[cfe-dev] [PATCH] Re: Interest in a -Wusing-namespace-in-headers?

[Elliot Glaysher (Chromium)]

Adds a -Wheader-hygiene warning for warnings that should only trigger
in #included files.

The first -Wheader-hygiene check is to make sure a using directive
isn't placed in the global context in a header.

On Wed, Mar 16, 2011 at 6:15 PM, Douglas Gregor <dgregor at apple.com> wrote:
> You don't need to perform the getDiagnosticLevel() check yourself, because the diagnostic system will handle warning suppression itself.
>
> However, I do suggest performing the CurContext->getDeclKind() == Decl::TranslationUnit check before the isFromMainFile() check, since the former is cheaper.

Done.

-- Elliot Glaysher
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