Implementing Ranges for Custom Types

Implementing Iterators in Custom Types

How can I implement iterators for my custom types in C++?

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To implement iterators for custom types in C++, you need to define begin() and end() methods in your class.

These methods should return iterators that can traverse the elements of your collection. Here's an example using a class Party that contains a collection of Player objects managed by an std::vector.

#include <vector>
#include <string>
#include <iostream>

class Player {
public:
  Player(std::string Name) : mName(Name) {}
  std::string GetName() const { return mName; }
private:
  std::string mName;
};

class Party {
public:
  void AddMember(const std::string& NewMember) {
    PartyMembers.emplace_back(NewMember);
  }

  auto begin() {
    return PartyMembers.begin();
  }
  auto end() {
    return PartyMembers.end();
  }

private:
  std::vector<Player> PartyMembers;
};

int main() {
  Party MyParty;
  MyParty.AddMember("Legolas");
  MyParty.AddMember("Gimli");
  MyParty.AddMember("Frodo");

  for (const auto& Player : MyParty) {
    std::cout << Player.GetName() << '\n';
  }
}
Legolas
Gimli
Frodo
This Question is from the Lesson:

Implementing Ranges for Custom Types

Learn to implement iterators in custom types, and make them compatible with range-based techniques.

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This Question is from the Lesson:

Implementing Ranges for Custom Types

Learn to implement iterators in custom types, and make them compatible with range-based techniques.

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