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libstdc++: Add comparison operators to associative containers

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The last C++20 changes from P1614R2, "The Mothership has Landed"

	* include/bits/stl_map.h (map): Define operator<=> and remove
	operator< for C++20.
	* include/bits/stl_multimap.h (multimap): Likewise.
	* include/bits/stl_multiset.h (multiset): Likewise.
	* include/bits/stl_set.h (set): Likewise.
	* include/bits/stl_tree.h (_Rb_tree): Likewise.
	(_Rb_tree_iterator, _Rb_tree_const_iterator): Remove redundant
	operator!= for C++20.
	* include/debug/map.h (__gnu_debug::map): Define operator<=> for C++20.
	* include/debug/multimap.h (__gnu_debug::multimap): Likewise.
	* include/debug/multiset.h (__gnu_debug::multiset): Likewise.
	* include/debug/set.h (__gnu_debug::set): Likewise.
	* testsuite/23_containers/map/operators/cmp_c++20.cc: New test.
	* testsuite/23_containers/multimap/operators/cmp_c++20.cc: New test.
	* testsuite/23_containers/multiset/operators/cmp_c++20.cc: New test.
	* testsuite/23_containers/set/operators/cmp_c++20.cc: New test.
This commit is contained in:
Jonathan Wakely 2020-04-20 17:50:10 +01:00
parent 8e1e6cdb8f
commit 93843da697
14 changed files with 624 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,22 @@
2020-04-20 Jonathan Wakely <jwakely@redhat.com>
* include/bits/stl_map.h (map): Define operator<=> and remove
operator< for C++20.
* include/bits/stl_multimap.h (multimap): Likewise.
* include/bits/stl_multiset.h (multiset): Likewise.
* include/bits/stl_set.h (set): Likewise.
* include/bits/stl_tree.h (_Rb_tree): Likewise.
(_Rb_tree_iterator, _Rb_tree_const_iterator): Remove redundant
operator!= for C++20.
* include/debug/map.h (__gnu_debug::map): Define operator<=> for C++20.
* include/debug/multimap.h (__gnu_debug::multimap): Likewise.
* include/debug/multiset.h (__gnu_debug::multiset): Likewise.
* include/debug/set.h (__gnu_debug::set): Likewise.
* testsuite/23_containers/map/operators/cmp_c++20.cc: New test.
* testsuite/23_containers/multimap/operators/cmp_c++20.cc: New test.
* testsuite/23_containers/multiset/operators/cmp_c++20.cc: New test.
* testsuite/23_containers/set/operators/cmp_c++20.cc: New test.
2020-04-20 Matthias Kretz <kretz@kde.org>
* testsuite/lib/libstdc++.exp: Avoid illegal argument to verbose.

31
libstdc++-v3/include/bits/stl_map.h
View File

@ -1400,10 +1400,17 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
operator==(const map<_K1, _T1, _C1, _A1>&,
const map<_K1, _T1, _C1, _A1>&);
#if __cpp_lib_three_way_comparison
template<typename _K1, typename _T1, typename _C1, typename _A1>
friend __detail::__synth3way_t<pair<const _K1, _T1>>
operator<=>(const map<_K1, _T1, _C1, _A1>&,
const map<_K1, _T1, _C1, _A1>&);
#else
template<typename _K1, typename _T1, typename _C1, typename _A1>
friend bool
operator<(const map<_K1, _T1, _C1, _A1>&,
const map<_K1, _T1, _C1, _A1>&);
#endif
};
@ -1440,7 +1447,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
map(initializer_list<pair<_Key, _Tp>>, _Allocator)
-> map<_Key, _Tp, less<_Key>, _Allocator>;
#endif
#endif // deduction guides
/**
* @brief Map equality comparison.
@ -1458,6 +1465,27 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
const map<_Key, _Tp, _Compare, _Alloc>& __y)
{ return __x._M_t == __y._M_t; }
#if __cpp_lib_three_way_comparison
/**
* @brief Map ordering relation.
* @param __x A `map`.
* @param __y A `map` of the same type as `x`.
* @return A value indicating whether `__x` is less than, equal to,
* greater than, or incomparable with `__y`.
*
* This is a total ordering relation. It is linear in the size of the
* maps. The elements must be comparable with @c <.
*
* See `std::lexicographical_compare_three_way()` for how the determination
* is made. This operator is used to synthesize relational operators like
* `<` and `>=` etc.
*/
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
inline __detail::__synth3way_t<pair<const _Key, _Tp>>
operator<=>(const map<_Key, _Tp, _Compare, _Alloc>& __x,
const map<_Key, _Tp, _Compare, _Alloc>& __y)
{ return __x._M_t <=> __y._M_t; }
#else
/**
* @brief Map ordering relation.
* @param __x A %map.
@ -1502,6 +1530,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
operator>=(const map<_Key, _Tp, _Compare, _Alloc>& __x,
const map<_Key, _Tp, _Compare, _Alloc>& __y)
{ return !(__x < __y); }
#endif // three-way comparison
/// See std::map::swap().
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>

