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stream_insert.cpp

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// 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_1( T const& t )

{

using namespace boost::lambda2;

std::ostringstream os;

( std::ref( os ) << _1 )( t );

return os.str();

}

template<class T> std::string to_string_2( T const& t )

{

using namespace boost::lambda2;

std::ostringstream os;

( os << _1 )( t );

return os.str();

}

int main()

{

BOOST_TEST_EQ( to_string_1( 123 ), "123" );

BOOST_TEST_EQ( to_string_2( 456 ), "456" );

return boost::report_errors();

}