[cxx-abi-dev] std::type_info::hash_code/before

[David Vandevoorde]

> On Oct 4, 2016, at 5:54 PM, John McCall <rjmccall at apple.com> wrote:
[…]
> What we did for ARM64 seems like the right basic approach: the type_info object records whether it's unique or non-unique, and non-unique RTTI just falls back on string-based comparisons / hashes.  The type_info is unique if and only if it's for a fundamental type in the ABI library or a polymorphic class with a key function.

That sounds pretty good, but can it be done in a backward-compatible way?  I’m guessing not, but perhaps it’s “close enough”?

	Daveed


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