to_string fixes

[SVN r44164]

test/to_string_stub_test.cpp

@@ -0,0 +1,98 @@
+//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_stub.hpp>
+#include <boost/detail/lightweight_test.hpp>
+#include <iostream>
+
+namespace
+n1
+    {
+    class
+    c1
+        {
+        };
+
+    std::string
+    to_string( c1 const & )
+        {
+        return "c1";
+        }           
+    }
+
+namespace
+n2
+    {
+    class
+    c2
+        {
+        };
+
+    std::ostream &
+    operator<<( std::ostream & s, c2 const & )
+        {
+        s << "c2";
+        return s;
+        }           
+    }
+
+namespace
+n3
+    {
+    class
+    c3
+        {
+        };
+
+    std::ostream &
+    operator<<( std::ostream & s, c3 const & )
+        {
+        s << "bad";
+        return s;
+        }           
+
+    std::string
+    to_string( c3 const & )
+        {
+        return "c3";
+        }           
+    }
+
+namespace
+boost
+    {
+    class
+    to_string_tester
+        {
+        };
+    }
+
+template <class T>
+struct
+my_stub
+    {
+    std::string
+    operator()( T const & )
+        {
+        return "stub";
+        }
+    };
+
+int
+main()
+    {
+    using namespace boost;
+    BOOST_TEST( to_string(42)=="42" );
+    BOOST_TEST( to_string(n1::c1())=="c1" );
+    BOOST_TEST( to_string(n2::c2())=="c2" );
+    BOOST_TEST( to_string(n3::c3())=="c3" );
+    BOOST_TEST( to_string_stub(42)=="42" );
+    BOOST_TEST( to_string_stub(n1::c1())=="c1" );
+    BOOST_TEST( to_string_stub(n2::c2())=="c2" );
+    BOOST_TEST( to_string_stub(n3::c3())=="c3" );
+    BOOST_TEST( to_string_stub(to_string_tester(),my_stub<to_string_tester>())=="stub" );
+    BOOST_TEST( !to_string_stub(to_string_tester()).empty() );
+    return boost::report_errors();
+    }