normalise(const std::string & rhs) -> std::string
template <class T>
to_string(T value, int precision) -> auto
template <class Ch, class Tr>
trim_left(std::basic_string< Ch, Tr > & rhs, const std::locale & loc) -> void
no_special_symbols(std::string s) -> std::string
trim(std::basic_string< Ch, Tr > & rhs, const std::locale & loc) -> void
empty(const std::string & line) -> bool
trim_right(std::basic_string< Ch, Tr > & rhs, const std::locale & loc) -> void