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Differential D127418 Diff 439482 libcxx/test/libcxx/iterators/bounded_iter/dereference.pass.cpp

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libcxx/test/libcxx/iterators/bounded_iter/dereference.pass.cpp

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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// template <class _Iterator>
// struct __bounded_iter;
//
// Dereference and indexing operators
// REQUIRES: has-unix-headers
// UNSUPPORTED: c++03
// XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx{{10.9|10.10|10.11|10.12|10.13|10.14|10.15|11.0|12.0}}
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_ASSERTIONS=1
#include <iterator>
#include "check_assertion.h"
#include "test_iterators.h"
#include "test_macros.h"
struct Foo {
int x;
TEST_CONSTEXPR bool operator==(Foo const& other) const { return x == other.x; }
};
template <class Iter>
TEST_CONSTEXPR_CXX14 bool tests() {
Foo array[] = {Foo{40}, Foo{41}, Foo{42}, Foo{43}, Foo{44}};
Foo* b = array + 0;
Foo* e = array + 5;
std::__bounded_iter<Iter> const iter1 = std::__make_bounded_iter(Iter(b), Iter(b), Iter(e));
std::__bounded_iter<Iter> const iter2 = std::__make_bounded_iter(Iter(e), Iter(b), Iter(e));
// operator*
assert(*iter1 == Foo{40});
// operator->
assert(iter1->x == 40);
// operator[]
assert(iter1[0] == Foo{40});
assert(iter1[1] == Foo{41});
assert(iter1[2] == Foo{42});
assert(iter2[-1] == Foo{44});
assert(iter2[-2] == Foo{43});
return true;
}
template <class Iter>
void test_death() {
Foo array[] = {Foo{0}, Foo{1}, Foo{2}, Foo{3}, Foo{4}};
Foo* b = array + 0;
Foo* e = array + 5;
std::__bounded_iter<Iter> const iter = std::__make_bounded_iter(Iter(b), Iter(b), Iter(e));
std::__bounded_iter<Iter> const oob = std::__make_bounded_iter(Iter(e), Iter(b), Iter(e));
// operator*
TEST_LIBCPP_ASSERT_FAILURE(*oob, "__bounded_iter::operator*: Attempt to dereference an out-of-range iterator");
// operator->
TEST_LIBCPP_ASSERT_FAILURE(oob->x, "__bounded_iter::operator->: Attempt to dereference an out-of-range iterator");
// operator[]
TEST_LIBCPP_ASSERT_FAILURE(iter[-1], "__bounded_iter::operator[]: Attempt to index an iterator out-of-range");
TEST_LIBCPP_ASSERT_FAILURE(iter[5], "__bounded_iter::operator[]: Attempt to index an iterator out-of-range");
TEST_LIBCPP_ASSERT_FAILURE(oob[0], "__bounded_iter::operator[]: Attempt to index an iterator out-of-range");
TEST_LIBCPP_ASSERT_FAILURE(oob[1], "__bounded_iter::operator[]: Attempt to index an iterator out-of-range");
TEST_LIBCPP_ASSERT_FAILURE(oob[-6], "__bounded_iter::operator[]: Attempt to index an iterator out-of-range");
}
int main(int, char**) {
tests<Foo*>();
test_death<Foo*>();
#if TEST_STD_VER > 11
static_assert(tests<Foo*>(), "");
#endif
#if TEST_STD_VER > 17
tests<contiguous_iterator<Foo*> >();
test_death<contiguous_iterator<Foo*> >();
static_assert(tests<contiguous_iterator<Foo*> >(), "");
#endif
return 0;
}