A great start. One weakness is that decorators are not composable in this sketch: you can't have `@memoize @auto_index proc foo`. I don't see an easy way to r

A great start. One weakness is that decorators are not composable in this sketch: you can't have `@memoize @auto_index proc foo`. I don't see an easy way to remedy this within the framework presented here. In my personal Tcl style I'd avoid creating a proc body as the result of substitution. Instead, factor out the implementation so that the definition of @memoize can be: proc @memoize {p pname pargs lambda} { if {$p ne "proc"} { error "bad synax: $p != 'proc'"} proc $pname $pargs [list memoize_impl $pargs $lambda] } While it's possible the author's is better for performance or some other consideration (I didn't benchmark), I find that the style shown on the wiki can lead to string quoting hell.