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internal Abseil changes. by Abseil Team GitOrigin-RevId: 9ee91d3e430fb33a4590486573792eb0fa146c2d Change-Id: Ia06e548bc106cc9d136f6c65714be6645317aced --- absl/container/internal/compressed_tuple_test.cc | 269 ++++++++++++++++++++++- 1 file changed, 257 insertions(+), 12 deletions(-) (limited to 'absl/container/internal/compressed_tuple_test.cc') diff --git a/absl/container/internal/compressed_tuple_test.cc b/absl/container/internal/compressed_tuple_test.cc index 2b5ed4a4..ec893b90 100644 --- a/absl/container/internal/compressed_tuple_test.cc +++ b/absl/container/internal/compressed_tuple_test.cc @@ -4,7 +4,7 @@ // 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 +// 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, @@ -14,18 +14,26 @@ #include "absl/container/internal/compressed_tuple.h" +#include #include #include "gmock/gmock.h" #include "gtest/gtest.h" +#include "absl/container/internal/test_instance_tracker.h" +#include "absl/memory/memory.h" +#include "absl/types/any.h" +#include "absl/types/optional.h" +#include "absl/utility/utility.h" -namespace absl { -inline namespace lts_2018_12_18 { -namespace container_internal { -namespace { +// These are declared at global scope purely so that error messages +// are smaller and easier to understand. +enum class CallType { kConstRef, kConstMove }; template -struct Empty {}; +struct Empty { + constexpr CallType value() const& { return CallType::kConstRef; } + constexpr CallType value() const&& { return CallType::kConstMove; } +}; template struct NotEmpty { @@ -38,6 +46,15 @@ struct TwoValues { U value2; }; + +namespace absl { +inline namespace lts_2019_08_08 { +namespace container_internal { +namespace { + +using absl::test_internal::CopyableMovableInstance; +using absl::test_internal::InstanceTracker; + TEST(CompressedTupleTest, Sizeof) { EXPECT_EQ(sizeof(int), sizeof(CompressedTuple)); EXPECT_EQ(sizeof(int), sizeof(CompressedTuple>)); @@ -53,6 +70,141 @@ TEST(CompressedTupleTest, Sizeof) { sizeof(CompressedTuple, NotEmpty, Empty<1>>)); } +TEST(CompressedTupleTest, OneMoveOnRValueConstructionTemp) { + InstanceTracker tracker; + CompressedTuple x1(CopyableMovableInstance(1)); + EXPECT_EQ(tracker.instances(), 1); + EXPECT_EQ(tracker.copies(), 0); + EXPECT_LE(tracker.moves(), 1); + EXPECT_EQ(x1.get<0>().value(), 1); +} + +TEST(CompressedTupleTest, OneMoveOnRValueConstructionMove) { + InstanceTracker tracker; + + CopyableMovableInstance i1(1); + CompressedTuple x1(std::move(i1)); + EXPECT_EQ(tracker.instances(), 2); + EXPECT_EQ(tracker.copies(), 0); + EXPECT_LE(tracker.moves(), 1); + EXPECT_EQ(x1.get<0>().value(), 1); +} + +TEST(CompressedTupleTest, OneMoveOnRValueConstructionMixedTypes) { + InstanceTracker tracker; + CopyableMovableInstance i1(1); + CopyableMovableInstance i2(2); + Empty<0> empty; + CompressedTuple> + x1(std::move(i1), i2, empty); + EXPECT_EQ(x1.get<0>().value(), 1); + EXPECT_EQ(x1.get<1>().value(), 2); + EXPECT_EQ(tracker.copies(), 0); + EXPECT_EQ(tracker.moves(), 1); +} + +struct IncompleteType; +CompressedTuple> +MakeWithIncomplete(CopyableMovableInstance i1, + IncompleteType& t, // NOLINT + Empty<0> empty) { + return CompressedTuple>{ + std::move(i1), t, empty}; +} + +struct IncompleteType {}; +TEST(CompressedTupleTest, OneMoveOnRValueConstructionWithIncompleteType) { + InstanceTracker tracker; + CopyableMovableInstance i1(1); + Empty<0> empty; + struct DerivedType : IncompleteType {int value = 0;}; + DerivedType fd; + fd.value = 7; + + CompressedTuple> x1 = + MakeWithIncomplete(std::move(i1), fd, empty); + + EXPECT_EQ(x1.get<0>().value(), 1); + EXPECT_EQ(static_cast(x1.get<1>()).value, 7); + + EXPECT_EQ(tracker.copies(), 0); + EXPECT_EQ(tracker.moves(), 2); +} + +TEST(CompressedTupleTest, + OneMoveOnRValueConstructionMixedTypes_BraceInitPoisonPillExpected) { + InstanceTracker tracker; + CopyableMovableInstance i1(1); + CopyableMovableInstance i2(2); + CompressedTuple> + x1(std::move(i1), i2, {}); // NOLINT + EXPECT_EQ(x1.get<0>().value(), 1); + EXPECT_EQ(x1.get<1>().value(), 2); + EXPECT_EQ(tracker.instances(), 3); + // We are forced into the `const Ts&...` constructor (invoking copies) + // because we need it to deduce the type of `{}`. + // std::tuple also has this behavior. + // Note, this test is proof that this is expected behavior, but it is not + // _desired_ behavior. + EXPECT_EQ(tracker.copies(), 1); + EXPECT_EQ(tracker.moves(), 0); +} + +TEST(CompressedTupleTest, OneCopyOnLValueConstruction) { + InstanceTracker tracker; + CopyableMovableInstance i1(1); + + CompressedTuple x1(i1); + EXPECT_EQ(tracker.copies(), 1); + EXPECT_EQ(tracker.moves(), 0); + + tracker.ResetCopiesMovesSwaps(); + + CopyableMovableInstance i2(2); + const CopyableMovableInstance& i2_ref = i2; + CompressedTuple x2(i2_ref); + EXPECT_EQ(tracker.copies(), 1); + EXPECT_EQ(tracker.moves(), 0); +} + +TEST(CompressedTupleTest, OneMoveOnRValueAccess) { + InstanceTracker tracker; + CopyableMovableInstance i1(1); + CompressedTuple x(std::move(i1)); + tracker.ResetCopiesMovesSwaps(); + + CopyableMovableInstance i2 = std::move(x).get<0>(); + EXPECT_EQ(tracker.copies(), 0); + EXPECT_EQ(tracker.moves(), 1); +} + +TEST(CompressedTupleTest, OneCopyOnLValueAccess) { + InstanceTracker tracker; + + CompressedTuple x(CopyableMovableInstance(0)); + EXPECT_EQ(tracker.copies(), 0); + EXPECT_EQ(tracker.moves(), 1); + + CopyableMovableInstance t = x.get<0>(); + EXPECT_EQ(tracker.copies(), 1); + EXPECT_EQ(tracker.moves(), 1); +} + +TEST(CompressedTupleTest, ZeroCopyOnRefAccess) { + InstanceTracker tracker; + + CompressedTuple x(CopyableMovableInstance(0)); + EXPECT_EQ(tracker.copies(), 0); + EXPECT_EQ(tracker.moves(), 1); + + CopyableMovableInstance& t1 = x.get<0>(); + const CopyableMovableInstance& t2 = x.get<0>(); + EXPECT_EQ(tracker.copies(), 0); + EXPECT_EQ(tracker.moves(), 1); + EXPECT_EQ(t1.value(), 0); + EXPECT_EQ(t2.value(), 0); +} + TEST(CompressedTupleTest, Access) { struct S { std::string x; @@ -113,9 +265,14 @@ TEST(CompressedTupleTest, Nested) { EXPECT_EQ(4 * sizeof(char), sizeof(CompressedTuple, CompressedTuple>)); - EXPECT_TRUE( - (std::is_empty>, - CompressedTuple>>>::value)); + EXPECT_TRUE((std::is_empty, Empty<1>>>::value)); + + // Make sure everything still works when things are nested. + struct CT_Empty : CompressedTuple> {}; + CompressedTuple, CT_Empty> nested_empty; + auto contained = nested_empty.get<0>(); + auto nested = nested_empty.get<1>().get<0>(); + EXPECT_TRUE((std::is_same::value)); } TEST(CompressedTupleTest, Reference) { @@ -141,15 +298,103 @@ TEST(CompressedTupleTest, NoElements) { EXPECT_TRUE(std::is_empty>::value); } +TEST(CompressedTupleTest, MoveOnlyElements) { + CompressedTuple> str_tup( + absl::make_unique("str")); + + CompressedTuple>, + std::unique_ptr> + x(std::move(str_tup), absl::make_unique(5)); + + EXPECT_EQ(*x.get<0>().get<0>(), "str"); + EXPECT_EQ(*x.get<1>(), 5); + + std::unique_ptr x0 = std::move(x.get<0>()).get<0>(); + std::unique_ptr x1 = std::move(x).get<1>(); + + EXPECT_EQ(*x0, "str"); + EXPECT_EQ(*x1, 5); +} + +TEST(CompressedTupleTest, MoveConstructionMoveOnlyElements) { + CompressedTuple> base( + absl::make_unique("str")); + EXPECT_EQ(*base.get<0>(), "str"); + + CompressedTuple> copy(std::move(base)); + EXPECT_EQ(*copy.get<0>(), "str"); +} + +TEST(CompressedTupleTest, AnyElements) { + any a(std::string("str")); + CompressedTuple x(any(5), a); + EXPECT_EQ(absl::any_cast(x.get<0>()), 5); + EXPECT_EQ(absl::any_cast(x.get<1>()), "str"); + + a = 0.5f; + EXPECT_EQ(absl::any_cast(x.get<1>()), 0.5); + + // Ensure copy construction work in the face of a type with a universal + // implicit constructor; + CompressedTuple c{}, d(c); // NOLINT +} + TEST(CompressedTupleTest, Constexpr) { - constexpr CompressedTuple> x( - 7, 1.25, CompressedTuple(5)); + struct NonTrivialStruct { + constexpr NonTrivialStruct() = default; + constexpr int value() const { return v; } + int v = 5; + }; + struct TrivialStruct { + TrivialStruct() = default; + constexpr int value() const { return v; } + int v; + }; + constexpr CompressedTuple, Empty<0>> x( + 7, 1.25, CompressedTuple(5), {}); constexpr int x0 = x.get<0>(); constexpr double x1 = x.get<1>(); constexpr int x2 = x.get<2>().get<0>(); + constexpr CallType x3 = x.get<3>().value(); + EXPECT_EQ(x0, 7); EXPECT_EQ(x1, 1.25); EXPECT_EQ(x2, 5); + EXPECT_EQ(x3, CallType::kConstRef); + +#if !defined(__GNUC__) || defined(__clang__) || __GNUC__ > 4 + constexpr CompressedTuple, TrivialStruct, int> trivial = {}; + constexpr CallType trivial0 = trivial.get<0>().value(); + constexpr int trivial1 = trivial.get<1>().value(); + constexpr int trivial2 = trivial.get<2>(); + + EXPECT_EQ(trivial0, CallType::kConstRef); + EXPECT_EQ(trivial1, 0); + EXPECT_EQ(trivial2, 0); +#endif + + constexpr CompressedTuple, NonTrivialStruct, absl::optional> + non_trivial = {}; + constexpr CallType non_trivial0 = non_trivial.get<0>().value(); + constexpr int non_trivial1 = non_trivial.get<1>().value(); + constexpr absl::optional non_trivial2 = non_trivial.get<2>(); + + EXPECT_EQ(non_trivial0, CallType::kConstRef); + EXPECT_EQ(non_trivial1, 5); + EXPECT_EQ(non_trivial2, absl::nullopt); + + static constexpr char data[] = "DEF"; + constexpr CompressedTuple z(data); + constexpr const char* z1 = z.get<0>(); + EXPECT_EQ(std::string(z1), std::string(data)); + +#if defined(__clang__) + // An apparent bug in earlier versions of gcc claims these are ambiguous. + constexpr int x2m = absl::move(x.get<2>()).get<0>(); + constexpr CallType x3m = absl::move(x).get<3>().value(); + EXPECT_EQ(x2m, 5); + EXPECT_EQ(x3m, CallType::kConstMove); +#endif } #if defined(__clang__) || defined(__GNUC__) @@ -164,5 +409,5 @@ TEST(CompressedTupleTest, EmptyFinalClass) { } // namespace } // namespace container_internal -} // inline namespace lts_2018_12_18 +} // inline namespace lts_2019_08_08 } // namespace absl -- cgit v1.2.3