Imported from /home/lorry/working-area/delta_boost-tarball/boost_1_54_0.tar.bz2.boost_1_54_0baserock/morph

1 files changed, 26 insertions, 0 deletions

diff --git a/libs/local_function/test/addable.hpp b/libs/local_function/test/addable.hpp
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+
+// Copyright (C) 2009-2012 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)
+// Home at http://www.boost.org/libs/local_function
+
+#ifndef ADDABLE_HPP_
+#define ADDABLE_HPP_
+
+#include <boost/concept_check.hpp>
+
+template<typename T>
+struct Addable { // User-defined concept.
+    BOOST_CONCEPT_USAGE(Addable) {
+        return_type(x + y); // Check addition `T operator+(T x, T y)`.
+    }
+
+private:
+    void return_type(T) {} // Implementation (required for some linkers).
+    static T const& x;
+    static T const& y;
+};
+
+#endif // #include guard
+