[PATCH] D34237: Mark the operations of __wrap_iter as constexpr

[Marshall Clow via Phabricator via cfe-commits]

mclow.lists created this revision.

`__wrap_iter` is an internal libc++ class used to, well, wrap other iterators (such as pointers) when we need or want an object type.

Mark the operations on `__wrap_iter` as constexpr, so that they can be used in a constexpr context if the underlying iterator can be used in such a context.

I've had this kicking around my machine for a while, and it hasn't caused any problems.
It probably needs a few tests before committing, though.


https://reviews.llvm.org/D34237

Files:
  include/algorithm
  include/iterator

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