Re: [cxx-abi-dev] Proposed ABI changes for new C++0x SFINAE rules

[Jason Merrill <jason@xxxxxxxxxx>]

On 06/30/2010 11:33 AM, David Vandevoorde wrote:
> - We propose additional encodings for literals that can now appear in signatures.  nullptr is "LDn0E"; i.e., "a zero of type std::nullptr_t".

Why specify the zero?  That's the natural internal representation, but 
nullptr_t need not have any actual value.  Speaking of which, the ABI 
should specify how it is passed/returned from a function.

> - The patch includes an encoding for parenthesized initializers (code "pi") in new-expressions (see the production for<initializer>).

Why is that necessary?  Presumably a braced-initializer-list will be 
encoded somehow, leaving parenthesized as the only alternative.

The rest of your overview sounds good; I'll look at the diffs soon.

Jason