149 lines
6.0 KiB
C++
149 lines
6.0 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<class ForwardIterator, class Size, class T, class BinaryPredicate>
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// ForwardIterator
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// search_n(ForwardIterator first, ForwardIterator last, Size count,
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// const T& value, BinaryPredicate pred);
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#include <algorithm>
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#include <cassert>
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#include "test_iterators.h"
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struct count_equal
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{
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static unsigned count;
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template <class T>
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bool operator()(const T& x, const T& y)
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{++count; return x == y;}
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};
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unsigned count_equal::count = 0;
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template <class Iter>
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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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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), 0, 0, count_equal()) == Iter(ia));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), 1, 0, count_equal()) == Iter(ia+0));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), 2, 0, count_equal()) == Iter(ia+sa));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), sa, 0, count_equal()) == Iter(ia+sa));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), 0, 3, count_equal()) == Iter(ia));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), 1, 3, count_equal()) == Iter(ia+3));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), 2, 3, count_equal()) == Iter(ia+sa));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), sa, 3, count_equal()) == Iter(ia+sa));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), 0, 5, count_equal()) == Iter(ia));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), 1, 5, count_equal()) == Iter(ia+5));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), 2, 5, count_equal()) == Iter(ia+sa));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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assert(std::search_n(Iter(ia), Iter(ia+sa), sa, 5, count_equal()) == Iter(ia+sa));
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assert(count_equal::count <= sa);
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count_equal::count = 0;
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int ib[] = {0, 0, 1, 1, 2, 2};
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const unsigned sb = sizeof(ib)/sizeof(ib[0]);
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assert(std::search_n(Iter(ib), Iter(ib+sb), 0, 0, count_equal()) == Iter(ib));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 1, 0, count_equal()) == Iter(ib+0));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 2, 0, count_equal()) == Iter(ib+0));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 3, 0, count_equal()) == Iter(ib+sb));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), sb, 0, count_equal()) == Iter(ib+sb));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 0, 1, count_equal()) == Iter(ib));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 1, 1, count_equal()) == Iter(ib+2));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 2, 1, count_equal()) == Iter(ib+2));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 3, 1, count_equal()) == Iter(ib+sb));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), sb, 1, count_equal()) == Iter(ib+sb));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 0, 2, count_equal()) == Iter(ib));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 1, 2, count_equal()) == Iter(ib+4));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 2, 2, count_equal()) == Iter(ib+4));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), 3, 2, count_equal()) == Iter(ib+sb));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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assert(std::search_n(Iter(ib), Iter(ib+sb), sb, 2, count_equal()) == Iter(ib+sb));
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assert(count_equal::count <= sb);
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count_equal::count = 0;
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int ic[] = {0, 0, 0};
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const unsigned sc = sizeof(ic)/sizeof(ic[0]);
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assert(std::search_n(Iter(ic), Iter(ic+sc), 0, 0, count_equal()) == Iter(ic));
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assert(count_equal::count <= sc);
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count_equal::count = 0;
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assert(std::search_n(Iter(ic), Iter(ic+sc), 1, 0, count_equal()) == Iter(ic));
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assert(count_equal::count <= sc);
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count_equal::count = 0;
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assert(std::search_n(Iter(ic), Iter(ic+sc), 2, 0, count_equal()) == Iter(ic));
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assert(count_equal::count <= sc);
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count_equal::count = 0;
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assert(std::search_n(Iter(ic), Iter(ic+sc), 3, 0, count_equal()) == Iter(ic));
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assert(count_equal::count <= sc);
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count_equal::count = 0;
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assert(std::search_n(Iter(ic), Iter(ic+sc), 4, 0, count_equal()) == Iter(ic+sc));
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assert(count_equal::count <= sc);
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count_equal::count = 0;
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}
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int main()
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{
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test<forward_iterator<const int*> >();
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test<bidirectional_iterator<const int*> >();
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test<random_access_iterator<const int*> >();
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}
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