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constructing an ios app in rust, part 2: passing primitive facts among rust and ios

welcome to part 2 of our "constructing an ios app in rust" association! In the event that you have not perused part 1already, kindly try this. Walking the code in this publish will expect you to have installation a rust toolchain for ios. Final time, we assembled a fundamental "hi, global!" library in rust and successfully related it into an ios application. This time, we are able to look into a greater amount of rust's ffi, or out of doors potential interface, layer. The rust ebook has a first rate phase on rust's ffi offices; be that as it can, it is totally about how to call c libraries from rust, even as we need to head the opposite heading and speak to rust from swift. Under no circumstances like part 1, i'm no longer going to walk you via growing a rust library and an ios task to run all the instance code on this post. The code is facilitated on github, so that you can examine it at your rest. Be aware: in element 1, we investigated a five-segment plan for this arrangement, and element 2 should be "passing data between rust and ios." it started to get extremely lengthy, but, so we've got element the data going into . There may be in extra of 5 sections at ultimate. Structuring an api for our rust layer

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programming interface configuration is tough in any language. We are tossing a specific wrench into things with this venture:

• we're composing a library in rust, yet need to uncover its open interface in a c header, so we are restricted to data types which are best with c. This implies, for example, no generics or enums that preserve facts. Short backings both of those itself, however not such it is best with rust.

• on the quick facet, it might appear that we are speaking with a c library. This can be relatively excruciating every now and then, as properly.

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