libcxx/test/std/algorithms/alg.nonmodifying/alg.find.first.of/find_first_of_pred.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <algorithm>

// template<InputIterator Iter1, ForwardIterator Iter2,
//          Predicate<auto, Iter1::value_type, Iter2::value_type> Pred>
//   requires CopyConstructible<Pred>
//   Iter1
//   find_first_of(Iter1 first1, Iter1 last1, Iter2 first2, Iter2 last2, Pred pred);

#include <algorithm>
#include <functional>
#include <cassert>

#include "test_iterators.h"

int main()
{
    int ia[] = {0, 1, 2, 3, 0, 1, 2, 3};
    const unsigned sa = sizeof(ia)/sizeof(ia[0]);
    int ib[] = {1, 3, 5, 7};
    const unsigned sb = sizeof(ib)/sizeof(ib[0]);
    assert(std::find_first_of(input_iterator<const int*>(ia),
                              input_iterator<const int*>(ia + sa),
                              forward_iterator<const int*>(ib),
                              forward_iterator<const int*>(ib + sb),
                              std::equal_to<int>()) ==
                              input_iterator<const int*>(ia+1));
    int ic[] = {7};
    assert(std::find_first_of(input_iterator<const int*>(ia),
                              input_iterator<const int*>(ia + sa),
                              forward_iterator<const int*>(ic),
                              forward_iterator<const int*>(ic + 1),
                              std::equal_to<int>()) ==
                              input_iterator<const int*>(ia+sa));
    assert(std::find_first_of(input_iterator<const int*>(ia),
                              input_iterator<const int*>(ia + sa),
                              forward_iterator<const int*>(ic),
                              forward_iterator<const int*>(ic),
                              std::equal_to<int>()) ==
                              input_iterator<const int*>(ia+sa));
    assert(std::find_first_of(input_iterator<const int*>(ia),
                              input_iterator<const int*>(ia),
                              forward_iterator<const int*>(ic),
                              forward_iterator<const int*>(ic+1),
                              std::equal_to<int>()) ==
                              input_iterator<const int*>(ia));
}