C++ coroutines: What happens if an exception occurs in my return_value?

by Raymond Chen

When I introduced a basic implementation of a promise type, I noted that the return_value method or return_void method is called when the coroutine performs a co_return. But what happens if the return_value or return_void method raises an exception?

C++ coroutines: The initial and final suspend, and improving our return_value method

by Raymond Chen

Last time, we had a basic implementation of a promise type but left with the question of what the initial_suspend and final_suspend are for...

C++ coroutines: Basic implementation of a promise type

by Raymond Chen

Last time, we diagrammed out how the pieces of a coroutine fit together. Today we’ll fill in the diagram with code.

Fortunately, most of the hard work has already been done for us by the result_holder class we already wrote. We just need to adapt it to the format required by the coroutine specification...

A Generic Data Stream with Coroutines in C++20

by Rainer Grimm

In my last post in this mini-series to coroutines from the practical perspective, I presented the workflow of "An Infinite Data Stream with Coroutines in C++20". In this post, I use the generic potential of the data stream...

C++ User Group Meetings in April 2021

by Jens Weller

The monthly list of upcoming C++ User Group meetings, still online due to the pandemic!

In April Meeting C++ online hosts two different events: on April 8th Andreas Fertig will speak about C++ insights and on April 20th Meeting C++ hosts an online C++ Tool fair.

Taming the power of C++ with AI

by Jens Weller

In January Bryce Adelstein Lelbach gave a talk about NDVIDIAS CUDASTL fork at my online C++ User Group. Shortly after this talk was published on YouTube I got contacted by a start up, seeking feedback on their ideas of accelerating C++ with help of GPUs and AI...

C++ coroutines: The mental model for coroutine promises

by Raymond Chen

My earlier series on getting started with awaitable objects looked at how you produce awaitable objects, but up until now we haven’t been looking at the other side: How can you be an object that can await other objects?

Creating a task completion source for a C++ coroutine: Failing to produce a result

by Raymond Chen

So far, we’ve been working on building a result_holder that can hold any type of result. But what about errors?

Because maybe you have code that’s waiting for a result, and the code that’s supposed to produce the result realizes that it messed up and wants to say, “Sorry, no result today.”...

Creating a task completion source for a C++ coroutine: Producing nothing

by Raymond Chen

Last time, we created a result_holder that can hold a reference, and we solved it by using a wrapper. But there’s another type that we can’t put in a result_holder, not even with the help of a wrapper. That type is void...

Creating a task completion source for a C++ coroutine: Producing a result with references

by Raymond Chen

Last time, we created a result_holder that can be awaited until it is assigned a result, and I noted that the code was broken.

One of the reasons that it’s broken is that it doesn’t handle references properly...