1 /*============================================================================= 2 Boost.Wave: A Standard compliant C++ preprocessor library 3 http://www.boost.org/ 4 5 Copyright (c) 2020 Jeff Trull. Distributed under the Boost 6 Software License, Version 1.0. (See accompanying file 7 LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 8 =============================================================================*/ 9 10 //O --c++20 11 //O -Werror 12 13 // test that __VA_OPT__ cannot be used as a function-like macro 14 15 //E t_8_006.cpp(16): error: __VA_OPT__ can only appear in the expansion of a C++20 variadic macro: __VA_OPT__ 16 #define __VA_OPT__(FOO, BAR) FOO BAR 17