;

        $codePrinter->clear();

        return null;
    }
969737
public function execute($callable, array $args = [], $context = null)
    {
        if ($callable instanceof \Closure) {
            $ref = new \ReflectionObject($callable);

            $args = $this->getMethodArgs($ref->getMethod('__invoke'), $args);
        } else {
            if (is_string($callable)) {
                $callable = explode('::', $callable);
            }

            list($object, $method) = $callable;

            $ref = new \ReflectionClass($object);

            $args = $this->getMethodArgs($ref->getMethod($method), $args);
        }

        $closure = function () use ($args, $callable) {
            switch (count($args)) {
                case 0:
                    return $callable();
                case 1:
                    return $callable($args[0]);
                case 2:
                    return $callable($args[0], $args[1]);
                case 3:
                    return $callable($args[0], $args[1], $args[2]);
                case 4:
                    return $callable($args[0], $args[1], $args[2], $args[3]);
                default:
                    return call_user_func_array($callable, $args);
            }
        };

        if ($context) {
            $closure = $closure->bindTo($context, $context);
        }

        return $closure();
    }
1035427
public function evaluate($expression, Context $context)
    {
        $expression = trim($expression);
        $parser = new InterpretedEelParser($expression, $context);
        $res = $parser->match_Expression();

        if ($res === false) {
            throw new ParserException(sprintf('Expression "%s" could not be parsed.', $expression), 1344514198);
        } elseif ($parser->pos !== strlen($expression)) {
            throw new ParserException(sprintf('Expression "%s" could not be parsed. Error starting at character %d: "%s".', $expression, $parser->pos, substr($expression, $parser->pos)), 1344514188);
        } elseif (!array_key_exists('val', $res)) {
            throw new ParserException(sprintf('Parser error, no val in result %s ', json_encode($res)), 1344514204);
        }

        if ($res['val'] instanceof Context) {
            return $res['val']->unwrap();
        } else {
            return $res['val'];
        }
    }
1286102
public function compile($expression, CompilationContext $compilationContext)
    {
        /*
         * Resolves the symbol that expects the value
         */
        if ($this->expecting) {
            if ($this->expectingVariable) {
                $symbolVariable = $this->expectingVariable;
                if ('variable' != $symbolVariable->getType()) {
                    throw new CompilerException('Cannot use variable type: '.$symbolVariable->getType().' to store a reference', $expression);
                }
            } else {
                $symbolVariable = $compilationContext->symbolTable->getTempVariableForWrite('variable', $compilationContext, $expression);
            }
        } else {
            $symbolVariable = $compilationContext->symbolTable->getTempVariableForWrite('variable', $compilationContext, $expression);
        }

        $leftExpr = new Expression($expression['left']);
        $leftExpr->setReadOnly($this->readOnly);
        $left = $leftExpr->compile($compilationContext);

        switch ($left->getType()) {
            case 'variable':
            case 'string':
            case 'object':
            case 'array':
            case 'callable':
                break;
            default:
                throw new CompilerException('Cannot obtain a reference from type: '.$left->getType(), $expression);
        }

        $leftVariable = $compilationContext->symbolTable->getVariableForRead($left->getCode(), $compilationContext, $expression);
        switch ($leftVariable->getType()) {
            case 'variable':
            case 'string':
            case 'object':
            case 'array':
            case 'callable':
                break;
            default:
                throw new CompilerException('Cannot obtain reference from variable type: '.$leftVariable->getType(), $expression);
        }

        $symbolVariable->setMustInitNull(true);
        $compilationContext->symbolTable->mustGrownStack(true);

        $symbolVariable->increaseVariantIfNull();
        $compilationContext->codePrinter->output('ZEPHIR_MAKE_REFERENCE('.$symbolVariable->getName().', '.$leftVariable->getName().');');

        return new CompiledExpression('reference', $symbolVariable->getRealName(), $expression);
    }
72610
public function optimize(array $expression, Call $call, CompilationContext $context)
    {
        if (!isset($expression['parameters'])) {
            return false;
        }

        if (1 != \count($expression['parameters'])) {
            return false;
        }

