add boost on mac

macx64/include/boost/contract.hpp

@@ -0,0 +1,44 @@
+
+#ifndef BOOST_CONTRACT_HPP_
+#define BOOST_CONTRACT_HPP_
+
+// Copyright (C) 2008-2018 Lorenzo Caminiti
+// Distributed under the Boost Software License, Version 1.0 (see accompanying
+// file LICENSE_1_0.txt or a copy at http://www.boost.org/LICENSE_1_0.txt).
+// See: http://www.boost.org/doc/libs/release/libs/contract/doc/html/index.html
+
+/** @file
+Include all header files required by this library at once (for convenience).
+
+All header files <c>boost/contract/\*.hpp</c> are independent from one another
+and can be included one-by-one to reduce the amount of code to compile from this
+library in user code (but this was measured to not make an appreciable
+difference in compile-time so <c>boost/contract.hpp</c> can be included directly
+in most cases).
+Instead the headers <c>boost/contract/core/\*.hpp</c> are not independent from
+other library headers and they are automatically included by the
+<c>boost/contract/\*.hpp</c> headers (so the <c>boost/contract/core/\*.hpp</c>
+headers are usually not directly included by programmers).
+
+All files under the <c>boost/contract/detail/</c> directory, names within the
+@c boost::contract::detail namespace, names prefixed with
+@c boost_contract_detail... and @c BOOST_CONTRACT_DETAIL... (in any namesapce,
+including user's code) are reserved for internal use of this library and should
+never be used directly by programmers.
+
+@see @RefSect{getting_started, Getting Started}
+*/
+
+#include <boost/contract/assert.hpp>
+#include <boost/contract/base_types.hpp>
+#include <boost/contract/call_if.hpp>
+#include <boost/contract/constructor.hpp>
+#include <boost/contract/destructor.hpp>
+#include <boost/contract/function.hpp>
+#include <boost/contract/check.hpp>
+#include <boost/contract/old.hpp>
+#include <boost/contract/override.hpp>
+#include <boost/contract/public_function.hpp>
+
+#endif // #include guard
+