cxx 1.0.194

Safe interop between Rust and C++
Documentation 
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#[cxx::bridge]
mod ffi {
    #[repr(align(3))]
    struct SharedA {
        b: [u8; 4],
    }

    // 1073741824 = 2^30
    #[repr(align(1073741824))]
    struct SharedB {
        b: [u8; 4],
    }

    #[repr(align(-2))]
    struct SharedC {
        b: [u8; 4],
    }
}

fn main() {}