31
libstdc++-v3/include/bits/stl_multimap.h
View File

@ -1065,10 +1065,17 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
operator==(const multimap<_K1, _T1, _C1, _A1>&,
const multimap<_K1, _T1, _C1, _A1>&);
#if __cpp_lib_three_way_comparison
template<typename _K1, typename _T1, typename _C1, typename _A1>
friend __detail::__synth3way_t<pair<const _K1, _T1>>
operator<=>(const multimap<_K1, _T1, _C1, _A1>&,
const multimap<_K1, _T1, _C1, _A1>&);
#else
template<typename _K1, typename _T1, typename _C1, typename _A1>
friend bool
operator<(const multimap<_K1, _T1, _C1, _A1>&,
const multimap<_K1, _T1, _C1, _A1>&);
#endif
};
#if __cpp_deduction_guides >= 201606
@ -1104,7 +1111,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
multimap(initializer_list<pair<_Key, _Tp>>, _Allocator)
-> multimap<_Key, _Tp, less<_Key>, _Allocator>;
#endif
#endif // deduction guides
/**
* @brief Multimap equality comparison.
@ -1122,6 +1129,27 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
{ return __x._M_t == __y._M_t; }
#if __cpp_lib_three_way_comparison
/**
* @brief Multimap ordering relation.
* @param __x A `multimap`.
* @param __y A `multimap` of the same type as `x`.
* @return A value indicating whether `__x` is less than, equal to,
* greater than, or incomparable with `__y`.
*
* This is a total ordering relation. It is linear in the size of the
* maps. The elements must be comparable with @c <.
*
* See `std::lexicographical_compare_three_way()` for how the determination
* is made. This operator is used to synthesize relational operators like
* `<` and `>=` etc.
*/
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
inline __detail::__synth3way_t<pair<const _Key, _Tp>>
operator<=>(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
{ return __x._M_t <=> __y._M_t; }
#else
/**
* @brief Multimap ordering relation.
* @param __x A %multimap.
@ -1166,6 +1194,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
operator>=(const multimap<_Key, _Tp, _Compare, _Alloc>& __x,
const multimap<_Key, _Tp, _Compare, _Alloc>& __y)
{ return !(__x < __y); }
#endif // three-way comparison
/// See std::multimap::swap().
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>

31
libstdc++-v3/include/bits/stl_multiset.h
View File

@ -903,10 +903,17 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
operator==(const multiset<_K1, _C1, _A1>&,
const multiset<_K1, _C1, _A1>&);
#if __cpp_lib_three_way_comparison
template<typename _K1, typename _C1, typename _A1>
friend __detail::__synth3way_t<_K1>
operator<=>(const multiset<_K1, _C1, _A1>&,
const multiset<_K1, _C1, _A1>&);
#else
template<typename _K1, typename _C1, typename _A1>
friend bool
operator< (const multiset<_K1, _C1, _A1>&,
const multiset<_K1, _C1, _A1>&);
#endif
};
#if __cpp_deduction_guides >= 201606
@ -946,7 +953,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
multiset(initializer_list<_Key>, _Allocator)
-> multiset<_Key, less<_Key>, _Allocator>;
#endif
#endif // deduction guides
/**
* @brief Multiset equality comparison.
@ -965,6 +972,27 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
const multiset<_Key, _Compare, _Alloc>& __y)
{ return __x._M_t == __y._M_t; }
#if __cpp_lib_three_way_comparison
/**
* @brief Multiset ordering relation.
* @param __x A `multiset`.
* @param __y A `multiset` of the same type as `x`.
* @return A value indicating whether `__x` is less than, equal to,
* greater than, or incomparable with `__y`.
*
* This is a total ordering relation. It is linear in the size of the
* maps. The elements must be comparable with @c <.
*
* See `std::lexicographical_compare_three_way()` for how the determination
* is made. This operator is used to synthesize relational operators like
* `<` and `>=` etc.
*/
template<typename _Key, typename _Compare, typename _Alloc>
inline __detail::__synth3way_t<_Key>
operator<=>(const multiset<_Key, _Compare, _Alloc>& __x,
const multiset<_Key, _Compare, _Alloc>& __y)
{ return __x._M_t <=> __y._M_t; }
#else
/**
* @brief Multiset ordering relation.
* @param __x A %multiset.
@ -1009,6 +1037,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
operator>=(const multiset<_Key, _Compare, _Alloc>& __x,
const multiset<_Key, _Compare, _Alloc>& __y)
{ return !(__x < __y); }
#endif // three-way comparison
/// See std::multiset::swap().
template<typename _Key, typename _Compare, typename _Alloc>

