[libcxx-commits] [PATCH] D59344: Add contains method to map types

[Zoe Carver via Phabricator via libcxx-commits]

zoecarver created this revision.
zoecarver added reviewers: mclow.lists, howard.hinnant.
Herald added subscribers: libcxx-commits, jdoerfert, ldionne.

Implements P0458R2 <http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0458r2.html>, adding `contains` to `map`, `multimap`, `unordered_map`, `unordered_multimap`, `set`, `multiset`, `unordered_set`, and (finally) `unordered_multiset`.

My editor messed up the spacing when I originally made this patch so let me know if you find any weird white space.

This patch is the predecessor to P0920R2 which I can submit once this one has been reviewed.


Repository:
  rCXX libc++

https://reviews.llvm.org/D59344

Files:
  include/map
  include/set
  include/unordered_map
  include/unordered_set
  test/std/containers/contains.pass.cpp

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