forked from OSchip/llvm-project
Deduction guides for the container adaptors - queue, stack, and priority_queue
llvm-svn: 332927
This commit is contained in:
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@ -69,6 +69,12 @@ public:
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void swap(queue& q) noexcept(is_nothrow_swappable_v<Container>)
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};
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template<class Container>
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queue(Container) -> queue<typename Container::value_type, Container>; // C++17
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template<class Container, class Allocator>
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queue(Container, Allocator) -> queue<typename Container::value_type, Container>; // C++17
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template <class T, class Container>
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bool operator==(const queue<T, Container>& x,const queue<T, Container>& y);
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@ -157,6 +163,20 @@ public:
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is_nothrow_swappable_v<Comp>)
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};
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template <class Compare, class Container>
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priority_queue(Compare, Container)
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-> priority_queue<typename Container::value_type, Container, Compare>; // C++17
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template<class InputIterator,
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class Compare = less<typename iterator_traits<InputIterator>::value_type>,
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class Container = vector<typename iterator_traits<InputIterator>::value_type>>
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priority_queue(InputIterator, InputIterator, Compare = Compare(), Container = Container())
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-> priority_queue<typename iterator_traits<InputIterator>::value_type, Container, Compare>; // C++17
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template<class Compare, class Container, class Allocator>
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priority_queue(Compare, Container, Allocator)
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-> priority_queue<typename Container::value_type, Container, Compare>; // C++17
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template <class T, class Container, class Compare>
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void swap(priority_queue<T, Container, Compare>& x,
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priority_queue<T, Container, Compare>& y)
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@ -321,6 +341,22 @@ public:
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operator< (const queue<_T1, _C1>& __x,const queue<_T1, _C1>& __y);
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};
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#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES
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template<class _Container,
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class = typename enable_if<!__is_allocator<_Container>::value, nullptr_t>::type
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>
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queue(_Container)
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-> queue<typename _Container::value_type, _Container>;
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template<class _Container,
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class _Alloc,
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class = typename enable_if<!__is_allocator<_Container>::value, nullptr_t>::type,
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class = typename enable_if< __is_allocator<_Alloc>::value, nullptr_t>::type
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>
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queue(_Container, _Alloc)
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-> queue<typename _Container::value_type, _Container>;
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#endif
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template <class _Tp, class _Container>
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inline _LIBCPP_INLINE_VISIBILITY
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bool
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@ -515,6 +551,36 @@ public:
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__is_nothrow_swappable<value_compare>::value);
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};
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#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES
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template <class _Compare,
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class _Container,
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class = typename enable_if<!__is_allocator<_Compare>::value, nullptr_t>::type,
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class = typename enable_if<!__is_allocator<_Container>::value, nullptr_t>::type
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>
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priority_queue(_Compare, _Container)
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-> priority_queue<typename _Container::value_type, _Container, _Compare>;
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template<class _InputIterator,
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class _Compare = less<typename iterator_traits<_InputIterator>::value_type>,
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class _Container = vector<typename iterator_traits<_InputIterator>::value_type>,
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class = typename enable_if< __is_input_iterator<_InputIterator>::value, nullptr_t>::type,
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class = typename enable_if<!__is_allocator<_Compare>::value, nullptr_t>::type,
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class = typename enable_if<!__is_allocator<_Container>::value, nullptr_t>::type
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>
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priority_queue(_InputIterator, _InputIterator, _Compare = _Compare(), _Container = _Container())
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-> priority_queue<typename iterator_traits<_InputIterator>::value_type, _Container, _Compare>;
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template<class _Compare,
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class _Container,
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class _Alloc,
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class = typename enable_if<!__is_allocator<_Compare>::value, nullptr_t>::type,
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class = typename enable_if<!__is_allocator<_Container>::value, nullptr_t>::type,
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class = typename enable_if< __is_allocator<_Alloc>::value, nullptr_t>::type
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>
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priority_queue(_Compare, _Container, _Alloc)
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-> priority_queue<typename _Container::value_type, _Container, _Compare>;
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#endif
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template <class _Tp, class _Container, class _Compare>
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inline
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priority_queue<_Tp, _Container, _Compare>::priority_queue(const _Compare& __comp,
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@ -61,6 +61,12 @@ public:
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void swap(stack& c) noexcept(is_nothrow_swappable_v<Container>)
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};
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template<class Container>
