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24 #ifndef SIENA_ATTRIBUTES_H_INCLUDED
25 #define SIENA_ATTRIBUTES_H_INCLUDED
258 return !(*
this == x);
273 std::string &
to_string(std::string & s)
const;
429 std::string err_descr;
442 virtual const char*
what()
const throw() {
443 return err_descr.c_str();
483 virtual bool next() = 0;
497 virtual Iterator *
first()
const = 0;
543 virtual bool next() = 0;
552 virtual Iterator *
first()
const = 0;
594 virtual bool next() = 0;
604 virtual Iterator *
first()
const = 0;