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Utility/checked-istream.h

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#ifndef NMWR_UTILITY_CHECKED_ISTREAM_H
#define NMWR_UTILITY_CHECKED_ISTREAM_H

// $LICENSE

#include <iostream>
#include "Utility/pre-post-conditions.h"

class checked_istream {
private:
  std::istream* in;
public:
  checked_istream(std::istream* in_ = 0) : in(in_) {}

  template<class T>
  friend checked_istream& operator>>(checked_istream& in, T & t)
  { 
    REQUIRE( (in.in != 0), "no istream!\n",1);
    *(in.in) >> t; 
    REQUIRE( (in.in->good()), "bad istream, reading " << t << " failed!\n",1);
    return in;
  }
};

#endif

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Copyright (c) Guntram Berti 1997-2002. See the GrAL Homepage for up-to-date information.

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