300 lines
9.4 KiB
C++
300 lines
9.4 KiB
C++
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/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2021 John Wellbelove
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#include "unit_test_framework.h"
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#include "etl/mem_cast.h"
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#include "etl/largest.h"
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#include <array>
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#include <vector>
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#include <algorithm>
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#include <string>
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namespace
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{
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struct Data
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{
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Data()
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: c(0)
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, d(0)
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, a()
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{
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}
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Data(char c_, double d_, std::array<int, 3> a_)
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: c(c_)
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, d(d_)
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, a(a_)
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{
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}
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char c;
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double d;
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std::array<int, 3> a;
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};
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constexpr size_t Size = etl::largest<char, double, Data>::size;
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constexpr size_t Alignment = etl::largest<char, double, Data>::alignment;
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// Test variant types.
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using MemCast = etl::mem_cast<Size, Alignment>;
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using MemCastTypes = etl::mem_cast_types<char, double, Data>;
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Data data;
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SUITE(test_mem_cast)
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{
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//*************************************************************************
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TEST(test_size)
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{
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MemCast memCast;
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MemCastTypes memCastTypes;
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CHECK(sizeof(char) <= MemCast::Size);
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CHECK(sizeof(short) <= MemCast::Size);
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CHECK(sizeof(Data) <= MemCast::Size);
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CHECK(sizeof(char) <= memCast.Size);
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CHECK(sizeof(short) <= memCast.Size);
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CHECK(sizeof(Data) <= memCast.Size);
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CHECK(sizeof(char) <= memCast.size());
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CHECK(sizeof(short) <= memCast.size());
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CHECK(sizeof(Data) <= memCast.size());
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CHECK(sizeof(char) <= MemCastTypes::Size);
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CHECK(sizeof(short) <= MemCastTypes::Size);
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CHECK(sizeof(Data) <= MemCastTypes::Size);
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CHECK(sizeof(char) <= memCastTypes.Size);
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CHECK(sizeof(short) <= memCastTypes.Size);
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CHECK(sizeof(Data) <= memCastTypes.Size);
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CHECK(sizeof(char) <= memCastTypes.size());
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CHECK(sizeof(short) <= memCastTypes.size());
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CHECK(sizeof(Data) <= memCastTypes.size());
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}
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//*************************************************************************
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TEST(test_alignment)
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{
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MemCast memCast;
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MemCastTypes memCastTypes;
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CHECK(alignof(char) <= MemCast::Alignment);
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CHECK(alignof(short) <= MemCast::Alignment);
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CHECK(alignof(Data) <= MemCast::Alignment);
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CHECK(alignof(char) <= memCast.Alignment);
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CHECK(alignof(short) <= memCast.Alignment);
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CHECK(alignof(Data) <= memCast.Alignment);
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CHECK(alignof(char) <= memCast.alignment());
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CHECK(alignof(short) <= memCast.alignment());
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CHECK(alignof(Data) <= memCast.alignment());
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CHECK(alignof(char) <= MemCastTypes::Alignment);
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CHECK(alignof(short) <= MemCastTypes::Alignment);
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CHECK(alignof(Data) <= MemCastTypes::Alignment);
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CHECK(alignof(char) <= memCastTypes.Alignment);
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CHECK(alignof(short) <= memCastTypes.Alignment);
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CHECK(alignof(Data) <= memCastTypes.Alignment);
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CHECK(alignof(char) <= memCastTypes.alignment());
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CHECK(alignof(short) <= memCastTypes.alignment());
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CHECK(alignof(Data) <= memCastTypes.alignment());
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}
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//*************************************************************************
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TEST(test_mem_cast_assign_type)
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{
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MemCast memCast;
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memCast.assign<char>(123);
