vfs: Move forward declarations to separate file

src/core/file_sys/vfs.h

@@ -12,20 +12,12 @@
 #include <vector>
 #include <boost/optional.hpp>
 #include "common/common_types.h"
+#include "core/file_sys/vfs_types.h"
 
 namespace FileSys {
 
-class VfsDirectory;
-class VfsFile;
-class VfsFilesystem;
-
 enum class Mode : u32;
 
-// Convenience typedefs to use Vfs* interfaces
-using VirtualFilesystem = std::shared_ptr<VfsFilesystem>;
-using VirtualDir = std::shared_ptr<VfsDirectory>;
-using VirtualFile = std::shared_ptr<VfsFile>;
-
 // An enumeration representing what can be at the end of a path in a VfsFilesystem
 enum class VfsEntryType {
     None,

src/core/file_sys/vfs_types.h

@@ -0,0 +1,21 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+
+namespace FileSys {
+
+class VfsDirectory;
+class VfsFile;
+class VfsFilesystem;
+
+// Declarations for Vfs* pointer types
+
+using VirtualDir = std::shared_ptr<VfsDirectory>;
+using VirtualFile = std::shared_ptr<VfsFile>;
+using VirtualFilesystem = std::shared_ptr<VfsFilesystem>;
+
+} // namespace FileSys