Changes imported from Abseil "staging" branch:

  - 8bcd472c6f1a7c8a3a7aac07d7e5e3f90685fe5e Create an exception-safety testing framework for Abseil by Jon Cohen <cohenjon@google.com>
  - 17cc4bb19ba86e2bc45e9381bd07450c06134903 Fix typo. by Abseil Team <absl-team@google.com>

GitOrigin-RevId: 8bcd472c6f1a7c8a3a7aac07d7e5e3f90685fe5e
Change-Id: Ia1f4f12d25c375e0af34fea052a4a82dc964eeff

absl/base/BUILD.bazel

@@ -226,6 +226,37 @@ cc_library(
     ],
     ],
 )
 )
 
 
+cc_library(
+    name = "pretty_function",
+    hdrs = ["internal/pretty_function.h"],
+)
+
+cc_library(
+    name = "exception_safety_testing",
+    testonly = 1,
+    srcs = ["internal/exception_safety_testing.cc"],
+    hdrs = ["internal/exception_safety_testing.h"],
+    copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
+    deps = [
+        ":config",
+        ":pretty_function",
+        "//absl/meta:type_traits",
+        "//absl/strings",
+        "@com_google_googletest//:gtest",
+    ],
+)
+
+cc_test(
+    name = "exception_safety_testing_test",
+    srcs = ["exception_safety_testing_test.cc"],
+    copts = ABSL_TEST_COPTS + ABSL_EXCEPTIONS_FLAG,
+    deps = [
+        ":exception_safety_testing",
+        "//absl/memory",
+        "@com_google_googletest//:gtest_main",
+    ],
+)
+
 cc_test(
 cc_test(
     name = "invoke_test",
     name = "invoke_test",
     size = "small",
     size = "small",

absl/base/attributes.h

@@ -260,7 +260,7 @@
 // ABSL_ATTRIBUTE_NO_SANITIZE_UNDEFINED
 // ABSL_ATTRIBUTE_NO_SANITIZE_UNDEFINED
 //
 //
 // Tells the UndefinedSanitizer to ignore a given function. Useful for cases
 // Tells the UndefinedSanitizer to ignore a given function. Useful for cases
-// where certain behavior (eg. devision by zero) is being used intentionally.
+// where certain behavior (eg. division by zero) is being used intentionally.
 // NOTE: GCC supports UndefinedBehaviorSanitizer(ubsan) since 4.9.
 // NOTE: GCC supports UndefinedBehaviorSanitizer(ubsan) since 4.9.
 // https://gcc.gnu.org/gcc-4.9/changes.html
 // https://gcc.gnu.org/gcc-4.9/changes.html
 #if defined(__GNUC__) && \
 #if defined(__GNUC__) && \

absl/base/internal/exception_safety_testing.cc

+#include "absl/base/internal/exception_safety_testing.h"
+
+#include "gtest/gtest.h"
+#include "absl/meta/type_traits.h"
+
+namespace absl {
+namespace exceptions_internal {
+
+int countdown = -1;
+
+void MaybeThrow(absl::string_view msg) {
+  if (countdown-- == 0) throw TestException(msg);
+}
+
+testing::AssertionResult FailureMessage(const TestException& e,
+                                        int countdown) noexcept {
+  return testing::AssertionFailure()
+         << "Exception number " << countdown + 1 << " thrown from " << e.what();
+}
+}  // namespace exceptions_internal
+}  // namespace absl

absl/base/internal/pretty_function.h

+#ifndef ABSL_BASE_INTERNAL_PRETTY_FUNCTION_H_
+#define ABSL_BASE_INTERNAL_PRETTY_FUNCTION_H_
+
+// ABSL_PRETTY_FUNCTION
+//
+// In C++11, __func__ gives the undecorated name of the current function.  That
+// is, "main", not "int main()".  Various compilers give extra macros to get the
+// decorated function name, including return type and arguments, to
+// differentiate between overload sets.  ABSL_PRETTY_FUNCTION is a portable
+// version of these macros which forwards to the correct macro on each compiler.
+#if defined(_MSC_VER)
+#define ABSL_PRETTY_FUNCTION __FUNCSIG__
+#elif defined(__GNUC__)
+#define ABSL_PRETTY_FUNCTION __PRETTY_FUNCTION__
+#else
+#error "Unsupported compiler"
+#endif
+
+#endif  // ABSL_BASE_INTERNAL_PRETTY_FUNCTION_H_

absl/strings/ascii_ctype.h

-// 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
-//
-//      http://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.
-
-#ifndef ABSL_STRINGS_ASCII_CTYPE_H_
-#define ABSL_STRINGS_ASCII_CTYPE_H_
-
-#include "absl/strings/ascii.h"
-
-inline bool ascii_isalpha(unsigned char c) {
-  return absl::ascii_isalpha(c);
-}
-inline bool ascii_isalnum(unsigned char c) {
-  return absl::ascii_isalnum(c);
-}
-inline bool ascii_isspace(unsigned char c) {
-  return absl::ascii_isspace(c);
-}
-inline bool ascii_ispunct(unsigned char c) {
-  return absl::ascii_ispunct(c);
-}
-inline bool ascii_isblank(unsigned char c) {
-  return absl::ascii_isblank(c);
-}
-inline bool ascii_iscntrl(unsigned char c) {
-  return absl::ascii_iscntrl(c);
-}
-inline bool ascii_isxdigit(unsigned char c) {
-  return absl::ascii_isxdigit(c);
-}
-inline bool ascii_isdigit(unsigned char c) {
-  return absl::ascii_isdigit(c);
-}
-inline bool ascii_isprint(unsigned char c) {
-  return absl::ascii_isprint(c);
-}
-inline bool ascii_isgraph(unsigned char c) {
-  return absl::ascii_isgraph(c);
-}
-inline bool ascii_isupper(unsigned char c) {
-  return absl::ascii_isupper(c);
-}
-inline bool ascii_islower(unsigned char c) {
-  return absl::ascii_islower(c);
-}
-inline bool ascii_isascii(unsigned char c) {
-  return absl::ascii_isascii(c);
-}
-inline char ascii_tolower(unsigned char c) {
-  return absl::ascii_tolower(c);
-}
-inline char ascii_toupper(unsigned char c) {
-  return absl::ascii_toupper(c);
-}
-
-#endif  // ABSL_STRINGS_ASCII_CTYPE_H_