From fc88dbd2988365dfa869d7387e1c1a1ae1e5d33d Mon Sep 17 00:00:00 2001
From: Howard Hinnant <hhinnant@apple.com>
Date: Fri, 23 Aug 2013 17:37:05 +0000
Subject: Debug mode for string.  This commit also marks the first time libc++
 debug-mode has found a bug (found one in regex).  Had to play with extern
 templates a bit to get this to work since string is heavily used within
 libc++.dylib.

llvm-svn: 189114
---
 .../basic.string/string.access/db_cfront.pass.cpp  | 50 ++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 libcxx/test/strings/basic.string/string.access/db_cfront.pass.cpp

(limited to 'libcxx/test/strings/basic.string/string.access/db_cfront.pass.cpp')

diff --git a/libcxx/test/strings/basic.string/string.access/db_cfront.pass.cpp b/libcxx/test/strings/basic.string/string.access/db_cfront.pass.cpp
new file mode 100644
index 00000000000..55e90e32e6b
--- /dev/null
+++ b/libcxx/test/strings/basic.string/string.access/db_cfront.pass.cpp
@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <string>
+
+// Call front() on empty const container.
+
+#if _LIBCPP_DEBUG2 >= 1
+
+#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
+
+#include <string>
+#include <cassert>
+#include <iterator>
+#include <exception>
+#include <cstdlib>
+
+#include "../min_allocator.h"
+
+int main()
+{
+    {
+    typedef std::string S;
+    const S s;
+    assert(s.front() == 0);
+    assert(false);
+    }
+#if __cplusplus >= 201103L
+    {
+    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
+    const S s;
+    assert(s.front() == 0);
+    assert(false);
+    }
+#endif
+}
+
+#else
+
+int main()
+{
+}
+
+#endif
-- 
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