114 lines
5.2 KiB
C++
114 lines
5.2 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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// UNSUPPORTED: c++03, c++11, c++14
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// <functional>
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// default searcher
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// template<class _ForwardIterator, class _BinaryPredicate = equal_to<>>
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// class default_searcher {
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// public:
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// default_searcher(_ForwardIterator __f, _ForwardIterator __l,
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// _BinaryPredicate __p = _BinaryPredicate())
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// : __first_(__f), __last_(__l), __pred_(__p) {}
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//
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// template <typename _ForwardIterator2>
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// pair<_ForwardIterator2, _ForwardIterator2>
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// operator () (_ForwardIterator2 __f, _ForwardIterator2 __l) const {
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// return std::search(__f, __l, __first_, __last_, __pred_);
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// }
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//
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// private:
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// _ForwardIterator __first_;
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// _ForwardIterator __last_;
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// _BinaryPredicate __pred_;
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// };
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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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template <typename Iter1, typename Iter2>
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TEST_CONSTEXPR_CXX20
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void do_search(Iter1 b1, Iter1 e1, Iter2 b2, Iter2 e2, Iter1 result) {
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std::default_searcher<Iter2> s{b2, e2};
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assert(result == std::search(b1, e1, s));
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}
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template <class Iter1, class Iter2>
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TEST_CONSTEXPR_CXX20
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bool test()
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{
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int ia[] = {0, 1, 2, 3, 4, 5};
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const unsigned sa = sizeof(ia)/sizeof(ia[0]);
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do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia), Iter1(ia));
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do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+1), Iter1(ia));
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do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+1), Iter2(ia+2), Iter1(ia+1));
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do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+2), Iter1(ia));
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do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3), Iter1(ia+2));
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do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3), Iter1(ia+2));
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do_search(Iter1(ia), Iter1(ia), Iter2(ia+2), Iter2(ia+3), Iter1(ia));
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do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-1), Iter2(ia+sa), Iter1(ia+sa-1));
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do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-3), Iter2(ia+sa), Iter1(ia+sa-3));
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do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+sa), Iter1(ia));
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do_search(Iter1(ia), Iter1(ia+sa-1), Iter2(ia), Iter2(ia+sa), Iter1(ia+sa-1));
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do_search(Iter1(ia), Iter1(ia+1), Iter2(ia), Iter2(ia+sa), Iter1(ia+1));
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int ib[] = {0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4};
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const unsigned sb = sizeof(ib)/sizeof(ib[0]);
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int ic[] = {1};
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do_search(Iter1(ib), Iter1(ib+sb), Iter2(ic), Iter2(ic+1), Iter1(ib+1));
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int id[] = {1, 2};
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do_search(Iter1(ib), Iter1(ib+sb), Iter2(id), Iter2(id+2), Iter1(ib+1));
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int ie[] = {1, 2, 3};
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do_search(Iter1(ib), Iter1(ib+sb), Iter2(ie), Iter2(ie+3), Iter1(ib+4));
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int ig[] = {1, 2, 3, 4};
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do_search(Iter1(ib), Iter1(ib+sb), Iter2(ig), Iter2(ig+4), Iter1(ib+8));
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int ih[] = {0, 1, 1, 1, 1, 2, 3, 0, 1, 2, 3, 4};
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const unsigned sh = sizeof(ih)/sizeof(ih[0]);
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int ii[] = {1, 1, 2};
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do_search(Iter1(ih), Iter1(ih+sh), Iter2(ii), Iter2(ii+3), Iter1(ih+3));
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int ij[] = {0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0};
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const unsigned sj = sizeof(ij)/sizeof(ij[0]);
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int ik[] = {0, 0, 0, 0, 1, 1, 1, 1, 0, 0};
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const unsigned sk = sizeof(ik)/sizeof(ik[0]);
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do_search(Iter1(ij), Iter1(ij+sj), Iter2(ik), Iter2(ik+sk), Iter1(ij+6));
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return true;
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}
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int main(int, char**) {
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test<forward_iterator<const int*>, forward_iterator<const int*> >();
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test<forward_iterator<const int*>, bidirectional_iterator<const int*> >();
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test<forward_iterator<const int*>, random_access_iterator<const int*> >();
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test<bidirectional_iterator<const int*>, forward_iterator<const int*> >();
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test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*> >();
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test<bidirectional_iterator<const int*>, random_access_iterator<const int*> >();
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test<random_access_iterator<const int*>, forward_iterator<const int*> >();
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test<random_access_iterator<const int*>, bidirectional_iterator<const int*> >();
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test<random_access_iterator<const int*>, random_access_iterator<const int*> >();
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#if TEST_STD_VER >= 20
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static_assert(test<forward_iterator<const int*>, forward_iterator<const int*>>());
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static_assert(test<forward_iterator<const int*>, bidirectional_iterator<const int*>>());
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static_assert(test<forward_iterator<const int*>, random_access_iterator<const int*>>());
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static_assert(test<bidirectional_iterator<const int*>, forward_iterator<const int*>>());
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static_assert(test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>>());
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static_assert(test<bidirectional_iterator<const int*>, random_access_iterator<const int*>>());
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static_assert(test<random_access_iterator<const int*>, forward_iterator<const int*>>());
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static_assert(test<random_access_iterator<const int*>, bidirectional_iterator<const int*>>());
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static_assert(test<random_access_iterator<const int*>, random_access_iterator<const int*>>());
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#endif
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return 0;
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}
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