1 files changed, 13 insertions, 3 deletions
diff --git a/absl/base/internal/exception_safety_testing.h b/absl/base/internal/exception_safety_testing.h
index 32450465a3d1..bec3ab30460b 100644
--- a/absl/base/internal/exception_safety_testing.h
+++ b/absl/base/internal/exception_safety_testing.h
@@ -164,7 +164,7 @@ class ConstructorTracker {
 
 template <typename Factory, typename Operation, typename Invariant>
 absl::optional<testing::AssertionResult> TestSingleInvariantAtCountdownImpl(
-    const Factory& factory, const Operation& operation, int count,
+    const Factory& factory, Operation operation, int count,
     const Invariant& invariant) {
   auto t_ptr = factory();
   absl::optional<testing::AssertionResult> current_res;
@@ -277,10 +277,12 @@ enum class TypeSpec {
  */
 template <TypeSpec Spec = TypeSpec::kEverythingThrows>
 class ThrowingValue : private exceptions_internal::TrackedObject {
-  constexpr static bool IsSpecified(TypeSpec spec) {
+  static constexpr bool IsSpecified(TypeSpec spec) {
     return static_cast<bool>(Spec & spec);
   }
 
+  static constexpr int kBadValue = 938550620;
+
  public:
   ThrowingValue() : TrackedObject(ABSL_PRETTY_FUNCTION) {
     exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
@@ -318,6 +320,7 @@ class ThrowingValue : private exceptions_internal::TrackedObject {
 
   ThrowingValue& operator=(const ThrowingValue& other) noexcept(
       IsSpecified(TypeSpec::kNoThrowCopy)) {
+    dummy_ = kBadValue;
     if (!IsSpecified(TypeSpec::kNoThrowCopy)) {
       exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
     }
@@ -327,6 +330,7 @@ class ThrowingValue : private exceptions_internal::TrackedObject {
 
   ThrowingValue& operator=(ThrowingValue&& other) noexcept(
       IsSpecified(TypeSpec::kNoThrowMove)) {
+    dummy_ = kBadValue;
     if (!IsSpecified(TypeSpec::kNoThrowMove)) {
       exceptions_internal::MaybeThrow(ABSL_PRETTY_FUNCTION);
     }
@@ -630,7 +634,7 @@ enum class AllocSpec {
  */
 template <typename T, AllocSpec Spec = AllocSpec::kEverythingThrows>
 class ThrowingAllocator : private exceptions_internal::TrackedObject {
-  constexpr static bool IsSpecified(AllocSpec spec) {
+  static constexpr bool IsSpecified(AllocSpec spec) {
     return static_cast<bool>(Spec & spec);
   }
 
@@ -1030,6 +1034,12 @@ MakeExceptionSafetyTester() {
   return {};
 }
 
+// Always return false, intended to be used as a checker with
+// TestExceptionSafety() to check that no exception is thrown.
+inline bool nothrow_guarantee(const void*) {
+  return ::testing::AssertionFailure() << "Violating NoThrowGuarantee";
+}
+
 }  // namespace testing
 
 #endif  // ABSL_BASE_INTERNAL_EXCEPTION_SAFETY_TESTING_H_