InlinedVector: Small improvement to the max_size() calculation

In some cases we can do a bit better by using
std::min(std::numeric_limits<size_type>::max() / 2, allocator<T>::max_size())

They may help in some cases, particularly on 32-bit platforms.

PiperOrigin-RevId: 471846886
Change-Id: I5bd63de5dd8aec3de6530a33d8904dd6e9bd015e

1 files changed, 4 insertions, 3 deletions

diff --git a/absl/container/inlined_vector.h b/absl/container/inlined_vector.h
index 42121228..08a47709 100644
--- a/absl/container/inlined_vector.h
+++ b/absl/container/inlined_vector.h
@@ -275,9 +275,10 @@ class InlinedVector {
   size_type max_size() const noexcept {
     // One bit of the size storage is used to indicate whether the inlined
     // vector contains allocated memory. As a result, the maximum size that the
-    // inlined vector can express is half of the max for
-    // AllocatorTraits<A>::max_size();
-    return AllocatorTraits<A>::max_size(storage_.GetAllocator()) / 2;
+    // inlined vector can express is the minimum of the limit of how many
+    // objects we can allocate and std::numeric_limits<size_type>::max() / 2.
+    return (std::min)(AllocatorTraits<A>::max_size(storage_.GetAllocator()),
+                      (std::numeric_limits<size_type>::max)() / 2);
   }
 
   // `InlinedVector::capacity()`