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Fix for LWG Issue 2369: constexpr max(initializer_list) vs max_element 

llvm-svn: 236952
This commit is contained in:
Marshall Clow 2015-05-10 13:53:31 +00:00
parent d02ce13bd9
commit 0b0671ae36
7 changed files with 107 additions and 33 deletions
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51
libcxx/include/algorithm
View File

@ -521,11 +521,11 @@ template <class RandomAccessIterator, class Compare>
template <class ForwardIterator>
ForwardIterator
min_element(ForwardIterator first, ForwardIterator last);
min_element(ForwardIterator first, ForwardIterator last); // constexpr in C++14
template <class ForwardIterator, class Compare>
ForwardIterator
min_element(ForwardIterator first, ForwardIterator last, Compare comp);
min_element(ForwardIterator first, ForwardIterator last, Compare comp); // constexpr in C++14
template <class T>
const T&
@ -545,11 +545,11 @@ template<class T, class Compare>
template <class ForwardIterator>
ForwardIterator
max_element(ForwardIterator first, ForwardIterator last);
max_element(ForwardIterator first, ForwardIterator last); // constexpr in C++14
template <class ForwardIterator, class Compare>
ForwardIterator
max_element(ForwardIterator first, ForwardIterator last, Compare comp);
max_element(ForwardIterator first, ForwardIterator last, Compare comp); // constexpr in C++14
template <class T>
const T&
@ -569,11 +569,11 @@ template<class T, class Compare>
template<class ForwardIterator>
pair<ForwardIterator, ForwardIterator>
minmax_element(ForwardIterator first, ForwardIterator last);
minmax_element(ForwardIterator first, ForwardIterator last); // constexpr in C++14
template<class ForwardIterator, class Compare>
pair<ForwardIterator, ForwardIterator>
minmax_element(ForwardIterator first, ForwardIterator last, Compare comp);
minmax_element(ForwardIterator first, ForwardIterator last, Compare comp); // constexpr in C++14
template<class T>
pair<const T&, const T&>
@ -2544,7 +2544,7 @@ rotate_copy(_ForwardIterator __first, _ForwardIterator __middle, _ForwardIterato
template <class _ForwardIterator, class _Compare>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_ForwardIterator
__min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
{
if (__first != __last)
{
@ -2556,20 +2556,12 @@ __min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp
return __first;
}
template <class _ForwardIterator, class _Compare>
inline _LIBCPP_INLINE_VISIBILITY
_ForwardIterator
min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
{
return __min_element(__first, __last, __comp);
}
template <class _ForwardIterator>
inline _LIBCPP_INLINE_VISIBILITY
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_ForwardIterator
min_element(_ForwardIterator __first, _ForwardIterator __last)
{
return __min_element(__first, __last,
return _VSTD::min_element(__first, __last,
__less<typename iterator_traits<_ForwardIterator>::value_type>());
}
@ -2598,7 +2590,7 @@ inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_Tp
min(initializer_list<_Tp> __t, _Compare __comp)
{
return *__min_element(__t.begin(), __t.end(), __comp);
return *_VSTD::min_element(__t.begin(), __t.end(), __comp);
}
template<class _Tp>
@ -2606,7 +2598,7 @@ inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_Tp
min(initializer_list<_Tp> __t)
{
return *__min_element(__t.begin(), __t.end(), __less<_Tp>());
return *_VSTD::min_element(__t.begin(), __t.end(), __less<_Tp>());
}
#endif // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
@ -2616,7 +2608,7 @@ min(initializer_list<_Tp> __t)
template <class _ForwardIterator, class _Compare>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_ForwardIterator
__max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
{
if (__first != __last)
{
@ -2629,20 +2621,12 @@ __max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp
}
template <class _ForwardIterator, class _Compare>
inline _LIBCPP_INLINE_VISIBILITY
_ForwardIterator
max_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
{
return __max_element(__first, __last, __comp);
}
template <class _ForwardIterator>
inline _LIBCPP_INLINE_VISIBILITY
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_ForwardIterator
max_element(_ForwardIterator __first, _ForwardIterator __last)
{
return __max_element(__first, __last,
return _VSTD::max_element(__first, __last,
__less<typename iterator_traits<_ForwardIterator>::value_type>());
}
@ -2671,7 +2655,7 @@ inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_Tp
max(initializer_list<_Tp> __t, _Compare __comp)
{
return *__max_element(__t.begin(), __t.end(), __comp);
return *_VSTD::max_element(__t.begin(), __t.end(), __comp);
}
template<class _Tp>
@ -2679,7 +2663,7 @@ inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_Tp
max(initializer_list<_Tp> __t)
{
return *__max_element(__t.begin(), __t.end(), __less<_Tp>());
return *_VSTD::max_element(__t.begin(), __t.end(), __less<_Tp>());
}
#endif // _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
@ -2687,6 +2671,7 @@ max(initializer_list<_Tp> __t)
// minmax_element
template <class _ForwardIterator, class _Compare>
_LIBCPP_CONSTEXPR_AFTER_CXX11
std::pair<_ForwardIterator, _ForwardIterator>
minmax_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
{
@ -2734,7 +2719,7 @@ minmax_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __com
}
template <class _ForwardIterator>
inline _LIBCPP_INLINE_VISIBILITY
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
std::pair<_ForwardIterator, _ForwardIterator>
minmax_element(_ForwardIterator __first, _ForwardIterator __last)
{

