[llvm] r206727 - Protect the ArgList dtor

[Reid Kleckner]

On Mon, Apr 21, 2014 at 10:59 AM, David Blaikie <dblaikie at gmail.com> wrote:
>
> In 4.7 and above there's "-Wdelete-non-virtual-dtor" which is enabled
> by -Wall and warns at the delete which is more accurate.
>
> So long as we're dynamically allocating ArgLists, we'd either need to
> mark the concrete ArgLists as final (this correctly suppresses
> -Wdelete-non-virtual-dtor in GCC 4.7 and Clang)
>

+1 for using -Wdelete-non-virtual-dtor and marking the concrete classes
final.
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