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#include <iostream>
#include <string>
#include <iomanip>
 
template <typename CharT>
void test() {
	struct Destructible_ctype : public std::ctype<CharT>
    {
      Destructible_ctype(std::size_t refs = 0) {}
      // note: the implicit destructor is public
    } dc;
 
	{
		std::basic_ostringstream<CharT> oss;
		oss << 123;
		std::cerr << oss.str().size() << std::endl;
	}
	{
		std::basic_ostringstream<CharT> oss;
		oss << 1234.56;
		std::cerr << oss.str().size() << std::endl;
	}
	{
		std::basic_ostringstream<CharT> oss;
		oss << std::setfill(CharT(' '));
		// oss << 123;
		std::cerr << oss.str().size() << std::endl;
	}
}
 
int main()
{
	std::cerr << "char:" << std::endl;
	test<char>();
	std::cerr << std::endl;
	std::cerr << "wchar_t:" << std::endl;
	test<wchar_t>();
	std::cerr << std::endl;
	std::cerr << "char32_t:" << std::endl;
	test<char32_t>();
	std::cerr << std::endl;
}

/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o: in function `test<char32_t>()::Destructible_ctype::~Destructible_ctype()':
prog.cpp:(.text._ZZ4testIDiEvvEN18Destructible_ctypeD2Ev[_ZZ4testIDiEvvEN18Destructible_ctypeD5Ev]+0xb): undefined reference to `std::ctype<char32_t>::~ctype()'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o: in function `test<char32_t>()::Destructible_ctype::~Destructible_ctype()':
prog.cpp:(.text._ZZ4testIDiEvvEN18Destructible_ctypeD0Ev[_ZZ4testIDiEvvEN18Destructible_ctypeD5Ev]+0xf): undefined reference to `std::ctype<char32_t>::~ctype()'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o: in function `void test<char32_t>()':
prog.cpp:(.text._Z4testIDiEvv[_Z4testIDiEvv]+0x8ea): undefined reference to `std::ctype<char32_t>::~ctype()'
/usr/bin/ld: prog.cpp:(.text._Z4testIDiEvv[_Z4testIDiEvv]+0xb2c): undefined reference to `std::ctype<char32_t>::~ctype()'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x20): undefined reference to `std::ctype<char32_t>::do_is(unsigned short, char32_t) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x28): undefined reference to `std::ctype<char32_t>::do_is(char32_t const*, char32_t const*, unsigned short*) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x30): undefined reference to `std::ctype<char32_t>::do_scan_is(unsigned short, char32_t const*, char32_t const*) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x38): undefined reference to `std::ctype<char32_t>::do_scan_not(unsigned short, char32_t const*, char32_t const*) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x40): undefined reference to `std::ctype<char32_t>::do_toupper(char32_t) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x48): undefined reference to `std::ctype<char32_t>::do_toupper(char32_t*, char32_t const*) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x50): undefined reference to `std::ctype<char32_t>::do_tolower(char32_t) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x58): undefined reference to `std::ctype<char32_t>::do_tolower(char32_t*, char32_t const*) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x60): undefined reference to `std::ctype<char32_t>::do_widen(char) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x68): undefined reference to `std::ctype<char32_t>::do_widen(char const*, char const*, char32_t*) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x70): undefined reference to `std::ctype<char32_t>::do_narrow(char32_t, char) const'
/usr/bin/ld: /home/ZV5zzb/ccuvaQdQ.o:(.data.rel.ro._ZTVZ4testIDiEvvE18Destructible_ctype[_ZTVZ4testIDiEvvE18Destructible_ctype]+0x78): undefined reference to `std::ctype<char32_t>::do_narrow(char32_t const*, char32_t const*, char, char*) const'
collect2: error: ld returned 1 exit status

Standard output is empty