// WBCS to MBCS
static std::string wideStringToAnsiString(const std::wstring& wstring, const std::locale& locale = std::locale{""});

// MBCS to WBCS
static std::wstring ansiStringToWideString(const std::string& string, const std::locale& locale = std::locale{""});

// UTF-8 -> UTF-16
static std::u16string u8StringToU16String(const std::string& u8String);

// UTF-8 -> UTF-32
static std::u32string u8StringToU32String(const std::string& u8String);

// UTF-16 -> UTF-8
static std::string u16StringToU8String(const std::u16string& u16String);

// UTF-16 -> UTF-32
static std::u32string u16StringToU32String(const std::u16string& u16String);

// UTF-32 -> UTF-8
static std::string u32StringToU8String(const std::u32string& u32String);

// UTF-32 -> UTF-16
static std::u16string u32StringToU16String(const std::u32string& u32String);

#include "StringConvert.hpp"
#include <iostream>

int main()
{
  std::cout << StringConvert::wideStringToAnsiString(L"히이이익!") << std::endl;
  return 0;
}