30
libstdc++-v3/include/bits/stl_set.h
View File

@ -921,9 +921,15 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
friend bool
operator==(const set<_K1, _C1, _A1>&, const set<_K1, _C1, _A1>&);
#if __cpp_lib_three_way_comparison
template<typename _K1, typename _C1, typename _A1>
friend __detail::__synth3way_t<_K1>
operator<=>(const set<_K1, _C1, _A1>&, const set<_K1, _C1, _A1>&);
#else
template<typename _K1, typename _C1, typename _A1>
friend bool
operator<(const set<_K1, _C1, _A1>&, const set<_K1, _C1, _A1>&);
#endif
};
#if __cpp_deduction_guides >= 201606
@ -962,7 +968,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
set(initializer_list<_Key>, _Allocator)
-> set<_Key, less<_Key>, _Allocator>;
#endif
#endif // deduction guides
/**
* @brief Set equality comparison.
@ -980,6 +986,27 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
const set<_Key, _Compare, _Alloc>& __y)
{ return __x._M_t == __y._M_t; }
#if __cpp_lib_three_way_comparison
/**
* @brief Set ordering relation.
* @param __x A `set`.
* @param __y A `set` of the same type as `x`.
* @return A value indicating whether `__x` is less than, equal to,
* greater than, or incomparable with `__y`.
*
* This is a total ordering relation. It is linear in the size of the
* maps. The elements must be comparable with @c <.
*
* See `std::lexicographical_compare_three_way()` for how the determination
* is made. This operator is used to synthesize relational operators like
* `<` and `>=` etc.
*/
template<typename _Key, typename _Compare, typename _Alloc>
inline __detail::__synth3way_t<_Key>
operator<=>(const set<_Key, _Compare, _Alloc>& __x,
const set<_Key, _Compare, _Alloc>& __y)
{ return __x._M_t <=> __y._M_t; }
#else
/**
* @brief Set ordering relation.
* @param __x A %set.
@ -1024,6 +1051,7 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
operator>=(const set<_Key, _Compare, _Alloc>& __x,
const set<_Key, _Compare, _Alloc>& __y)
{ return !(__x < __y); }
#endif // three-way comparison
/// See std::set::swap().
template<typename _Key, typename _Compare, typename _Alloc>

15
libstdc++-v3/include/bits/stl_tree.h
View File

@ -315,9 +315,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
operator==(const _Self& __x, const _Self& __y) _GLIBCXX_NOEXCEPT
{ return __x._M_node == __y._M_node; }
#if ! __cpp_lib_three_way_comparison
friend bool
operator!=(const _Self& __x, const _Self& __y) _GLIBCXX_NOEXCEPT
{ return __x._M_node != __y._M_node; }
#endif
_Base_ptr _M_node;
};
@ -394,9 +396,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
operator==(const _Self& __x, const _Self& __y) _GLIBCXX_NOEXCEPT
{ return __x._M_node == __y._M_node; }
#if ! __cpp_lib_three_way_comparison
friend bool
operator!=(const _Self& __x, const _Self& __y) _GLIBCXX_NOEXCEPT
{ return __x._M_node != __y._M_node; }
#endif
_Base_ptr _M_node;
};
@ -1610,6 +1614,16 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
&& std::equal(__x.begin(), __x.end(), __y.begin());
}
#if __cpp_lib_three_way_comparison
friend auto
operator<=>(const _Rb_tree& __x, const _Rb_tree& __y)
{
if constexpr (requires { typename __detail::__synth3way_t<_Val>; })
return std::lexicographical_compare_three_way(__x.begin(), __x.end(),
__y.begin(), __y.end(),
__detail::__synth3way);
}
#else
friend bool
operator<(const _Rb_tree& __x, const _Rb_tree& __y)
{
@ -1632,6 +1646,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
friend bool _GLIBCXX_DEPRECATED
operator>=(const _Rb_tree& __x, const _Rb_tree& __y)
{ return !(__x < __y); }
#endif
};
template<typename _Key, typename _Val, typename _KeyOfValue,

