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30af50146f07d7afdb196abf235f44ec44ea6409 by Derek Mauro <dmauro@google.com>:

Update Abseil dependency versions

PiperOrigin-RevId: 374415690

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6a241e9ea8ee201789bb66aadf9e1ca9cc23c5dc by Derek Mauro <dmauro@google.com>:

Fix the install test project, which is doing a mixed-mode build.
This manifests in failure with GCC 11, which defaults to C++17

Also explicitly reference python3 in the test script.
python2 is being removed by some Linux distros.

PiperOrigin-RevId: 374278107

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42f85122407e799183880e0b2e2a71f6d35ee003 by Evan Brown <ezb@google.com>:

Use `capacity + Group::kWidth` control bytes instead of `capacity + Group::kWidth + 1`.

We don't use the extra byte - we only need the first `capacity` ones that are valid, the one sentinel byte and then `Group::kWidth - 1` cloned control bytes. For example, in `EmptyGroup()`, where capacity is 0, we use `Group::kWidth` control bytes.

We need to update set_ctrl() to only mirror `Group::kWidth - 1` bytes instead of `Group::kWidth` bytes.

Note: this doesn't actually save memory unless `alignof(value_type)` is one.

Also add/update related comments.

PiperOrigin-RevId: 374198589

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5dcd09b2221bf23add583541769b476dac54e112 by Evan Brown <ezb@google.com>:

Improve b-tree value_comp() support.

- Don't expose internal adapted comparator functionality.
- Support value_comp() for maps using function pointer comparators.
- For maps, make value_compare's constructor and the member comparator be protected - [reference](https://en.cppreference.com/w/cpp/container/map/value_compare).

PiperOrigin-RevId: 373832649

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d75819786ff5a06e1ed0c5c1e80b3b95ac49c83b by Evan Brown <ezb@google.com>:

Don't export adapted comparator functionality in key_comp().

PiperOrigin-RevId: 373651039
GitOrigin-RevId: 30af50146f07d7afdb196abf235f44ec44ea6409
Change-Id: I260480b0923cefeba81c543e2b7c34cacaa7d7c7