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Export of internal Abseil changes.

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00d42e3d5433aaf29c2ed293520b2ba178ae8bdb by Greg Falcon <gfalcon@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 238061818

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867a7ca318fac2991ea9a4107dbae3cc9fbf974a by Abseil Team <absl-team@google.com>:

Added a IWYU export pragma when including a standard header for the purpose of aliasing its symbols.

PiperOrigin-RevId: 238022277

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17047745058f2f151cd986ea9f649512542d3876 by Matt Armstrong <marmstrong@google.com>:

Clarify the comment discouraging WrapUnique<T>(x) calls.

PiperOrigin-RevId: 237873803

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3dcb2e4968243d33ca0ce53280c445df50f4a7ec by Samuel Benzaquen <sbenza@google.com>:

Workaround clang bug https://bugs.llvm.org/show_bug.cgi?id=38289

PiperOrigin-RevId: 237873551

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f348d2dc7087a990cbdfb95aa51fd7ff478ae40e by Samuel Benzaquen <sbenza@google.com>:

Reduce minimum capacity to 1.
This reduces memory usage for small tables.
A flat_hash_set<int> of 1 element goes from 92 bytes to 24.
A flat_hash_set<string> of 1 element goes from 512 bytes to 56.

PiperOrigin-RevId: 237859811

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9c8125be5e4e5d22a7bb62bdec8c323338385c1b by Jon Cohen <cohenjon@google.com>:

Bump to CMake 3.5. This is the oldest modern cmake being included by default in most popular OS distributions according to https://repology.org/project/cmake/versions.  Specifically, Ubuntu LTS 16.04 uses cmake 3.5 (https://packages.ubuntu.com/xenial/cmake)

PiperOrigin-RevId: 237859345

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07638d672e0a4dced986a62750cfd8318ed36ffa by Derek Mauro <dmauro@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 237714597
GitOrigin-RevId: 00d42e3d5433aaf29c2ed293520b2ba178ae8bdb
Change-Id: I5faecc45add4a5a774d4f9baf06e5519091f2ccc
This commit is contained in:
Abseil Team 2019-03-12 11:39:15 -07:00 • committed by vslashg
parent 88a152ae74
commit 256be56344
37 changed files with 180 additions and 128 deletions
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15
absl/memory/memory.h
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@ -47,19 +47,14 @@ namespace absl {
// X* NewX(int, int);
// auto x = WrapUnique(NewX(1, 2)); // 'x' is std::unique_ptr<X>.
//
// The purpose of WrapUnique is to automatically deduce the pointer type. If you
// wish to make the type explicit, for readability reasons or because you prefer
// to use a base-class pointer rather than a derived one, just use
// Do not call WrapUnique with an explicit type, as in
// `WrapUnique<X>(NewX(1, 2))`. The purpose of WrapUnique is to automatically
// deduce the pointer type. If you wish to make the type explicit, just use
// `std::unique_ptr` directly.
//
// Example:
// X* Factory(int, int);
// auto x = std::unique_ptr<X>(Factory(1, 2));
// auto x = std::unique_ptr<X>(NewX(1, 2));
// - or -
// std::unique_ptr<X> x(Factory(1, 2));
//
// This has the added advantage of working whether Factory returns a raw
// pointer or a `std::unique_ptr`.
// std::unique_ptr<X> x(NewX(1, 2));
//
// While `absl::WrapUnique` is useful for capturing the output of a raw
// pointer factory, prefer 'absl::make_unique<T>(args...)' over