sources/cxx-stl/llvm-libc++/test/std/iterators/predef.iterators/move.iterators/move.iter.ops/move.iter.op.comp/op_lt.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.
//
//===----------------------------------------------------------------------===//

// <iterator>

// move_iterator

// template <RandomAccessIterator Iter1, RandomAccessIterator Iter2>
//   requires HasLess<Iter1, Iter2>
//   bool
//   operator<(const move_iterator<Iter1>& x, const move_iterator<Iter2>& y);
//
//  constexpr in C++17

#include <iterator>
#include <cassert>

#include "test_macros.h"
#include "test_iterators.h"

template <class It>
void
test(It l, It r, bool x)
{
    const std::move_iterator<It> r1(l);
    const std::move_iterator<It> r2(r);
    assert((r1 < r2) == x);
}

int main()
{
    char s[] = "1234567890";
    test(random_access_iterator<char*>(s), random_access_iterator<char*>(s), false);
    test(random_access_iterator<char*>(s), random_access_iterator<char*>(s+1), true);
    test(random_access_iterator<char*>(s+1), random_access_iterator<char*>(s), false);
    test(s, s, false);
    test(s, s+1, true);
    test(s+1, s, false);

#if TEST_STD_VER > 14
    {
    constexpr const char *p = "123456789";
    typedef std::move_iterator<const char *> MI;
    constexpr MI it1 = std::make_move_iterator(p);
    constexpr MI it2 = std::make_move_iterator(p + 5);
    constexpr MI it3 = std::make_move_iterator(p);
    static_assert( (it1 < it2), "");
    static_assert(!(it1 < it3), "");
    static_assert(!(it2 < it3), "");
    }
#endif
}