On 10/11/24 7:02 AM, Simon Martin wrote:
Hi Jason,

On 11 Oct 2024, at 0:35, Jason Merrill wrote:

On 10/7/24 3:35 PM, Simon Martin wrote:
On 7 Oct 2024, at 18:58, Jason Merrill wrote:
On 10/7/24 11:27 AM, Simon Martin wrote:

        /* Now give a warning for all base functions without overriders,
           as they are hidden.  */
        for (tree base_fndecl : base_fndecls)
+         {
+           if (!base_fndecl || overriden_base_fndecls.contains
(base_fndecl))
+             continue;
+           tree *hider = hidden_base_fndecls.get (base_fndecl);
+           if (hider)

How about looping over hidden_base_fndecls instead of base_fndecls?

Unfortunately it does not work because a given base method can be
hidden
by one overload and overriden by another, in which case we don’t
want
to warn (see for example AA:foo(int) in Woverloaded-virt7.C). So we
need
to take both collections into account.

Yes, you'd still need to check overridden_base_fndecls.contains, but
that doesn't seem any different iterating over hidden_base_fndecls
instead of base_fndecls.
Sure, and I guess iterating over hidden_base_fndecls is more coherent

with what the warning is about. Changed in the attached updated patch,
successfully tested on x86_64-pc-linux-gnu. OK?

OK, thanks.

Jason

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