10
libstdc++-v3/include/debug/map.h
View File

@ -731,7 +731,7 @@ namespace __debug
map(initializer_list<pair<_Key, _Tp>>, _Allocator)
-> map<_Key, _Tp, less<_Key>, _Allocator>;
#endif
#endif // deduction guides
template<typename _Key, typename _Tp,
typename _Compare, typename _Allocator>
@ -740,6 +740,13 @@ namespace __debug
const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
{ return __lhs._M_base() == __rhs._M_base(); }
#if __cpp_lib_three_way_comparison
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
inline __detail::__synth3way_t<pair<const _Key, _Tp>>
operator<=>(const map<_Key, _Tp, _Compare, _Alloc>& __lhs,
const map<_Key, _Tp, _Compare, _Alloc>& __rhs)
{ return __lhs._M_base() <=> __rhs._M_base(); }
#else
template<typename _Key, typename _Tp,
typename _Compare, typename _Allocator>
inline bool
@ -774,6 +781,7 @@ namespace __debug
operator>(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
{ return __lhs._M_base() > __rhs._M_base(); }
#endif // three-way comparison
template<typename _Key, typename _Tp,
typename _Compare, typename _Allocator>

8
libstdc++-v3/include/debug/multimap.h
View File

@ -621,6 +621,13 @@ namespace __debug
const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs)
{ return __lhs._M_base() == __rhs._M_base(); }
#if __cpp_lib_three_way_comparison
template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
inline __detail::__synth3way_t<pair<const _Key, _Tp>>
operator<=>(const multimap<_Key, _Tp, _Compare, _Alloc>& __lhs,
const multimap<_Key, _Tp, _Compare, _Alloc>& __rhs)
{ return __lhs._M_base() <=> __rhs._M_base(); }
#else
template<typename _Key, typename _Tp,
typename _Compare, typename _Allocator>
inline bool
@ -655,6 +662,7 @@ namespace __debug
operator>(const multimap<_Key, _Tp, _Compare, _Allocator>& __lhs,
const multimap<_Key, _Tp, _Compare, _Allocator>& __rhs)
{ return __lhs._M_base() > __rhs._M_base(); }
#endif // three-way comparison
template<typename _Key, typename _Tp,
typename _Compare, typename _Allocator>

10
libstdc++-v3/include/debug/multiset.h
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@ -584,7 +584,7 @@ namespace __debug
multiset(initializer_list<_Key>, _Allocator)
-> multiset<_Key, less<_Key>, _Allocator>;
#endif
#endif // deduction guides
template<typename _Key, typename _Compare, typename _Allocator>
inline bool
@ -592,6 +592,13 @@ namespace __debug
const multiset<_Key, _Compare, _Allocator>& __rhs)
{ return __lhs._M_base() == __rhs._M_base(); }
#if __cpp_lib_three_way_comparison
template<typename _Key, typename _Compare, typename _Alloc>
inline __detail::__synth3way_t<_Key>
operator<=>(const multiset<_Key, _Compare, _Alloc>& __lhs,
const multiset<_Key, _Compare, _Alloc>& __rhs)
{ return __lhs._M_base() <=> __rhs._M_base(); }
#else
template<typename _Key, typename _Compare, typename _Allocator>
inline bool
operator!=(const multiset<_Key, _Compare, _Allocator>& __lhs,
@ -621,6 +628,7 @@ namespace __debug
operator>(const multiset<_Key, _Compare, _Allocator>& __lhs,
const multiset<_Key, _Compare, _Allocator>& __rhs)
{ return __lhs._M_base() > __rhs._M_base(); }
#endif // three-way comparison
template<typename _Key, typename _Compare, typename _Allocator>
void

