Class Map

crates/c-api/include/wasmtime/component/val.hh:446–475

\brief Class representing a component model map, a collection of key/value pairs.

/// \brief Class representing a component model map, a collection of key/value
/// pairs.
class Map {
  friend class Val;

  VAL_REPR(Map, wasmtime_component_valmap_t);

  static void transfer(Raw &&from, Raw &to) {
    to = from;
    from.size = 0;
    from.data = nullptr;
  }

  void copy(const Raw &other) { wasmtime_component_valmap_copy(&raw, &other); }

  void destroy() { wasmtime_component_valmap_delete(&raw); }

public:
  /// Creates a new map from the key/value pairs provided.
  Map(std::vector<std::pair<Val, Val>> entries);

  /// \brief Returns the number of entries in the map.
  size_t size() const { return raw.size; }

  /// \brief Returns an iterator to the beginning of the map entries.
  const MapEntry *begin() const { return MapEntry::from_capi(raw.data); }

  /// \brief Returns an iterator to the end of the map entries.
  const MapEntry *end() const {
    return MapEntry::from_capi(raw.data + raw.size);
  }
};

class ResourceHost;