        $resolvedParams = $call->getReadOnlyResolvedParams($expression['parameters'], $context, $expression);

        if ($context->backend->isZE3()) {
            if ('IS_BOOL' == $this->getType()) {
                $condition = '(Z_TYPE_P('.$resolvedParams[0].') == IS_TRUE || Z_TYPE_P('.$resolvedParams[0].') == IS_FALSE)';
            } else {
                $condition = 'Z_TYPE_P('.$resolvedParams[0].') == '.$this->getType();
            }
        } else {
            $condition = 'Z_TYPE_P('.$resolvedParams[0].') == '.$this->getType();
        }

        return new CompiledExpression('bool', $condition, $expression);
    }
992875
public function optimize(array $expression, Call $call, CompilationContext $context)
    {
        if (!isset($expression['parameters']) || 1 != \count($expression['parameters'])) {
            throw new CompilerException(
                sprintf(
                    'func_get_arg() expects at exactly 1 parameter, %d given',
                    isset($expression['parameters']) ? \count($expression['parameters']) : 0
                ),
                $expression
            );
        }

        /*
         * Process the expected symbol to be returned
         */
        $call->processExpectedReturn($context);

        $symbolVariable = $call->getSymbolVariable(true, $context);
        if ($symbolVariable->isNotVariableAndString()) {
            throw new CompilerException(
                'Returned values by functions can only be assigned to variant variables.',
                $expression
            );
        }

        if ($call->mustInitSymbolVariable()) {
            $symbolVariable->initVariant($context);
        }

        $symbol = $context->backend->getVariableCode($symbolVariable);

        try {
            $resolvedParams = $call->getReadOnlyResolvedParams($expression['parameters'], $context, $expression);

            // zephir_get_intval
            $context->headersManager->add('kernel/operators');

            // zephir_get_arg
            $context->headersManager->add('kernel/main');

            if ($context->backend->isZE3()) {
                $template = 'zephir_get_arg(%s, zephir_get_intval(%s));';
            } else {
                $template = 'zephir_get_arg(%s, zephir_get_intval(%s) TSRMLS_CC);';
            }

            $context->codePrinter->output(sprintf($template, $symbol, $resolvedParams[0]));

            return new CompiledExpression('variable', $symbolVariable->getRealName(), $expression);
        } catch (Exception $e) {
            throw new CompilerException($e->getMessage(), $expression, $e->getCode(), $e);
        }
    }
98976
protected XExpression _generate(XFeatureCall call, IAppendable it, IExtraLanguageGeneratorContext context) {
		appendReturnIfExpectedReturnedExpression(it, context);
		newFeatureCallGenerator(context, it).generate(call);
		return call;
	}
44347
public function optimize(array $expression, Call $call, CompilationContext $context)
    {
        if (!isset($expression['parameters']) || 2 != \count($expression['parameters'])) {
            throw new CompilerException(sprintf("'%s' requires two parameters", $this->getFunctionName()), $expression);
        }

        $resolvedParams = $call->getReadOnlyResolvedParams($expression['parameters'], $context, $expression);

        $context->headersManager->add('kernel/math');

        return new CompiledExpression(
            'double',
            'zephir_'.$this->getFunctionName().'('.$resolvedParams[0].', '.$resolvedParams[1].' TSRMLS_CC)',
            $expression
        );
    }
98555
function create(context) {
    let defineCalls = 0;

    return {
        CallExpression: function (node) {
            if (isDefineCall(node) && ++defineCalls > 1) {
                context.report(node, message);
            }
        }
    };
}
972032
public function get($functionName, CompilationContext $compilationContext, Call $call, $exists)
    {
        if (isset($this->cache[$functionName])) {
            return $this->cache[$functionName].', '.SlotsCache::getExistingFunctionSlot($functionName);
        }

        if (!$exists) {
            return 'NULL, 0';
        }

        $cacheSlot = SlotsCache::getFunctionSlot($functionName);

        $number = 0;
        if (!$compilationContext->insideCycle) {
            $gatherer = $this->gatherer;
            if ($gatherer) {
                $number = $gatherer->getNumberOfFunctionCalls($functionName);
                if ($number <= 1) {
                    return 'NULL, '.$cacheSlot;
                }
            }
        }

        if ($compilationContext->insideCycle || $number > 1) {
            $functionCacheVariable = $compilationContext->symbolTable->getTempVariableForWrite('zephir_fcall_cache_entry', $compilationContext);
            $functionCacheVariable->setMustInitNull(true);
            $functionCacheVariable->setReusable(false);
            $functionCache = '&'.$functionCacheVariable->getName();
        } else {
            $functionCache = 'NULL';
        }

