Zephir\Compiler::calculateDependencies PHP Method

    public function calculateDependencies($files, $_dependency = null)
    {
        /**
         * Classes are ordered according to a dependency ranking
         * Classes with higher rank, need to be initialized first
         * We first build a dependency tree and then set the rank accordingly
         */
        if ($_dependency == null) {
            $dependencyTree = array();
            foreach ($files as $file) {
                if (!$file->isExternal()) {
                    $classDefinition = $file->getClassDefinition();
                    $dependencyTree[$classDefinition->getCompleteName()] = $classDefinition->getDependencies();
                }
            }
            /* Make sure the dependencies are loaded first (recursively) */
            foreach ($dependencyTree as $className => $dependencies) {
                foreach ($dependencies as $dependency) {
                    $dependency->increaseDependencyRank(0);
                    $this->calculateDependencies($dependencyTree, $dependency);
                }
            }
            return;
        }
        $dependencyTree = $files;
        if (isset($dependencyTree[$_dependency->getCompleteName()])) {
            foreach ($dependencyTree[$_dependency->getCompleteName()] as $dependency) {
                $dependency->increaseDependencyRank(0);
                $this->calculateDependencies($dependencyTree, $dependency);
            }
        }
    }