14
libcxx/test/std/algorithms/alg.sorting/alg.min.max/max_element.pass.cpp
View File

@ -57,10 +57,24 @@ test()
test<Iter>(1000);
}
#if __cplusplus >= 201402L
constexpr int il[] = { 2, 4, 6, 8, 7, 5, 3, 1 };
#endif
void constexpr_test()
{
#if __cplusplus >= 201402L
constexpr auto p = std::max_element(il,il+8);
static_assert ( *p == 8, "" );
#endif
}
int main()
{
test<forward_iterator<const int*> >();
test<bidirectional_iterator<const int*> >();
test<random_access_iterator<const int*> >();
test<const int*>();
constexpr_test ();
}

15
libcxx/test/std/algorithms/alg.sorting/alg.min.max/max_element_comp.pass.cpp
View File

@ -75,6 +75,19 @@ void test_eq()
delete [] a;
}
#if __cplusplus >= 201402L
constexpr int il[] = { 2, 4, 6, 8, 7, 5, 3, 1 };
struct less { constexpr bool operator ()( const int &x, const int &y) const { return x < y; }};
#endif
void constexpr_test()
{
#if __cplusplus >= 201402L
constexpr auto p = std::max_element(il, il+8, less());
static_assert ( *p == 8, "" );
#endif
}
int main()
{
test<forward_iterator<const int*> >();
@ -82,4 +95,6 @@ int main()
test<random_access_iterator<const int*> >();
test<const int*>();
test_eq();
constexpr_test();
}

14
libcxx/test/std/algorithms/alg.sorting/alg.min.max/min_element.pass.cpp
View File

@ -57,10 +57,24 @@ test()
test<Iter>(1000);
}
#if __cplusplus >= 201402L
constexpr int il[] = { 2, 4, 6, 8, 7, 5, 3, 1 };
#endif
void constexpr_test()
{
#if __cplusplus >= 201402L
constexpr auto p = std::min_element(il, il+8);
static_assert ( *p == 1, "" );
#endif
}
int main()
{
test<forward_iterator<const int*> >();
test<bidirectional_iterator<const int*> >();
test<random_access_iterator<const int*> >();
test<const int*>();
constexpr_test();
}

15
libcxx/test/std/algorithms/alg.sorting/alg.min.max/min_element_comp.pass.cpp
View File

@ -75,6 +75,19 @@ void test_eq()
delete [] a;
}
#if __cplusplus >= 201402L
constexpr int il[] = { 2, 4, 6, 8, 7, 5, 3, 1 };
struct less { constexpr bool operator ()( const int &x, const int &y) const { return x < y; }};
#endif
void constexpr_test()
{
#if __cplusplus >= 201402L
constexpr auto p = std::min_element(il, il+8, less());
static_assert(*p == 1, "");
#endif
}
int main()
{
test<forward_iterator<const int*> >();
@ -82,4 +95,6 @@ int main()
test<random_access_iterator<const int*> >();
test<const int*>();
test_eq();
constexpr_test();
}

15
libcxx/test/std/algorithms/alg.sorting/alg.min.max/minmax_element.pass.cpp
View File

@ -74,10 +74,25 @@ test()
}
}
#if __cplusplus >= 201402L
constexpr int il[] = { 2, 4, 6, 8, 7, 5, 3, 1 };
#endif
void constexpr_test()
{
#if __cplusplus >= 201402L
constexpr auto p = std::minmax_element(il, il+8);
static_assert ( *(p.first) == 1, "" );
static_assert ( *(p.second) == 8, "" );
#endif
}
int main()
{
test<forward_iterator<const int*> >();
test<bidirectional_iterator<const int*> >();
test<random_access_iterator<const int*> >();
test<const int*>();
constexpr_test();
}

16
libcxx/test/std/algorithms/alg.sorting/alg.min.max/minmax_element_comp.pass.cpp
View File

@ -79,10 +79,26 @@ test()
}
}
#if __cplusplus >= 201402L
constexpr int il[] = { 2, 4, 6, 8, 7, 5, 3, 1 };
struct less { constexpr bool operator ()( const int &x, const int &y) const { return x < y; }};
#endif
void constexpr_test()
{
#if __cplusplus >= 201402L
constexpr auto p = std::minmax_element(il, il+8, less());
static_assert ( *(p.first) == 1, "" );
static_assert ( *(p.second) == 8, "" );
#endif
}
int main()
{
test<forward_iterator<const int*> >();
test<bidirectional_iterator<const int*> >();
test<random_access_iterator<const int*> >();
test<const int*>();
constexpr_test();
}