From 1f76fbd168a9db5ffee39e33b751da81704bbc8d Mon Sep 17 00:00:00 2001
From: Anna Gringauze <annagrin@microsoft.com>
Date: Tue, 31 Jul 2018 17:30:43 -0700
Subject: [PATCH] Dev/annagrin/failfast in noexcept mode windows (#710)

made terminate call __fastfail in noexcept mode when using msvc
---
 include/gsl/gsl_assert | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/gsl/gsl_assert b/include/gsl/gsl_assert
index 131fa8b..be4676b 100644
--- a/include/gsl/gsl_assert
+++ b/include/gsl/gsl_assert
@@ -26,6 +26,8 @@
 //
 #if defined(_MSC_VER) && defined(_HAS_EXCEPTIONS) && !_HAS_EXCEPTIONS
 #define GSL_MSVC_USE_STL_NOEXCEPTION_WORKAROUND
+#include <intrin.h>
+#define RANGE_CHECKS_FAILURE 0
 #endif
 
 //
@@ -82,10 +84,15 @@ namespace details
 #if defined(GSL_MSVC_USE_STL_NOEXCEPTION_WORKAROUND)
 
     typedef void  (__cdecl *terminate_handler)();
+    
+    [[noreturn]] inline void __cdecl default_terminate_handler()
+    {
+        __fastfail(RANGE_CHECKS_FAILURE);
+    }
 
     inline gsl::details::terminate_handler& get_terminate_handler() noexcept
     {
-        static terminate_handler handler = &abort;
+        static terminate_handler handler = &default_terminate_handler;
         return handler;
     }