Export of internal Abseil changes.

--
7a6ff16a85beb730c172d5d25cf1b5e1be885c56 by Laramie Leavitt <lar@google.com>:

Internal change.

PiperOrigin-RevId: 254454546

--
ff8f9bafaefc26d451f576ea4a06d150aed63f6f by Andy Soffer <asoffer@google.com>:

Internal changes

PiperOrigin-RevId: 254451562

--
deefc5b651b479ce36f0b4ef203e119c0c8936f2 by CJ Johnson <johnsoncj@google.com>:

Account for subtracting unsigned values from the size of InlinedVector

PiperOrigin-RevId: 254450625

--
3c677316a27bcadc17e41957c809ca472d5fef14 by Andy Soffer <asoffer@google.com>:

Add C++17's std::make_from_tuple to absl/utility/utility.h

PiperOrigin-RevId: 254411573

--
4ee3536a918830eeec402a28fc31a62c7c90b940 by CJ Johnson <johnsoncj@google.com>:

Adds benchmark for the rest of the InlinedVector public API

PiperOrigin-RevId: 254408378

--
e5a21a00700ee83498ff1efbf649169756463ee4 by CJ Johnson <johnsoncj@google.com>:

Updates the definition of InlinedVector::shrink_to_fit() to be exception safe and adds exception safety tests for it.

PiperOrigin-RevId: 254401387

--
2ea82e72b86d82d78b4e4712a63a55981b53c64b by Laramie Leavitt <lar@google.com>:

Use absl::InsecureBitGen in place of std::mt19937
in tests absl/random/...distribution_test.cc

PiperOrigin-RevId: 254289444

--
fa099e02c413a7ffda732415e8105cad26a90337 by Andy Soffer <asoffer@google.com>:

Internal changes

PiperOrigin-RevId: 254286334

--
ce34b7f36933b30cfa35b9c9a5697a792b5666e4 by Andy Soffer <asoffer@google.com>:

Internal changes

PiperOrigin-RevId: 254273059

--
6f9c473da7c2090c2e85a37c5f00622e8a912a89 by Jorg Brown <jorg@google.com>:

Change absl::container_internal::CompressedTuple to instantiate its
internal Storage class with the name of the type it's holding, rather
than the name of the Tuple.  This is not an externally-visible change,
other than less compiler memory is used and less debug information is
generated.

PiperOrigin-RevId: 254269285

--
8bd3c186bf2fc0c55d8a2dd6f28a5327502c9fba by Andy Soffer <asoffer@google.com>:

Adding short-hand IntervalClosed for IntervalClosedClosed and IntervalOpen for
IntervalOpenOpen.

PiperOrigin-RevId: 254252419

--
ea957f99b6a04fccd42aa05605605f3b44b1ecfd by Abseil Team <absl-team@google.com>:

Do not directly use __SIZEOF_INT128__.

In order to avoid linker errors when building with clang-cl (__fixunsdfti, __udivti3 and __fixunssfti are undefined), this CL uses ABSL_HAVE_INTRINSIC_INT128 which is not defined for clang-cl.

PiperOrigin-RevId: 254250739

--
89ab385cd26b34d64130bce856253aaba96d2345 by Andy Soffer <asoffer@google.com>:

Internal changes

PiperOrigin-RevId: 254242321

--
cffc793d93eca6d6bdf7de733847b6ab4a255ae9 by CJ Johnson <johnsoncj@google.com>:

Adds benchmark for InlinedVector::reserve(size_type)

PiperOrigin-RevId: 254199226

--
c90c7a9fa3c8f0c9d5114036979548b055ea2f2a by Gennadiy Rozental <rogeeff@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 254072387

--
c4c388beae016c9570ab54ffa1d52660e4a85b7b by Laramie Leavitt <lar@google.com>:

Internal cleanup.

PiperOrigin-RevId: 254062381

--
d3c992e221cc74e5372d0c8fa410170b6a43c062 by Tom Manshreck <shreck@google.com>:

Update distributions.h to Abseil standards

PiperOrigin-RevId: 254054946

--
d15ad0035c34ef11b14fadc5a4a2d3ec415f5518 by CJ Johnson <johnsoncj@google.com>:

Removes functions with only one caller from the implementation details of InlinedVector by manually inlining the definitions

PiperOrigin-RevId: 254005427

--
2f37e807efc3a8ef1f4b539bdd379917d4151520 by Andy Soffer <asoffer@google.com>:

Initial release of Abseil Random

PiperOrigin-RevId: 253999861

--
24ed1694b6430791d781ed533a8f8ccf6cac5856 by CJ Johnson <johnsoncj@google.com>:

Updates the definition of InlinedVector::assign(...)/InlinedVector::operator=(...) to new, exception-safe implementations with exception safety tests to boot

