blob: bd21343700196f227dea9815de68e9ed45d5825e [file] [log] [blame]
//===- TypeTraitsTest.cpp -------------------------------------------------===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "llvm/ADT/FunctionExtras.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/PointerIntPair.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/type_traits.h"
#include "gtest/gtest.h"
namespace {
// Compile-time tests using static assert.
namespace triviality {
// Helper for compile time checking trivially copy constructible and trivially
// move constructible type traits.
template <typename T, bool IsTriviallyCopyConstructible,
bool IsTriviallyMoveConstructible>
void TrivialityTester() {
static_assert(llvm::is_trivially_copy_constructible<T>::value ==
"Mismatch in expected trivial copy construction!");
static_assert(llvm::is_trivially_move_constructible<T>::value ==
"Mismatch in expected trivial move construction!");
#if defined(_LIBCPP_VERSION) || defined(_MSC_VER)
// On compilers with support for the standard traits, make sure they agree.
static_assert(std::is_trivially_copy_constructible<T>::value ==
"Mismatch in expected trivial copy construction!");
static_assert(std::is_trivially_move_constructible<T>::value ==
"Mismatch in expected trivial move construction!");
template void TrivialityTester<int, true, true>();
template void TrivialityTester<void *, true, true>();
template void TrivialityTester<int &, true, true>();
template void TrivialityTester<int &&, false, true>();
struct X {};
struct Y {
Y(const Y &);
struct Z {
Z(const Z &);
Z(Z &&);
struct A {
A(const A &) = default;
A(A &&);
struct B {
B(const B &);
B(B &&) = default;
template void TrivialityTester<X, true, true>();
template void TrivialityTester<Y, false, false>();
template void TrivialityTester<Z, false, false>();
template void TrivialityTester<A, true, false>();
template void TrivialityTester<B, false, true>();
template void TrivialityTester<Z &, true, true>();
template void TrivialityTester<A &, true, true>();
template void TrivialityTester<B &, true, true>();
template void TrivialityTester<Z &&, false, true>();
template void TrivialityTester<A &&, false, true>();
template void TrivialityTester<B &&, false, true>();
TEST(Triviality, Tester) {
TrivialityTester<int, true, true>();
TrivialityTester<void *, true, true>();
TrivialityTester<int &, true, true>();
TrivialityTester<int &&, false, true>();
TrivialityTester<X, true, true>();
TrivialityTester<Y, false, false>();
TrivialityTester<Z, false, false>();
TrivialityTester<A, true, false>();
TrivialityTester<B, false, true>();
TrivialityTester<Z &, true, true>();
TrivialityTester<A &, true, true>();
TrivialityTester<B &, true, true>();
TrivialityTester<Z &&, false, true>();
TrivialityTester<A &&, false, true>();
TrivialityTester<B &&, false, true>();
// Test that the following ADT behave as expected wrt. trivially copyable trait
// NB: It is important that this trait behaves the same for (at least) these
// types for all supported compilers to prevent ABI issue when llvm is compiled
// with compiler A and an other project using llvm is compiled with compiler B.
TEST(Triviality, ADT) {
TrivialityTester<llvm::SmallVector<int>, false, false>();
TrivialityTester<llvm::SmallString<8>, false, false>();
TrivialityTester<std::function<int()>, false, false>();
#if !defined(__FreeBSD__)
TrivialityTester<std::pair<int, bool>, true, true>();
TrivialityTester<llvm::unique_function<int()>, false, false>();
TrivialityTester<llvm::StringRef, true, true>();
TrivialityTester<llvm::ArrayRef<int>, true, true>();
TrivialityTester<llvm::PointerIntPair<int *, 2>, true, true>();
TrivialityTester<llvm::Optional<int>, true, true>();
} // namespace triviality
} // end anonymous namespace