11c0fd4f44
Until C++20, `std::find_if(_not)` were not `constexpr`, so uses of `TEST_CONSTEXPR_CXX17` make the test functions ill-formed, no diagnostic required in C++17 mode. The uses were introduced in 2b4b26ea84fd9c95d0ff25ce338c15ea5e74a4e4, while the transformation looked incorrect - `TEST_CONSTEXPR_CXX20` should be used instead. Drive-by changes: Fix comments in both changed test files to match the actually standardized wording.
74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <algorithm>
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// template<class InputIterator, class Predicate>
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// constexpr InputIterator find_if(InputIterator first, InputIterator last, Predicate pred); // constexpr since C++20
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#include <algorithm>
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#include <functional>
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#include <cassert>
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#include "test_macros.h"
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#include "test_iterators.h"
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struct EqualTo {
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int v;
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TEST_CONSTEXPR EqualTo(int val) : v(val) {}
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TEST_CONSTEXPR bool operator()(int other) const { return v == other; }
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};
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template <class Iter>
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TEST_CONSTEXPR_CXX20 void test_iter() {
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int range[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
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// We don't find what we're looking for in the range
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{
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{
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Iter result = std::find_if(Iter(range), Iter(range), EqualTo(0));
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assert(result == Iter(range));
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}
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{
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Iter result = std::find_if(Iter(range), Iter(std::end(range)), EqualTo(999));
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assert(result == Iter(std::end(range)));
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}
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}
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// Tests with sub-ranges of various sizes
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for (int size = 1; size != 10; ++size) {
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for (int i = 0; i != size - 1; ++i) {
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Iter result = std::find_if(Iter(range), Iter(range + size), EqualTo(i));
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assert(result == Iter(range + i));
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}
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}
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}
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TEST_CONSTEXPR_CXX20 bool test() {
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test_iter<cpp17_input_iterator<int*> >();
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test_iter<forward_iterator<int*> >();
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test_iter<bidirectional_iterator<int*> >();
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test_iter<random_access_iterator<int*> >();
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{ // Check that [nullptr, nullptr) is an accepted range
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auto result = std::find_if(static_cast<int*>(nullptr), static_cast<int*>(nullptr), [](int i) { return i == 0; });
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assert(result == nullptr);
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}
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return true;
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}
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int main(int, char**) {
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test();
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#if TEST_STD_VER >= 20
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static_assert(test());
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#endif
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return 0;
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}
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