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Allow wildcard argument names in extern function signature #154

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dtolnay opened this issue Apr 26, 2020 · 0 comments · Fixed by #159

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dtolnay commented Apr 26, 2020

Currently we reject this for no particular reason. Seems like an oversight.

#[cxx::bridge]
mod ffi {
    extern "C" {
        fn repro(_: &str);
    }
}

error[cxxbridge]: unsupported signature

    ┌── src/main.rs:4:18 ───
    │
  4 │         fn repro(_: &str);  // but `s: &str` works
    │                  ^^^^^^^ unsupported signature

dtolnay added the help wanted label

jgalenson mentioned this issue

Allow wildcard argument names. #159

Merged

dtolnay closed this as completed in #159

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