vendor/libc++/libc++-release_370-r246257

4 files changed, 712 insertions, 0 deletions

diff --git a/test/std/algorithms/alg.sorting/alg.merge/inplace_merge.pass.cpp b/test/std/algorithms/alg.sorting/alg.merge/inplace_merge.pass.cpp
new file mode 100644
index 000000000000..829157353fb3
--- /dev/null
+++ b/test/std/algorithms/alg.sorting/alg.merge/inplace_merge.pass.cpp
@@ -0,0 +1,108 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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<BidirectionalIterator Iter>
+//   requires ShuffleIterator<Iter>
+//         && LessThanComparable<Iter::value_type>
+//   void
+//   inplace_merge(Iter first, Iter middle, Iter last);
+
+#include <algorithm>
+#include <cassert>
+
+#include "test_iterators.h"
+
+#if TEST_STD_VER >= 11
+struct S {
+	S() : i_(0) {}
+	S(int i) : i_(i) {}
+	
+	S(const S&  rhs) : i_(rhs.i_) {}
+	S(      S&& rhs) : i_(rhs.i_) { rhs.i_ = -1; }
+	
+	S& operator =(const S&  rhs) { i_ = rhs.i_;              return *this; }
+	S& operator =(      S&& rhs) { i_ = rhs.i_; rhs.i_ = -2; assert(this != &rhs); return *this; }
+	S& operator =(int i)         { i_ = i;                   return *this; }
+	
+	bool operator  <(const S&  rhs) const { return i_ < rhs.i_; }
+	bool operator ==(const S&  rhs) const { return i_ == rhs.i_; }
+	bool operator ==(int i)         const { return i_ == i; }
+
+	void set(int i) { i_ = i; }
+	
+	int i_;
+	};
+#endif
+
+template <class Iter>
+void
+test_one(unsigned N, unsigned M)
+{
+    typedef typename std::iterator_traits<Iter>::value_type value_type;
+    assert(M <= N);
+    value_type* ia = new value_type[N];
+    for (unsigned i = 0; i < N; ++i)
+        ia[i] = i;
+    std::random_shuffle(ia, ia+N);
+    std::sort(ia, ia+M);
+    std::sort(ia+M, ia+N);
+    std::inplace_merge(Iter(ia), Iter(ia+M), Iter(ia+N));
+    if(N > 0)
+    {
+        assert(ia[0] == 0);
+        assert(ia[N-1] == N-1);
+        assert(std::is_sorted(ia, ia+N));
+    }
+    delete [] ia;
+}
+
+template <class Iter>
+void
+test(unsigned N)
+{
+    test_one<Iter>(N, 0);
+    test_one<Iter>(N, N/4);
+    test_one<Iter>(N, N/2);
+    test_one<Iter>(N, 3*N/4);
+    test_one<Iter>(N, N);
+}
+
+template <class Iter>
+void
+test()
+{
+    test_one<Iter>(0, 0);
+    test_one<Iter>(1, 0);
+    test_one<Iter>(1, 1);
+    test_one<Iter>(2, 0);
+    test_one<Iter>(2, 1);
+    test_one<Iter>(2, 2);
+    test_one<Iter>(3, 0);
+    test_one<Iter>(3, 1);
+    test_one<Iter>(3, 2);
+    test_one<Iter>(3, 3);
+    test<Iter>(4);
+    test<Iter>(100);
+    test<Iter>(1000);
+}
+
+int main()
+{
+    test<bidirectional_iterator<int*> >();
+    test<random_access_iterator<int*> >();
+    test<int*>();
+
+#if TEST_STD_VER >= 11
+    test<bidirectional_iterator<S*> >();
+    test<random_access_iterator<S*> >();
+    test<S*>();
+#endif  // TEST_STD_VER >= 11
+}
diff --git a/test/std/algorithms/alg.sorting/alg.merge/inplace_merge_comp.pass.cpp b/test/std/algorithms/alg.sorting/alg.merge/inplace_merge_comp.pass.cpp
new file mode 100644
index 000000000000..ca6f8e40cbd3
--- /dev/null
+++ b/test/std/algorithms/alg.sorting/alg.merge/inplace_merge_comp.pass.cpp
@@ -0,0 +1,146 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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<BidirectionalIterator Iter, StrictWeakOrder<auto, Iter::value_type> Compare>
+//   requires ShuffleIterator<Iter>
+//         && CopyConstructible<Compare>
+//   void
+//   inplace_merge(Iter first, Iter middle, Iter last, Compare comp);
+
+#include <algorithm>
+#include <functional>
+#include <cassert>
+
+#include "test_macros.h"
+
+#if TEST_STD_VER >= 11
+#include <memory>
+
+struct indirect_less
+{
+    template <class P>
+    bool operator()(const P& x, const P& y)
+        {return *x < *y;}
+};
+
+struct S {
+	S() : i_(0) {}
+	S(int i) : i_(i) {}
+	
+	S(const S&  rhs) : i_(rhs.i_) {}
+	S(      S&& rhs) : i_(rhs.i_) { rhs.i_ = -1; }
+	
+	S& operator =(const S&  rhs) { i_ = rhs.i_;              return *this; }
+	S& operator =(      S&& rhs) { i_ = rhs.i_; rhs.i_ = -2; assert(this != &rhs); return *this; }
+	S& operator =(int i)         { i_ = i;                   return *this; }
+	
+	bool operator  <(const S&  rhs) const { return i_ < rhs.i_; }
+	bool operator  >(const S&  rhs) const { return i_ > rhs.i_; }
