| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // REQUIRES: has-unix-headers |
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| 10 | // UNSUPPORTED: c++03 |
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| 11 | // REQUIRES: libcpp-hardening-mode={{extensive|debug}} |
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| 12 | // XFAIL: libcpp-hardening-mode=debug && availability-verbose_abort-missing |
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| 13 | |
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| 14 | // <list> |
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| 15 | |
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| 16 | // Call prev(forward_iterator, -1) |
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| 17 | |
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| 18 | #include <iterator> |
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| 19 | |
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| 20 | #include "check_assertion.h" |
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| 21 | #include "test_iterators.h" |
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| 22 | |
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| 23 | int main(int, char**) { |
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| 24 | int a[] = {1, 2, 3}; |
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| 25 | |
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| 26 | bidirectional_iterator<int *> bidi(a+1); |
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| 27 | std::prev(bidi, -1); // should work fine |
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| 28 | std::prev(bidi, 0); // should work fine |
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| 29 | std::prev(bidi, 1); // should work fine |
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| 30 | |
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| 31 | forward_iterator<int *> it(a+1); |
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| 32 | std::prev(it, -1); // should work fine |
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| 33 | std::prev(it, 0); // should work fine |
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| 34 | TEST_LIBCPP_ASSERT_FAILURE(std::prev(it, 1), "Attempt to prev(it, n) with a positive n on a non-bidirectional iterator" ); |
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| 35 | |
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| 36 | return 0; |
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| 37 | } |
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| 38 | |
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