giles
073588812a
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parse-atom-postfix's '.()' branch now disambiguates between let-open
and array-get based on whether the head is a module path (':con' or
':field' chain rooted in ':con'). Module paths still emit
(:let-open M EXPR); everything else emits (:array-get ARR I).
Eval handles :array-get by reading the cell's underlying list at
index. The '<-' assignment handler now also accepts :array-get lhs
and rewrites the cell with one position changed.
Idiomatic OCaml array code now works:
let a = Array.make 5 0 in
for i = 0 to 4 do a.(i) <- i * i done;
a.(3) + a.(4) = 25
let a = Array.init 4 (fun i -> i + 1) in
a.(0) + a.(1) + a.(2) + a.(3) = 10
List.(length [1;2;3]) = 3 (* unchanged: List is a module *)