Function rustc_demangle 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn rustc_demangle(
    mangled: *const c_char,
    out: *mut c_char,
    out_size: usize,
) -> c_int

C-style interface for demangling. Demangles symbol given in mangled argument into out buffer

Unsafe as it handles buffers by raw pointers.

Returns 0 if mangled is not Rust symbol or if out buffer is too small Returns 1 otherwise