        $this->cache[$functionName] = $functionCache;

        return $functionCache.', '.$cacheSlot;
    }
426291
public function processExpectedReturn(CompilationContext $compilationContext)
    {
        $expr = $this->expression;
        $expression = $expr->getExpression();

        /**
         * Create temporary variable if needed.
         */
        $mustInit = false;
        $symbolVariable = null;
        $isExpecting = $expr->isExpectingReturn();
        if ($isExpecting) {
            $symbolVariable = $expr->getExpectingVariable();
            if (\is_object($symbolVariable)) {
                $readDetector = new ReadDetector();
                if ($readDetector->detect($symbolVariable->getName(), $expression)) {
                    $symbolVariable = $compilationContext->symbolTable->getTempVariableForWrite(
                        'variable',
                        $compilationContext,
                        $expression
                    );
                } else {
                    $mustInit = true;
                }
            } else {
                $symbolVariable = $compilationContext->symbolTable->getTempVariableForWrite('variable', $compilationContext, $expression);
            }
        }

        $this->mustInit = $mustInit;
        $this->symbolVariable = $symbolVariable;
        $this->isExpecting = $isExpecting;
    }
584328
public function compile(Expression $expr, CompilationContext $compilationContext)
    {
        $expression = $expr->getExpression();

        $methodName = strtolower($expression['name']);

        if (isset($expression['dynamic'])) {
            $dynamicMethod = $expression['dynamic'];
        } else {
            $dynamicMethod = false;
        }

        $symbolVariable = null;

        /**
         * Create temporary variable if needed.
         */
        $mustInit = false;
        $isExpecting = $expr->isExpectingReturn();
        if ($isExpecting) {
            $symbolVariable = $expr->getExpectingVariable();
            if (\is_object($symbolVariable)) {
                $readDetector = new ReadDetector($expression);
                if ($readDetector->detect($symbolVariable->getName(), $expression)) {
                    $symbolVariable = $compilationContext->symbolTable->getTempVariableForObserveOrNullify('variable', $compilationContext, $expression);
                } else {
                    $mustInit = true;
                }
            } else {
                $symbolVariable = $compilationContext->symbolTable->getTempVariableForObserveOrNullify('variable', $compilationContext, $expression);
            }
        }

        /*
         * Method calls only return zvals so we need to validate the target variable is also a zval
         */
        if ($isExpecting) {
            /*
             * At this point, we don't know the exact dynamic type returned by the static method call
             */
            $symbolVariable->setDynamicTypes('undefined');

            if (!$symbolVariable->isVariable()) {
                throw new CompilerException('Returned values by functions can only be assigned to variant variables', $expression);
            }
        }

        /*
         * Include fcall header
         */
        $compilationContext->headersManager->add('kernel/fcall');

        $compiler = $compilationContext->compiler;

        $dynamicClass = $expression['dynamic-class'];
        if (!$dynamicClass) {
            $className = $expression['class'];
            $classDefinition = false;

            if (!\in_array($className, ['self', 'static', 'parent'])) {
                if (\is_string($className)) {
                    $className = $compilationContext->getFullName($className);
                    if ($compiler->isClass($className)) {
                        $classDefinition = $compiler->getClassDefinition($className);
                    } else {
                        if ($compiler->isBundledClass($className)) {
                            $classDefinition = $compiler->getInternalClassDefinition($className);
                        } else {
                            throw new CompilerException('Class name: '.$className.' does not exist', $expression);
                        }
                    }
                } else {
                    foreach ($className as $singleClass) {
                        $className = $compilationContext->getFullName($singleClass);
                        if ($compiler->isClass($singleClass)) {
                            $classDefinition = $compiler->getClassDefinition($singleClass);
                        } else {
                            throw new CompilerException('Class name: '.$className.' does not exist', $expression);
                        }
                    }
                }
            } else {
                if ('parent' == $className) {
                    $classDefinition = $compilationContext->classDefinition;
                    $extendsClass = $classDefinition->getExtendsClass();
                    if (!$extendsClass) {
                        throw new CompilerException('Cannot call method "'.$methodName.'" on parent because class '.$classDefinition->getCompleteName().' does not extend any class', $expression);
                    }
                    $currentClassDefinition = $classDefinition;
                    $classDefinition = $classDefinition->getExtendsClassDefinition();
                } else {
                    $classDefinition = $compilationContext->classDefinition;
                }
            }
        }

