[PATCH] D40210: [libc++] Shrink variant's index type when possible

[Eric Fiselier via Phabricator via cfe-commits]

EricWF updated this revision to Diff 123492.
EricWF added a comment.

- Address inline comments.


https://reviews.llvm.org/D40210

Files:
  include/__config
  include/variant
  test/libcxx/utilities/variant/variant.variant/variant_size.pass.cpp

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