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Export of internal Abseil changes

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9beb68204986a015c9cb065b9fae4f9a8879a788 by Abseil Team <absl-team@google.com>:

Move Base64EscapeInternal and CalculateBase64EscapedLenInternal to an internal header.

PiperOrigin-RevId: 288917378

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90acfbe03b3f9f6de3ffa49c39343dfaa2c5d38c by Greg Falcon <gfalcon@google.com>:

Update macos CI script to support the ALTERNATE_OPTIONS environment variable.

PiperOrigin-RevId: 288913564

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f1572e870678cdcda6b48cb39780d1ad984e4c1b by Derek Mauro <dmauro@google.com>:

Makes absl::NullSafeStringView constexpr
Fixes https://github.com/abseil/abseil-cpp/issues/583

PiperOrigin-RevId: 288906940

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d28a8471e32c10caa64bfffe6d6d4d0a8d144013 by Abseil Team <absl-team@google.com>:

absl::GetFlag is lock free for small trivially copyable types.

PiperOrigin-RevId: 288768172

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2643b8ed1a1dc836b38ab9e46538a1af129ffd67 by Gennadiy Rozental <rogeeff@google.com>:

Eliminate call to callback from flag initialization.

We do not need to have this invocation inside FlagImpl::Init since SetCallback performs invocation anyways. Calling InitCallback from inside of Init complicates separation of value initialization from data guard initialization, which is about to happen.

PiperOrigin-RevId: 288732526

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22caa880b7a4cb6da34e16a2e064a473c99e880b by Abseil Team <absl-team@google.com>:

Fix the documentation on how to create a null string_view.

PiperOrigin-RevId: 288727968

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10727c5cadc561837141176f4c9b9717cec9233a by Greg Falcon <gfalcon@google.com>:

Change CI scripts for gcc to use the ALTERNATE_OPTIONS file as well.

PiperOrigin-RevId: 288718855

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5d1e2dd6c7fb12af8aa4337a0f61872f5f0c5992 by Greg Falcon <gfalcon@google.com>:

Add an option for using inline namespaces in Abseil.

PiperOrigin-RevId: 288614491
GitOrigin-RevId: 9beb68204986a015c9cb065b9fae4f9a8879a788
Change-Id: If9acd46301e3df8cb231b4c16f7ed651bf4fb3c3
This commit is contained in:
Abseil Team 2020-01-09 09:58:48 -08:00 • committed by Derek Mauro
parent 63ee2f8877
commit b3aaac8a37
19 changed files with 527 additions and 255 deletions
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25
absl/strings/string_view_test.cc
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@ -931,6 +931,31 @@ TEST(StringViewTest, NullSafeStringView) {
}
}
TEST(StringViewTest, ConstexprNullSafeStringView) {
{
constexpr absl::string_view s = absl::NullSafeStringView(nullptr);
EXPECT_EQ(nullptr, s.data());
EXPECT_EQ(0, s.size());
EXPECT_EQ(absl::string_view(), s);
}
#if !defined(_MSC_VER) || _MSC_VER >= 1910
// MSVC 2017+ is required for good constexpr string_view support.
// See the implementation of `absl::string_view::StrlenInternal()`.
{
static constexpr char kHi[] = "hi";
absl::string_view s = absl::NullSafeStringView(kHi);
EXPECT_EQ(kHi, s.data());
EXPECT_EQ(strlen(kHi), s.size());
EXPECT_EQ(absl::string_view("hi"), s);
}
{
constexpr absl::string_view s = absl::NullSafeStringView("hello");
EXPECT_EQ(s.size(), 5);
EXPECT_EQ("hello", s);
}
#endif
}
TEST(StringViewTest, ConstexprCompiles) {
constexpr absl::string_view sp;
#ifdef ABSL_HAVE_STRING_VIEW_FROM_NULLPTR