fk u, msvc.

Author: SekaiArendelle

include/fast_io_dsal/impl/misc/pop_macros.h

@@ -1,5 +1,6 @@
 // Please keep it in reverse order with the macros in push_macros.h
 
+#pragma pop_macro("FAST_IO_CPP_EXCEPTIONS")
 #pragma pop_macro("FAST_IO_HAS_BUILTIN")
 #pragma pop_macro("FAST_IO_TRIVIALLY_RELOCATABLE_IF_ELIGIBLE")
 #pragma pop_macro("FAST_IO_ASSERT")

include/fast_io_dsal/impl/misc/push_macros.h

@@ -220,7 +220,19 @@ Internal assert macros for fuzzing fast_io.
 #pragma push_macro("FAST_IO_HAS_BUILTIN")
 #undef FAST_IO_HAS_BUILTIN
 #ifdef __has_builtin
-# define FAST_IO_HAS_BUILTIN(...) __has_builtin(__VA_ARGS__)
+#define FAST_IO_HAS_BUILTIN(...) __has_builtin(__VA_ARGS__)
 #else
-# define FAST_IO_HAS_BUILTIN(...) 0
+#define FAST_IO_HAS_BUILTIN(...) 0
+#endif
+
+#pragma push_macro("FAST_IO_CPP_EXCEPTIONS")
+#undef FAST_IO_CPP_EXCEPTIONS
+#if defined (_MSC_VER) && !defined(__clang__)
+#if defined(_CPPUNWIND)
+#define FAST_IO_CPP_EXCEPTIONS
+#endif
+#else
+#if __cpp_exceptions >= 199711L
+#define FAST_IO_CPP_EXCEPTIONS
+#endif
 #endif

include/fast_io_freestanding_impl/io_buffer/destroy.h

@@ -37,13 +37,13 @@ inline constexpr void destroy_basic_io_buffer(T &t) noexcept
 	constexpr auto mode{traits_type::mode};
 	if constexpr ((mode & buffer_mode::out) == buffer_mode::out)
 	{
-#if __cpp_exceptions >= 199711L
+#ifdef FAST_IO_CPP_EXCEPTIONS
 		try
-#endif
 		{
+#endif
 			::fast_io::details::close_basic_io_buffer(t);
+#ifdef FAST_IO_CPP_EXCEPTIONS
 		}
-#if __cpp_exceptions >= 199711L
 		catch (...)
 		{
 		}