Function c_str

extlibs/fmt/include/fmt/os.h:75–118

#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)

FMT_BEGIN_NAMESPACE

/**
  \rst
  A reference to a null-terminated string. It can be constructed from a C
  string or ``std::string``.

  You can use one of the following type aliases for common character types:

  +---------------+-----------------------------+
  | Type          | Definition                  |
  +===============+=============================+
  | cstring_view  | basic_cstring_view<char>    |
  +---------------+-----------------------------+
  | wcstring_view | basic_cstring_view<wchar_t> |
  +---------------+-----------------------------+

  This class is most useful as a parameter type to allow passing
  different types of strings to a function, for example::

    template <typename... Args>
    std::string format(cstring_view format_str, const Args & ... args);

    format("{}", 42);
    format(std::string("{}"), 42);
  \endrst
 */
template <typename Char> class basic_cstring_view {
 private:
  const Char* data_;

 public:
  /** Constructs a string reference object from a C string. */
  basic_cstring_view(const Char* s) : data_(s) {}

  /**
    \rst
    Constructs a string reference from an ``std::string`` object.
    \endrst
   */
  basic_cstring_view(const std::basic_string<Char>& s) : data_(s.c_str()) {}

  /** Returns the pointer to a C string. */
  const Char* c_str() const { return data_; }
};

using cstring_view = basic_cstring_view<char>;