basic_string.h (front, back): Add.

2010-05-31  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/bits/basic_string.h (front, back): Add.
	* include/debug/string: Adjust.
	* include/ext/vstring.h (front, back): Tweak the implementation
	to follow more closely the letter of the specs.
	* testsuite/21_strings/basic_string/element_access/char/
	front_back.cc: New.
	* testsuite/21_strings/basic_string/element_access/wchar_t/
	front_back.cc: Likewise.
	* config/abi/pre/gnu.ver: Export new symbols.
	* testsuite/util/testsuite_abi.cc: Adjust.
	* configure.ac: Bump minor version to 6:15:0.
	* configure: Regenerate.

From-SVN: r160071

3 files changed, 89 insertions, 1 deletions

diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/element_access/char/front_back.cc b/libstdc++-v3/testsuite/21_strings/basic_string/element_access/char/front_back.cc
new file mode 100644
index 0000000..a7c1386
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/element_access/char/front_back.cc
@@ -0,0 +1,43 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-require-string-conversions "" }
+
+// 2010-05-31  Paolo Carlini  <paolo.carlini@oracle.com>
+
+// Copyright (C) 2010 Free Software Foundation
+//
+// 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 <string>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::string str("ramifications");
+  const std::string cstr("melodien");
+
+  VERIFY( str.front() == 'r' );
+  VERIFY( str.back() == 's' );
+  VERIFY( cstr.front() == 'm' );
+  VERIFY( cstr.back() == 'n' );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/21_strings/basic_string/element_access/wchar_t/front_back.cc b/libstdc++-v3/testsuite/21_strings/basic_string/element_access/wchar_t/front_back.cc
new file mode 100644
index 0000000..60b0960
--- /dev/null
+++ b/libstdc++-v3/testsuite/21_strings/basic_string/element_access/wchar_t/front_back.cc
@@ -0,0 +1,43 @@
+// { dg-options "-std=gnu++0x" }
+// { dg-require-string-conversions "" }
+
+// 2010-05-31  Paolo Carlini  <paolo.carlini@oracle.com>
+
+// Copyright (C) 2010 Free Software Foundation
+//
+// 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 <string>
+#include <testsuite_hooks.h>
+
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+
+  std::wstring str(L"ramifications");
+  const std::wstring cstr(L"melodien");
+
+  VERIFY( str.front() == L'r' );
+  VERIFY( str.back() == L's' );
+  VERIFY( cstr.front() == L'm' );
+  VERIFY( cstr.back() == L'n' );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/util/testsuite_abi.cc b/libstdc++-v3/testsuite/util/testsuite_abi.cc
index c7166c6..d3c73f6 100644
--- a/libstdc++-v3/testsuite/util/testsuite_abi.cc
+++ b/libstdc++-v3/testsuite/util/testsuite_abi.cc
@@ -1,6 +1,7 @@
 // -*- C++ -*-
 
-// Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+// Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010
+// Free Software Foundation, Inc.
 
 // This library is free software; you can redistribute it and/or
 // modify it under the terms of the GNU General Public License as
@@ -186,6 +187,7 @@ check_version(symbol& test, bool added)
       known_versions.push_back("GLIBCXX_3.4.12");
       known_versions.push_back("GLIBCXX_3.4.13");
       known_versions.push_back("GLIBCXX_3.4.14");
+      known_versions.push_back("GLIBCXX_3.4.15");
       known_versions.push_back("GLIBCXX_LDBL_3.4");
       known_versions.push_back("GLIBCXX_LDBL_3.4.7");
       known_versions.push_back("GLIBCXX_LDBL_3.4.10");