structs with const generics in them don't codegen proeprly

[LLFourn]

Describe the bug

structs with const generics in them don't parse or generate properly

Steps to reproduce

I change the default template simple.rs to:

#[flutter_rust_bridge::frb(sync)] // Synchronous mode for simplicity of the demo
pub fn greet(_name: String) -> Foo<32> {
    todo!()
}

#[flutter_rust_bridge::frb(init)]
pub fn init_app() {
    // Default utilities - feel free to customize
    flutter_rust_bridge::setup_default_user_utils();
}

#[derive(Clone, Copy, Debug)]
pub struct Foo<const N: usize> {
    data: [u8; N],
}

And then generate doesn't work

Logs

no entry found for key=MirStructIdent(NamespacedName { namespace: Namespace { joined_path: "crate::api::simple" }, name: "Foo" })
thread 'main' panicked at /home/llfourn/.cargo/registry/src/index.crates.io-6f17d22bba15001f/flutter_rust_bridge_codegen-2.7.1/src/library/codegen/ir/mir/ty/structure.rs:36:32:
no entry found for key=MirStructIdent(NamespacedName { namespace: Namespace { joined_path: "crate::api::simple" }, name: "Foo" })

Expected behavior

I would at the very worst expect it to ignore the type and output a warning.

Generated binding code

Stuff looks like this:


impl SseEncode for crate::api::simple::Foo {
    // Codec=Sse (Serialization based), see doc to use other codecs
    fn sse_encode(self, serializer: &mut flutter_rust_bridge::for_generated::SseSerializer) {}
}


^ it's missing the const generic

OS

No response

Version of flutter_rust_bridge_codegen

flutter_rust_bridge_codegen 2.7.1

Flutter info

Version of clang++

No response

Additional context

No response

[welcome]

Hi! Thanks for opening your first issue here! 😄

[fzyzcjy]

Yes, generics is not yet supported (due to its high complexity). One way to handle it is to use macros to create structs without generics.

[LLFourn]

Just as a note I wasn't specifically trying to use a const generics struct, it just happened to be in one library I added to rust_input. I tried doing:

/// flutter_rust_bridge:ignore

on that struct in the library but that didn't work.

[fzyzcjy]

I see. What about ignore all functions that use that struct as well - does it work?