Vendor import of libc++ trunk r321017:vendor/libc++/libc++-trunk-r321017

https://llvm.org/svn/llvm-project/libcxx/trunk@321017

1 files changed, 27 insertions, 0 deletions

diff --git a/test/std/re/re.results/re.results.size/empty.fail.cpp b/test/std/re/re.results/re.results.size/empty.fail.cpp
new file mode 100644
index 000000000000..6f677f3907ab
--- /dev/null
+++ b/test/std/re/re.results/re.results.size/empty.fail.cpp
@@ -0,0 +1,27 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <regex>
+
+// class match_results<BidirectionalIterator, Allocator>
+// bool empty() const;
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
+// UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8
+
+#include <regex>
+
+#include "test_macros.h"
+
+int main ()
+{
+    std::match_results<const char*> c;
+    c.empty();  // expected-error {{ignoring return value of function declared with 'nodiscard' attribute}}
+}