Function mlua_sys::lua51::lauxlib::luaL_optlstring

source ยท 
pub unsafe extern "C-unwind" fn luaL_optlstring(
    L: *mut lua_State,
    narg: c_int,
    def: *const c_char,
    l: *mut usize,
) -> *const c_char
Available on crate features lua51 or luajit only.