DI\Definition\StringDefinition::resolve PHP Method

    public function resolve(ContainerInterface $container)
    {
        $expression = $this->expression;
        $result = preg_replace_callback('#\\{([^\\{\\}]+)\\}#', function (array $matches) use($container) {
            try {
                return $container->get($matches[1]);
            } catch (NotFoundException $e) {
                throw new DependencyException(sprintf("Error while parsing string expression for entry '%s': %s", $this->getName(), $e->getMessage()), 0, $e);
            }
        }, $expression);
        if ($result === null) {
            throw new \RuntimeException(sprintf('An unknown error occurred while parsing the string definition: \'%s\'', $expression));
        }
        return $result;
    }