add boost on mac

macx64/include/boost/contract/detail/check.hpp

@@ -0,0 +1,48 @@
+
+#ifndef BOOST_CONTRACT_DETAIL_CHECK_HPP_
+#define BOOST_CONTRACT_DETAIL_CHECK_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
+
+#include <boost/contract/core/config.hpp> 
+#ifndef BOOST_CONTRACT_NO_CHECKS
+    #include <boost/contract/core/exception.hpp>
+
+    /* PRIVATE */
+
+    #ifndef BOOST_CONTRACT_ALL_DISABLE_NO_ASSERTION
+        #include <boost/contract/detail/checking.hpp>
+        #include <boost/contract/detail/name.hpp>
+
+        #define BOOST_CONTRACT_CHECK_IF_NOT_CHECKING_ALREADY_ \
+            if(!boost::contract::detail::checking::already())
+        #define BOOST_CONTRACT_CHECK_CHECKING_VAR_(guard) \
+            /* this name somewhat unique to min var shadow warnings */ \
+            boost::contract::detail::checking BOOST_CONTRACT_DETAIL_NAME2( \
+                    guard, __LINE__);
+    #else
+        #define BOOST_CONTRACT_CHECK_IF_NOT_CHECKING_ALREADY_ /* nothing */
+        #define BOOST_CONTRACT_CHECK_CHECKING_VAR_(guard) /* nothing */
+    #endif
+    
+    /* PUBLIC */
+    
+    #define BOOST_CONTRACT_DETAIL_CHECK(assertion) \
+        { \
+            try { \
+                BOOST_CONTRACT_CHECK_IF_NOT_CHECKING_ALREADY_ \
+                { \
+                    BOOST_CONTRACT_CHECK_CHECKING_VAR_(k) \
+                    { assertion; } \
+                } \
+            } catch(...) { boost::contract::check_failure(); } \
+        }
+#else
+    #define BOOST_CONTRACT_DETAIL_CHECK(assertion) {}
+#endif
+
+#endif // #include guard
+