10
libstdc++-v3/include/debug/set.h
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@ -595,7 +595,7 @@ namespace __debug
set(initializer_list<_Key>, _Allocator)
-> set<_Key, less<_Key>, _Allocator>;
#endif
#endif // deduction guides
template<typename _Key, typename _Compare, typename _Allocator>
inline bool
@ -603,6 +603,13 @@ namespace __debug
const set<_Key, _Compare, _Allocator>& __rhs)
{ return __lhs._M_base() == __rhs._M_base(); }
#if __cpp_lib_three_way_comparison
template<typename _Key, typename _Compare, typename _Alloc>
inline __detail::__synth3way_t<_Key>
operator<=>(const set<_Key, _Compare, _Alloc>& __lhs,
const set<_Key, _Compare, _Alloc>& __rhs)
{ return __lhs._M_base() <=> __rhs._M_base(); }
#else
template<typename _Key, typename _Compare, typename _Allocator>
inline bool
operator!=(const set<_Key, _Compare, _Allocator>& __lhs,
@ -632,6 +639,7 @@ namespace __debug
operator>(const set<_Key, _Compare, _Allocator>& __lhs,
const set<_Key, _Compare, _Allocator>& __rhs)
{ return __lhs._M_base() > __rhs._M_base(); }
#endif // three-way comparison
template<typename _Key, typename _Compare, typename _Allocator>
void

111
libstdc++-v3/testsuite/23_containers/map/operators/cmp_c++20.cc Normal file
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@ -0,0 +1,111 @@
// Copyright (C) 2020 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-options "-std=gnu++2a" }
// { dg-do run { target c++2a } }
#include <map>
#include <testsuite_hooks.h>
void
test01()
{
std::map<int, int> c1{ {1,1}, {2,1}, {3,1} };
std::map<int, int> c2{ {1,1}, {2,1}, {3,1}, {4,1} };
std::map<int, int> c3{ {1,1}, {2,1}, {3,2} };
VERIFY( c1 == c1 );
VERIFY( std::is_eq(c1 <=> c1) );
VERIFY( c1 < c2 );
VERIFY( std::is_lt(c1 <=> c2) );
VERIFY( c1 < c3 );
VERIFY( std::is_lt(c1 <=> c3) );
VERIFY( c2 < c3 );
VERIFY( std::is_lt(c2 <=> c3) );
static_assert( std::totally_ordered<std::map<int, int>> );
static_assert( std::three_way_comparable<std::map<int, int>,
std::strong_ordering> );
static_assert( ! std::three_way_comparable<std::map<int, float>,
std::strong_ordering> );
static_assert( ! std::three_way_comparable<std::map<int, float>,
std::weak_ordering> );
static_assert( std::three_way_comparable<std::map<int, float>,
std::partial_ordering> );
struct E
{
bool operator==(E) { return true; }
};
static_assert( ! std::totally_ordered<std::map<int, E>> );
static_assert( ! std::three_way_comparable<E> );
static_assert( ! std::three_way_comparable<std::map<int, E>> );
}
void
test02()
{
struct W
{
int value = 0;
bool operator==(W rhs) const noexcept
{ return (value | 1) == (rhs.value | 1); }
std::weak_ordering
operator<=>(W rhs) const noexcept
{ return (value | 1) <=> (rhs.value | 1); }
};
static_assert( std::totally_ordered<std::map<int, W>> );
using P = std::pair<const W, W>;
std::map<W, W> c1{ P{1,1}, P{2,2}, P{3,3} }, c2{ P{1,0}, P{3,2}, P{3,3} };
static_assert( std::same_as<decltype(c1 <=> c1), std::weak_ordering> );
VERIFY( c1 == c2 );
VERIFY( std::is_eq(c1 <=> c2) );
}
void
test04()
{
struct L
{
int value = 0;
bool operator<(L rhs) const noexcept { return value < rhs.value; }
};
static_assert( std::totally_ordered<std::map<int, L>> );
using P = std::pair<const L, L>;
std::map<L, L> c{ P{1,1}, P{2,2}, P{3,3} }, d{ P{1,1}, P{2,2}, P{3,4} };
static_assert( std::same_as<decltype(c <=> c), std::weak_ordering> );
VERIFY( std::is_lt(c <=> d) );
}
// Associative container iterators are not random access
static_assert( ! std::totally_ordered<std::map<int, int>::iterator> );
static_assert( ! std::three_way_comparable<std::map<int, int>::iterator> );
int
main()
{
test01();
test02();
test04();
}

