re PR libstdc++/83601 (std::regex_replace C++14 conformance issue: escaping in SED mode)

	PR libstdc++/83601
	* include/bits/regex.tcc (regex_replace): Fix escaping in sed.
	* testsuite/28_regex/algorithms/regex_replace/char/pr83601.cc: Tests.
	* testsuite/28_regex/algorithms/regex_replace/wchar_t/pr83601.cc: Tests.

From-SVN: r256654

2 files changed, 70 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/28_regex/algorithms/regex_replace/char/pr83601.cc b/libstdc++-v3/testsuite/28_regex/algorithms/regex_replace/char/pr83601.cc
new file mode 100644
index 0000000..c4bb5d0
--- /dev/null
+++ b/libstdc++-v3/testsuite/28_regex/algorithms/regex_replace/char/pr83601.cc
@@ -0,0 +1,31 @@
+// { dg-do run { target c++11 } }
+
+// Copyright (C) 2018 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 <regex>
+#include <testsuite_hooks.h>
+
+// libstdc++/83601
+int main() {
+    auto format = std::regex_constants::format_sed;
+    auto out = regex_replace("ab", std::regex("(a)(b)"), R"(\\1\&\\2)", format);
+    VERIFY(out == R"(\1&\2)");
+
+    return 0;
+}
diff --git a/libstdc++-v3/testsuite/28_regex/algorithms/regex_replace/wchar_t/pr83601.cc b/libstdc++-v3/testsuite/28_regex/algorithms/regex_replace/wchar_t/pr83601.cc
new file mode 100644
index 0000000..a318e90
--- /dev/null
+++ b/libstdc++-v3/testsuite/28_regex/algorithms/regex_replace/wchar_t/pr83601.cc
@@ -0,0 +1,39 @@
+// { dg-do run { target c++11 } }
+
+// Copyright (C) 2018 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 <regex>
+#include <testsuite_hooks.h>
+
+// libstdc++/83601
+void frep(const wchar_t *istr, const wchar_t *rstr, const wchar_t *ostr) {
+    std::basic_regex<wchar_t> wrgx(L"(a*)(b+)");
+    std::basic_string<wchar_t> wstr = istr, wret = ostr, test;
+    std::regex_replace(std::back_inserter(test), wstr.begin(), wstr.end(),
+                       wrgx, std::basic_string<wchar_t>(rstr),
+                       std::regex_constants::format_sed);
+    VERIFY(test == wret);
+}
+
+int main() {
+    frep(L"xbbyabz", L"!\\\\2!", L"x!\\2!y!\\2!z");
+    frep(L"xbbyabz", L"!\\\\0!", L"x!\\0!y!\\0!z");
+    frep(L"xbbyabz", L"!\\&!", L"x!&!y!&!z");
+    return 0;
+}