Class basic_string_view

include/jwt/string_view.hpp:52–368

  typename Traits = std::char_traits<CharT>
>
class basic_string_view
{
public: // Member Types
  using traits_type = std::char_traits<CharT>;
  using value_type = CharT;
  using pointer = const CharT*;
  using const_pointer = const CharT*;
  using reference = const CharT&;
  using const_reference = const CharT&;
  using iterator = const CharT*;
  using const_iterator = const CharT*;
  using reverse_iterator = std::reverse_iterator<iterator>;
  using const_reverse_iterator = std::reverse_iterator<const_iterator>;
  using size_type = size_t;
  using difference_type = std::ptrdiff_t;

  static constexpr size_type npos = size_type(-1);

public: // 'tors
  /// The default constructor;
  basic_string_view() = default;

  /// Construct from string literal
  basic_string_view(const CharT* str) noexcept
    : data_(str)
    , len_(str ? traits_type::length(str) : 0)
  {
  }

  /// Construct from CharT pointer and provided length
  basic_string_view(const CharT* p, size_type len) noexcept
    : data_(p)
    , len_(len)
  {
  }

  /// Construct from std::string
  template <typename Allocator>
  basic_string_view(
      const std::basic_string<CharT, Traits, Allocator>& str) noexcept
    : data_(str.data())
    , len_(str.length())
  {
  }

  /// Copy constructor
  basic_string_view(const basic_string_view&) = default;

  /// Assignment operator
  basic_string_view& operator=(const basic_string_view&) = default;

  /// Destructor
  ~basic_string_view()
  {
    data_ = nullptr;
    len_ = 0;
  }