continuation
libcommon
continuation | libcommon | |
---|---|---|
5 | 2 | |
26 | 18 | |
- | - | |
4.5 | 9.8 | |
2 months ago | 9 days ago | |
TypeScript | C++ | |
- | BSD 2-clause "Simplified" License |
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continuation
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A more natural API for JavaScript generators
JavaScript generators are unmined gold! We've done a lot of usage of JavaScript generators as delimited continuations; using them to implement the classic shift/reset operations in JavaScript. https://github.com/thefrontside/continuation
Built on those delimited continuations is structured concurrency for JavaScript (https://frontside.com/effection)
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Bun, JavaScript, and TCO
While working on effection (https://github.com/thefrontside/effection) we spent a bunch of time ensuring that our delimited continuations could handle deep recursive call stacks in Deno.
PR: https://github.com/thefrontside/continuation/pull/11
TCO would have definitely simplified this issue.
What’s worse is hitting maximum memory callstack exception is very tricky to catch and is not reliable across runtimes. So when a user hits it it can be tricky to track down.
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Internals of Async / Await in JavaScript
- https://github.com/thefrontside/continuation
- https://github.com/thefrontside/effection/tree/v3
- https://github.com/neurosnap/starfx
The last one intends to replace redux-saga using DCs.
Here’s a presentation I gave recently talking about DCs in typescript: https://youtu.be/uRbqLGj_6mI?si=XI0JNMKMoO2VHMvM
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Philosophy of Coroutines
These libraries rely on deliminited continuations:
https://github.com/thefrontside/continuation
Because of this tiny implementation we are able to express any async flow construct with less code than relying on something like async/await or callbacks.
libcommon
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Philosophy of Coroutines
If you like Lua coroutines and C++20 coroutines, I have written a piece of code that allows to combine both: https://github.com/CM4all/libcommon/blob/master/src/lua/CoAw...
It's used for example by our "myproxy" project: https://github.com/CM4all/myproxy/blob/master/src/Connection... (Ctrl-F Lua::CoAwaitable) - a Lua coroutine is launched from within a C++20 coroutine and the C++20 coroutine awaits the Lua coroutine. Everything integrated in a non-blocking I/O event loop.
- C++20 Coroutines and Io_uring
What are some alternatives?
assembly - assembly projects
starfx - A modern approach to side-effect and state management for web apps.
kal - A powerful, easy-to-use, and easy-to-read programming language for the future.
effection - Structured concurrency and effects for JavaScript
myproxy - MySQL proxy
Async Ruby - An awesome asynchronous event-driven reactor for Ruby.
redux-saga - An alternative side effect model for Redux apps
WebKit - Home of the WebKit project, the browser engine used by Safari, Mail, App Store and many other applications on macOS, iOS and Linux.