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a8e168e0c1
Variable templates are a bit easier on the compiler and improve the readability of the code.
40 lines
1.7 KiB
C++
40 lines
1.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___VECTOR_CONTAINER_TRAITS_H
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#define _LIBCPP___VECTOR_CONTAINER_TRAITS_H
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#include <__config>
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#include <__fwd/vector.h>
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#include <__memory/allocator_traits.h>
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#include <__type_traits/container_traits.h>
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#include <__type_traits/disjunction.h>
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#include <__type_traits/is_nothrow_constructible.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Tp, class _Allocator>
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struct __container_traits<vector<_Tp, _Allocator> > {
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// http://eel.is/c++draft/vector.modifiers#2
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// If an exception is thrown other than by the copy constructor, move constructor, assignment operator, or move
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// assignment operator of T or by any InputIterator operation, there are no effects. If an exception is thrown while
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// inserting a single element at the end and T is Cpp17CopyInsertable or is_nothrow_move_constructible_v<T> is true,
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// there are no effects. Otherwise, if an exception is thrown by the move constructor of a non-Cpp17CopyInsertable T,
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// the effects are unspecified.
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static _LIBCPP_CONSTEXPR const bool __emplacement_has_strong_exception_safety_guarantee =
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is_nothrow_move_constructible<_Tp>::value || __is_cpp17_copy_insertable_v<_Allocator>;
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};
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___VECTOR_CONTAINER_TRAITS_H
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