pub unsafe extern "C" fn g_regex_replace_eval(
    regex: *const GRegex,
    string: *const i8,
    string_len: isize,
    start_position: i32,
    match_options: u32,
    eval: Option<unsafe extern "C" fn(_: *const GMatchInfo, _: *mut GString, _: *mut c_void) -> i32>,
    user_data: *mut c_void,
    error: *mut *mut GError
) -> *mut i8