Export of internal Abseil changes

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0e867881e4b9f388a13d6fa8ed715192460130ab by Abseil Team <absl-team@google.com>:

Minor wording change to header comment for Mutex::AwaitWithDeadline(). No functional changes.

PiperOrigin-RevId: 306729491

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fc64361fb831003fa5e6fbb84a9a89338fd2838c by Derek Mauro <dmauro@google.com>:

Uses C++20 compatible allocator traits in Abseil types

This merges both instances of CountingAllocator in the Abseil codebase.
Makes the presubmits test C++20 mode.

Fixes #651

PiperOrigin-RevId: 306728102

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d759e5681b9dd6b7339fc019ed58fb5fdececdc3 by Derek Mauro <dmauro@google.com>:

Makes btree's iterator comparisons C++20 compatible

See https://stackoverflow.com/questions/60386792/c20-comparison-warning-about-ambiguous-reversed-operator

PiperOrigin-RevId: 306702048

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e9da5f409bc5ddb1bad308f9d8c41213c67a1d1e by Derek Mauro <dmauro@google.com>:

Switch a few uses of at() that should have been data() in the implementation of InlinedVector.
Use ABSL_HARDENING_ASSERT in resize().

PiperOrigin-RevId: 306670992
GitOrigin-RevId: 0e867881e4b9f388a13d6fa8ed715192460130ab
Change-Id: If431f3e5d77097e9901654773552dcc01dface87

1 files changed, 10 insertions, 6 deletions

diff --git a/absl/container/inlined_vector.h b/absl/container/inlined_vector.h
index 5f6f6154bf64..36f388aef7e0 100644
--- a/absl/container/inlined_vector.h
+++ b/absl/container/inlined_vector.h
@@ -351,14 +351,14 @@ class InlinedVector {
   // Returns a `reference` to the first element of the inlined vector.
   reference front() {
     ABSL_HARDENING_ASSERT(!empty());
-    return at(0);
+    return data()[0];
   }
 
   // Overload of `InlinedVector::front()` that returns a `const_reference` to
   // the first element of the inlined vector.
   const_reference front() const {
     ABSL_HARDENING_ASSERT(!empty());
-    return at(0);
+    return data()[0];
   }
 
   // `InlinedVector::back()`
@@ -366,14 +366,14 @@ class InlinedVector {
   // Returns a `reference` to the last element of the inlined vector.
   reference back() {
     ABSL_HARDENING_ASSERT(!empty());
-    return at(size() - 1);
+    return data()[size() - 1];
   }
 
   // Overload of `InlinedVector::back()` that returns a `const_reference` to the
   // last element of the inlined vector.
   const_reference back() const {
     ABSL_HARDENING_ASSERT(!empty());
-    return at(size() - 1);
+    return data()[size() - 1];
   }
 
   // `InlinedVector::begin()`
@@ -524,7 +524,7 @@ class InlinedVector {
   void assign(InputIterator first, InputIterator last) {
     size_type i = 0;
     for (; i < size() && first != last; ++i, static_cast<void>(++first)) {
-      at(i) = *first;
+      data()[i] = *first;
     }
 
     erase(data() + i, data() + size());
@@ -537,7 +537,10 @@ class InlinedVector {
   //
   // NOTE: if `n` is smaller than `size()`, extra elements are destroyed. If `n`
   // is larger than `size()`, new elements are value-initialized.
-  void resize(size_type n) { storage_.Resize(DefaultValueAdapter(), n); }
+  void resize(size_type n) {
+    ABSL_HARDENING_ASSERT(n <= max_size());
+    storage_.Resize(DefaultValueAdapter(), n);
+  }
 
   // Overload of `InlinedVector::resize(...)` that resizes the inlined vector to
   // contain `n` elements.
@@ -545,6 +548,7 @@ class InlinedVector {
   // NOTE: if `n` is smaller than `size()`, extra elements are destroyed. If `n`
   // is larger than `size()`, new elements are copied-constructed from `v`.
   void resize(size_type n, const_reference v) {
+    ABSL_HARDENING_ASSERT(n <= max_size());
     storage_.Resize(CopyValueAdapter(v), n);
   }