+	bool operator ==(const S&  rhs) const { return i_ == rhs.i_; }
+	bool operator ==(int i)         const { return i_ == i; }
+
+	void set(int i) { i_ = i; }
+	
+	int i_;
+	};
+
+
+#endif  // TEST_STD_VER >= 11
+
+#include "test_iterators.h"
+#include "counting_predicates.hpp"
+
+template <class Iter>
+void
+test_one(unsigned N, unsigned M)
+{
+    assert(M <= N);
+    typedef typename std::iterator_traits<Iter>::value_type value_type;
+    value_type* ia = new value_type[N];
+    for (unsigned i = 0; i < N; ++i)
+        ia[i] = i;
+    std::random_shuffle(ia, ia+N);
+    std::sort(ia, ia+M, std::greater<value_type>());
+    std::sort(ia+M, ia+N, std::greater<value_type>());
+    binary_counting_predicate<std::greater<value_type>, value_type, value_type> pred((std::greater<value_type>()));
+    std::inplace_merge(Iter(ia), Iter(ia+M), Iter(ia+N), std::ref(pred));
+    if(N > 0)
+    {
+        assert(ia[0] == N-1);
+        assert(ia[N-1] == 0);
+        assert(std::is_sorted(ia, ia+N, std::greater<value_type>()));
+        assert(pred.count() <= (N-1));
+    }
+    delete [] ia;
+}
+
+template <class Iter>
+void
+test(unsigned N)
+{
+    test_one<Iter>(N, 0);
+    test_one<Iter>(N, N/4);
+    test_one<Iter>(N, N/2);
+    test_one<Iter>(N, 3*N/4);
+    test_one<Iter>(N, N);
+}
+
+template <class Iter>
+void
+test()
+{
+    test_one<Iter>(0, 0);
+    test_one<Iter>(1, 0);
+    test_one<Iter>(1, 1);
+    test_one<Iter>(2, 0);
+    test_one<Iter>(2, 1);
+    test_one<Iter>(2, 2);
+    test_one<Iter>(3, 0);
+    test_one<Iter>(3, 1);
+    test_one<Iter>(3, 2);
+    test_one<Iter>(3, 3);
+    test<Iter>(4);
+    test<Iter>(20);
+    test<Iter>(100);
+    test<Iter>(1000);
+}
+
+int main()
+{
+    test<bidirectional_iterator<int*> >();
+    test<random_access_iterator<int*> >();
+    test<int*>();
+
+#if TEST_STD_VER >= 11
+    test<bidirectional_iterator<S*> >();
+    test<random_access_iterator<S*> >();
+    test<S*>();
+
+    {
+    unsigned N = 100;
+    unsigned M = 50;
+    std::unique_ptr<int>* ia = new std::unique_ptr<int>[N];
+    for (unsigned i = 0; i < N; ++i)
+        ia[i].reset(new int(i));
+    std::random_shuffle(ia, ia+N);
+    std::sort(ia, ia+M, indirect_less());
+    std::sort(ia+M, ia+N, indirect_less());
+    std::inplace_merge(ia, ia+M, ia+N, indirect_less());
+    if(N > 0)
+    {
+        assert(*ia[0] == 0);
+        assert(*ia[N-1] == N-1);
+        assert(std::is_sorted(ia, ia+N, indirect_less()));
+    }
+    delete [] ia;
+    }
+#endif  // TEST_STD_VER >= 11
+}
diff --git a/test/std/algorithms/alg.sorting/alg.merge/merge.pass.cpp b/test/std/algorithms/alg.sorting/alg.merge/merge.pass.cpp
new file mode 100644
index 000000000000..de96c419c4ea
--- /dev/null
+++ b/test/std/algorithms/alg.sorting/alg.merge/merge.pass.cpp
@@ -0,0 +1,224 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+//
+// REQUIRES: long_tests
+
+// <algorithm>
+
+// template<InputIterator InIter1, InputIterator InIter2, typename OutIter>
+//   requires OutputIterator<OutIter, InIter1::reference>
+//         && OutputIterator<OutIter, InIter2::reference>
+//         && HasLess<InIter2::value_type, InIter1::value_type>
+//   OutIter
+//   merge(InIter1 first1, InIter1 last1, InIter2 first2, InIter2 last2, OutIter result);
+
+#include <algorithm>
+#include <cassert>
+
+#include "test_iterators.h"
+
+template <class InIter1, class InIter2, class OutIter>
+void
+test()
+{
+    {
+    unsigned N = 100000;
+    int* ia = new int[N];
+    int* ib = new int[N];
+    int* ic = new int[2*N];
+    for (unsigned i = 0; i < N; ++i)
+        ia[i] = 2*i;
+    for (unsigned i = 0; i < N; ++i)
+        ib[i] = 2*i+1;
+    OutIter r = std::merge(InIter1(ia), InIter1(ia+N),
+                           InIter2(ib), InIter2(ib+N), OutIter(ic));
+    assert(base(r) == ic+2*N);
+    assert(ic[0] == 0);
+    assert(ic[2*N-1] == 2*N-1);
+    assert(std::is_sorted(ic, ic+2*N));
+    delete [] ic;
+    delete [] ib;
+    delete [] ia;
+    }
+    {
+    unsigned N = 100;
+    int* ia = new int[N];
+    int* ib = new int[N];
+    int* ic = new int[2*N];
+    for (unsigned i = 0; i < 2*N; ++i)
+        ic[i] = i;
+    std::random_shuffle(ic, ic+2*N);
+    std::copy(ic, ic+N, ia);
+    std::copy(ic+N, ic+2*N, ib);
