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That Apple uses C++ (you could also have mentioned LLVM) does not change their production and API being mostly C or Obj-C, and thus their proposals are usually for C. A previous examples was blocks, they created those for C and Obj-C, they can be used from C++ but are completely incompatible with C++11 lambdas as far as I know.

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You can now implicitly cast lambdas to blocks, although they're otherwise completely separate (and must be - C++'s approach wouldn't easily translate to C).

They can be cast the other way, too. No?

Casting to a C++11 lambda doesn't really make any sense; each lambda function is a unique anonymous type. There's also no need to do any casting to use an Obj-C block anywhere that you can use a C++11 lambda, since they obviously already implement the Callable concept.

Also webkit. Can't they just treat lambdas as types(class/struct) with operator() methods?

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