1 //===----------------------------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef TEST_SUPPORT_DEBUG_MODE_HELPER_H
11 #define TEST_SUPPORT_DEBUG_MODE_HELPER_H
14 #error _LIBCPP_DEBUG must be defined before including this header
16 #ifndef _LIBCPP_DEBUG_USE_EXCEPTIONS
17 #error _LIBCPP_DEBUG_USE_EXCEPTIONS must be defined before including this header
21 #ifndef _LIBCPP_VERSION
22 #error This header may only be used for libc++ tests"
31 #include "test_macros.h"
32 #include "assert_checkpoint.h"
33 #include "test_allocator.h"
35 // These test make use of 'if constexpr'.
36 #if TEST_STD_VER <= 14
37 #error This header may only be used in C++17 and greater
39 #ifdef TEST_HAS_NO_EXCEPTIONS
40 #error These tests require exceptions
43 #ifndef __cpp_if_constexpr
44 #error These tests require if constexpr
47 /// Assert that the specified expression throws a libc++ debug exception.
48 #define CHECK_DEBUG_THROWS(...) assert((CheckDebugThrows( [&]() { __VA_ARGS__; } )))
51 inline bool CheckDebugThrows(Func&& func) {
54 } catch (std::__libcpp_debug_exception const&) {
60 namespace IteratorDebugChecks {
80 constexpr bool isSequential(ContainerType CT) {
81 return CT_Vector >= CT && CT_ForwardList <= CT;
84 constexpr bool isAssociative(ContainerType CT) {
85 return CT_Map >= CT && CT_MultiSet <= CT;
88 constexpr bool isUnordered(ContainerType CT) {
89 return CT_UnorderedMap >= CT && CT_UnorderedMultiSet <= CT;
92 constexpr bool isSet(ContainerType CT) {
95 || CT == CT_UnorderedSet
96 || CT == CT_UnorderedMultiSet;
99 constexpr bool isMap(ContainerType CT) {
102 || CT == CT_UnorderedMap
103 || CT == CT_UnorderedMultiMap;
106 constexpr bool isMulti(ContainerType CT) {
107 return CT == CT_MultiMap
109 || CT == CT_UnorderedMultiMap
110 || CT == CT_UnorderedMultiSet;
113 template <class Container, class ValueType = typename Container::value_type>
114 struct ContainerDebugHelper {
115 static_assert(std::is_constructible<ValueType, int>::value,
116 "must be constructible from int");
118 static ValueType makeValueType(int val = 0, int = 0) {
119 return ValueType(val);
123 template <class Container>
124 struct ContainerDebugHelper<Container, char> {
125 static char makeValueType(int = 0, int = 0) {
130 template <class Container, class Key, class Value>
131 struct ContainerDebugHelper<Container, std::pair<const Key, Value> > {
132 using ValueType = std::pair<const Key, Value>;
133 static_assert(std::is_constructible<Key, int>::value,
134 "must be constructible from int");
135 static_assert(std::is_constructible<Value, int>::value,
136 "must be constructible from int");
138 static ValueType makeValueType(int key = 0, int val = 0) {
139 return ValueType(key, val);
143 template <class Container, ContainerType CT,
144 class Helper = ContainerDebugHelper<Container> >
145 struct BasicContainerChecks {
146 using value_type = typename Container::value_type;
147 using iterator = typename Container::iterator;
148 using const_iterator = typename Container::const_iterator;
149 using allocator_type = typename Container::allocator_type;
150 using traits = std::iterator_traits<iterator>;
151 using category = typename traits::iterator_category;
153 static_assert(std::is_same<test_allocator<value_type>, allocator_type>::value,
154 "the container must use a test allocator");
156 static constexpr bool IsBiDir =
157 std::is_convertible<category, std::bidirectional_iterator_tag>::value;
161 run_iterator_tests();
162 run_container_tests();
163 run_allocator_aware_tests();
166 static void run_iterator_tests() {
168 TestNullIterators<iterator>();
169 TestNullIterators<const_iterator>();
170 if constexpr (IsBiDir) { DecrementBegin(); }
174 assert(false && "uncaught debug exception");
178 static void run_container_tests() {
180 CopyInvalidatesIterators();
181 MoveInvalidatesIterators();
182 if constexpr (CT != CT_ForwardList) {
187 assert(false && "uncaught debug exception");
191 static void run_allocator_aware_tests() {
193 SwapNonEqualAllocators();
194 if constexpr (CT != CT_ForwardList ) {
195 // FIXME: This should work for both forward_list and string
196 SwapInvalidatesIterators();
199 assert(false && "uncaught debug exception");
203 static Container makeContainer(int size, allocator_type A = allocator_type()) {
205 if constexpr (CT == CT_ForwardList) {
