Export of internal Abseil changes.

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fa894a667a3bebbe479539c8d5e829beebf36c27 by Abseil Team <absl-team@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 216855907

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59e0a42fa9045eb164573b82ce625248bd9999f3 by Jon Cohen <cohenjon@google.com>:

Some edits to the documentation for absl::Hash as I was reading through it.

Itemized changes:
  * implement -> implements for grammar
  * Fix an incomplete sentence
  * specify *any* type T as opposed to *a* type T ? this is just the language I tend to see for these sorts of concepts in math and makes it more clear that we?re talking about a set of all types T satisfying these constraints
  * add arguments to comine() and combine_contiguous() ? this was mostly because for hash_continuous there was a reference to `size` elements without any mention of what `size` was.

PiperOrigin-RevId: 216766923

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c2a744d0f70ec5a079c22502b7a7ca72805a29dc by Shaindel Schwartz <shaindel@google.com>:

Remove unneeded include.

PiperOrigin-RevId: 216703710

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ad22fc4e3d236f7bd354b61e0fa37ea524a7cf5e by Shaindel Schwartz <shaindel@google.com>:

Fix typos.

PiperOrigin-RevId: 216699071
GitOrigin-RevId: fa894a667a3bebbe479539c8d5e829beebf36c27
Change-Id: I35c8d8be66043aad9f17bbb867e69acb770bd1b0

1 files changed, 5 insertions, 5 deletions

diff --git a/absl/hash/hash.h b/absl/hash/hash.h
index c7ba4c2b..8cbb19e2 100644
--- a/absl/hash/hash.h
+++ b/absl/hash/hash.h
@@ -25,8 +25,8 @@
 //   * `AbslHashValue`, an extension point that allows you to extend types to
 //     support Abseil hashing without requiring you to define a hashing
 //     algorithm.
-//   * `HashState`, a type-erased class which implement the manipulation of the
-//     hash state (H) itself. containing member functions `combine()` and
+//   * `HashState`, a type-erased class which implements the manipulation of the
+//     hash state (H) itself, contains member functions `combine()` and
 //     `combine_contiguous()`, which you can use to contribute to an existing
 //     hash state when hashing your types.
 //
@@ -69,7 +69,7 @@ namespace absl {
 // `absl::Hash`
 // -----------------------------------------------------------------------------
 //
-// `absl::Hash<T>` is a convenient general-purpose hash functor for a type `T`
+// `absl::Hash<T>` is a convenient general-purpose hash functor for any type `T`
 // satisfying any of the following conditions (in order):
 //
 //  * T is an arithmetic or pointer type
@@ -142,7 +142,7 @@ namespace absl {
 //
 // The "hash state" concept contains two member functions for mixing hash state:
 //
-// * `H::combine()`
+// * `H::combine(state, values...)`
 //
 //   Combines an arbitrary number of values into a hash state, returning the
 //   updated state. Note that the existing hash state is move-only and must be
@@ -160,7 +160,7 @@ namespace absl {
 //     state = H::combine(std::move(state), value2);
 //     state = H::combine(std::move(state), value3);
 //
-// * `H::combine_contiguous()`
+// * `H::combine_contiguous(state, data, size)`
 //
 //    Combines a contiguous array of `size` elements into a hash state,
 //    returning the updated state. Note that the existing hash state is