[cfe-dev] "Blocks" in Clang (aka closures)

[Eli Friedman]

On Tue, Dec 9, 2008 at 4:11 PM, jp bonn <jp at jpbonn.com> wrote:
> Chris Lattner wrote:
>> Hi All,
>>
>> Steve has started working on an implementation of a language feature
>> named 'Blocks'.  The back story on this was that it was prototyped in
>> an private Clang fork (because it is much easier to experiment with
>> clang than with GCC), then implemented in GCC (where it evolved a
>> lot), and now we're re-implementing it in Clang.  The language feature
>> is already supported by mainline llvm-gcc, but we don't have up-to-
>> date documentation for it.  When that documentation is updated, it
>> will definitely be checked into the main clang repo (in clang/docs).
>
> I noticed some commits for "blocks" support in Clang but the
> documentation hasn't been committed yet.  Are blocks supported in Clang?

If I recall correctly, the parsing and semantic analysis are basically
complete, and there's the -rewrite-blocks option to clang to transform
C code with blocks into equivalent code without them, but there isn't
any native CodeGen support yet.

-Eli