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//===- STLForwardCompatTest.cpp - Unit tests for STLForwardCompat ---------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/STLForwardCompat.h"
#include "MoveOnly.h"
#include "gtest/gtest.h"
namespace {
template <typename T>
class STLForwardCompatRemoveCVRefTest : public ::testing::Test {};
using STLForwardCompatRemoveCVRefTestTypes = ::testing::Types<
// clang-format off
std::pair<int, int>,
std::pair<int &, int>,
std::pair<const int, int>,
std::pair<volatile int, int>,
std::pair<const volatile int &, int>,
std::pair<int *, int *>,
std::pair<int *const, int *>,
std::pair<const int *, const int *>,
std::pair<int *&, int *>
// clang-format on
>;
TYPED_TEST_SUITE(STLForwardCompatRemoveCVRefTest,
STLForwardCompatRemoveCVRefTestTypes, );
TYPED_TEST(STLForwardCompatRemoveCVRefTest, RemoveCVRef) {
using From = typename TypeParam::first_type;
using To = typename TypeParam::second_type;
EXPECT_TRUE(
(std::is_same<typename llvm::remove_cvref<From>::type, To>::value));
}
TYPED_TEST(STLForwardCompatRemoveCVRefTest, RemoveCVRefT) {
using From = typename TypeParam::first_type;
EXPECT_TRUE((std::is_same<typename llvm::remove_cvref<From>::type,
llvm::remove_cvref_t<From>>::value));
}
TEST(TransformTest, TransformStd) {
std::optional<int> A;
std::optional<int> B = llvm::transformOptional(A, [&](int N) { return N + 1; });
EXPECT_FALSE(B.has_value());
A = 3;
std::optional<int> C = llvm::transformOptional(A, [&](int N) { return N + 1; });
EXPECT_TRUE(C.has_value());
EXPECT_EQ(4, *C);
}
TEST(TransformTest, MoveTransformStd) {
using llvm::MoveOnly;
std::optional<MoveOnly> A;
MoveOnly::ResetCounts();
std::optional<int> B = llvm::transformOptional(
std::move(A), [&](const MoveOnly &M) { return M.val + 2; });
EXPECT_FALSE(B.has_value());
EXPECT_EQ(0u, MoveOnly::MoveConstructions);
EXPECT_EQ(0u, MoveOnly::MoveAssignments);
EXPECT_EQ(0u, MoveOnly::Destructions);
A = MoveOnly(5);
MoveOnly::ResetCounts();
std::optional<int> C = llvm::transformOptional(
std::move(A), [&](const MoveOnly &M) { return M.val + 2; });
EXPECT_TRUE(C.has_value());
EXPECT_EQ(7, *C);
EXPECT_EQ(0u, MoveOnly::MoveConstructions);
EXPECT_EQ(0u, MoveOnly::MoveAssignments);
EXPECT_EQ(0u, MoveOnly::Destructions);
}
TEST(TransformTest, TransformLlvm) {
std::optional<int> A;
std::optional<int> B =
llvm::transformOptional(A, [&](int N) { return N + 1; });
EXPECT_FALSE(B.has_value());
A = 3;
std::optional<int> C =
llvm::transformOptional(A, [&](int N) { return N + 1; });
EXPECT_TRUE(C.has_value());
EXPECT_EQ(4, *C);
}
TEST(TransformTest, MoveTransformLlvm) {
using llvm::MoveOnly;
std::optional<MoveOnly> A;
MoveOnly::ResetCounts();
std::optional<int> B = llvm::transformOptional(
std::move(A), [&](const MoveOnly &M) { return M.val + 2; });
EXPECT_FALSE(B.has_value());
EXPECT_EQ(0u, MoveOnly::MoveConstructions);
EXPECT_EQ(0u, MoveOnly::MoveAssignments);
EXPECT_EQ(0u, MoveOnly::Destructions);
A = MoveOnly(5);
MoveOnly::ResetCounts();
std::optional<int> C = llvm::transformOptional(
std::move(A), [&](const MoveOnly &M) { return M.val + 2; });
EXPECT_TRUE(C.has_value());
EXPECT_EQ(7, *C);
EXPECT_EQ(0u, MoveOnly::MoveConstructions);
EXPECT_EQ(0u, MoveOnly::MoveAssignments);
EXPECT_EQ(0u, MoveOnly::Destructions);
}
TEST(TransformTest, ToUnderlying) {
enum E { A1 = 0, B1 = -1 };
static_assert(llvm::to_underlying(A1) == 0);
static_assert(llvm::to_underlying(B1) == -1);
enum E2 : unsigned char { A2 = 0, B2 };
static_assert(
std::is_same_v<unsigned char, decltype(llvm::to_underlying(A2))>);
static_assert(llvm::to_underlying(A2) == 0);
static_assert(llvm::to_underlying(B2) == 1);
enum class E3 { A3 = -1, B3 };
static_assert(std::is_same_v<int, decltype(llvm::to_underlying(E3::A3))>);
static_assert(llvm::to_underlying(E3::A3) == -1);
static_assert(llvm::to_underlying(E3::B3) == 0);
}
} // namespace
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