Iterate over table with functions

[jorge-jbs]

I am trying to iterate over a table with functions unsuccessfully. I am not very experienced in Rust so I do not understand the compiler error. Here is my code:

let mut lua = lua::Lua::new();
lua.execute::<()>("table = { a = function (x) return x end }");

let mut fns: Vec<lua::LuaFunction<_>> = Vec::new();
let mut table_lua = lua.get::<lua::LuaTable<_>, _>("table").expect("reading table");
let mut table_lua_iter = table_lua.iter::<lua::AnyLuaValue, lua::LuaFunction<_>>();
loop {
    match table_lua_iter.next() {
        Some(Some((lua::AnyLuaValue::LuaString(k), v))) => {
            fns.push(v);
        }
        None | Some(None) => break,
        _ => {},
    }
}

and the error message:

error: no method named `next` found for type `lua::LuaTableIterator<'_, lua::PushGuard<&mut lua::Lua<'_>>, lua::AnyLuaValue, lua::LuaFunction<_>>` in the current scope
  --> src/config.rs:94:34
   |
94 |             match table_lua_iter.next() {
   |                                  ^^^^
   |
   = note: the method `next` exists but the following trait bounds were not satisfied: `lua::LuaFunction<_> : lua::LuaRead<&'i mut &'j mut lua::LuaTableIterator<lua::PushGuard<&mut lua::Lua<'_>>, lua::AnyLuaValue, lua::LuaFunction<_>>>`

I thought LuaFunction implemented LuaRead but it is not working.