C++ - Coroutines (Advanced)

Overview

Estimated time: 70–90 minutes

Implement coroutine machinery: promise types, custom awaiters, and safe lifetime patterns. Integrate cancellation.

Learning Objectives

• Define custom awaiters and promise types.
• Manage coroutine lifetimes and cancellation safely.

Prerequisites

• C++ - Coroutines (co_await, co_yield)

Custom awaiter sketch

struct my_awaiter {
  bool await_ready() const noexcept;
  void await_suspend(std::coroutine_handle<>);
  int await_resume();
};

Common Pitfalls

• Dangling handles and frames; ensure destroy() is called or use RAII wrappers.