On Sat, 28 Apr 2001, Pixel wrote:

> Is there any way to ask ocamlc for an "unused variable" warning?
>
> let f x =
>    let x' = <...> in
>    x
>
> would issue something like
>
> File "test.ml", line 2, characters 3-18:
> Unused variable x'

 It's "unused" and can be optimized out only when <...> is a pure
functional statement (not changing global state). There is no clean way to
figure this out, since we can use foreign functions, and "purity" is not
specified in a module signature. 'tis a very interesting suggestion:
specify pure functional and state-changing functions in signatures
(automaticaly or manualy), and use this info for a better optimizations.


-------------------
To unsubscribe, mail caml-list-request@inria.fr.  Archives: http://caml.inria.fr