Nice work! One nitpick: local function declarations, like local function g(x) return g(x) end are actually the same as writing local g; g = func

Nice work! One nitpick: local function declarations, like local function g(x) return g(x) end are actually the same as writing local g; g = function (x) return g(x) end . Without that first local g; statement, local functions wouldn't be able to call themselves recursively.