Rescript-compiler: [Belt] Small roadmap

[chenglou]

Asked a few people and summarized into this

• [ ] Polish usage of belt (at least the data structures part) as a standalone js library
• [ ] Make it compile to native
• [ ] Docs
• [ ] String module (that works on native)
• [ ] Whatever you can think of (folks want json pattern matcher. Not really Belt though)
• [x] Option module (like Js.Option, but more idiomatic Belt)

[jchavarri]

Make it compile to native

@chenglou @bobzhang Is the plan to use bsb-native to compile "Universal Belt"? I'm asking because if that's the case we could use the BSB_BACKEND flag, and it would be a great "eat your own food" opportunity, to evaluate the experience of writing cross-platform code with BuckleScript.

as a standalone js library

Will this package just include Belt? Or the stdlib too? In https://github.com/BuckleScript/bucklescript/pull/2171 I started some preliminary steps to publish the stdlib as a standalone package (change templates, guarantee that both bs-platform and this new package stay in sync) that I could maybe revive for this.

[chenglou]

Yeah it would. Only need to standardize on a single env var name.

Will this package just include Belt?
Let's keep it just for Set/Map and their variations for now.

[jaredly]

Ok I think in terms of native compilation, I'm just gonna copy the sources into my project & fiddle with them until they work

[chenglou]

Ping here if you need any help understanding the conditional compilation: https://bucklescript.github.io/docs/en/conditional-compilation.html

[chenglou]

Option done! Thanks @arnarthor!

[bobzhang]

@jaredly we will support it on native. The worst thing is that we just keep the interface file and provide an alternative implementation. But let's wait for a while to allow some stability

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