[cfe-dev] auto and decltype availability

Richard Smith richard at metafoo.co.uk
Sat Jul 16 03:19:33 PDT 2011

On Sat, July 16, 2011 10:54, Jean-Daniel Dupas wrote:
> Le 16 juil. 2011 à 03:42, Craig Silverstein a écrit :
>> } What is the release version number(s) of the LLVM project that first
>> } included a clang frontend that linked in a version of libclang that
>> } was able to correctly (according to a reasonably recent draft of the
>> } C++0x standard) handle the 'auto' and 'decltype' keywords?
>> In my limited experience, llvm releases are pretty far apart.  You may
>> be better served by just saying the date that the completed functionality
>> was submitted to top-of-tree clang.
>> How I would do it (caveat: I'm no expert on clang nor llvm), would be
>> to look for commits that updated http://clang.llvm.org/cxx_status.html.
>> One way to do that would be here:
>> http://llvm.org/viewvc/llvm-project/cfe/trunk/www/cxx_status.html?view=l
>> og
> You suggestion make me think about an other file that let you know the
> exact revision that enabled a c++0x feature.
> clang/test/Lexer/has_feature_cxx0x.cpp
> This is the test files which test the __has_feature() macro for each
> c++0x feature.
> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Lexer/has_feature_cxx0
> x.cpp?view=log
> For instance, auto_type was enabled in commit  r126078

The 'auto' type specifier became available in version 2.9. Some
auto-related issues were fixed in r126166, and cxx_status.html was updated
in r128787 in preparation for the 2.9 release.

Full support for 'decltype' in the type of a function template required
tracking instantiation dependence, which we did not yet do in version 2.9.
However, 'decltype' in other contexts was working in 2.9 (and quite
possibly in several earlier releases).


More information about the cfe-dev mailing list