I believe this finishes up debug mode for list. The testing is a little weak, but I believe all of the functionality is there. Certainly enough for people to checkout and start beating up on.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@179632 91177308-0d34-0410-b5e6-96231b3b80d8

test/containers/sequences/list/list.ops/splice_pos_list.pass.cpp

@@ -11,6 +11,10 @@
 
 // void splice(const_iterator position, list& x);
 
+#if _LIBCPP_DEBUG2 >= 1
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+#endif
+
 #include <list>
 #include <cassert>
 
@@ -397,4 +401,12 @@ int main()
         ++i;
         assert(*i == 6);
     }
+#if _LIBCPP_DEBUG2 >= 1
+    {
+        std::list<int> v1(3);
+        std::list<int> v2(3);
+        v1.splice(v2.begin(), v2);
+        assert(false);
+    }
+#endif
 }

test/containers/sequences/list/list.ops/splice_pos_list_iter.pass.cpp

@@ -11,6 +11,10 @@
 
 // void splice(const_iterator position, list<T,Allocator>& x, iterator i);
 
+#if _LIBCPP_DEBUG2 >= 1
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+#endif
+
 #include <list>
 #include <cassert>
 
@@ -174,4 +178,12 @@ int main()
         ++i;
         assert(*i == 2);
     }
+#if _LIBCPP_DEBUG2 >= 1
+    {
+        std::list<int> v1(3);
+        std::list<int> v2(3);
+        v1.splice(v1.begin(), v2, v1.begin());
+        assert(false);
+    }
+#endif
 }

test/containers/sequences/list/list.ops/splice_pos_list_iter_iter.pass.cpp

@@ -11,6 +11,10 @@
 
 // void splice(const_iterator position, list& x, iterator first, iterator last);
 
+#if _LIBCPP_DEBUG2 >= 1
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+#endif
+
 #include <list>
 #include <cassert>
 
@@ -114,4 +118,12 @@ int main()
         i = l2.begin();
         assert(*i == 4);
     }
+#if _LIBCPP_DEBUG2 >= 1
+    {
+        std::list<int> v1(3);
+        std::list<int> v2(3);
+        v1.splice(v1.begin(), v2, v2.begin(), v1.end());
+        assert(false);
+    }
+#endif
 }

www/debug_mode.html

@@ -32,7 +32,7 @@ record which parts of libc++ have debug mode support.
 <code>&lt;list&gt;</code>
 </p>
 </td>
-<td><!-- &#10003; --></td>
+<td align="center"> &#10003; </td>
 </tr>
 
 <tr>