Added GetAll function to config file that returns a list of all top level keys in a config file

include/Engine/Core/ConfigFile.h

@@ -5,6 +5,7 @@
 #include <boost/filesystem.hpp>
 #include <boost/property_tree/ptree.hpp>
 #include <boost/property_tree/ini_parser.hpp>
+#include <boost/lexical_cast.hpp>
 
 #include "../Common.h"
 #include "ResourceManager.h"
@@ -19,12 +20,14 @@ private:
 public:
 	template <typename T>
 	T Get(std::string key, T defaultValue);
+    template <typename T>
+    std::vector<std::pair<std::string, T>> GetAll(std::string key);
 	template <typename T>
 	void Set(std::string key, T value);
 
 	void SaveToDisk();
 
-	private:
+private:
 	boost::filesystem::path m_Path;
 	boost::property_tree::ptree m_PTreeDefaults;
 	boost::property_tree::ptree m_PTreeOverrides;
@@ -37,6 +40,21 @@ T ConfigFile::Get(std::string key, T defaultValue)
 	return m_PTreeMerged.get<T>(key, defaultValue);
 }
 
+template <typename T>
+std::vector<std::pair<std::string, T>> ConfigFile::GetAll(std::string key)
+{
+    std::vector<std::pair<std::string, T>> out;
+    auto parent = m_PTreeMerged.find(key);
+    if (parent == m_PTreeMerged.not_found()) {
+        return out;
+    }
+    for (auto& child : parent->second) {
+        T value = boost::lexical_cast<T>(child.second.data());
+        out.push_back(std::make_pair(child.first, value));
+    }
+    return out;
+}
+
 template <typename T>
 void ConfigFile::Set(std::string key, T value)
 {