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Diffstat (limited to 'boost/config/helper_macros.hpp')
| -rw-r--r-- | boost/config/helper_macros.hpp | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/boost/config/helper_macros.hpp b/boost/config/helper_macros.hpp new file mode 100644 index 0000000000..3e79526df6 --- /dev/null +++ b/boost/config/helper_macros.hpp @@ -0,0 +1,37 @@ +#ifndef BOOST_CONFIG_HELPER_MACROS_HPP_INCLUDED +#define BOOST_CONFIG_HELPER_MACROS_HPP_INCLUDED + +// Copyright 2001 John Maddock. +// Copyright 2017 Peter Dimov. +// +// Distributed under 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 +// +// BOOST_STRINGIZE(X) +// BOOST_JOIN(X, Y) +// +// Note that this header is C compatible. + +// +// Helper macro BOOST_STRINGIZE: +// Converts the parameter X to a string after macro replacement +// on X has been performed. +// +#define BOOST_STRINGIZE(X) BOOST_DO_STRINGIZE(X) +#define BOOST_DO_STRINGIZE(X) #X + +// +// Helper macro BOOST_JOIN: +// The following piece of macro magic joins the two +// arguments together, even when one of the arguments is +// itself a macro (see 16.3.1 in C++ standard). The key +// is that macro expansion of macro arguments does not +// occur in BOOST_DO_JOIN2 but does in BOOST_DO_JOIN. +// +#define BOOST_JOIN(X, Y) BOOST_DO_JOIN(X, Y) +#define BOOST_DO_JOIN(X, Y) BOOST_DO_JOIN2(X,Y) +#define BOOST_DO_JOIN2(X, Y) X##Y + +#endif // BOOST_CONFIG_HELPER_MACROS_HPP_INCLUDED |