+    std::sort(ia, ia+N);
+    std::sort(ib, ib+N);
+    OutIter r = std::merge(InIter1(ia), InIter1(ia+N),
+                           InIter2(ib), InIter2(ib+N), OutIter(ic));
+    assert(base(r) == ic+2*N);
+    assert(ic[0] == 0);
+    assert(ic[2*N-1] == 2*N-1);
+    assert(std::is_sorted(ic, ic+2*N));
+    delete [] ic;
+    delete [] ib;
+    delete [] ia;
+    }
+}
+
+int main()
+{
+    test<input_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >();
+    test<input_iterator<const int*>, input_iterator<const int*>, forward_iterator<int*> >();
+    test<input_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<input_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >();
+    test<input_iterator<const int*>, input_iterator<const int*>, int*>();
+
+    test<input_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >();
+    test<input_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >();
+    test<input_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<input_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<input_iterator<const int*>, forward_iterator<const int*>, int*>();
+
+    test<input_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >();
+    test<input_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<input_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<input_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<input_iterator<const int*>, bidirectional_iterator<const int*>, int*>();
+
+    test<input_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >();
+    test<input_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<input_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<input_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<input_iterator<const int*>, random_access_iterator<const int*>, int*>();
+
+    test<input_iterator<const int*>, const int*, output_iterator<int*> >();
+    test<input_iterator<const int*>, const int*, forward_iterator<int*> >();
+    test<input_iterator<const int*>, const int*, bidirectional_iterator<int*> >();
+    test<input_iterator<const int*>, const int*, random_access_iterator<int*> >();
+    test<input_iterator<const int*>, const int*, int*>();
+
+    test<forward_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >();
+    test<forward_iterator<const int*>, input_iterator<const int*>, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, input_iterator<const int*>, int*>();
+
+    test<forward_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >();
+    test<forward_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, forward_iterator<const int*>, int*>();
+
+    test<forward_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >();
+    test<forward_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, bidirectional_iterator<const int*>, int*>();
+
+    test<forward_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >();
+    test<forward_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, random_access_iterator<const int*>, int*>();
+
+    test<forward_iterator<const int*>, const int*, output_iterator<int*> >();
+    test<forward_iterator<const int*>, const int*, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, const int*, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, const int*, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, const int*, int*>();
+
+    test<bidirectional_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, input_iterator<const int*>, int*>();
+
+    test<bidirectional_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, forward_iterator<const int*>, int*>();
+
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, int*>();
+
+    test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, int*>();
+
+    test<bidirectional_iterator<const int*>, const int*, output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, const int*, forward_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, const int*, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, const int*, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, const int*, int*>();
+
+    test<random_access_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >();
+    test<random_access_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, input_iterator<const int*>, int*>();
+
