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Diffstat (limited to 'boost/vmd/assert_is_empty.hpp')
-rw-r--r-- | boost/vmd/assert_is_empty.hpp | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/boost/vmd/assert_is_empty.hpp b/boost/vmd/assert_is_empty.hpp new file mode 100644 index 0000000000..712f67fac6 --- /dev/null +++ b/boost/vmd/assert_is_empty.hpp @@ -0,0 +1,105 @@ + +// (C) Copyright Edward Diener 2011-2015 +// 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). + +#if !defined(BOOST_VMD_ASSERT_IS_EMPTY_HPP) +#define BOOST_VMD_ASSERT_IS_EMPTY_HPP + +#include <boost/vmd/detail/setup.hpp> + +#if BOOST_PP_VARIADICS + +#if BOOST_VMD_ASSERT_DATA + +#include <boost/vmd/assert.hpp> +#include <boost/vmd/is_empty.hpp> + +#endif + +/* + + The succeeding comments in this file are in doxygen format. + +*/ + +/** \file +*/ + +/** \def BOOST_VMD_ASSERT_IS_EMPTY(...) + + \brief Asserts that the input is empty. + + The macro checks to see if the input is empty or not. + If it is not empty, it forces a compiler error. + + The macro is a variadic macro taking any input. + For the VC++8 compiler (VS2005) the macro takes a single parameter of input to check and not variadic data. + + The macro normally checks for emptiness only in + debug mode. However an end-user can force the macro + to check or not check by defining the macro + BOOST_VMD_ASSERT_DATA to 1 or 0 respectively. + + .... = variadic input, for VC++8 this must be a single parameter. + + returns = Normally the macro returns nothing. + + If the input is empty, nothing is output. + + For VC++, because there is no sure way of forcing + a compiler error from within a macro without producing + output, if the input is not empty the + macro forces a compiler error by outputting invalid C++. + + For all other compilers a compiler error is forced + without producing output if the input is not empty. + + It is recommended to append BOOST_PP_EMPTY() to whatever input + is being tested in order to avoid possible warning messages + from some compilers about no parameters being passed to the macro + when the input is truly empty. + +*/ + +#if BOOST_VMD_MSVC_V8 + +#if !BOOST_VMD_ASSERT_DATA + +#define BOOST_VMD_ASSERT_IS_EMPTY(input) + +#else + +#define BOOST_VMD_ASSERT_IS_EMPTY(input) \ + BOOST_VMD_ASSERT \ + ( \ + BOOST_VMD_IS_EMPTY(input), \ + BOOST_VMD_IS_EMPTY_ASSERT_ERROR \ + ) \ +/**/ + +#endif // !BOOST_VMD_ASSERT_DATA + +#else + +#if !BOOST_VMD_ASSERT_DATA + +#define BOOST_VMD_ASSERT_IS_EMPTY(...) + +#else + +#define BOOST_VMD_ASSERT_IS_EMPTY(...) \ + BOOST_VMD_ASSERT \ + ( \ + BOOST_VMD_IS_EMPTY(__VA_ARGS__), \ + BOOST_VMD_IS_EMPTY_ASSERT_ERROR \ + ) \ +/**/ + +#endif // !BOOST_VMD_ASSERT_DATA + +#endif /* BOOST_VMD_MSVC_V8 */ + +#endif /* BOOST_PP_VARIADICS */ +#endif /* BOOST_VMD_ASSERT_IS_EMPTY_HPP */ |