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stack(Container) -> stack<typename Container::value_type, Container>; // C++17
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template<class Container, class Allocator>
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stack(Container, Allocator) -> stack<typename Container::value_type, Container>; // C++17
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template <class T, class Container>
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bool operator==(const stack<T, Container>& x, const stack<T, Container>& y);
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template <class T, class Container>
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@ -229,6 +235,22 @@ public:
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operator< (const stack<T1, _C1>& __x, const stack<T1, _C1>& __y);
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};
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#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES
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template<class _Container,
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class = typename enable_if<!__is_allocator<_Container>::value, nullptr_t>::type
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>
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stack(_Container)
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-> stack<typename _Container::value_type, _Container>;
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template<class _Container,
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class _Alloc,
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class = typename enable_if<!__is_allocator<_Container>::value, nullptr_t>::type,
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class = typename enable_if< __is_allocator<_Alloc>::value, nullptr_t>::type
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>
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stack(_Container, _Alloc)
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-> stack<typename _Container::value_type, _Container>;
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#endif
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template <class _Tp, class _Container>
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inline _LIBCPP_INLINE_VISIBILITY
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bool
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@ -0,0 +1,46 @@
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <queue>
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// UNSUPPORTED: libcpp-no-deduction-guides
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#include <queue>
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#include <list>
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#include <iterator>
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#include <cassert>
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#include <cstddef>
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int main()
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{
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// Test the explicit deduction guides
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{
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// queue(const Container&, const Alloc&);
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// The '45' is not an allocator
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std::queue que(std::list<int>{1,2,3}, 45); // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'queue'}}
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}
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{
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// queue(const queue&, const Alloc&);
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// The '45' is not an allocator
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std::queue<int> source;
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std::queue que(source, 45); // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'queue'}}
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}
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// Test the implicit deduction guides
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{
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// queue (allocator &)
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std::queue que((std::allocator<int>())); // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'queue'}}
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// Note: The extra parens are necessary, since otherwise clang decides it is a function declaration.
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// Also, we can't use {} instead of parens, because that constructs a
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// stack<allocator<int>, allocator<allocator<int>>>
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}
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}
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@ -0,0 +1,89 @@
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <queue>
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// UNSUPPORTED: libcpp-no-deduction-guides
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// template<class Container>
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// queue(Container) -> queue<typename Container::value_type, Container>;
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//
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// template<class Container, class Allocator>
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// queue(Container, Allocator) -> queue<typename Container::value_type, Container>;
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#include <queue>
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#include <list>
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#include <iterator>
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#include <cassert>
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#include <cstddef>
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#include <climits> // INT_MAX
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#include "test_macros.h"
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#include "test_iterators.h"
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#include "test_allocator.h"
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struct A {};
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int main()
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{
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// Test the explicit deduction guides
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{
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std::list<int> l{0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
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std::queue que(l);
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static_assert(std::is_same_v<decltype(que), std::queue<int, std::list<int>>>, "");
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assert(que.size() == l.size());
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assert(que.back() == l.back());
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}
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{
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std::list<long, test_allocator<long>> l{10, 11, 12, 13, 14, 15, 16, 17, 18, 19 };
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std::queue que(l, test_allocator<long>(0,2)); // different allocator
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static_assert(std::is_same_v<decltype(que)::container_type, std::list<long, test_allocator<long>>>, "");
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static_assert(std::is_same_v<decltype(que)::value_type, long>, "");
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assert(que.size() == 10);
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assert(que.back() == 19);
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// I'd like to assert that we've gotten the right allocator in the queue, but
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// I don't know how to get at the underlying container.
