From d8f916a25ba953fabc29806fead2dd4a9e5d4d2d Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Tue, 14 Aug 2018 16:47:59 +1000
Subject: [PATCH] win32: add except::try_func

---
 win32/except.hpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/win32/except.hpp b/win32/except.hpp
index 8cc160da..dde8ead2 100644
--- a/win32/except.hpp
+++ b/win32/except.hpp
@@ -11,6 +11,8 @@
 #define CRUFT_UTIL_WIN32_EXCEPT_HPP
 
 #include <stdexcept>
+#include <functional>
+
 #include <windows.h>
 
 namespace cruft::win32 {
@@ -22,6 +24,18 @@ namespace cruft::win32 {
         DWORD code (void) const;
         static DWORD last_code (void);
 
+        template <typename FunctionT, typename ...ArgsT>
+        static decltype(auto)
+        try_call (FunctionT &&func, ArgsT &&...args)
+        {
+            return try_value (
+                std::invoke (
+                    std::forward<FunctionT> (func),
+                    std::forward<ArgsT> (args)...
+                )
+            );
+        }
+
         static HANDLE try_value (HANDLE);
 
         static void try_code (void);