diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index d6339c9f6e9185b5c510c20abe4328daa5466d50..58563cd75b74ae03304a10564ac3d240df0cbfdb 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,15 @@
+2014-11-13 Tim Shen <timshen@google.com>
+
+ PR libstdc++/63775
+ * include/bits/regex_compiler.h (_Compiler<>::_M_expression_term,
+ _BracketMatcher<>::_M_make_range): Throw regex_erorr on invalid range
+ like [z-a]. Change _M_expression_term interface.
+ * include/bits/regex_compiler.tcc (
+ _Compiler<>::_M_insert_bracket_matcher,
+ _Compiler<>::_M_expression_term): Rewrite bracket expression parsing.
+ * testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc:
+ Add testcases and move file out of extended.
+
2014-11-12 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/57250
diff --git a/libstdc++-v3/include/bits/regex_compiler.h b/libstdc++-v3/include/bits/regex_compiler.h
index 1bbc09dd9dcc109347a9ada817c3031b4813211e..d8880cc4794fab62df917fabdf8de07d746c07a2 100644
--- a/libstdc++-v3/include/bits/regex_compiler.h
+++ b/libstdc++-v3/include/bits/regex_compiler.h
@@ -118,7 +118,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<bool __icase, bool __collate>
void
- _M_expression_term(_BracketMatcher<_TraitsT, __icase, __collate>&
+ _M_expression_term(pair<bool, _CharT>& __last_char,
+ _BracketMatcher<_TraitsT, __icase, __collate>&
__matcher);
int
@@ -390,6 +391,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
void
_M_make_range(_CharT __l, _CharT __r)
{
+ if (__l > __r)
+ __throw_regex_error(regex_constants::error_range);
_M_range_set.push_back(make_pair(_M_translator._M_transform(__l),
_M_translator._M_transform(__r)));
#ifdef _GLIBCXX_DEBUG
diff --git a/libstdc++-v3/include/bits/regex_compiler.tcc b/libstdc++-v3/include/bits/regex_compiler.tcc
index 349d92a1200e8c572ba82b647032a967761fc871..f9598843751500ba35038c830c46da106d147481 100644
--- a/libstdc++-v3/include/bits/regex_compiler.tcc
+++ b/libstdc++-v3/include/bits/regex_compiler.tcc
@@ -415,8 +415,17 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_M_insert_bracket_matcher(bool __neg)
{
_BracketMatcher<_TraitsT, __icase, __collate> __matcher(__neg, _M_traits);
+ pair<bool, _CharT> __last_char; // Optional<_CharT>
+ __last_char.first = false;
+ if (!(_M_flags & regex_constants::ECMAScript))
+ if (_M_try_char())
+ {
+ __matcher._M_add_char(_M_value[0]);
+ __last_char.first = true;
+ __last_char.second = _M_value[0];
+ }
while (!_M_match_token(_ScannerT::_S_token_bracket_end))
- _M_expression_term(__matcher);
+ _M_expression_term(__last_char, __matcher);
__matcher._M_ready();
_M_stack.push(_StateSeqT(
*_M_nfa,
@@ -427,7 +436,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<bool __icase, bool __collate>
void
_Compiler<_TraitsT>::
- _M_expression_term(_BracketMatcher<_TraitsT, __icase, __collate>& __matcher)
+ _M_expression_term(pair<bool, _CharT>& __last_char,
+ _BracketMatcher<_TraitsT, __icase, __collate>& __matcher)
{
if (_M_match_token(_ScannerT::_S_token_collsymbol))
__matcher._M_add_collating_element(_M_value);
@@ -435,27 +445,50 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
__matcher._M_add_equivalence_class(_M_value);
else if (_M_match_token(_ScannerT::_S_token_char_class_name))
__matcher._M_add_character_class(_M_value, false);
- else if (_M_try_char()) // [a
+ // POSIX doesn't permit '-' as a start-range char (say [a-z--0]),
+ // except when the '-' is the first character in the bracket expression
+ // ([--0]). ECMAScript treats all '-' after a range as a normal character.
+ // Also see above, where _M_expression_term gets called.
