mirror of
https://github.com/salsa-rs/salsa.git
synced 2024-12-28 15:57:08 +00:00
49 lines
2.1 KiB
Markdown
49 lines
2.1 KiB
Markdown
# salsa
|
|
|
|
[](https://github.com/salsa-rs/salsa/actions?query=workflow%3ATest)
|
|
[](https://github.com/salsa-rs/salsa/actions?query=workflow%3ABook)
|
|
[](https://docs.rs/salsa)
|
|
[](https://crates.io/crates/salsa)
|
|
|
|
*A generic framework for on-demand, incrementalized computation.*
|
|
|
|
## Obligatory warning
|
|
|
|
Very much a WORK IN PROGRESS at this point. Ready for experimental use
|
|
but expect frequent breaking changes.
|
|
|
|
## Credits
|
|
|
|
This system is heavily inspired by [adapton](http://adapton.org/), [glimmer](https://github.com/glimmerjs/glimmer-vm), and rustc's query
|
|
system. So credit goes to Eduard-Mihai Burtescu, Matthew Hammer,
|
|
Yehuda Katz, and Michael Woerister.
|
|
|
|
## Key idea
|
|
|
|
The key idea of `salsa` is that you define your program as a set of
|
|
**queries**. Every query is used like function `K -> V` that maps from
|
|
some key of type `K` to a value of type `V`. Queries come in two basic
|
|
varieties:
|
|
|
|
- **Inputs**: the base inputs to your system. You can change these
|
|
whenever you like.
|
|
- **Functions**: pure functions (no side effects) that transform your
|
|
inputs into other values. The results of queries is memoized to
|
|
avoid recomputing them a lot. When you make changes to the inputs,
|
|
we'll figure out (fairly intelligently) when we can re-use these
|
|
memoized values and when we have to recompute them.
|
|
|
|
## Want to learn more?
|
|
|
|
To learn more about Salsa, try one of the following:
|
|
|
|
- read the [heavily commented `hello_world` example](https://github.com/salsa-rs/salsa/blob/master/examples/hello_world/main.rs);
|
|
- check out the [Salsa book](https://salsa-rs.github.io/salsa);
|
|
- watch one of our [videos](https://salsa-rs.github.io/salsa/videos.html).
|
|
|
|
## Getting in touch
|
|
|
|
The bulk of the discussion happens in the [issues](https://github.com/salsa-rs/salsa/issues)
|
|
and [pull requests](https://github.com/salsa-rs/salsa/pulls),
|
|
but we have a [zulip chat](https://salsa.zulipchat.com/) as well.
|
|
|