From 983d17810811cdac0ff475049451f48a6da5cb25 Mon Sep 17 00:00:00 2001
From: Marshall Clow <mclow.lists@gmail.com>
Date: Thu, 23 Jul 2015 18:27:51 +0000
Subject: Detect and throw on a class of bad regexes that we mistakenly
 accepted before. Thanks to Trevor Smigiel for the report

llvm-svn: 243030
---
 .../re.regex.construct/bad_repeat.pass.cpp         | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 libcxx/test/std/re/re.regex/re.regex.construct/bad_repeat.pass.cpp

(limited to 'libcxx/test/std/re/re.regex/re.regex.construct/bad_repeat.pass.cpp')

diff --git a/libcxx/test/std/re/re.regex/re.regex.construct/bad_repeat.pass.cpp b/libcxx/test/std/re/re.regex/re.regex.construct/bad_repeat.pass.cpp
new file mode 100644
index 00000000000..bc70ec1302d
--- /dev/null
+++ b/libcxx/test/std/re/re.regex/re.regex.construct/bad_repeat.pass.cpp
@@ -0,0 +1,42 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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>
+
+// template <class charT, class traits = regex_traits<charT>> class basic_regex;
+
+// template <class ST, class SA>
+//    basic_regex(const basic_string<charT, ST, SA>& s);
+
+#include <regex>
+#include <cassert>
+
+static bool error_badrepeat_thrown(const char *pat) 
+{
+    bool result = false;
+    try {
+        std::regex re(pat);
+    } catch (const std::regex_error &ex) {
+        result = (ex.code() == std::regex_constants::error_badrepeat);
+    }
+    return result;
+}
+
+int main() 
+{
+    assert(error_badrepeat_thrown("?a"));
+    assert(error_badrepeat_thrown("*a"));
+    assert(error_badrepeat_thrown("+a"));
+    assert(error_badrepeat_thrown("{a"));
+
+    assert(error_badrepeat_thrown("?(a+)"));
+    assert(error_badrepeat_thrown("*(a+)"));
+    assert(error_badrepeat_thrown("+(a+)"));
+    assert(error_badrepeat_thrown("{(a+)"));
+}
-- 
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