Re: Frustrated in autocast failure

On Mar 5, 7:55 pm, adrian.hawry...@gmail.com wrote:


Here is some simpler code that demonstrates the problem:

  #include <iostream>
  #include <string>

  struct S
  {
    std::string z;
    operator std::string () const { return z; }
  // operator int *() const { return 0; }
  };

  int main()
  {
    S s;
    std::cout << s;
  }

The program fails to compile, unless the (int *) line is commented
back in. Perhaps someone more knowledgable than me can now comment
on what is going on.

It seems to me that S->(int *)->(void *) to match ostream::operator<<
(void *) is a trickier sequence than S->std::string to match
operator<<(ostream &, std::string const &) ! In fact the gcc
output shows that the latter function is not even in the candidates
list.

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