+    test<random_access_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >();
+    test<random_access_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >();
+    test<random_access_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, forward_iterator<const int*>, int*>();
+
+    test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >();
+    test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, int*>();
+
+    test<random_access_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >();
+    test<random_access_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<random_access_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, random_access_iterator<const int*>, int*>();
+
+    test<random_access_iterator<const int*>, const int*, output_iterator<int*> >();
+    test<random_access_iterator<const int*>, const int*, forward_iterator<int*> >();
+    test<random_access_iterator<const int*>, const int*, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, const int*, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, const int*, int*>();
+
+    test<const int*, input_iterator<const int*>, output_iterator<int*> >();
+    test<const int*, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<const int*, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<const int*, input_iterator<const int*>, random_access_iterator<int*> >();
+    test<const int*, input_iterator<const int*>, int*>();
+
+    test<const int*, forward_iterator<const int*>, output_iterator<int*> >();
+    test<const int*, forward_iterator<const int*>, forward_iterator<int*> >();
+    test<const int*, forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<const int*, forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<const int*, forward_iterator<const int*>, int*>();
+
+    test<const int*, bidirectional_iterator<const int*>, output_iterator<int*> >();
+    test<const int*, bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<const int*, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<const int*, bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<const int*, bidirectional_iterator<const int*>, int*>();
+
+    test<const int*, random_access_iterator<const int*>, output_iterator<int*> >();
+    test<const int*, random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<const int*, random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<const int*, random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<const int*, random_access_iterator<const int*>, int*>();
+
+    test<const int*, const int*, output_iterator<int*> >();
+    test<const int*, const int*, forward_iterator<int*> >();
+    test<const int*, const int*, bidirectional_iterator<int*> >();
+    test<const int*, const int*, random_access_iterator<int*> >();
+    test<const int*, const int*, int*>();
+}
diff --git a/test/std/algorithms/alg.sorting/alg.merge/merge_comp.pass.cpp b/test/std/algorithms/alg.sorting/alg.merge/merge_comp.pass.cpp
new file mode 100644
index 000000000000..bd38d7de6894
--- /dev/null
+++ b/test/std/algorithms/alg.sorting/alg.merge/merge_comp.pass.cpp
@@ -0,0 +1,234 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+//
+// REQUIRES: long_tests
+
+// <algorithm>
+
+// template<InputIterator InIter1, InputIterator InIter2, typename OutIter,
+//          Predicate<auto, InIter2::value_type, InIter1::value_type> Compare>
+//   requires OutputIterator<OutIter, InIter1::reference>
+//         && OutputIterator<OutIter, InIter2::reference>
+//         && CopyConstructible<Compare>
+//   OutIter
+//   merge(InIter1 first1, InIter1 last1,
+//         InIter2 first2, InIter2 last2, OutIter result, Compare comp);
+
+#include <algorithm>
+#include <functional>
+#include <cassert>
+
+#include "test_iterators.h"
+#include "counting_predicates.hpp"
+
+template <class InIter1, class InIter2, class OutIter>
+void
+test()
+{
+    {
+    unsigned N = 100000;
+    int* ia = new int[N];
+    int* ib = new int[N];
+    int* ic = new int[2*N];
+    for (unsigned i = 0; i < N; ++i)
+        ia[i] = 2*i;
+    for (unsigned i = 0; i < N; ++i)
+        ib[i] = 2*i+1;
+    std::reverse(ia, ia+N);
+    std::reverse(ib, ib+N);
+    binary_counting_predicate<std::greater<int>, int, int> pred((std::greater<int>()));
+    OutIter r = std::merge(InIter1(ia), InIter1(ia+N),
