Added getAllPaths() method to get combined results from stacked adapters.

source/mijin/platform/folders.hpp

@@ -4,8 +4,10 @@
 #define MIJIN_PLATFORM_FOLDERS_HPP_INCLUDED 1
 
 #include "../internal/common.hpp"
+#include "../util/flag.hpp"
 
 #include <filesystem>
+#include <vector>
 
 namespace fs = std::filesystem;
 
@@ -20,8 +22,19 @@ enum class KnownFolder
     USER_DATA_ROOT
 };
 
+MIJIN_DEFINE_FLAG(IncludeUser);
+MIJIN_DEFINE_FLAG(IncludeSystem);
+
 [[nodiscard]]
 fs::path getKnownFolder(KnownFolder folder) MIJIN_NOEXCEPT;
+
+[[nodiscard]]
+std::vector<fs::path> getAllConfigFolders(IncludeUser includeUser = IncludeUser::YES,
+                                          IncludeSystem includeSystem = IncludeSystem::YES) MIJIN_NOEXCEPT;
+
+[[nodiscard]]
+std::vector<fs::path> getAllDataFolders(IncludeUser includeUser = IncludeUser::YES,
+                                          IncludeSystem includeSystem = IncludeSystem::YES) MIJIN_NOEXCEPT;
 }
 
 #endif // defined(MIJIN_PLATFORM_FOLDERS_HPP_INCLUDED)