[cfe-commits] [patch] Allow vector<id<protocol>> in objc++11

Jordan Rose jordan_rose at apple.com
Fri Dec 14 09:26:49 PST 2012

A better way to write the test cases is to only put the expectations in the #if (using @OFFSET), and use the same set of test cases for C++11 and C++98.

Other than that, seems like a good improvement. Thanks, Nico!


On Dec 13, 2012, at 19:26 , Nico Weber <thakis at chromium.org> wrote:

> Hi,
> C++11 allowed writing "vector<vector<int>>" without a space between ">" and ">".
> Objective-C++11 doesn't seem to allow "vector<id<protocol>>" though, and the diagnostic message clang emits for it even gets worse with -std=c++11 (PR14603).
> The attached patch allows vector<id<protocol>> (only in c++11 mode) by pulling the parsing code for >> into its own function and calling it from the objc protocol parsing code. In C++98-mode, this also improves the produced diagnostic. I'm aware this is a language change, but it's more permissive so it shouldn't break existing code, and the change feels consistent with c++11 to me.
> If you think the language change part is not desirable, I'd want to land the patch but make the new function not suppress the '>>' diagnostic when called from the protocol parser, for the improved diagnostic.
> Thanks,
> Nico
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