tree 1768894e934a01ff54bb3371e7798f4e337f60ec
parent e526b98a3f57cc7a3135e15b1b112f9c88ef500d
author Arthur O'Dwyer <arthur.j.odwyer@gmail.com> 1627524258 -0400
committer Copybara-Service <copybara-worker@google.com> 1637605564 -0800

[libc++] [P1614] Implement [cmp.alg]'s std::{strong,weak,partial}_order.

This does not include `std::compare_*_fallback`; those are coming later.

There's still an open question of how to implement std::strong_order
for `long double`, which has 80 value bits and 48 padding bits on x86-64,
and which is presumably *not* IEEE 754-compliant on PPC64 and so on.
So that part is left unimplemented.

Differential Revision: https://reviews.llvm.org/D110738

GitOrigin-RevId: d8380ad977e94498e170b06449c81f1fc27da7b5