Method parse_context

include/fmt/base.h:846–848

  using iterator = const Char*;

  constexpr explicit parse_context(basic_string_view<Char> fmt,
                                   int next_arg_id = 0)
      : fmt_(fmt), next_arg_id_(next_arg_id) {}

  /// Returns an iterator to the beginning of the format string range being
  /// parsed.