add boost on mac

macx64/include/boost/safe_numerics/native.hpp

@@ -0,0 +1,110 @@
+#ifndef BOOST_NUMERIC_NATIVE_HPP
+#define BOOST_NUMERIC_NATIVE_HPP
+
+//  Copyright (c) 2012 Robert Ramey
+//
+// 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)
+
+#include <type_traits>
+#include <limits>
+
+// policy which creates results types and values equal to that of C++ promotions.
+// When used in conjunction with a desired exception policy, traps errors but
+// does not otherwise alter the results produced by the program using it.
+namespace boost {
+namespace safe_numerics {
+
+struct native {
+public:
+    // arithmetic operators
+    template<typename T, typename U>
+    struct addition_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            + typename base_type<U>::type()
+        );
+    };
+    template<typename T, typename U>
+    struct subtraction_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            - typename base_type<U>::type()
+        );
+    };
+    template<typename T, typename U>
+    struct multiplication_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            * typename base_type<U>::type()
+        );
+    };
+    template<typename T, typename U>
+    struct division_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            / typename base_type<U>::type()
+        );
+    };
+    template<typename T, typename U>
+    struct modulus_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            % typename base_type<U>::type()
+        );
+    };
+    // note: comparison_result (<, >, ...) is special.
+    // The return value is always a bool.  The type returned here is
+    // the intermediate type applied to make the values comparable.
+    template<typename T, typename U>
+    struct comparison_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            + typename base_type<U>::type()
+        );
+    };
+
+    // shift operators
+    template<typename T, typename U>
+    struct left_shift_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            << typename base_type<U>::type()
+        );
+    };
+    template<typename T, typename U>
+    struct right_shift_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            >> typename base_type<U>::type()
+        );
+    };
+    // bitwise operators
+    template<typename T, typename U>
+    struct bitwise_or_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            | typename base_type<U>::type()
+        );
+    };
+    template<typename T, typename U>
+    struct bitwise_and_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            & typename base_type<U>::type()
+        );
+    };
+    template<typename T, typename U>
+    struct bitwise_xor_result {
+        using type = decltype(
+            typename base_type<T>::type()
+            ^ typename base_type<U>::type()
+        );
+    };
+};
+
+} // safe_numerics
+} // boost
+
+#endif // BOOST_NUMERIC_NATIVE_HPP