Boost Exception

In other libraries, watch for compile error referring to throw_exception_assert_compatibility in boost::throw_exception. Resolve by throwing an exception that derives from std::exception. This is not a new requirement but it is being enforced now.

[SVN r46818]

test/has_to_string_test.cpp

@@ -0,0 +1,57 @@
+//Copyright (c) 2006-2008 Emil Dotchevski and Reverge Studios, Inc.
+
+//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 <boost/exception/to_string.hpp>
+#include <boost/detail/lightweight_test.hpp>
+
+namespace
+n1
+    {
+    struct
+    c1
+        {
+        };
+    }
+
+namespace
+n2
+    {
+    struct
+    c2
+        {
+        };
+
+    std::string
+    to_string( c2 const & )
+        {
+        return "c2";
+        }           
+    }
+
+namespace
+n3
+    {
+    struct
+    c3
+        {
+        };
+
+    std::ostream &
+    operator<<( std::ostream & s, c3 const & )
+        {
+        return s << "c3";
+        }           
+    }
+
+int
+main()
+    {
+    using namespace boost;
+    BOOST_TEST( !has_to_string<n1::c1>::value );
+    BOOST_TEST( has_to_string<n2::c2>::value );
+    BOOST_TEST( has_to_string<n3::c3>::value );
+    BOOST_TEST( has_to_string<int>::value );
+    return boost::report_errors();
+    }