Function tlua::ffi::lua_cpcall

pub unsafe extern "C" fn lua_cpcall(
    l: *mut lua_State,
    func: lua_CFunction,
    ud: *mut c_void
) -> c_int

Calls the C function func in protected mode. func starts with only one element in its stack, a light userdata containing ud. In case of errors, lua_cpcall returns the same error codes as lua_pcall, plus the error object on the top of the stack; otherwise, it returns zero, and does not change the stack. All values returned by func are discarded. [-0, +(0|1), -]