tree 5e5b68000ddde6fe775e2379b18e7dfa0ad98e11
parent e22f9c1fdd00f2ad3cfdd1dd7a67145eadc3b21c
author Dennis Kormalev <denk@google.com> 1707323963 -0800
committer Copybara-Service <copybara-worker@google.com> 1707324046 -0800

Add absl_container_hash-based HashEq specialization

SwissTable provides support for heterogeneous lookup in associative
containers through transparent Hash and Eq types. However, it is not
possible for user types to provide additional specializations to allow
their types to use this functionality.

This CL brings ability for user types to specify their own transparent
absl_container_hash and (optionally) absl_container_eq inner types to
achieve the same functionality.

PiperOrigin-RevId: 604994859
Change-Id: I302486d292c9a18b7d4c77033227008f5539e354