78bb1d1571
0172df743 CMakeLists: Only add tests if MASTER_PROJECT 52e8dff62 0.1.11 fc8d745cc container: hmap fixups 5b5c0130d memory: Add overaligned_unique_ptr c7c9bbd17 mcl: Increment version to 0.1.10 678aa32a8 assert: Handle expr strings separately b38a9d2ef tests: Update to Catch 3.0.1 8aeacfe32 mcl: Increment version to 0.1.9 b468a2ab5 mcl: meta_byte: Split off meta_byte_group d3ae1ae47 mcl: ihmap: Implement inline variant of hmap 5cbfe6eed mcl: hmap: Split detail into headers ee7467677 mcl: hmap: Better default hash f1d902ce9 mcl: hash: Add xmrx 322a221f0 mcl: hmap: Bugfix skip_empty_or_tombstone 689f393f7 mcl: hmap: x64 implementation fa6ff746a mcl: hmap: Add generic meta_byte_group implementation 91e3073ad mcl: hmap: Add more member functions 4998335a5 mcl: Install only if master project 7ff4d2549 mcl: hmap prototype 416a2c6b5 mcl: clang-format: Adopt WebKit style bracing d5a46fa70 mcl/assert: Flush stderr e3b6cc79e externals: Update mcl to 0.1.7 190c68475 mcl: Build as PIC git-subtree-dir: externals/mcl git-subtree-split: 0172df74316351868c215f735e5a2538b10d71fb
38 lines
1.5 KiB
C++
38 lines
1.5 KiB
C++
// This file is part of the mcl project.
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// Copyright (c) 2022 merryhime
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// SPDX-License-Identifier: MIT
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#pragma once
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#include <cstring>
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#include <type_traits>
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namespace mcl {
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/// Reinterpret objects of one type as another by bit-casting between object representations.
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template<class Dest, class Source>
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inline Dest bit_cast(const Source& source) noexcept
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{
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static_assert(sizeof(Dest) == sizeof(Source), "size of destination and source objects must be equal");
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static_assert(std::is_trivially_copyable_v<Dest>, "destination type must be trivially copyable.");
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static_assert(std::is_trivially_copyable_v<Source>, "source type must be trivially copyable");
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std::aligned_storage_t<sizeof(Dest), alignof(Dest)> dest;
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std::memcpy(&dest, &source, sizeof(dest));
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return reinterpret_cast<Dest&>(dest);
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}
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/// Reinterpret objects of any arbitrary type as another type by bit-casting between object representations.
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/// Note that here we do not verify if source pointed to by source_ptr has enough bytes to read from.
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template<class Dest, class SourcePtr>
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inline Dest bit_cast_pointee(const SourcePtr source_ptr) noexcept
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{
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static_assert(sizeof(SourcePtr) == sizeof(void*), "source pointer must have size of a pointer");
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static_assert(std::is_trivially_copyable_v<Dest>, "destination type must be trivially copyable.");
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std::aligned_storage_t<sizeof(Dest), alignof(Dest)> dest;
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std::memcpy(&dest, bit_cast<void*>(source_ptr), sizeof(dest));
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return reinterpret_cast<Dest&>(dest);
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}
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} // namespace mcl
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