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regex.h (regex_iterator::regex_iterator()): Define end() as _M_pregex == nullptr.

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* libstdc++-v3/include/bits/regex.h (regex_iterator::regex_iterator()):
	Define end() as _M_pregex == nullptr.
	* libstdc++-v3/include/bits/regex.tcc (regex_iterator::operator==(),
	regex_iterator::operator++()): Fix operator==() and operator++() to
	look at null-ness of _M_pregex on both sides.
	* testsuite/28_regex/regression.cc: New testcase.

From-SVN: r242025
This commit is contained in:
Tim Shen 2016-11-09 22:11:32 +00:00 committed by Tim Shen
parent 39de19551b
commit 7ce69e5a71
4 changed files with 41 additions and 9 deletions
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9
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,12 @@
2016-11-09 Tim Shen <timshen@google.com>
* libstdc++-v3/include/bits/regex.h (regex_iterator::regex_iterator()):
Define end() as _M_pregex == nullptr.
* libstdc++-v3/include/bits/regex.tcc (regex_iterator::operator==(),
regex_iterator::operator++()): Fix operator==() and operator++() to
look at null-ness of _M_pregex on both sides.
* testsuite/28_regex/regression.cc: New testcase.
2016-11-07 Jason Merrill <jason@redhat.com>
* include/bits/c++config (_GLIBCXX_NOEXCEPT_PARM)

2
libstdc++-v3/include/bits/regex.h
View File

@ -2454,7 +2454,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CXX11
* one-past-the-end of a range.
*/
regex_iterator()
: _M_match()
: _M_pregex()
{ }
/**

17
libstdc++-v3/include/bits/regex.tcc
View File

@ -496,12 +496,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
regex_iterator<_Bi_iter, _Ch_type, _Rx_traits>::
operator==(const regex_iterator& __rhs) const
{
return (_M_match.empty() && __rhs._M_match.empty())
|| (_M_begin == __rhs._M_begin
&& _M_end == __rhs._M_end
&& _M_pregex == __rhs._M_pregex
&& _M_flags == __rhs._M_flags
&& _M_match[0] == __rhs._M_match[0]);
if (_M_pregex == nullptr && __rhs._M_pregex == nullptr)
return true;
return _M_pregex == __rhs._M_pregex
&& _M_begin == __rhs._M_begin
&& _M_end == __rhs._M_end
&& _M_flags == __rhs._M_flags
&& _M_match[0] == __rhs._M_match[0];
}
template<typename _Bi_iter,
@ -525,7 +526,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
if (__start == _M_end)
{
_M_match = value_type();
_M_pregex = nullptr;
return *this;
}
else
@ -558,7 +559,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_M_match._M_begin = _M_begin;
}
else
_M_match = value_type();
_M_pregex = nullptr;
}
return *this;
}

22
libstdc++-v3/testsuite/28_regex/regression.cc
View File

@ -72,6 +72,27 @@ test05()
VERIFY(regex_match_debug("-", std::regex("[a-]")));
}
// PR libstdc++/78236
void
test06()
{
char const s[] = "afoo";
std::basic_regex<char> r("(f+)");
{
std::cregex_iterator i(s, s+sizeof(s), r);
std::cregex_iterator j(s, s+sizeof(s), r);
VERIFY(i == j);
}
// The iterator manipulation code must be repeated in the same scope
// to expose the undefined read during the execution of the ==
// operator (stack location reuse)
{
std::cregex_iterator i(s, s+sizeof(s), r);
std::cregex_iterator j;
VERIFY(!(i == j));
}
}
int
main()
{
@ -80,6 +101,7 @@ main()
test03();
test04();
test05();
test06();
return 0;
}