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!

Jordan


On Dec 13, 2012, at 19:26 , Nico Weber <[email protected]> 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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