Mark platform-specific error headers as deprecated; split tests

test/windows_error_test.cpp

@@ -0,0 +1,31 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/system/windows_error.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if !defined(BOOST_WINDOWS_API)
+
+BOOST_PRAGMA_MESSAGE( "Skipping test, BOOST_WINDOWS_API is not defined" )
+int main() {}
+
+#else
+
+#include <boost/core/lightweight_test.hpp>
+#include <windows.h>
+
+int main()
+{
+    namespace sys = boost::system;
+
+    sys::error_code ec = sys::windows_error::invalid_function;
+
+    BOOST_TEST_EQ( ec, sys::windows_error::invalid_function );
+    BOOST_TEST_EQ( ec, sys::error_code( ERROR_INVALID_FUNCTION, sys::system_category() ) );
+    BOOST_TEST( ec == make_error_condition( sys::errc::function_not_supported ) );
+
+    return boost::report_errors();
+}
+
+#endif