merge hasCLanguageLinkage and isExternC

[Richard Smith]

Hey, I think you attached the wrong patch :)

On Tue, Feb 12, 2013 at 5:27 PM, Rafael Espíndola <
rafael.espindola at gmail.com> wrote:

> This is a followup to my previous patch and it finally merges
> hasCLanguageLinkage and isExternC back (keeping the shorter name). To
> the best of my knowledge hasCLanguageLinkage (now isExternC)
> implements the C++ standard notions of "has C language linkage" when
> in c++ mode. In C mode it classifies anything with an external linkage
> as have C language linkage.
>
> Sorry for the long detour, getting this right was a lot harder than I
> was expecting.
>
> Cheers,
> Rafael
>
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