111
libstdc++-v3/testsuite/23_containers/multimap/operators/cmp_c++20.cc Normal file
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@ -0,0 +1,111 @@
// Copyright (C) 2020 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-options "-std=gnu++2a" }
// { dg-do run { target c++2a } }
#include <map>
#include <testsuite_hooks.h>
void
test01()
{
std::multimap<int, int> c1{ {1,1}, {2,1}, {3,1} };
std::multimap<int, int> c2{ {1,1}, {2,1}, {3,1}, {4,1} };
std::multimap<int, int> c3{ {1,1}, {2,1}, {3,2} };
VERIFY( c1 == c1 );
VERIFY( std::is_eq(c1 <=> c1) );
VERIFY( c1 < c2 );
VERIFY( std::is_lt(c1 <=> c2) );
VERIFY( c1 < c3 );
VERIFY( std::is_lt(c1 <=> c3) );
VERIFY( c2 < c3 );
VERIFY( std::is_lt(c2 <=> c3) );
static_assert( std::totally_ordered<std::multimap<int, int>> );
static_assert( std::three_way_comparable<std::multimap<int, int>,
std::strong_ordering> );
static_assert( ! std::three_way_comparable<std::multimap<int, float>,
std::strong_ordering> );
static_assert( ! std::three_way_comparable<std::multimap<int, float>,
std::weak_ordering> );
static_assert( std::three_way_comparable<std::multimap<int, float>,
std::partial_ordering> );
struct E
{
bool operator==(E) { return true; }
};
static_assert( ! std::totally_ordered<std::multimap<int, E>> );
static_assert( ! std::three_way_comparable<E> );
static_assert( ! std::three_way_comparable<std::multimap<int, E>> );
}
void
test02()
{
struct W
{
int value = 0;
bool operator==(W rhs) const noexcept
{ return (value | 1) == (rhs.value | 1); }
std::weak_ordering
operator<=>(W rhs) const noexcept
{ return (value | 1) <=> (rhs.value | 1); }
};
static_assert( std::totally_ordered<std::multimap<int, W>> );
using P = std::pair<const W, W>;
std::multimap<W, W> c1{ P{1,1}, P{2,2}, P{3,3} }, c2{ P{1,0}, P{3,2}, P{3,3} };
static_assert( std::same_as<decltype(c1 <=> c1), std::weak_ordering> );
VERIFY( c1 == c2 );
VERIFY( std::is_eq(c1 <=> c2) );
}
void
test04()
{
struct L
{
int value = 0;
bool operator<(L rhs) const noexcept { return value < rhs.value; }
};
static_assert( std::totally_ordered<std::multimap<int, L>> );
using P = std::pair<const L, L>;
std::multimap<L, L> c{ P{1,1}, P{2,2}, P{3,3} }, d{ P{1,1}, P{2,2}, P{3,4} };
static_assert( std::same_as<decltype(c <=> c), std::weak_ordering> );
VERIFY( std::is_lt(c <=> d) );
}
// Associative container iterators are not random access
static_assert( ! std::totally_ordered<std::multimap<int, int>::iterator> );
static_assert( ! std::three_way_comparable<std::multimap<int, int>::iterator> );
int
main()
{
test01();
test02();
test04();
}

