chromium/third_party/abseil-cpp/absl/base/nullability_test.cc

// Copyright 2023 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 "absl/base/nullability.h"

#include <cassert>
#include <memory>
#include <utility>

#include "gtest/gtest.h"
#include "absl/base/attributes.h"

namespace {
Nonnull;
NullabilityUnknown;
Nullable;

void funcWithNonnullArg(Nonnull<int*> /*arg*/) { … }
template <typename T>
void funcWithDeducedNonnullArg(Nonnull<T*> /*arg*/) { … }

TEST(NonnullTest, NonnullArgument) { … }

Nonnull<int*> funcWithNonnullReturn() { … }

TEST(NonnullTest, NonnullReturn) { … }

TEST(PassThroughTest, PassesThroughRawPointerToInt) { … }

TEST(PassThroughTest, PassesThroughRawPointerToVoid) { … }

TEST(PassThroughTest, PassesThroughUniquePointerToInt) { … }

TEST(PassThroughTest, PassesThroughSharedPointerToInt) { … }

TEST(PassThroughTest, PassesThroughSharedPointerToVoid) { … }

TEST(PassThroughTest, PassesThroughPointerToMemberObject) { … }

TEST(PassThroughTest, PassesThroughPointerToMemberFunction) { … }

}  // namespace

// Nullable ADL lookup test
namespace util {
// Helper for NullableAdlTest.  Returns true, denoting that argument-dependent
// lookup found this implementation of DidAdlWin.  Must be in namespace
// util itself, not a nested anonymous namespace.
template <typename T>
bool DidAdlWin(T*) { … }

// Because this type is defined in namespace util, an unqualified call to
// DidAdlWin with a pointer to MakeAdlWin will find the above implementation.
struct MakeAdlWin { … };
}  // namespace util

namespace {
// Returns false, denoting that ADL did not inspect namespace util.  If it
// had, the better match (T*) above would have won out over the (...) here.
bool DidAdlWin(...) { … }

TEST(NullableAdlTest, NullableAddsNothingToArgumentDependentLookup) { … }
}  // namespace