namespace std {
template <class charT, class traits = char_traits<charT>>
class istreambuf_iterator<charT, traits>::proxy { charT keep_;
basic_streambuf<charT,traits>* sbuf_;
proxy(charT c, basic_streambuf<charT,traits>* sbuf)
: keep_(c), sbuf_(sbuf) { }
public:
charT operator*() { return keep_; }
};
}
Class istreambuf_iterator<charT,traits>::proxy is for exposition only. An implementation is permitted to provide equivalent functionality without providing a class with this name. Class istreambuf_iterator<charT, traits>::proxy provides a temporary placeholder as the return value of the post-increment operator (operator++). It keeps the character pointed to by the previous value of the iterator for some possible future access to get the character.
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