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Re: C++ PATCH: PR 24687

From: Mike Stump <mrs at apple dot com>
To: mark at codesourcery dot com
Cc: gcc-patches at gcc dot gnu dot org
Date: Mon, 14 Nov 2005 16:39:21 -0800
Subject: Re: C++ PATCH: PR 24687
References: <200511150017.jAF0HiNG016382@sethra.codesourcery.com>

On Nov 14, 2005, at 4:17 PM, Mark Mitchell wrote:

You're not allowed to create a template with extern "C" linkage

+  /* [temp]
+
+     A template ... explicit specialization ... shall not have C
+     linkage.  */
+  if (current_lang_name == lang_name_c)
+    {
+      error ("template specialization with C linkage");

+  /* [temp]
+
+     A template ... shall not have C linkage.  */
+  if (current_lang_name == lang_name_c)
+    {
+      error ("template with C linkage");

It might be an improvement to name the open extern "C" { line, if any, that the linkage came from, as people have a habit of

extern "C" {
#include <files.h>
}

in headerfiles, and tracking down which one is apparently hard for some users. In emacs, it is just M-backward-up-list (aka M-C-u) in the preprocessed file. This is kinda rare, but happens once every couple of years still. :-(

References:
- C++ PATCH: PR 24687
  - From: Mark Mitchell

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