PiperOrigin-RevId: 253993691

--
5613d95f5a7e34a535cfaeadce801441e990843e by CJ Johnson <johnsoncj@google.com>:

Adds benchmarks for InlinedVector::shrink_to_fit()

PiperOrigin-RevId: 253989647

--
2a96ddfdac40bbb8cb6a7f1aeab90917067c6e63 by Abseil Team <absl-team@google.com>:

Initial release of Abseil Random

PiperOrigin-RevId: 253927497

--
bf1aff8fc9ffa921ad74643e9525ecf25b0d8dc1 by Andy Soffer <asoffer@google.com>:

Initial release of Abseil Random

PiperOrigin-RevId: 253920512

--
bfc03f4a3dcda3cf3a4b84bdb84cda24e3394f41 by Laramie Leavitt <lar@google.com>:

Internal change.

PiperOrigin-RevId: 253886486

--
05036cfcc078ca7c5f581a00dfb0daed568cbb69 by Eric Fiselier <ericwf@google.com>:

Don't include `winsock2.h` because it drags in `windows.h` and friends,
and they define awful macros like OPAQUE, ERROR, and more. This has the
potential to break abseil users.

Instead we only forward declare `timeval` and require Windows users
include `winsock2.h` themselves. This is both inconsistent and poor QoI, but so
including 'windows.h' is bad too.

PiperOrigin-RevId: 253852615
GitOrigin-RevId: 7a6ff16a85beb730c172d5d25cf1b5e1be885c56
Change-Id: Icd6aff87da26f29ec8915da856f051129987cef6

