tree 425411ecfe1619b19e94e0f4e8de11de3eda4bde
parent e2345a893fbb902761a40e4ec4b30f26c84480ff
author David 'Digit' Turner <digit@google.com> 1648394006 +0200
committer Commit Bot <commit-bot@chromium.org> 1650038089 +0000

Add TaggedPointer<T,N> template.

A compact encoding for a (pointer, tag) pair, where |tag| is a
small unsigned integer that uses no more than N bits, and
|pointer| is guaranteed to be aligned on N bits as well.

This will be used by future CLs to optimize memory usage of some
critical GN data structures.

Bug: None
Change-Id: Ica9d720a4579cbc30b312c1f940e46dd9230a0c8
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/13622
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: David Turner <digit@google.com>