Special-case streams in operator<< and operator>>

test/stream_insert.cpp

@@ -0,0 +1,26 @@
+// Copyright 2021 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/lambda2.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <sstream>
+#include <string>
+
+template<class T> std::string to_string( T const& t )
+{
+    using namespace boost::lambda2;
+
+    std::ostringstream os;
+
+    ( os << _1 )( t );
+
+    return os.str();
+}
+
+int main()
+{
+    BOOST_TEST_EQ( to_string( 123 ), "123" );
+
+    return boost::report_errors();
+}