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1

What are the most useful proposed features of C1X so far? And what support for them is there in current compilers?

+1  A: 

Personally, I have a lot of use for the _Align( ) specifier and alignof operator. The _Align functionality is already pretty well supported in a lot of compilers (__attribute__((aligned( ))) in GCC, for example), but having a standardized syntax for reasoning about alignment is a welcome addition.

Stephen Canon