        /*
         * Check if the class implements the method
         */
        if (!$dynamicMethod && !$dynamicClass) {
            if (!$classDefinition->hasMethod($methodName)) {
                $possibleMethod = $classDefinition->getPossibleMethodName($methodName);
                if ($possibleMethod) {
                    throw new CompilerException("Class '".$classDefinition->getCompleteName()."' does not implement static method: '".$expression['name']."'. Did you mean '".$possibleMethod."'?", $expression);
                } else {
                    throw new CompilerException("Class '".$classDefinition->getCompleteName()."' does not implement static method: '".$expression['name']."'", $expression);
                }
            } else {
                $method = $classDefinition->getMethod($methodName);

                if ($method->isPrivate() && $method->getClassDefinition() !== $compilationContext->classDefinition) {
                    throw new CompilerException("Cannot call private method '".$methodName."' out of its scope", $expression);
                }

                if (!\in_array($className, ['self', 'static', 'parent'])) {
                    if (!$method->isStatic()) {
                        throw new CompilerException("Cannot call non-static method '".$methodName."' in a static way", $expression);
                    }
                }

                if (!$classDefinition->hasMethod('__callStatic')) {
                    if ($method instanceof ClassMethod && !$method->isBundled()) {
                        /*
                         * Try to produce an exception if method is called with a wrong number of parameters
                         */
                        if (isset($expression['parameters'])) {
                            $callNumberParameters = \count($expression['parameters']);
                        } else {
                            $callNumberParameters = 0;
                        }

                        $classMethod = $classDefinition->getMethod($methodName);
                        $expectedNumberParameters = $classMethod->getNumberOfRequiredParameters();

                        if (!$expectedNumberParameters && $callNumberParameters > 0) {
                            $numberParameters = $classMethod->getNumberOfParameters();
                            if ($callNumberParameters > $numberParameters) {
                                throw new CompilerException("Method '".$classDefinition->getCompleteName().'::'.$expression['name']."' called with a wrong number of parameters, the method has: ".$expectedNumberParameters.', passed: '.$callNumberParameters, $expression);
                            }
                        }

                        if ($callNumberParameters < $expectedNumberParameters) {
                            throw new CompilerException("Method '".$classDefinition->getCompleteName().'::'.$expression['name']."' called with a wrong number of parameters, the method has: ".$expectedNumberParameters.', passed: '.$callNumberParameters, $expression);
                        }
                    }
                } else {
                    if (!isset($method)) {
                        $method = $classDefinition->getMethod('__callStatic');
                        if ($method->isPrivate() && $method->getClassDefinition() !== $compilationContext->classDefinition) {
                            throw new CompilerException("Cannot call private magic method '__call' out of its scope", $expression);
                        }
                    }
                }
            }
        }

        /*
         * Call static methods in the same class, use the special context 'self' or special context 'static'
         * Call static methods in the 'self' context
         */
        if (!$dynamicMethod) {
            if ($dynamicClass) {
                $this->callFromDynamicClass($methodName, $expression, $symbolVariable, $mustInit, $isExpecting, $compilationContext);
            } else {
                if (\in_array($className, ['self', 'static']) || $classDefinition == $compilationContext->classDefinition) {
                    $this->call(strtoupper($className), $methodName, $expression, $symbolVariable, $mustInit, $isExpecting, $classDefinition, $compilationContext, isset($method) ? $method : null);
                } else {
                    if ('parent' == $className) {
                        $this->callParent($methodName, $expression, $symbolVariable, $mustInit, $isExpecting, $currentClassDefinition, $compilationContext, isset($method) ? $method : null);
                    } else {
                        $this->callFromClass($methodName, $expression, $symbolVariable, $mustInit, $isExpecting, $classDefinition, $compilationContext, isset($method) ? $method : null);
                    }
                }
            }
        } else {
            if ($dynamicClass) {
                $this->callFromDynamicClassDynamicMethod($expression, $symbolVariable, $mustInit, $isExpecting, $compilationContext);
            }
        }