1 files changed, 179 insertions, 0 deletions

diff --git a/absl/random/generators_test.cc b/absl/random/generators_test.cc
new file mode 100644
index 0000000..41725f1
--- /dev/null
+++ b/absl/random/generators_test.cc
@@ -0,0 +1,179 @@
+// Copyright 2017 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <cstddef>
+#include <cstdint>
+#include <random>
+#include <vector>
+
+#include "gtest/gtest.h"
+#include "absl/random/distributions.h"
+#include "absl/random/random.h"
+
+namespace {
+
+template <typename URBG>
+void TestUniform(URBG* gen) {
+  // [a, b) default-semantics, inferred types.
+  absl::Uniform(*gen, 0, 100);     // int
+  absl::Uniform(*gen, 0, 1.0);     // Promoted to double
+  absl::Uniform(*gen, 0.0f, 1.0);  // Promoted to double
+  absl::Uniform(*gen, 0.0, 1.0);   // double
+  absl::Uniform(*gen, -1, 1L);     // Promoted to long
+
+  // Roll a die.
+  absl::Uniform(absl::IntervalClosedClosed, *gen, 1, 6);
+
+  // Get a fraction.
+  absl::Uniform(absl::IntervalOpenOpen, *gen, 0.0, 1.0);
+
+  // Assign a value to a random element.
+  std::vector<int> elems = {10, 20, 30, 40, 50};
+  elems[absl::Uniform(*gen, 0u, elems.size())] = 5;
+  elems[absl::Uniform<size_t>(*gen, 0, elems.size())] = 3;
+
+  // Choose some epsilon around zero.
+  absl::Uniform(absl::IntervalOpenOpen, *gen, -1.0, 1.0);
+
+  // (a, b) semantics, inferred types.
+  absl::Uniform(absl::IntervalOpenOpen, *gen, 0, 1.0);  // Promoted to double
+
+  // Explict overriding of types.
+  absl::Uniform<int>(*gen, 0, 100);
+  absl::Uniform<int8_t>(*gen, 0, 100);
+  absl::Uniform<int16_t>(*gen, 0, 100);
+  absl::Uniform<uint16_t>(*gen, 0, 100);
+  absl::Uniform<int32_t>(*gen, 0, 1 << 10);
+  absl::Uniform<uint32_t>(*gen, 0, 1 << 10);
+  absl::Uniform<int64_t>(*gen, 0, 1 << 10);
+  absl::Uniform<uint64_t>(*gen, 0, 1 << 10);
+
+  absl::Uniform<float>(*gen, 0.0, 1.0);
+  absl::Uniform<float>(*gen, 0, 1);
+  absl::Uniform<float>(*gen, -1, 1);
+  absl::Uniform<double>(*gen, 0.0, 1.0);
+
+  absl::Uniform<float>(*gen, -1.0, 0);
+  absl::Uniform<double>(*gen, -1.0, 0);
+
+  // Tagged
+  absl::Uniform<double>(absl::IntervalClosedClosed, *gen, 0, 1);
+  absl::Uniform<double>(absl::IntervalClosedOpen, *gen, 0, 1);
+  absl::Uniform<double>(absl::IntervalOpenOpen, *gen, 0, 1);
+  absl::Uniform<double>(absl::IntervalOpenClosed, *gen, 0, 1);
+  absl::Uniform<double>(absl::IntervalClosedClosed, *gen, 0, 1);
+  absl::Uniform<double>(absl::IntervalOpenOpen, *gen, 0, 1);
+
+  absl::Uniform<int>(absl::IntervalClosedClosed, *gen, 0, 100);
+  absl::Uniform<int>(absl::IntervalClosedOpen, *gen, 0, 100);
+  absl::Uniform<int>(absl::IntervalOpenOpen, *gen, 0, 100);
+  absl::Uniform<int>(absl::IntervalOpenClosed, *gen, 0, 100);
+  absl::Uniform<int>(absl::IntervalClosedClosed, *gen, 0, 100);
+  absl::Uniform<int>(absl::IntervalOpenOpen, *gen, 0, 100);
+
+  // With *generator as an R-value reference.
+  absl::Uniform<int>(URBG(), 0, 100);
+  absl::Uniform<double>(URBG(), 0.0, 1.0);
+}
+
+template <typename URBG>
+void TestExponential(URBG* gen) {
+  absl::Exponential<float>(*gen);
+  absl::Exponential<double>(*gen);
+  absl::Exponential<double>(URBG());
+}
+
+template <typename URBG>
+void TestPoisson(URBG* gen) {
+  // [rand.dist.pois] Indicates that the std::poisson_distribution
+  // is parameterized by IntType, however MSVC does not allow 8-bit
+  // types.
+  absl::Poisson<int>(*gen);
+  absl::Poisson<int16_t>(*gen);
+  absl::Poisson<uint16_t>(*gen);
+  absl::Poisson<int32_t>(*gen);
+  absl::Poisson<uint32_t>(*gen);
+  absl::Poisson<int64_t>(*gen);
+  absl::Poisson<uint64_t>(*gen);
+  absl::Poisson<uint64_t>(URBG());
+}
+
+template <typename URBG>
+void TestBernoulli(URBG* gen) {
+  absl::Bernoulli(*gen, 0.5);
+  absl::Bernoulli(*gen, 0.5);
+}
+
+template <typename URBG>
+void TestZipf(URBG* gen) {
+  absl::Zipf<int>(*gen, 100);
+  absl::Zipf<int8_t>(*gen, 100);
+  absl::Zipf<int16_t>(*gen, 100);
+  absl::Zipf<uint16_t>(*gen, 100);
+  absl::Zipf<int32_t>(*gen, 1 << 10);
+  absl::Zipf<uint32_t>(*gen, 1 << 10);
+  absl::Zipf<int64_t>(*gen, 1 << 10);
+  absl::Zipf<uint64_t>(*gen, 1 << 10);
+  absl::Zipf<uint64_t>(URBG(), 1 << 10);
+}
+
+template <typename URBG>
+void TestGaussian(URBG* gen) {
+  absl::Gaussian<float>(*gen, 1.0, 1.0);
+  absl::Gaussian<double>(*gen, 1.0, 1.0);
+  absl::Gaussian<double>(URBG(), 1.0, 1.0);
+}
+
+template <typename URBG>
+void TestLogNormal(URBG* gen) {
+  absl::LogUniform<int>(*gen, 0, 100);
+  absl::LogUniform<int8_t>(*gen, 0, 100);
+  absl::LogUniform<int16_t>(*gen, 0, 100);
+  absl::LogUniform<uint16_t>(*gen, 0, 100);
+  absl::LogUniform<int32_t>(*gen, 0, 1 << 10);
+  absl::LogUniform<uint32_t>(*gen, 0, 1 << 10);
+  absl::LogUniform<int64_t>(*gen, 0, 1 << 10);
+  absl::LogUniform<uint64_t>(*gen, 0, 1 << 10);
+  absl::LogUniform<uint64_t>(URBG(), 0, 1 << 10);
+}
+
+template <typename URBG>
+void CompatibilityTest() {
+  URBG gen;
+
+  TestUniform(&gen);
+  TestExponential(&gen);
+  TestPoisson(&gen);
+  TestBernoulli(&gen);
+  TestZipf(&gen);
+  TestGaussian(&gen);
+  TestLogNormal(&gen);
+}
+
+TEST(std_mt19937_64, Compatibility) {
+  // Validate with std::mt19937_64
+  CompatibilityTest<std::mt19937_64>();
+}
+
+TEST(BitGen, Compatibility) {
+  // Validate with absl::BitGen
+  CompatibilityTest<absl::BitGen>();
+}
+
+TEST(InsecureBitGen, Compatibility) {
+  // Validate with absl::InsecureBitGen
+  CompatibilityTest<absl::InsecureBitGen>();
+}
+
+}  // namespace