126 lines
5.1 KiB
C++
126 lines
5.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <algorithm>
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// template<ForwardIterator Iter1, ForwardIterator Iter2>
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// requires HasEqualTo<Iter1::value_type, Iter2::value_type>
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// constexpr Iter1 // constexpr after C++17
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// search(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2);
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//
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// template<class ForwardIterator, class Searcher>
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// ForwardIterator search(ForwardIterator first, ForwardIterator last,
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// const Searcher& searcher); // C++17
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#include <algorithm>
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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 MySearcherC {
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template <typename Iterator>
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std::pair<Iterator, Iterator>
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TEST_CONSTEXPR operator() (Iterator b, Iterator e) const
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{
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return std::make_pair(b, e);
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}
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};
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#if TEST_STD_VER > 17
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TEST_CONSTEXPR bool test_constexpr() {
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int ia[] = {0, 1, 2, 3};
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int ib[] = {0, 1, 5, 3};
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int ic[] = {0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4};
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return (std::search(std::begin(ic), std::end(ic), std::begin(ia), std::end(ia)) == ic+3)
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&& (std::search(std::begin(ic), std::end(ic), std::begin(ib), std::end(ib)) == std::end(ic))
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&& (std::search(std::begin(ic), std::end(ic), MySearcherC()) == std::begin(ic))
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;
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}
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#endif
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int searcher_called = 0;
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struct MySearcher {
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template <typename Iterator>
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std::pair<Iterator, Iterator>
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operator() (Iterator b, Iterator e) const
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{
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++searcher_called;
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return std::make_pair(b, e);
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}
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};
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template <class Iter1, class Iter2>
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void
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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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assert(std::search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia)) == Iter1(ia));
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assert(std::search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+1)) == Iter1(ia));
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assert(std::search(Iter1(ia), Iter1(ia+sa), Iter2(ia+1), Iter2(ia+2)) == Iter1(ia+1));
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assert(std::search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+2)) == Iter1(ia));
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assert(std::search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3)) == Iter1(ia+2));
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assert(std::search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3)) == Iter1(ia+2));
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assert(std::search(Iter1(ia), Iter1(ia), Iter2(ia+2), Iter2(ia+3)) == Iter1(ia));
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assert(std::search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-1), Iter2(ia+sa)) == Iter1(ia+sa-1));
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assert(std::search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-3), Iter2(ia+sa)) == Iter1(ia+sa-3));
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assert(std::search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+sa)) == Iter1(ia));
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assert(std::search(Iter1(ia), Iter1(ia+sa-1), Iter2(ia), Iter2(ia+sa)) == Iter1(ia+sa-1));
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assert(std::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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assert(std::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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assert(std::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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assert(std::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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assert(std::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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assert(std::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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assert(std::search(Iter1(ij), Iter1(ij+sj), Iter2(ik), Iter2(ik+sk)) == Iter1(ij+6));
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}
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int main()
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{
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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 > 14
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{
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typedef int * RI;
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static_assert((std::is_same<RI, decltype(std::search(RI(), RI(), MySearcher()))>::value), "" );
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RI it(nullptr);
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assert(it == std::search(it, it, MySearcher()));
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assert(searcher_called == 1);
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}
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#endif
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#if TEST_STD_VER > 17
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static_assert(test_constexpr());
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#endif
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}
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