185         const types_map::const_iterator iter = _types.find(words[0]);  in parse()
460             const std::string::size_type open_pos = in_line.find(  in evaluate()
466                 const std::string::size_type close_pos = in_line.find(  in evaluate()
548     PRE(_vectors.find(name) == _vectors.end());  in add_variable()
564     PRE(_variables.find(name) != _variables.end());  in remove_variable()
565     _variables.erase(_variables.find(name));  in remove_variable()
580     PRE(_variables.find(name) == _variables.end());  in add_vector()
595     PRE(_variables.find(name) == _variables.end());  in add_to_vector()
596     PRE(_vectors.find(name) != _vectors.end());  in add_to_vector()
612     return (_variables.find(name) != _variables.end() ||  in exists()
613             _vectors.find(name) != _vectors.end());  in exists()
627     const variables_map::const_iterator iter = _variables.find(name);  in get_variable()
644     const vectors_map::const_iterator iter = _vectors.find(name);  in get_vector()
700     const std::string::size_type paren_open = expression.find('(');  in evaluate()
704         const std::string::size_type paren_close = expression.find(  in evaluate()