| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <algorithm> |
| |
| // template<ForwardIterator Iter, class T, Predicate<auto, T, Iter::value_type> Compare> |
| // constexpr Iter // constexpr after c++17 |
| // upper_bound(Iter first, Iter last, const T& value, Compare comp); |
| |
| #include <algorithm> |
| #include <functional> |
| #include <vector> |
| #include <cassert> |
| #include <cstddef> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| |
| #if TEST_STD_VER > 17 |
| TEST_CONSTEXPR bool lt(int a, int b) { return a < b; } |
| |
| TEST_CONSTEXPR bool test_constexpr() { |
| int ia[] = {1, 3, 6, 7}; |
| |
| return (std::upper_bound(std::begin(ia), std::end(ia), 2, lt) == ia+1) |
| && (std::upper_bound(std::begin(ia), std::end(ia), 3, lt) == ia+2) |
| && (std::upper_bound(std::begin(ia), std::end(ia), 9, lt) == std::end(ia)) |
| ; |
| } |
| #endif |
| |
| template <class Iter, class T> |
| void |
| test(Iter first, Iter last, const T& value) |
| { |
| Iter i = std::upper_bound(first, last, value, std::greater<int>()); |
| for (Iter j = first; j != i; ++j) |
| assert(!std::greater<int>()(value, *j)); |
| for (Iter j = i; j != last; ++j) |
| assert(std::greater<int>()(value, *j)); |
| } |
| |
| template <class Iter> |
| void |
| test() |
| { |
| const unsigned N = 1000; |
| const int M = 10; |
| std::vector<int> v(N); |
| int x = 0; |
| for (std::size_t i = 0; i < v.size(); ++i) |
| { |
| v[i] = x; |
| if (++x == M) |
| x = 0; |
| } |
| std::sort(v.begin(), v.end(), std::greater<int>()); |
| for (x = 0; x <= M; ++x) |
| test(Iter(v.data()), Iter(v.data()+v.size()), x); |
| } |
| |
| int main(int, char**) |
| { |
| int d[] = {3, 2, 1, 0}; |
| for (int* e = d; e <= d+4; ++e) |
| for (int x = -1; x <= 4; ++x) |
| test(d, e, x); |
| |
| test<forward_iterator<const int*> >(); |
| test<bidirectional_iterator<const int*> >(); |
| test<random_access_iterator<const int*> >(); |
| test<const int*>(); |
| |
| #if TEST_STD_VER > 17 |
| static_assert(test_constexpr()); |
| #endif |
| |
| return 0; |
| } |