From 0564cdb94a7a1facbb0dbf888ceb90638aa70ecd Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Mon, 18 Dec 2017 20:12:08 +0000
Subject: Vendor import of libc++ trunk r321017:
 https://llvm.org/svn/llvm-project/libcxx/trunk@321017

---
 .../stringbuf/stringbuf.cons/default.pass.cpp      | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'test/std/input.output/string.streams/stringbuf/stringbuf.cons')

diff --git a/test/std/input.output/string.streams/stringbuf/stringbuf.cons/default.pass.cpp b/test/std/input.output/string.streams/stringbuf/stringbuf.cons/default.pass.cpp
index 28007c8edf45..af2cccc96373 100644
--- a/test/std/input.output/string.streams/stringbuf/stringbuf.cons/default.pass.cpp
+++ b/test/std/input.output/string.streams/stringbuf/stringbuf.cons/default.pass.cpp
@@ -17,6 +17,21 @@
 #include <sstream>
 #include <cassert>
 
+template<typename CharT>
+struct testbuf
+    : std::basic_stringbuf<CharT>
+{
+    void check()
+    {
+        assert(this->eback() == NULL);
+        assert(this->gptr() == NULL);
+        assert(this->egptr() == NULL);
+        assert(this->pbase() == NULL);
+        assert(this->pptr() == NULL);
+        assert(this->epptr() == NULL);
+    }
+};
+
 int main()
 {
     {
@@ -27,4 +42,12 @@ int main()
         std::wstringbuf buf;
         assert(buf.str() == L"");
     }
+    {
+        testbuf<char> buf;
+        buf.check();
+    }
+    {
+        testbuf<wchar_t> buf;
+        buf.check();
+    }
 }
-- 
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