libcxx initial import

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8

test/containers/sequences/deque/deque.modifiers/erase_iter_iter.pass.cpp

@@ -0,0 +1,80 @@
+//===----------------------------------------------------------------------===//
+//
+// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <deque>
+
+// iterator erase(const_iterator f, const_iterator l)
+
+#include <deque>
+#include <cassert>
+
+std::deque<int>
+make(int size, int start = 0 )
+{
+    const int b = 4096 / sizeof(int);
+    int init = 0;
+    if (start > 0)
+    {
+        init = (start+1) / b + ((start+1) % b != 0);
+        init *= b;
+        --init;
+    }
+    std::deque<int> c(init, 0);
+    for (int i = 0; i < init-start; ++i)
+        c.pop_back();
+    for (int i = 0; i < size; ++i)
+        c.push_back(i);
+    for (int i = 0; i < start; ++i)
+        c.pop_front();
+    return c;
+};
+
+void
+test(int P, std::deque<int>& c1, int size)
+{
+    typedef std::deque<int> C;
+    typedef C::iterator I;
+    assert(P + size <= c1.size());
+    std::size_t c1_osize = c1.size();
+    I i = c1.erase(c1.cbegin() + P, c1.cbegin() + (P + size));
+    assert(i == c1.begin() + P);
+    assert(c1.size() == c1_osize - size);
+    assert(distance(c1.begin(), c1.end()) == c1.size());
+    i = c1.begin();
+    int j = 0;
+    for (; j < P; ++j, ++i)
+        assert(*i == j);
+    for (j += size; j < c1_osize; ++j, ++i)
+        assert(*i == j);
+}
+
+void
+testN(int start, int N)
+{
+    typedef std::deque<int> C;
+    int pstep = std::max(N / std::max(std::min(N, 10), 1), 1);
+    for (int p = 0; p <= N; p += pstep)
+    {
+        int sstep = std::max((N - p) / std::max(std::min(N - p, 10), 1), 1);
+        for (int s = 0; s <= N - p; s += sstep)
+        {
+            C c1 = make(N, start);
+            test(p, c1, s);
+        }
+    }
+}
+
+int main()
+{
+    int rng[] = {0, 1, 2, 3, 1023, 1024, 1025, 2047, 2048, 2049};
+    const int N = sizeof(rng)/sizeof(rng[0]);
+    for (int i = 0; i < N; ++i)
+        for (int j = 0; j < N; ++j)
+            testN(rng[i], rng[j]);
+}