Give tuple a constexpr default constructor.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@159857 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-06 20:39:45 +00:00
parent a0b5befbd3
commit 5394c1ed30
2 changed files with 23 additions and 3 deletions
--- a/test/utilities/tuple/tuple.tuple/tuple.cnstr/default.pass.cpp
+++ b/test/utilities/tuple/tuple.tuple/tuple.cnstr/default.pass.cpp
@@ -46,4 +46,18 @@ int main()
        assert(std::get<2>(t) == "");
        assert(std::get<3>(t) == DefaultOnly());
    }
+#ifndef _LIBCPP_HAS_NO_CONSTEXPR
+    {
+        constexpr std::tuple<> t;
+    }
+    {
+        constexpr std::tuple<int> t;
+        assert(std::get<0>(t) == 0);
+    }
+    {
+        constexpr std::tuple<int, char*> t;
+        assert(std::get<0>(t) == 0);
+        assert(std::get<1>(t) == nullptr);
+    }
+#endif
 }