[all-commits] [llvm/llvm-project] 52d4c5: [libc++] Fix a hard error in `contiguous_iterator<...

Konstantin Varlamov via All-commits all-commits at lists.llvm.org
Thu Aug 4 10:59:14 PDT 2022

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 52d4c5016c4f8eca6abe84f658fc5f358bdfd2d0
  Author: Konstantin Varlamov <varconst at apple.com>
  Date:   2022-08-04 (Thu, 04 Aug 2022)

  Changed paths:
    M libcxx/include/__memory/pointer_traits.h
    M libcxx/test/std/iterators/iterator.requirements/iterator.concepts/iterator.concept.random.access/contiguous_iterator.compile.pass.cpp

  Log Message:
  [libc++] Fix a hard error in `contiguous_iterator<NoOperatorArrowIter>`.

Evaluating `contiguous_iterator` on an iterator that satisfies all the
constraints except the `to_address` constraint and doesn't have
`operator->` defined results in a hard error. This is because
instantiating `to_address` ends up instantiating templates
dependent on the given type which might lead to a hard error even
in a SFINAE context.

Differential Revision: https://reviews.llvm.org/D130835

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