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// Copyright (C) 2020 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-options "-std=gnu++2a" }
// { dg-do run { target c++2a } }
#include <set>
#include <testsuite_hooks.h>
void
test01()
{
std::multiset<int> c1{ 1, 2, 3 }, c2{ 1, 2, 3, 4 }, c3{ 1, 2, 4 };
VERIFY( c1 == c1 );
VERIFY( std::is_eq(c1 <=> c1) );
VERIFY( c1 < c2 );
VERIFY( std::is_lt(c1 <=> c2) );
VERIFY( c1 < c3 );
VERIFY( std::is_lt(c1 <=> c3) );
VERIFY( c2 < c3 );
VERIFY( std::is_lt(c2 <=> c3) );
static_assert( std::totally_ordered<std::multiset<int>> );
static_assert( std::three_way_comparable<std::multiset<int>,
std::strong_ordering> );
static_assert( ! std::three_way_comparable<std::multiset<float>,
std::strong_ordering> );
static_assert( ! std::three_way_comparable<std::multiset<float>,
std::weak_ordering> );
static_assert( std::three_way_comparable<std::multiset<float>,
std::partial_ordering> );
struct E
{
bool operator==(E) { return true; }
};
static_assert( ! std::totally_ordered<std::multiset<E>> );
static_assert( ! std::three_way_comparable<E> );
static_assert( ! std::three_way_comparable<std::multiset<E>> );
}
void
test02()
{
struct W
{
int value = 0;
bool operator==(W rhs) const noexcept
{ return (value | 1) == (rhs.value | 1); }
std::weak_ordering
operator<=>(W rhs) const noexcept
{ return (value | 1) <=> (rhs.value | 1); }
};
static_assert( std::totally_ordered<std::multiset<W>> );
std::multiset<W> c1{ {1}, {2}, {3} }, c2{ {0}, {3}, {3} };
static_assert( std::same_as<decltype(c1 <=> c1), std::weak_ordering> );
VERIFY( c1 == c2 );
VERIFY( std::is_eq(c1 <=> c2) );
}
void
test04()
{
struct L
{
int value = 0;
bool operator<(L rhs) const noexcept { return value < rhs.value; }
};
static_assert( std::totally_ordered<std::multiset<L>> );
std::multiset<L> c{ {1}, {2}, {3} }, d{ {1}, {2}, {3}, {4} };
static_assert( std::same_as<decltype(c <=> c), std::weak_ordering> );
VERIFY( std::is_lt(c <=> d) );
}
// Associative container iterators are not random access
static_assert( ! std::totally_ordered<std::multiset<int>::iterator> );
static_assert( ! std::three_way_comparable<std::multiset<int>::iterator> );
int
main()
{
test01();
test02();
test04();
}

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// Copyright (C) 2020 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-options "-std=gnu++2a" }
// { dg-do run { target c++2a } }
#include <set>
#include <testsuite_hooks.h>
void
test01()
{
std::set<int> c1{ 1, 2, 3 }, c2{ 1, 2, 3, 4 }, c3{ 1, 2, 4 };
VERIFY( c1 == c1 );
VERIFY( std::is_eq(c1 <=> c1) );
VERIFY( c1 < c2 );
VERIFY( std::is_lt(c1 <=> c2) );
VERIFY( c1 < c3 );
VERIFY( std::is_lt(c1 <=> c3) );
VERIFY( c2 < c3 );
VERIFY( std::is_lt(c2 <=> c3) );
static_assert( std::totally_ordered<std::set<int>> );
static_assert( std::three_way_comparable<std::set<int>,
std::strong_ordering> );
static_assert( ! std::three_way_comparable<std::set<float>,
std::strong_ordering> );
static_assert( ! std::three_way_comparable<std::set<float>,
std::weak_ordering> );
static_assert( std::three_way_comparable<std::set<float>,
std::partial_ordering> );
struct E
{
bool operator==(E) { return true; }
};
static_assert( ! std::totally_ordered<std::set<E>> );
static_assert( ! std::three_way_comparable<E> );
static_assert( ! std::three_way_comparable<std::set<E>> );
}
void
test02()
{
struct W
{
int value = 0;
bool operator==(W rhs) const noexcept
{ return (value | 1) == (rhs.value | 1); }
std::weak_ordering
operator<=>(W rhs) const noexcept
{ return (value | 1) <=> (rhs.value | 1); }
};
static_assert( std::totally_ordered<std::set<W>> );
std::set<W> c1{ {1}, {2}, {3} }, c2{ {0}, {3}, {3} };
static_assert( std::same_as<decltype(c1 <=> c1), std::weak_ordering> );
VERIFY( c1 == c2 );
VERIFY( std::is_eq(c1 <=> c2) );
}
void
test04()
{
struct L
{
int value = 0;
bool operator<(L rhs) const noexcept { return value < rhs.value; }
};
static_assert( std::totally_ordered<std::set<L>> );
std::set<L> c{ {1}, {2}, {3} }, d{ {1}, {2}, {3}, {4} };
static_assert( std::same_as<decltype(c <=> c), std::weak_ordering> );
VERIFY( std::is_lt(c <=> d) );
}
// Associative container iterators are not random access
static_assert( ! std::totally_ordered<std::set<int>::iterator> );
static_assert( ! std::three_way_comparable<std::set<int>::iterator> );
int
main()
{
test01();
test02();
test04();
}