Edition 2024: Identifiers named gen should be renamed to raw r#gen

[liss-h]

Hi, I understand that edition 2024 is not stable yet, but I wanted to notify you in advance of its stabilization (which will be in the next stable rust release as far as I understood).

Currently, bindgen cannot generate correct bindings for edition 2024, because it does not take the new reserved gen keyword into consideration, i.e. it incorrectly does not generate a raw identifier (r#gen).

Versions

• rustc 1.86.0-nightly (in edition 2024 mode)
• bindgen 0.71.1 (library)

Example

C Function:

void f(int gen);

Generated:

unsafe extern "C" {
    pub fn f(gen: i32);
}

Expected:

unsafe extern "C" {
    pub fn f(r#gen: i32);
}

[loftyinclination]

Mangling identifiers is done in rust_mangle. This wouldn't result in the format that you've suggested (r#gen), instead it suffixes the identifier with an underscore (gen_), but that's the behaviour for all other keywords too.