#include <boost/core/identity.hpp>
#include <boost/core/lightweight_test.hpp>
#include <algorithm>
#include <iterator>
#include <string>
#include <vector>
bool test(std::string&)
{
return true;
}
bool test(const std::string&)
{
return true;
}
template<class T>
bool test(T&)
{
return false;
}
template<class T>
bool test(const T&)
{
return false;
}
void simple_test()
{
std::string s1("a");
BOOST_TEST(boost::identity()(s1) == s1);
BOOST_TEST(&boost::identity()(s1) == &s1);
BOOST_TEST(test(boost::identity()(s1)));
const std::string s2("a");
BOOST_TEST(boost::identity()(s2) == s2);
BOOST_TEST(&boost::identity()(s2) == &s2);
BOOST_TEST(test(boost::identity()(s2)));
}
void algorithm_test()
{
std::vector<std::string> v1;
v1.push_back(std::string("a"));
v1.push_back(std::string("b"));
v1.push_back(std::string("c"));
std::vector<std::string> v2;
std::transform(v1.begin(), v1.end(), std::back_inserter(v2),
boost::identity());
BOOST_TEST(v2 == v1);
}
int main()
{
simple_test();
algorithm_test();
return boost::report_errors();
}