Is &Vec<T> supported?

[PrismaPhonic]

I can't seem to get &Vec<T> to work - I looked through the swift rust bridge book at the type support table but don't see that one listed. Is it supposed to be supported yet?

[chinedufn]

No.

A temporary solution if you can afford a clone:

use std::clone::Clone;

#[swift_bridge::bridge]
mod ffi {
    #[swift_bridge(return_with = Clone::clone)]
    fn get_vec() -> Vec<String>;
}

fn get_vec() -> &Vec<String> {
    unimplemented!()
}

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If you or a future person cannot use that workaround and need &Vec<T> support I would be happy to write up step by step hand-held instructions on how to add it. In the meantime that temporary workaround may help for non performance sensitive cases.

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I'll leave a high-level summary of how to support it in case you or some future person ever needs &Vec<T> and cannot use the temporary workaround. If anyone sees this comment and wants more fine-grained hand-held instructions just let me know and I'll write them up.

• look over the contributing docs https://github.com/chinedufn/swift-bridge/blob/master/book/src/contributing/adding-support-for-a-signature/README.md

• adding a RustVecRef<T: Vectorizable> and RustVecRefMut<T: Vectorizable> here https://github.com/chinedufn/swift-bridge/blob/53b118d17f2f1a2922e969de528b99a2ffbc7dde/crates/swift-bridge-build/src/generate_core/rust_vec.swift#L1-L41

• making RustVec<T: Vectorizable> inherit from RustVecRefMut which inherits from RustVecRef, similar to this https://github.com/chinedufn/swift-bridge/blob/53b118d17f2f1a2922e969de528b99a2ffbc7dde/book/src/bridge-module/opaque-types/README.md?plain=1#L56-L71 https://github.com/chinedufn/swift-bridge/blob/53b118d17f2f1a2922e969de528b99a2ffbc7dde/crates/swift-bridge-ir/src/codegen/codegen_tests/opaque_rust_type_codegen_tests.rs#L36-L60

• Add codegen tests for passing &Vec<T> as an arg and as a return value, similar to these two https://github.com/chinedufn/swift-bridge/blob/53b118d17f2f1a2922e969de528b99a2ffbc7dde/crates/swift-bridge-ir/src/codegen/codegen_tests/vec_codegen_tests.rs#L177-L284

• Add an integration test similar to the one for Vec<T> https://github.com/chinedufn/swift-bridge/blob/53b118d17f2f1a2922e969de528b99a2ffbc7dde/SwiftRustIntegrationTestRunner/SwiftRustIntegrationTestRunnerTests/VecTests.swift#L79-L88

• Get the tests passing by tweaking the codegen https://github.com/chinedufn/swift-bridge/blob/53b118d17f2f1a2922e969de528b99a2ffbc7dde/crates/swift-bridge-ir/src/bridged_type.rs#L48 https://github.com/chinedufn/swift-bridge/tree/53b118d17f2f1a2922e969de528b99a2ffbc7dde/crates/swift-bridge-ir/src/codegen

[PrismaPhonic]

Thank you for the thoughtful reply. I'm pretty busy at the moment so will work around it - but if I get time in the future and it's not done yet I'll try to tackle it