tsv_ios.cpp

#include <locale>
#include <string>
#include <sstream>
#include <iostream>
#include <vector>

struct tsv_ctype : std::ctype<char> {
  static const mask* make_table()
  {
    static std::vector<mask> lut(classic_table(), classic_table() + table_size);
    lut[' '] &= ~space;
    return &lut[0];
  }
  explicit tsv_ctype(std::size_t refs = 0)
    : ctype(make_table(), false, refs) {}
};

int main ()
{
  std::istringstream iss ("123\tHello world\t3.14");

  int a;
  std::string b;
  float c;
  iss.imbue(std::locale(iss.getloc(), new tsv_ctype));  
  iss >> std::skipws >> a >> b >> c;
    
  std::cout << a << ":" << b << ":" << c << std::endl;
  return 0;
}