+ //
+ // As a result, POSIX rejects [-----], but ECMAScript doesn't.
+ // Boost (1.57.0) always uses POSIX style even in its ECMAScript syntax.
+ // Clang (3.5) always uses ECMAScript style even in its POSIX syntax.
+ //
+ // It turns out that no one reads BNFs ;)
+ else if (_M_try_char())
{
- auto __ch = _M_value[0];
- if (_M_try_char())
+ if (!__last_char.first)
+ {
+ if (_M_value[0] == '-'
+ && !(_M_flags & regex_constants::ECMAScript))
+ __throw_regex_error(regex_constants::error_range);
+ __matcher._M_add_char(_M_value[0]);
+ __last_char.first = true;
+ __last_char.second = _M_value[0];
+ }
+ else
{
- if (_M_value[0] == '-') // [a-
+ if (_M_value[0] == '-')
{
- if (_M_try_char()) // [a-z]
+ if (_M_try_char())
{
- __matcher._M_make_range(__ch, _M_value[0]);
- return;
+ __matcher._M_make_range(__last_char.second , _M_value[0]);
+ __last_char.first = false;
+ }
+ else
+ {
+ if (_M_scanner._M_get_token()
+ != _ScannerT::_S_token_bracket_end)
+ __throw_regex_error(regex_constants::error_range);
+ __matcher._M_add_char(_M_value[0]);
}
- // If the dash is the last character in the bracket
- // expression, it is not special.
- if (_M_scanner._M_get_token()
- != _ScannerT::_S_token_bracket_end)
- __throw_regex_error(regex_constants::error_range);
}
- __matcher._M_add_char(_M_value[0]);
+ else
+ {
+ __matcher._M_add_char(_M_value[0]);
+ __last_char.second = _M_value[0];
+ }
}
- __matcher._M_add_char(__ch);
}
else if (_M_match_token(_ScannerT::_S_token_quoted_class))
__matcher._M_add_character_class(_M_value,
diff --git a/libstdc++-v3/testsuite/28_regex/algorithms/regex_match/extended/cstring_bracket_01.cc b/libstdc++-v3/testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc
similarity index 69%
rename from libstdc++-v3/testsuite/28_regex/algorithms/regex_match/extended/cstring_bracket_01.cc
rename to libstdc++-v3/testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc
index ca2a5f556fcc14c9a7d14a482613292316b233c8..e5cffc72a2aa794e3b3b2edd04ccb9bd3682bb9b 100644
--- a/libstdc++-v3/testsuite/28_regex/algorithms/regex_match/extended/cstring_bracket_01.cc
+++ b/libstdc++-v3/testsuite/28_regex/algorithms/regex_match/cstring_bracket_01.cc
@@ -67,9 +67,60 @@ test01()
}
}
+void
+test02()
+{
+ bool test __attribute__((unused)) = true;
+
+ try
+ {
+ std::regex re("[-----]", std::regex::extended);
+ VERIFY(false);
+ }
+ catch (const std::regex_error& e)
+ {
+ VERIFY(e.code() == std::regex_constants::error_range);
+ }
+ std::regex re("[-----]", std::regex::ECMAScript);
+}
+
+void
+test03()
+{
+ bool test __attribute__((unused)) = true;
+
+ try
+ {
+ std::regex re("[z-a]", std::regex::extended);
+ VERIFY(false);
+ }
+ catch (const std::regex_error& e)
+ {
+ VERIFY(e.code() == std::regex_constants::error_range);
+ }
+}
+
+void
+test04()
+{
+ bool test __attribute__((unused)) = true;
+
+ std::regex re("[-0-9a-z]");
+ VERIFY(regex_match_debug("-", re));
+ VERIFY(regex_match_debug("1", re));
+ VERIFY(regex_match_debug("w", re));
+ re.assign("[-0-9a-z]", regex_constants::basic);
+ VERIFY(regex_match_debug("-", re));
+ VERIFY(regex_match_debug("1", re));
+ VERIFY(regex_match_debug("w", re));
+}
+
int
main()
{
test01();
+ test02();
+ test03();
+ test04();
return 0;
}