        /*
         * Add the last call status to the current symbol table
         */
        $this->addCallStatusFlag($compilationContext);

        /*
         * Transfer the return type-hint to the returned variable
         */
        if ($isExpecting) {
            if (isset($method)) {
                if ($method instanceof ClassMethod) {
                    $returnClassTypes = $method->getReturnClassTypes();
                    if (null !== $returnClassTypes) {
                        $symbolVariable->setDynamicTypes('object');
                        foreach ($returnClassTypes as $classType) {
                            $symbolVariable->setClassTypes($compilationContext->getFullName($classType));
                        }
                    }

                    $returnTypes = $method->getReturnTypes();
                    if (null !== $returnTypes) {
                        foreach ($returnTypes as $dataType => $returnType) {
                            $symbolVariable->setDynamicTypes($dataType);
                        }
                    }
                }
            }
        }

        /*
         * We can mark temporary variables generated as idle here
         */
        foreach ($this->getTemporalVariables() as $tempVariable) {
            $tempVariable->setIdle(true);
        }

        if ($isExpecting) {
            return new CompiledExpression('variable', $symbolVariable->getRealName(), $expression);
        }

        return new CompiledExpression('null', null, $expression);
    }
925885
public function compile(array $expression, CompilationContext $compilationContext)
    {
        $compilationContext->headersManager->add('kernel/array');

        $variable = $compilationContext->symbolTable->getVariableForWrite($expression['left']['value'], $compilationContext, $expression['left']);
        if ('variable' != $variable->getType()) {
            throw new CompilerException('Cannot use variable type: '.$variable->gettype().' in "fetch" operator', $expression);
        }

        /*
         * return_value must not be observed
         */
        if ('return_value' != $variable->getName()) {
            /*
             * @todo use a read detector here
             */
            $readOnly = false;
            $line = max($compilationContext->symbolTable->getLastCallLine(), $compilationContext->symbolTable->getLastUnsetLine());
            if (false === $line || ($line > 0 && $line < $expression['line'])) {
                $numberMutations = $compilationContext->symbolTable->getExpectedMutations($variable->getName());
                if (1 == $numberMutations) {
                    if (1 == $variable->getNumberMutations()) {
                        $variable->setIsInitialized(true, $compilationContext);
                        $variable->setMemoryTracked(false);
                        $variable->setDynamicTypes('undefined');
                        $readOnly = true;
                    }
                }
            }

            if (!$readOnly || 'array-access' != $expression['right']['type']) {
                $variable->setIsInitialized(true, $compilationContext);
                $variable->observeVariant($compilationContext);
                $variable->setDynamicTypes('undefined');
                $variable->setPossibleValue(new CompiledExpression('undefined', '', $expression), $compilationContext);
            }
        } else {
            $variable = $compilationContext->symbolTable->getTempVariableForObserve('variable', $compilationContext);
        }

        if ($readOnly) {
            $flags = '1';
        } else {
            $flags = '0';
        }

        switch ($expression['right']['type']) {
            case 'array-access':
                $exprVariable = new Expression($expression['right']['left']);
                $exprVariable->setReadOnly(true);
                $exprVariable->setNoisy(false);

                $exprCompiledVariable = $exprVariable->compile($compilationContext);
                if ('variable' != $exprCompiledVariable->getType()) {
                    throw new CompilerException('Expression type: '.$exprCompiledVariable->getType().' cannot be used as array', $expression['right']['left']);
                }

                $evalVariable = $compilationContext->symbolTable->getVariableForRead($exprCompiledVariable->getCode(), $compilationContext, $expression['right']['left']);
                if ('variable' != $evalVariable->getType() && 'array' != $evalVariable->getType()) {
                    throw new CompilerException('Variable type: '.$variable->getType().' cannot be used as array', $expression['right']['left']);
                }

                if ('variable' == $evalVariable->getType()) {
                    if ($evalVariable->hasDifferentDynamicType(['undefined', 'array', 'null'])) {
                        $compilationContext->logger->warning(
                            'Possible attempt to use non array in fetch operator',
                            ['non-valid-fetch', $expression['right']]
                        );
                    }
                }

