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// (C) Copyright Edward Diener 2011-2015,2019
// Use, modification and distribution are subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt).
#include <boost/vmd/is_empty.hpp>
#include <boost/preprocessor/facilities/empty.hpp>
#include <boost/preprocessor/variadic/has_opt.hpp>
#include <boost/detail/lightweight_test.hpp>
int main()
{
#if BOOST_PP_VARIADICS
#define DATA
#define OBJECT OBJECT2
#define OBJECT2
#define FUNC(x) FUNC2(x)
#define FUNC2(x)
BOOST_TEST(BOOST_VMD_IS_EMPTY(BOOST_PP_EMPTY()));
BOOST_TEST(BOOST_VMD_IS_EMPTY(DATA BOOST_PP_EMPTY()));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(x BOOST_PP_EMPTY()));
BOOST_TEST(BOOST_VMD_IS_EMPTY(OBJECT BOOST_PP_EMPTY()));
BOOST_TEST(BOOST_VMD_IS_EMPTY(FUNC(z) BOOST_PP_EMPTY()));
#define FUNC_GEN() ()
#define FUNC_GEN2(x) ()
#define FUNC_GEN3() anything
#define FUNC_GEN4(x) anything
#if BOOST_PP_VARIADIC_HAS_OPT()
#define FUNC_GEN5(x,y) ()
#define FUNC_GEN6(x,y) anything
#define FUNC_GEN7() (y,z)
#define FUNC_GEN5A() (&)
#define FUNC_GEN6A(x) (y)
#define FUNC_GEN7A() (y,z)
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN2));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN5));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN6));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN7));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN5A));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN6A));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN7A));
#elif BOOST_VMD_MSVC
#define FUNC_GEN5(x,y) ()
#define FUNC_GEN6(x,y) anything
/* This shows that VC++ does not work correctly in these cases. */
BOOST_TEST(BOOST_VMD_IS_EMPTY(FUNC_GEN)); /* This produces the wrong result */
BOOST_TEST(BOOST_VMD_IS_EMPTY(FUNC_GEN2)); /* This produces the wrong result */
BOOST_TEST(BOOST_VMD_IS_EMPTY(FUNC_GEN5)); /* This should produce a compiler error but does not and produces the incorrect result */
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN6)); /* This should produce a compiler error but does not */
#else
#define FUNC_GEN5() (&)
#define FUNC_GEN6(x) (y)
#define FUNC_GEN7() (y,z)
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN2));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN5));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN6));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN7));
#endif /* BOOST_VMD_MSVC */
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN3));
BOOST_TEST(!BOOST_VMD_IS_EMPTY(FUNC_GEN4));
#else
BOOST_ERROR("No variadic macro support");
#endif /* BOOST_PP_VARIADICS */
return boost::report_errors();
}
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