206 for (int i = 0; i < size; ++i)
207 C.insert_after(C.before_begin(), Helper::makeValueType(i));
209 for (int i = 0; i < size; ++i)
210 C.insert(C.end(), Helper::makeValueType(i));
211 assert(C.size() == static_cast<std::size_t>(size));
216 static value_type makeValueType(int value) {
217 return Helper::makeValueType(value);
222 template <class Iter>
223 static void TestNullIterators() {
224 CHECKPOINT("testing null iterator");
226 CHECK_DEBUG_THROWS( ++it );
227 CHECK_DEBUG_THROWS( it++ );
228 CHECK_DEBUG_THROWS( *it );
229 if constexpr (CT != CT_VectorBool) {
230 CHECK_DEBUG_THROWS( it.operator->() );
232 if constexpr (IsBiDir) {
233 CHECK_DEBUG_THROWS( --it );
234 CHECK_DEBUG_THROWS( it-- );
238 static void DecrementBegin() {
239 CHECKPOINT("testing decrement on begin");
240 Container C = makeContainer(1);
241 iterator i = C.end();
242 const_iterator ci = C.cend();
245 assert(i == C.begin());
246 CHECK_DEBUG_THROWS( --i );
247 CHECK_DEBUG_THROWS( i-- );
248 CHECK_DEBUG_THROWS( --ci );
249 CHECK_DEBUG_THROWS( ci-- );
252 static void IncrementEnd() {
253 CHECKPOINT("testing increment on end");
254 Container C = makeContainer(1);
255 iterator i = C.begin();
256 const_iterator ci = C.begin();
259 assert(i == C.end());
260 CHECK_DEBUG_THROWS( ++i );
261 CHECK_DEBUG_THROWS( i++ );
262 CHECK_DEBUG_THROWS( ++ci );
263 CHECK_DEBUG_THROWS( ci++ );
266 static void DerefEndIterator() {
267 CHECKPOINT("testing deref end iterator");
268 Container C = makeContainer(1);
269 iterator i = C.begin();
270 const_iterator ci = C.cbegin();
272 if constexpr (CT != CT_VectorBool) {
277 assert(i == C.end());
278 CHECK_DEBUG_THROWS( *i );
279 CHECK_DEBUG_THROWS( *ci );
280 if constexpr (CT != CT_VectorBool) {
281 CHECK_DEBUG_THROWS( i.operator->() );
282 CHECK_DEBUG_THROWS( ci.operator->() );
287 static void CopyInvalidatesIterators() {
288 CHECKPOINT("copy invalidates iterators");
289 Container C1 = makeContainer(3);
290 iterator i = C1.begin();
292 if constexpr (CT == CT_ForwardList) {
296 CHECK_DEBUG_THROWS( C2.erase_after(i) );
298 CHECK_DEBUG_THROWS( *i_next );
300 CHECK_DEBUG_THROWS( C2.erase(i) );
303 CHECK_DEBUG_THROWS( *i );
307 static void MoveInvalidatesIterators() {
308 CHECKPOINT("copy move invalidates iterators");
309 Container C1 = makeContainer(3);
310 iterator i = C1.begin();
311 Container C2 = std::move(C1);
313 if constexpr (CT == CT_ForwardList) {
314 CHECK_DEBUG_THROWS( C1.erase_after(i) );
317 CHECK_DEBUG_THROWS( C1.erase(i) );
319 CHECK_DEBUG_THROWS(*i);
323 static void EraseIter() {
324 CHECKPOINT("testing erase invalidation");
325 Container C1 = makeContainer(2);
326 iterator it1 = C1.begin();
327 iterator it1_next = it1;
330 CHECK_DEBUG_THROWS( C2.erase(it1) ); // wrong container
331 CHECK_DEBUG_THROWS( C2.erase(C2.end()) ); // erase with end
333 CHECK_DEBUG_THROWS( C1.erase(it1_next) ); // invalidated iterator
335 CHECK_DEBUG_THROWS( C1.erase(it1) ); // invalidated iterator
338 static void EraseIterIter() {
339 CHECKPOINT("testing erase iter iter invalidation");
340 Container C1 = makeContainer(2);
341 iterator it1 = C1.begin();
342 iterator it1_next = it1;
345 iterator it2 = C2.begin();
346 iterator it2_next = it2;
348 CHECK_DEBUG_THROWS( C2.erase(it1, it1_next) ); // begin from wrong container
349 CHECK_DEBUG_THROWS( C2.erase(it1, it2_next) ); // end from wrong container
350 CHECK_DEBUG_THROWS( C2.erase(it2, it1_next) ); // both from wrong container
351 C2.erase(it2, it2_next);
354 // Allocator aware tests
355 static void SwapInvalidatesIterators() {
356 CHECKPOINT("testing swap invalidates iterators");
357 Container C1 = makeContainer(3);
358 Container C2 = makeContainer(3);
359 iterator it1 = C1.begin();
360 iterator it2 = C2.begin();
362 CHECK_DEBUG_THROWS( C1.erase(it1) );
363 if (CT == CT_String) {
364 CHECK_DEBUG_THROWS(C1.erase(it2));
368 CHECK_DEBUG_THROWS( C1.erase(it1) );
371 static void SwapNonEqualAllocators() {
372 CHECKPOINT("testing swap with non-equal allocators");
373 Container C1 = makeContainer(3, allocator_type(1));
374 Container C2 = makeContainer(1, allocator_type(2));
375 Container C3 = makeContainer(2, allocator_type(2));
377 CHECK_DEBUG_THROWS( swap(C1, C2) );
381 BasicContainerChecks() = delete;
384 } // namespace IteratorDebugChecks
386 #endif // TEST_SUPPORT_DEBUG_MODE_HELPER_H