re PR libstdc++/67362 (std::regex("((.)", std::regex_constants::basic) throws)

	PR libstdc++/67362
	* include/bits/regex_scanner.tcc (_Scanner<>::_M_scan_normal):
	Always returns ordinary char token if the char isn't
	considered a special char.
	* testsuite/28_regex/regression.cc: New test file for collecting
	regression testcases from, typically, bugzilla.

From-SVN: r227289

libstdc++-v3/ChangeLog

+2015-08-28  Tim Shen  <timshen@google.com>
+
+	PR libstdc++/67362
+	* include/bits/regex_scanner.tcc (_Scanner<>::_M_scan_normal):
+	Always returns ordinary char token if the char isn't
+	considered a special char.
+	* testsuite/28_regex/regression.cc: New test file for collecting
+	regression testcases from, typically, bugzilla.
+
 2015-08-27  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/67374

libstdc++-v3/include/bits/regex_scanner.tcc

@@ -99,6 +99,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       auto __c = *_M_current++;
       const char* __pos;
 
+      if (std::strchr(_M_spec_char, _M_ctype.narrow(__c, '\0')) == nullptr)
+	{
+	  _M_token = _S_token_ord_char;
+	  _M_value.assign(1, __c);
+	  return;
+	}
       if (__c == '\\')
 	{
 	  if (_M_current == _M_end)

libstdc++-v3/testsuite/28_regex/regression.cc

+// { dg-options "-std=gnu++11" }
+
+//
+// Copyright (C) 2015 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <testsuite_hooks.h>
+#include <testsuite_regex.h>
+
+using namespace __gnu_test;
+using namespace std;
+
+// PR libstdc++/67362
+void
+test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  regex re("((.)", regex_constants::basic);
+}
+
+int
+main()
+{
+  test01();
+  return 0;
+}
+