#include <regex>
#include <type_traits>
#include <cassert>
int main()
{
{
typedef std::sub_match<char*> SM;
static_assert((std::is_same<SM::iterator, char*>::value), "");
static_assert((std::is_same<SM::value_type, char>::value), "");
static_assert((std::is_same<SM::difference_type, std::ptrdiff_t>::value), "");
static_assert((std::is_same<SM::string_type, std::string>::value), "");
static_assert((std::is_convertible<SM*, std::pair<char*, char*>*>::value), "");
SM sm;
sm.first = nullptr;
sm.second = nullptr;
sm.matched = false;
}
{
typedef std::sub_match<wchar_t*> SM;
static_assert((std::is_same<SM::iterator, wchar_t*>::value), "");
static_assert((std::is_same<SM::value_type, wchar_t>::value), "");
static_assert((std::is_same<SM::difference_type, std::ptrdiff_t>::value), "");
static_assert((std::is_same<SM::string_type, std::wstring>::value), "");
static_assert((std::is_convertible<SM*, std::pair<wchar_t*, wchar_t*>*>::value), "");
SM sm;
sm.first = nullptr;
sm.second = nullptr;
sm.matched = false;
}
{
static_assert((std::is_same<std::csub_match, std::sub_match<const char*> >::value), "");
static_assert((std::is_same<std::wcsub_match, std::sub_match<const wchar_t*> >::value), "");
static_assert((std::is_same<std::ssub_match, std::sub_match<std::string::const_iterator> >::value), "");
static_assert((std::is_same<std::wssub_match, std::sub_match<std::wstring::const_iterator> >::value), "");
}
}