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Re: [patch-rfc] N2179: Exception Propagation in C++

Hi,

I can make it an int, but this may cause an ambiguity in the
ABI description for 64-bit targets. Can I rely on the structure
padding rules in the ABI to ensure cross-compiler compatibility, or
do I need to pad this manually? And if I do, how do I best do this?

To be clear, an _Atomic_word, like in the attached which I quickly hacked, untested (if you can, please double check the reference counting for off-by-one errors, thanks in advance).

A union { size_t __dummy; _Atomic_word __refs; } should work, as long as sizeof(size_t) >= sizeof(_Atomic_word).

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