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04b52f65de
I removed all uses of AlignedCharArray since the minimum MSVC version can handle alignas on char arrays correctly. We can therefore remove AlignedCharArray. This patch also updates AlignedCharArrayUnion to use C++11. llvm-svn: 367282
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
//===--- AlignOf.h - Portable calculation of type alignment -----*- 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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//
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// This file defines the AlignedCharArrayUnion class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_ALIGNOF_H
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#define LLVM_SUPPORT_ALIGNOF_H
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#include "llvm/Support/Compiler.h"
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#include <cstddef>
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namespace llvm {
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namespace detail {
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template <typename T, typename... Ts> class AlignerImpl {
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T t;
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AlignerImpl<Ts...> rest;
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AlignerImpl() = delete;
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};
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template <typename T> class AlignerImpl<T> {
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T t;
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AlignerImpl() = delete;
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};
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template <typename T, typename... Ts> union SizerImpl {
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char arr[sizeof(T)];
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SizerImpl<Ts...> rest;
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};
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template <typename T> union SizerImpl<T> { char arr[sizeof(T)]; };
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} // end namespace detail
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/// A suitably aligned and sized character array member which can hold elements
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/// of any type.
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///
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/// These types may be arrays, structs, or any other types. This exposes a
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/// `buffer` member which can be used as suitable storage for a placement new of
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/// any of these types.
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template <typename T, typename... Ts> struct AlignedCharArrayUnion {
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alignas(::llvm::detail::AlignerImpl<T, Ts...>) char buffer[sizeof(
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llvm::detail::SizerImpl<T, Ts...>)];
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};
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} // end namespace llvm
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#endif // LLVM_SUPPORT_ALIGNOF_H
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