Complete Modern C++ - Propagating Exceptions Across Threads

The video tutorial explains how promises can be used to propagate exceptions between threads. It covers setting exceptions in promises using try-catch blocks and the creation of exception pointers for sharing exceptions across threads. The tutorial demonstrates exception propagation from the main thread to a task and vice versa, highlighting the automatic creation of exception pointers by the runtime. It concludes by emphasizing the utility of promises for data sharing between threads without manual synchronization.

What is the primary role of a promise in exception handling between threads?

• To enhance code readability

• To synchronize thread execution

• To propagate exceptions between threads

• To manage memory allocation

Why is an exception pointer necessary when setting exceptions in a promise?

• It allows exceptions to be shared across different threads

• It automatically resolves exceptions

• It simplifies the code structure

• It improves the performance of exception handling

What happens when you wait on a shared state with an exception in a promise?

• The 'get' method throws the exception

• The exception is ignored

• The program continues without interruption

• The exception is logged but not thrown

How can a task propagate an exception to the main thread?

• By simply throwing the exception in the task

• By manually creating an exception pointer

• By using a special exception handler

• By using a callback function

What is a key benefit of using promises for data sharing between threads?

• It reduces the memory usage

• It increases the speed of data processing

• It eliminates the need for manual thread synchronization

• It simplifies the code syntax