+                           InIter2(ib), InIter2(ib+N), OutIter(ic), pred);
+    assert(base(r) == ic+2*N);
+    assert(ic[0] == 2*N-1);
+    assert(ic[2*N-1] == 0);
+    assert(std::is_sorted(ic, ic+2*N, std::greater<int>()));
+    assert(pred.count() <= (N + N - 1));
+    delete [] ic;
+    delete [] ib;
+    delete [] ia;
+    }
+    {
+    unsigned N = 100;
+    int* ia = new int[N];
+    int* ib = new int[N];
+    int* ic = new int[2*N];
+    for (unsigned i = 0; i < 2*N; ++i)
+        ic[i] = i;
+    std::random_shuffle(ic, ic+2*N);
+    std::copy(ic, ic+N, ia);
+    std::copy(ic+N, ic+2*N, ib);
+    std::sort(ia, ia+N, std::greater<int>());
+    std::sort(ib, ib+N, std::greater<int>());
+    binary_counting_predicate<std::greater<int>, int, int> pred((std::greater<int>()));
+    OutIter r = std::merge(InIter1(ia), InIter1(ia+N),
+                           InIter2(ib), InIter2(ib+N), OutIter(ic), pred);
+    assert(base(r) == ic+2*N);
+    assert(ic[0] == 2*N-1);
+    assert(ic[2*N-1] == 0);
+    assert(std::is_sorted(ic, ic+2*N, std::greater<int>()));
+    assert(pred.count() <= (N + N - 1));
+    delete [] ic;
+    delete [] ib;
+    delete [] ia;
+    }
+}
+
+int main()
+{
+    test<input_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >();
+    test<input_iterator<const int*>, input_iterator<const int*>, forward_iterator<int*> >();
+    test<input_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<input_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >();
+    test<input_iterator<const int*>, input_iterator<const int*>, int*>();
+
+    test<input_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >();
+    test<input_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >();
+    test<input_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<input_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<input_iterator<const int*>, forward_iterator<const int*>, int*>();
+
+    test<input_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >();
+    test<input_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<input_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<input_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<input_iterator<const int*>, bidirectional_iterator<const int*>, int*>();
+
+    test<input_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >();
+    test<input_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<input_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<input_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<input_iterator<const int*>, random_access_iterator<const int*>, int*>();
+
+    test<input_iterator<const int*>, const int*, output_iterator<int*> >();
+    test<input_iterator<const int*>, const int*, forward_iterator<int*> >();
+    test<input_iterator<const int*>, const int*, bidirectional_iterator<int*> >();
+    test<input_iterator<const int*>, const int*, random_access_iterator<int*> >();
+    test<input_iterator<const int*>, const int*, int*>();
+
+    test<forward_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >();
+    test<forward_iterator<const int*>, input_iterator<const int*>, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, input_iterator<const int*>, int*>();
+
+    test<forward_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >();
+    test<forward_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, forward_iterator<const int*>, int*>();
+
+    test<forward_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >();
+    test<forward_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, bidirectional_iterator<const int*>, int*>();
+
+    test<forward_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >();
+    test<forward_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, random_access_iterator<const int*>, int*>();
+
+    test<forward_iterator<const int*>, const int*, output_iterator<int*> >();
+    test<forward_iterator<const int*>, const int*, forward_iterator<int*> >();
+    test<forward_iterator<const int*>, const int*, bidirectional_iterator<int*> >();
+    test<forward_iterator<const int*>, const int*, random_access_iterator<int*> >();
+    test<forward_iterator<const int*>, const int*, int*>();
+
+    test<bidirectional_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, input_iterator<const int*>, int*>();
