get_in_rdbuf.h

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#pragma once
#include <iostream>
 
template<class char_t>
inline std::basic_streambuf<char_t>* __get_in_rdbuf() {return nullptr;}
 
template<>
inline std::basic_streambuf<char>* __get_in_rdbuf<char>() {
  static std::basic_streambuf<char>* rdbuf = std::cin.rdbuf();
  return rdbuf;
}
 
template<>
inline std::basic_streambuf<wchar_t>* __get_in_rdbuf<wchar_t>() {
  static std::basic_streambuf<wchar_t>* rdbuf = std::wcin.rdbuf();
  return rdbuf;
}