Export of internal Abseil changes

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f34cd235a12ad0ee1fea3a1ee5a427272dc2b285 by Abseil Team <absl-team@google.com>:

Migrates uses of deprecated map types to recommended types.

PiperOrigin-RevId: 309945156

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e3410a47ad32c0775b6911610bc47b22938decad by Matthew Brown <matthewbr@google.com>:

Internal Change

PiperOrigin-RevId: 309856021

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a58cfa25e0bb59e7fa9647ac1aae65eaccff0086 by Greg Falcon <gfalcon@google.com>:

Internal change.

PiperOrigin-RevId: 309804612

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cdc5ec310035fbe25f496bda283fe655d94d7769 by Mark Barolak <mbar@google.com>:

Standardize the header comments for friend functions in cord.h

PiperOrigin-RevId: 309779073

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fe61602701be795e54477b0fdbf5ffc1df12a6b7 by Samuel Benzaquen <sbenza@google.com>:

Implement %f natively for any input.
It evaluates the input at runtime and allocates stack space accordingly.

This removes a potential fallback into snprintf, improves performance, and removes all memory allocations in this formatting path.

PiperOrigin-RevId: 309752501

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79e2a24f3f959e8b06ddf1d440bbabbd5f89b5b7 by Greg Falcon <gfalcon@google.com>:

Add a Cord::swap() method.  Many other Abseil types already provide this, but it was missing here.

We already provided a two-argument free function form of `swap()`, but that API is better suited for generic code.  The swap member function is a better API when the types are known.

PiperOrigin-RevId: 309751740

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85cdf60024f153fb4fcb7fe68ed2b14b9faf119d by Derek Mauro <dmauro@google.com>:

Cleanup uses of "linker initialized" SpinLocks

PiperOrigin-RevId: 309581867

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9e5443bfcec4b94056b13c75326576e987ab88fb by Matt Kulukundis <kfm@google.com>:

Clarify intended mixing properties of `absl::Hash`

PiperOrigin-RevId: 309520174

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a0630f0827b67f217aaeae68a448fe4c1101e17d by Greg Falcon <gfalcon@google.com>:

Comment out a test in Emscripten to sidestep `long double` issues.

PiperOrigin-RevId: 309482953
GitOrigin-RevId: f34cd235a12ad0ee1fea3a1ee5a427272dc2b285
Change-Id: Icce0c9d547117374d596b9d684e4054ddd118669

1 files changed, 14 insertions, 7 deletions

diff --git a/absl/strings/cord.h b/absl/strings/cord.h
index ae3d2e71..86ae76fd 100644
--- a/absl/strings/cord.h
+++ b/absl/strings/cord.h
@@ -162,7 +162,7 @@ class Cord {
     if (contents_.is_tree()) DestroyCordSlow();
   }
 
-  // Cord::MakeCordFromExternal(data, callable)
+  // MakeCordFromExternal()
   //
   // Creates a Cord that takes ownership of external string memory. The
   // contents of `data` are not copied to the Cord; instead, the external
@@ -246,10 +246,17 @@ class Cord {
   // (pos + new_size) >= size(), the result is the subrange [pos, size()).
   Cord Subcord(size_t pos, size_t new_size) const;
 
+  // Cord::swap()
+  //
+  // Swaps the contents of the Cord with `other`.
+  void swap(Cord& other) noexcept;
+
   // swap()
   //
-  // Swaps the data of Cord `x` with Cord `y`.
-  friend void swap(Cord& x, Cord& y) noexcept;
+  // Swaps the contents of two Cords.
+  friend void swap(Cord& x, Cord& y) noexcept {
+    x.swap(y);
+  }
 
   // Cord::size()
   //
@@ -1032,6 +1039,10 @@ inline Cord& Cord::operator=(const Cord& x) {
 
 inline Cord::Cord(Cord&& src) noexcept : contents_(std::move(src.contents_)) {}
 
+inline void Cord::swap(Cord& other) noexcept {
+  contents_.Swap(&other.contents_);
+}
+
 inline Cord& Cord::operator=(Cord&& x) noexcept {
   contents_ = std::move(x.contents_);
   return *this;
@@ -1308,10 +1319,6 @@ inline bool operator<=(absl::string_view x, const Cord& y) { return !(y < x); }
 inline bool operator>=(const Cord& x, absl::string_view y) { return !(x < y); }
 inline bool operator>=(absl::string_view x, const Cord& y) { return !(x < y); }
 
-// Overload of swap for Cord. The use of non-const references is
-// required. :(
-inline void swap(Cord& x, Cord& y) noexcept { y.contents_.Swap(&x.contents_); }
-
 // Some internals exposed to test code.
 namespace strings_internal {
 class CordTestAccess {