From 93bbdb4a880fb8e9ba577b0f5e8dab4e8a1e704b Mon Sep 17 00:00:00 2001
From: Jinhao <cnjinhao@hotmail.com>
Date: Fri, 31 Aug 2018 01:21:45 +0800
Subject: [PATCH] fix bug that a linkage error caused by VC2017v15.8

---
 include/nana/gui/drawing.hpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/nana/gui/drawing.hpp b/include/nana/gui/drawing.hpp
index 06ecece6..d7f7c7be 100644
--- a/include/nana/gui/drawing.hpp
+++ b/include/nana/gui/drawing.hpp
@@ -23,9 +23,10 @@ namespace nana
 	class drawing
 		:private nana::noncopyable
 	{
+		struct draw_fn_handle;
 	public:
-		typedef struct{}* diehard_t;                                ///< A handle to a drawing method
-		typedef std::function<void(paint::graphics&)> draw_fn_t;    ///< A function to draw
+		using diehard_t = draw_fn_handle * ;						///< A handle to a drawing method
+		using draw_fn_t = std::function<void(paint::graphics&)>;    ///< A function to draw
 
 		drawing(window w);              ///< Create a drawing object for a widget w