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PR libstdc++/80064 make heap algorithms work with function types 

PR libstdc++/80064
	* include/bits/stl_heap.h (__is_heap, push_heap, __adjust_heap)
	(pop_heap, make_heap, sort_heap, is_heap_until, is_heap): Cope with
	invalid instantiations using function types for _Compare argument.
	* testsuite/25_algorithms/make_heap/80064.cc: New test.

From-SVN: r246197
This commit is contained in:
Jonathan Wakely 2017-03-16 14:32:07 +00:00 committed by Jonathan Wakely
parent 7acc534977
commit 8d85abab44
3 changed files with 49 additions and 7 deletions
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6
libstdc++-v3/ChangeLog
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@ -1,5 +1,11 @@
2017-03-16 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/80064
* include/bits/stl_heap.h (__is_heap, push_heap, __adjust_heap)
(pop_heap, make_heap, sort_heap, is_heap_until, is_heap): Cope with
invalid instantiations using function types for _Compare argument.
* testsuite/25_algorithms/make_heap/80064.cc: New test.
PR libstdc++/67440
* python/libstdcxx/v6/printers.py (find_type): Avoid gdb.Type.name
for GDB 7.6 compatibility, use gdb.Type.unqualified instead.

19
libstdc++-v3/include/bits/stl_heap.h
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@ -100,7 +100,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
inline bool
__is_heap(_RandomAccessIterator __first, _Compare __comp, _Distance __n)
{
__gnu_cxx::__ops::_Iter_comp_iter<_Compare> __cmp(_GLIBCXX_MOVE(__comp));
typedef __decltype(__comp) _Cmp;
__gnu_cxx::__ops::_Iter_comp_iter<_Cmp> __cmp(_GLIBCXX_MOVE(__comp));
return std::__is_heap_until(__first, __n, __cmp) == __n;
}
@ -313,8 +314,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
if (__last - __first > 1)
{
using __gnu_cxx::__ops::_Iter_comp_iter;
_Iter_comp_iter<_Compare> __cmp(_GLIBCXX_MOVE(__comp));
typedef __decltype(__comp) _Cmp;
__gnu_cxx::__ops::_Iter_comp_iter<_Cmp> __cmp(_GLIBCXX_MOVE(__comp));
--__last;
std::__pop_heap(__first, __last, __last, __cmp);
}
@ -391,7 +392,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
__glibcxx_requires_valid_range(__first, __last);
__glibcxx_requires_irreflexive_pred(__first, __last, __comp);
__gnu_cxx::__ops::_Iter_comp_iter<_Compare> __cmp(_GLIBCXX_MOVE(__comp));
typedef __decltype(__comp) _Cmp;
__gnu_cxx::__ops::_Iter_comp_iter<_Cmp> __cmp(_GLIBCXX_MOVE(__comp));
std::__make_heap(__first, __last, __cmp);
}
@ -454,7 +456,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
__glibcxx_requires_irreflexive_pred(__first, __last, __comp);
__glibcxx_requires_heap_pred(__first, __last, __comp);
__gnu_cxx::__ops::_Iter_comp_iter<_Compare> __cmp(_GLIBCXX_MOVE(__comp));
typedef __decltype(__comp) _Cmp;
__gnu_cxx::__ops::_Iter_comp_iter<_Cmp> __cmp(_GLIBCXX_MOVE(__comp));
std::__sort_heap(__first, __last, __cmp);
}
@ -508,7 +511,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
__glibcxx_requires_valid_range(__first, __last);
__glibcxx_requires_irreflexive_pred(__first, __last, __comp);
__gnu_cxx::__ops::_Iter_comp_iter<_Compare> __cmp(_GLIBCXX_MOVE(__comp));
typedef __decltype(__comp) _Cmp;
__gnu_cxx::__ops::_Iter_comp_iter<_Cmp> __cmp(_GLIBCXX_MOVE(__comp));
return __first
+ std::__is_heap_until(__first, std::distance(__first, __last), __cmp);
}
@ -545,7 +549,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
__glibcxx_requires_irreflexive_pred(__first, __last, __comp);
const auto __dist = std::distance(__first, __last);
__gnu_cxx::__ops::_Iter_comp_iter<_Compare> __cmp(_GLIBCXX_MOVE(__comp));
typedef __decltype(__comp) _Cmp;
__gnu_cxx::__ops::_Iter_comp_iter<_Cmp> __cmp(_GLIBCXX_MOVE(__comp));
return std::__is_heap_until(__first, __dist, __cmp) == __dist;
}
#endif

31
libstdc++-v3/testsuite/25_algorithms/make_heap/80064.cc Normal file
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@ -0,0 +1,31 @@
// Copyright (C) 2017 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/>.
// { dg-do compile }
#include <algorithm>
void
test01(int* first, int* last)
{
extern bool cmp(int, int);
// PR libstdc++/80064
// This is undefined, because [alg.sorting] requires the template argument
// Compare to be a function object type, and bool(int, int) is not an
// object type. We previously accepted it by accident, so keep doing so.
std::make_heap<int*, bool(int, int)>(first, last, cmp);
}