Test hijacking ADL for operator& in the stream iterator constructors.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@269838 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/iterators/stream.iterators/ostream.iterator/ostream.iterator.cons.des/ostream.pass.cpp

@@ -17,9 +17,23 @@
 #include <sstream>
 #include <cassert>
 
+struct MyTraits : std::char_traits<char> {};
+
+typedef std::basic_ostringstream<char, MyTraits> StringStream;
+typedef std::basic_ostream<char, MyTraits> BasicStream;
+
+void operator&(BasicStream const&) {}
+
 int main()
 {
-    std::ostringstream outf;
-    std::ostream_iterator<int> i(outf);
-    assert(outf.good());
+    {
+        std::ostringstream outf;
+        std::ostream_iterator<int> i(outf);
+        assert(outf.good());
+    }
+    {
+        StringStream outf;
+        std::ostream_iterator<int, char, MyTraits> i(outf);
+        assert(outf.good());
+    }
 }

test/std/iterators/stream.iterators/ostream.iterator/ostream.iterator.cons.des/ostream_delim.pass.cpp

@@ -17,6 +17,14 @@
 #include <sstream>
 #include <cassert>
 
+
+struct MyTraits : std::char_traits<char> {};
+
+typedef std::basic_ostringstream<char, MyTraits> StringStream;
+typedef std::basic_ostream<char, MyTraits> BasicStream;
+
+void operator&(BasicStream const&) {}
+
 int main()
 {
     {
@@ -29,4 +37,9 @@ int main()
         std::ostream_iterator<double, wchar_t> i(outf, L", ");
         assert(outf.good());
     }
+    {
+        StringStream outf;
+        std::ostream_iterator<int, char, MyTraits> i(outf, ", ");
+        assert(outf.good());
+    }
 }