                $expr = new Expression($expression['right']['right']);
                $expr->setReadOnly(true);
                $expr->setNoisy(false);
                $resolvedExpr = $expr->compile($compilationContext);

                return $compilationContext->backend->arrayIssetFetch($variable, $evalVariable, $resolvedExpr, $flags, $expression, $compilationContext);
                break;

            case 'property-access':
                $exprVariable = new Expression($expression['right']['left']);
                $exprVariable->setReadOnly(true);
                $exprVariable->setNoisy(false);

                $exprCompiledVariable = $exprVariable->compile($compilationContext);
                if ('variable' != $exprCompiledVariable->getType()) {
                    throw new CompilerException('Expression type: '.$exprCompiledVariable->getType().' cannot be used as object', $expression['right']['left']);
                }

                $evalVariable = $compilationContext->symbolTable->getVariableForRead($exprCompiledVariable->getCode(), $compilationContext, $expression['right']['left']);
                if ('variable' != $evalVariable->getType()) {
                    throw new CompilerException('Variable type: '.$variable->getType().' cannot be used as object', $expression['right']['left']);
                }

                if ($evalVariable->hasDifferentDynamicType(['undefined', 'object', 'null'])) {
                    $compilationContext->logger->warning(
                        'Possible attempt to use non object in fetch operator',
                        ['non-valid-fetch', $expression['right']]
                    );
                }

                $property = $expression['right']['right']['value'];

                $compilationContext->headersManager->add('kernel/object');
                $symbol = $compilationContext->backend->getVariableCodePointer($variable);
                $evalSymbol = $compilationContext->backend->getVariableCode($evalVariable);

                return new CompiledExpression('bool', 'zephir_fetch_property('.$symbol.', '.$evalSymbol.', SL("'.$property.'"), PH_SILENT_CC)', $expression);

            case 'property-dynamic-access':
                $exprVariable = new Expression($expression['right']['left']);
                $exprVariable->setReadOnly(true);
                $exprVariable->setNoisy(false);

                $exprCompiledVariable = $exprVariable->compile($compilationContext);
                if ('variable' != $exprCompiledVariable->getType()) {
                    throw new CompilerException('Expression type: '.$exprCompiledVariable->getType().' cannot be used as object', $expression['right']['left']);
                }

                $evalVariable = $compilationContext->symbolTable->getVariableForRead($exprCompiledVariable->getCode(), $compilationContext, $expression['right']['left']);
                if ('variable' != $evalVariable->getType()) {
                    throw new CompilerException('Variable type: '.$evalVariable->getType().' cannot be used as object', $expression['right']['left']);
                }

                if ($evalVariable->hasDifferentDynamicType(['undefined', 'object', 'null'])) {
                    $compilationContext->logger->warning(
                        'Possible attempt to use non object in fetch operator',
                        ['non-valid-fetch', $expression['right']]
                    );
                }

                $exprVariableProperty = new Expression($expression['right']['right']);
                $exprVariableProperty->setReadOnly(true);

                $exprCompiledVariableProperty = $exprVariableProperty->compile($compilationContext);
                if ('variable' != $exprCompiledVariableProperty->getType()) {
                    throw new CompilerException('Expression type: '.$exprCompiledVariableProperty->getType().' cannot be used in property-dynamic-access', $expression['right']['right']);
                }

                $evalVariableProperty = $compilationContext->symbolTable->getVariableForRead($exprCompiledVariableProperty->getCode(), $compilationContext, $expression['right']['right']);
                if ('variable' != $evalVariableProperty->getType() && 'string' != $evalVariableProperty->getType()) {
                    throw new CompilerException('Variable type: '.$evalVariableProperty->getType().' cannot be used in property-dynamic-access', $expression['right']['right']);
                }

                $compilationContext->headersManager->add('kernel/object');

                $symbol = $compilationContext->backend->getVariableCodePointer($variable);
                $evalSymbol = $compilationContext->backend->getVariableCode($evalVariable);
                $evalPropertySymbol = $compilationContext->backend->getVariableCode($evalVariableProperty);

                return new CompiledExpression('bool', 'zephir_fetch_property_zval('.$symbol.', '.$evalSymbol.', '.$evalPropertySymbol.', PH_SILENT_CC)', $expression);

            default:
                throw new CompilerException('Cannot use this expression for "fetch" operators: '.$expression['right']['type'], $expression);
        }
    }