+
+    test<bidirectional_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, forward_iterator<const int*>, int*>();
+
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, bidirectional_iterator<const int*>, int*>();
+
+    test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, random_access_iterator<const int*>, int*>();
+
+    test<bidirectional_iterator<const int*>, const int*, output_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, const int*, forward_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, const int*, bidirectional_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, const int*, random_access_iterator<int*> >();
+    test<bidirectional_iterator<const int*>, const int*, int*>();
+
+    test<random_access_iterator<const int*>, input_iterator<const int*>, output_iterator<int*> >();
+    test<random_access_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, input_iterator<const int*>, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, input_iterator<const int*>, int*>();
+
+    test<random_access_iterator<const int*>, forward_iterator<const int*>, output_iterator<int*> >();
+    test<random_access_iterator<const int*>, forward_iterator<const int*>, forward_iterator<int*> >();
+    test<random_access_iterator<const int*>, forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, forward_iterator<const int*>, int*>();
+
+    test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, output_iterator<int*> >();
+    test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, bidirectional_iterator<const int*>, int*>();
+
+    test<random_access_iterator<const int*>, random_access_iterator<const int*>, output_iterator<int*> >();
+    test<random_access_iterator<const int*>, random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<random_access_iterator<const int*>, random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, random_access_iterator<const int*>, int*>();
+
+    test<random_access_iterator<const int*>, const int*, output_iterator<int*> >();
+    test<random_access_iterator<const int*>, const int*, forward_iterator<int*> >();
+    test<random_access_iterator<const int*>, const int*, bidirectional_iterator<int*> >();
+    test<random_access_iterator<const int*>, const int*, random_access_iterator<int*> >();
+    test<random_access_iterator<const int*>, const int*, int*>();
+
+    test<const int*, input_iterator<const int*>, output_iterator<int*> >();
+    test<const int*, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<const int*, input_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<const int*, input_iterator<const int*>, random_access_iterator<int*> >();
+    test<const int*, input_iterator<const int*>, int*>();
+
+    test<const int*, forward_iterator<const int*>, output_iterator<int*> >();
+    test<const int*, forward_iterator<const int*>, forward_iterator<int*> >();
+    test<const int*, forward_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<const int*, forward_iterator<const int*>, random_access_iterator<int*> >();
+    test<const int*, forward_iterator<const int*>, int*>();
+
+    test<const int*, bidirectional_iterator<const int*>, output_iterator<int*> >();
+    test<const int*, bidirectional_iterator<const int*>, forward_iterator<int*> >();
+    test<const int*, bidirectional_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<const int*, bidirectional_iterator<const int*>, random_access_iterator<int*> >();
+    test<const int*, bidirectional_iterator<const int*>, int*>();
+
+    test<const int*, random_access_iterator<const int*>, output_iterator<int*> >();
+    test<const int*, random_access_iterator<const int*>, forward_iterator<int*> >();
+    test<const int*, random_access_iterator<const int*>, bidirectional_iterator<int*> >();
+    test<const int*, random_access_iterator<const int*>, random_access_iterator<int*> >();
+    test<const int*, random_access_iterator<const int*>, int*>();
+
+    test<const int*, const int*, output_iterator<int*> >();
+    test<const int*, const int*, forward_iterator<int*> >();
+    test<const int*, const int*, bidirectional_iterator<int*> >();
+    test<const int*, const int*, random_access_iterator<int*> >();
+    test<const int*, const int*, int*>();
+}