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}
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// Test the implicit deduction guides
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{
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// We don't expect this one to work - no way to implicitly get value_type
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// std::queue que(std::allocator<int>()); // queue (allocator &)
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}
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{
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std::queue<A> source;
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std::queue que(source); // queue(queue &)
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static_assert(std::is_same_v<decltype(que)::value_type, A>, "");
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static_assert(std::is_same_v<decltype(que)::container_type, std::deque<A>>, "");
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assert(que.size() == 0);
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}
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{
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// This one is odd - you can pass an allocator in to use, but the allocator
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// has to match the type of the one used by the underlying container
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typedef short T;
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typedef test_allocator<T> A;
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typedef std::deque<T, A> C;
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C c{0,1,2,3};
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std::queue<T, C> source(c);
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std::queue que(source, A(2)); // queue(queue &, allocator)
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static_assert(std::is_same_v<decltype(que)::value_type, T>, "");
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static_assert(std::is_same_v<decltype(que)::container_type, C>, "");
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assert(que.size() == 4);
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assert(que.back() == 3);
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}
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}
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@ -0,0 +1,53 @@
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <stack>
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// UNSUPPORTED: libcpp-no-deduction-guides
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// template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
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// vector(InputIterator, InputIterator, Allocator = Allocator())
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// -> vector<typename iterator_traits<InputIterator>::value_type, Allocator>;
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//
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#include <stack>
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#include <list>
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#include <iterator>
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#include <cassert>
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#include <cstddef>
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int main()
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{
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// Test the explicit deduction guides
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{
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// stack(const Container&, const Alloc&);
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// The '45' is not an allocator
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std::stack stk(std::list<int>({1,2,3}), 45); // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'stack'}}
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}
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{
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// stack(const stack&, const Alloc&);
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// The '45' is not an allocator
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std::stack<int> source;
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std::stack stk(source, 45); // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'stack'}}
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}
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// Test the implicit deduction guides
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{
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// stack (allocator &)
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std::stack stk((std::allocator<int>())); // expected-error {{no viable constructor or deduction guide for deduction of template arguments of 'stack'}}
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// Note: The extra parens are necessary, since otherwise clang decides it is a function declaration.
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// Also, we can't use {} instead of parens, because that constructs a
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// stack<allocator<int>, allocator<allocator<int>>>
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}
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}
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@ -0,0 +1,91 @@
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <stack>
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// UNSUPPORTED: libcpp-no-deduction-guides
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// template<class Container>
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// stack(Container) -> stack<typename Container::value_type, Container>;
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//
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// template<class Container, class Allocator>
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// stack(Container, Allocator) -> stack<typename Container::value_type, Container>;
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#include <stack>
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#include <vector>
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#include <list>
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#include <iterator>
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#include <cassert>
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#include <cstddef>
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#include <climits> // INT_MAX
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#include "test_macros.h"
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#include "test_iterators.h"
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#include "test_allocator.h"
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struct A {};
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int main()
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{
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// Test the explicit deduction guides
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{
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std::vector<int> v{0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
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std::stack stk(v);
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static_assert(std::is_same_v<decltype(stk), std::stack<int, std::vector<int>>>, "");
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assert(stk.size() == v.size());
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assert(stk.top() == v.back());
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}
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{
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std::list<long, test_allocator<long>> l{10, 11, 12, 13, 14, 15, 16, 17, 18, 19 };
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std::stack stk(l, test_allocator<long>(0,2)); // different allocator
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static_assert(std::is_same_v<decltype(stk)::container_type, std::list<long, test_allocator<long>>>, "");
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static_assert(std::is_same_v<decltype(stk)::value_type, long>, "");
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assert(stk.size() == 10);
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assert(stk.top() == 19);
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// I'd like to assert that we've gotten the right allocator in the stack, but
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// I don't know how to get at the underlying container.
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}
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// Test the implicit deduction guides
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{
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// We don't expect this one to work - no way to implicitly get value_type
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// std::stack stk(std::allocator<int>()); // stack (allocator &)
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}
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{
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std::stack<A> source;
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std::stack stk(source); // stack(stack &)
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static_assert(std::is_same_v<decltype(stk)::value_type, A>, "");
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static_assert(std::is_same_v<decltype(stk)::container_type, std::deque<A>>, "");
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assert(stk.size() == 0);
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}
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{
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// This one is odd - you can pass an allocator in to use, but the allocator
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// has to match the type of the one used by the underlying container
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typedef short T;
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typedef test_allocator<T> A;
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typedef std::deque<T, A> C;
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C c{0,1,2,3};
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std::stack<T, C> source(c);
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std::stack stk(source, A(2)); // stack(stack &, allocator)
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static_assert(std::is_same_v<decltype(stk)::value_type, T>, "");
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static_assert(std::is_same_v<decltype(stk)::container_type, C>, "");
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assert(stk.size() == 4);
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assert(stk.top() == 3);
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}
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}
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