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From: Richard Stallman <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: which-function deficiency in C mode
Date: Sat, 24 Jun 2006 04:31:26 -0400
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    which-function (and thus which-function-mode) does not determine the
    "function name" correctly in the following common cases:

    typedef struct foo {
      int bar;

Since which-function-mode uses the results of imenu, I think the first
step is to see whether imenu parses that wrong.  Could you do that?

    typedef struct {
      int bar;
      char* baz;
    } foo_t;

That is surely hopeless.