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Re: Reporting unused local variables


From: Ludovic Courtès
Subject: Re: Reporting unused local variables
Date: Thu, 23 Jul 2009 23:21:25 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux)

¡Hola!

Andy Wingo <address@hidden> writes:

> OK, here's another idea. Why don't we keep this as a separate pass --
> enabled if you pass a compilation option. That way it can be more
> functional, and you can keep approximate source information.

By "pass", you mean a new "language" in the tower?  As in
`lookup-compilation-order'?

> At each node you have a set of identifiers that are bound but not
> referenced. If the node is a reference, you remove that identifier
> from the set. If it is a binding, you add the bindings, traverse
> subexpressions, then do a set difference between your bindings and the
> return value from subexpression traversal -- that's your unused
> bindings.

Yes, this is roughly what I initially did[*], so that sounds reasonable.

Thanks!

Ludo'.

[*] http://thread.gmane.org/gmane.lisp.guile.devel/8795




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