From c28a40388b188221abc64de7f2ba52a7f4ffd448 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 16 Dec 2017 18:05:09 +0000
Subject: Provide an internal helper for calling member functions via libfuse

---
 netfs/fuse/fuseAppBase.cpp | 2 +-
 netfs/fuse/fuseAppBase.h   | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/netfs/fuse/fuseAppBase.cpp b/netfs/fuse/fuseAppBase.cpp
index fc6fa14..f0d6b52 100644
--- a/netfs/fuse/fuseAppBase.cpp
+++ b/netfs/fuse/fuseAppBase.cpp
@@ -224,7 +224,7 @@ FuseAppBase::runint(int argc, char ** argv)
 	fuseApp = this;
 	struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
 	if (fuse_opt_parse(&args, fuseApp, fuse_opts,
-			&helper<decltype(&FuseAppBase::opt_parse), &FuseAppBase::opt_parse>) == -1) {
+			&internalHelper<decltype(&FuseAppBase::opt_parse), &FuseAppBase::opt_parse>) == -1) {
 		exit(1);
 	}
 	return args;
diff --git a/netfs/fuse/fuseAppBase.h b/netfs/fuse/fuseAppBase.h
index 4128c6b..daa8cb1 100644
--- a/netfs/fuse/fuseAppBase.h
+++ b/netfs/fuse/fuseAppBase.h
@@ -170,6 +170,11 @@ class DLL_PUBLIC FuseAppBase {
 				}
 			}
 		}
+		template <typename Func, Func f, typename ... Args>
+		static int internalHelper(Args ... a)
+		{
+			return (fuseApp->*f)(a...);
+		}
 
 		static FuseAppBase * fuseApp;
 };
-- 
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