[cfe-dev] Typeid and forward declaration - Clarification needed

[Karen Shaeffer]

On Tue, Oct 29, 2013 at 10:00:41PM +0000, Karen Shaeffer wrote:
> > 
> > The wording was added by DR206 in response to the ambiguity in the original
> > (C++98) spec. Since this was a DR, it retroactively applies to C++98 too,
> > so this code has (in some sense) always been ill-formed, with no diagnostic
> > required:
> > 
> > http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#206
> > 
> > I'm not sure what you're talking about when you mention ambiguity.
> 
> Hi Richard,
> I simply meant the standard is clear and concise as you point out. And this
> issue has nothing to do with the discretion of the implementation. It is an
> ill-formed program. Thank you very much for clarifying the details. Very helpful.
> 

I work with Ubuntu 13.10 these days and am quite pleased to learn clang-3.3 is supported
by Ubuntu Saucy universe repositories.

root at ip-212-12-37-96:/etc/apt# dpkg --get-selections | grep llvm
libllvm3.3:amd64				install
llvm-3.3					install
llvm-3.3-dev					install
llvm-3.3-doc					install
llvm-3.3-runtime				install
root at ip-212-12-37-96:/etc/apt# dpkg --get-selections | grep clang
clang-3.3					install
libclang-common-3.3-dev				install
libclang1-3.3					install

My understanding is clang-3.3 provides full support for c++11 standard. That is one of my
requirements. Next step is to do comparison testing on performance of compiled binaries.
That is a critically important metric I am looking at.

enjoy,
Karen
-- 
Karen Shaeffer                 Be aware: If you see an obstacle in your path,
Neuralscape Services           that obstacle is your path.        Zen proverb