1 files changed, 100 insertions, 0 deletions
diff --git a/test/std/localization/locales/locale.convenience/conversions/conversions.buffer/overflow.pass.cpp b/test/std/localization/locales/locale.convenience/conversions/conversions.buffer/overflow.pass.cpp
new file mode 100644
index 0000000000000..24706b5a8e0a0
--- /dev/null
+++ b/test/std/localization/locales/locale.convenience/conversions/conversions.buffer/overflow.pass.cpp
@@ -0,0 +1,100 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <locale>
+
+// wbuffer_convert<Codecvt, Elem, Tr>
+
+// int_type overflow(int_type c = traits::eof());
+
+// This test is not entirely portable
+
+#include <locale>
+#include <codecvt>
+#include <fstream>
+#include <cassert>
+
+struct test_buf
+    : public std::wbuffer_convert<std::codecvt_utf8<wchar_t> >
+{
+    typedef std::wbuffer_convert<std::codecvt_utf8<wchar_t> > base;
+    typedef base::char_type   char_type;
+    typedef base::int_type    int_type;
+    typedef base::traits_type traits_type;
+
+    explicit test_buf(std::streambuf* sb) : base(sb) {}
+
+    char_type* pbase() const {return base::pbase();}
+    char_type* pptr()  const {return base::pptr();}
+    char_type* epptr() const {return base::epptr();}
+    void gbump(int n) {base::gbump(n);}
+
+    virtual int_type overflow(int_type c = traits_type::eof()) {return base::overflow(c);}
+};
+
+int main()
+{
+    {
+        std::ofstream bs("overflow.dat");
+        test_buf f(bs.rdbuf());
+        assert(f.pbase() == 0);
+        assert(f.pptr() == 0);
+        assert(f.epptr() == 0);
+        assert(f.overflow(L'a') == L'a');
+        assert(f.pbase() != 0);
+        assert(f.pptr() == f.pbase());
+        assert(f.epptr() - f.pbase() == 4095);
+    }
+    {
+        std::ifstream bs("overflow.dat");
+        test_buf f(bs.rdbuf());
+        assert(f.sgetc() == L'a');
+    }
+    std::remove("overflow.dat");
+    {
+        std::ofstream bs("overflow.dat");
+        test_buf f(bs.rdbuf());
+        f.pubsetbuf(0, 0);
+        assert(f.pbase() == 0);
+        assert(f.pptr() == 0);
+        assert(f.epptr() == 0);
+        assert(f.overflow('a') == 'a');
+        assert(f.pbase() == 0);
+        assert(f.pptr() == 0);
+        assert(f.epptr() == 0);
+    }
+    {
+        std::ifstream bs("overflow.dat");
+        test_buf f(bs.rdbuf());
+        assert(f.sgetc() == L'a');
+    }
+    std::remove("overflow.dat");
+    {
+        std::ofstream bs("overflow.dat");
+        test_buf f(bs.rdbuf());
+        assert(f.sputc(0x4E51) == 0x4E51);
+        assert(f.sputc(0x4E52) == 0x4E52);
+        assert(f.sputc(0x4E53) == 0x4E53);
+    }
+    {
+        std::ifstream f("overflow.dat");
+        assert(f.is_open());
+        assert(f.get() == 0xE4);
+        assert(f.get() == 0xB9);
+        assert(f.get() == 0x91);
+        assert(f.get() == 0xE4);
+        assert(f.get() == 0xB9);
+        assert(f.get() == 0x92);
+        assert(f.get() == 0xE4);
+        assert(f.get() == 0xB9);
+        assert(f.get() == 0x93);
+        assert(f.get() == -1);
+    }
+    std::remove("overflow.dat");
+}