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-rw-r--r--absl/hash/BUILD.bazel2
-rw-r--r--absl/hash/hash.h29
2 files changed, 18 insertions, 13 deletions
diff --git a/absl/hash/BUILD.bazel b/absl/hash/BUILD.bazel
index e1e6eae8..8c2daf70 100644
--- a/absl/hash/BUILD.bazel
+++ b/absl/hash/BUILD.bazel
@@ -35,10 +35,10 @@ cc_library(
copts = ABSL_DEFAULT_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
deps = [
+ ":city",
"//absl/base:core_headers",
"//absl/base:endian",
"//absl/container:fixed_array",
- "//absl/hash:city",
"//absl/meta:type_traits",
"//absl/numeric:int128",
"//absl/strings",
diff --git a/absl/hash/hash.h b/absl/hash/hash.h
index 339b685f..297dc9cb 100644
--- a/absl/hash/hash.h
+++ b/absl/hash/hash.h
@@ -42,23 +42,28 @@
//
// Example:
//
-// // Suppose we have a class `Circle` for which we want to add hashing
+// // Suppose we have a class `Circle` for which we want to add hashing:
// class Circle {
-// public:
-// ...
-// private:
-// std::pair<int, int> center_;
-// int radius_;
-// };
-//
-// // To add hashing support to `Circle`, we simply need to add an ordinary
-// // function `AbslHashValue()`, and return the combined hash state of the
-// // existing hash state and the class state:
+// public:
+// ...
+// private:
+// std::pair<int, int> center_;
+// int radius_;
+// };
//
+// // To add hashing support to `Circle`, we simply need to add a free
+// // (non-member) function `AbslHashValue()`, and return the combined hash
+// // state of the existing hash state and the class state. You can add such a
+// // free function using a friend declaration within the body of the class:
+// class Circle {
+// public:
+// ...
// template <typename H>
// friend H AbslHashValue(H h, const Circle& c) {
// return H::combine(std::move(h), c.center_, c.radius_);
// }
+// ...
+// };
//
// For more information, see Adding Type Support to `absl::Hash` below.
//
@@ -239,7 +244,7 @@ using Hash = absl::hash_internal::Hash<T>;
// }
// private:
// virtual void HashValue(absl::HashState state) const = 0;
-// };
+// };
//
// class Impl : Interface {
// private: