[PATCH] D48348: [ADT] Add zip_longest iterators.

[Michael Kruse via Phabricator via llvm-commits]

Meinersbur added a comment.

Getting the size may require iterating the sequence in advance, which I tried to avoid in https://reviews.llvm.org/D48100. The current `zip_shortest` also does not require a value-initializable type and returns references to elements in the container, both of which would not be possible.


Repository:
  rL LLVM

https://reviews.llvm.org/D48348