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// 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 <memory>
#include <type_traits>
#include <utility>
#include "gtest/gtest.h"
namespace {
void funcWithNonnullArg(int* absl_nonnull /*arg*/) {}
template <typename T>
void funcWithDeducedNonnullArg(T* absl_nonnull /*arg*/) {}
TEST(NonnullTest, NonnullArgument) {
int var = 0;
funcWithNonnullArg(&var);
funcWithDeducedNonnullArg(&var);
}
int* absl_nonnull funcWithNonnullReturn() {
static int var = 0;
return &var;
}
TEST(NonnullTest, NonnullReturn) {
auto var = funcWithNonnullReturn();
(void)var;
}
TEST(PassThroughTest, PassesThroughRawPointerToInt) {
EXPECT_TRUE((std::is_same<int* absl_nonnull, int*>::value));
EXPECT_TRUE((std::is_same<int* absl_nullable, int*>::value));
EXPECT_TRUE((std::is_same<int* absl_nullability_unknown, int*>::value));
}
TEST(PassThroughTest, PassesThroughRawPointerToVoid) {
EXPECT_TRUE((std::is_same<void* absl_nonnull, void*>::value));
EXPECT_TRUE((std::is_same<void* absl_nullable, void*>::value));
EXPECT_TRUE((std::is_same<void* absl_nullability_unknown, void*>::value));
}
TEST(PassThroughTest, PassesThroughUniquePointerToInt) {
using T = std::unique_ptr<int>;
EXPECT_TRUE((std::is_same<absl_nonnull T, T>::value));
EXPECT_TRUE((std::is_same<absl_nullable T, T>::value));
EXPECT_TRUE((std::is_same<absl_nullability_unknown T, T>::value));
}
TEST(PassThroughTest, PassesThroughSharedPointerToInt) {
using T = std::shared_ptr<int>;
EXPECT_TRUE((std::is_same<absl_nonnull T, T>::value));
EXPECT_TRUE((std::is_same<absl_nullable T, T>::value));
EXPECT_TRUE((std::is_same<absl_nullability_unknown T, T>::value));
}
TEST(PassThroughTest, PassesThroughSharedPointerToVoid) {
using T = std::shared_ptr<void>;
EXPECT_TRUE((std::is_same<absl_nonnull T, T>::value));
EXPECT_TRUE((std::is_same<absl_nullable T, T>::value));
EXPECT_TRUE((std::is_same<absl_nullability_unknown T, T>::value));
}
TEST(PassThroughTest, PassesThroughPointerToMemberObject) {
using T = decltype(&std::pair<int, int>::first);
EXPECT_TRUE((std::is_same<absl_nonnull T, T>::value));
EXPECT_TRUE((std::is_same<absl_nullable T, T>::value));
EXPECT_TRUE((std::is_same<absl_nullability_unknown T, T>::value));
}
TEST(PassThroughTest, PassesThroughPointerToMemberFunction) {
using T = decltype(&std::unique_ptr<int>::reset);
EXPECT_TRUE((std::is_same<absl_nonnull T, T>::value));
EXPECT_TRUE((std::is_same<absl_nullable T, T>::value));
EXPECT_TRUE((std::is_same<absl_nullability_unknown T, T>::value));
}
} // namespace
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