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CHECK_EQUAL(123, memCast.ref<char>());
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memCast.assign<double>(1.23);
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CHECK_EQUAL(1.23, memCast.ref<double>());
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Data data(123, 1.23, std::array<int, 3>{ 1, 2, 3 });
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memCast.assign<Data>(data);
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CHECK_EQUAL(123, memCast.ref<Data>().c);
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CHECK_EQUAL(1.23, memCast.ref<Data>().d);
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CHECK_EQUAL(1, memCast.ref<Data>().a[0]);
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CHECK_EQUAL(2, memCast.ref<Data>().a[1]);
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CHECK_EQUAL(3, memCast.ref<Data>().a[2]);
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}
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//*************************************************************************
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TEST(test_mem_cast_assign_type_at_dynamic_offset)
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{
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MemCast memCast;
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using Array = std::array<int, 3>;
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Array a{ 1, 2, 3 };
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size_t offset = offsetof(Data, a);
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memCast.assign_at_offset<Array>(offset, a);
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CHECK_EQUAL(a[0], memCast.ref<Data>().a[0]);
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CHECK_EQUAL(a[1], memCast.ref<Data>().a[1]);
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CHECK_EQUAL(a[2], memCast.ref<Data>().a[2]);
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}
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//*************************************************************************
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TEST(test_mem_cast_assign_type_at_static_offset)
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{
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MemCast memCast;
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using Array = std::array<int, 3>;
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Array a{ 1, 2, 3 };
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constexpr size_t Offset = offsetof(Data, a);
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memCast.assign_at_offset<Array, Offset>(a);
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CHECK_EQUAL(a[0], memCast.ref<Data>().a[0]);
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CHECK_EQUAL(a[1], memCast.ref<Data>().a[1]);
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CHECK_EQUAL(a[2], memCast.ref<Data>().a[2]);
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}
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//*************************************************************************
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TEST(test_mem_cast_emplace_type)
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{
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MemCast memCast;
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memCast.emplace<char>(123);
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CHECK_EQUAL(123, memCast.ref<char>());
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memCast.emplace<double>(1.23);
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CHECK_EQUAL(1.23, memCast.ref<double>());
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memCast.emplace<Data>(123, 1.23, std::array<int, 3>{ 1, 2, 3 });
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CHECK_EQUAL(123, memCast.ref<Data>().c);
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CHECK_EQUAL(1.23, memCast.ref<Data>().d);
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CHECK_EQUAL(1, memCast.ref<Data>().a[0]);
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CHECK_EQUAL(2, memCast.ref<Data>().a[1]);
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CHECK_EQUAL(3, memCast.ref<Data>().a[2]);
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}
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//*************************************************************************
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TEST(test_mem_cast_emplace_type_at_dynamic_offset)
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{
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MemCast memCast;
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using Array = std::array<int, 3>;
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Array a{ 1, 2, 3 };
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size_t offset = offsetof(Data, a);
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memCast.emplace_at_offset<Array>(offset, a);
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CHECK_EQUAL(a[0], memCast.ref<Data>().a[0]);
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CHECK_EQUAL(a[1], memCast.ref<Data>().a[1]);
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CHECK_EQUAL(a[2], memCast.ref<Data>().a[2]);
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}
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//*************************************************************************
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TEST(test_mem_cast_emplace_type_at_static_offset)
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{
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MemCast memCast;
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using Array = std::array<int, 3>;
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Array a{ 1, 2, 3 };
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constexpr size_t Offset = offsetof(Data, a);
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memCast.emplace_at_offset<Array, Offset>(a);
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CHECK_EQUAL(a[0], memCast.ref<Data>().a[0]);
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CHECK_EQUAL(a[1], memCast.ref<Data>().a[1]);
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CHECK_EQUAL(a[2], memCast.ref<Data>().a[2]);
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}
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//*************************************************************************
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TEST(test_mem_cast_to_type)
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{
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MemCast memCast;
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char* pbuffer = memCast.data();
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*pbuffer = 123;
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CHECK_EQUAL(123, memCast.ref<char>());
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*reinterpret_cast<double*>(pbuffer) = 1.23;
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CHECK_EQUAL(1.23, memCast.ref<double>());
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*reinterpret_cast<Data*>(pbuffer) = { 123, 1.23, { 1, 2, 3 } };
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CHECK_EQUAL(123, memCast.ref<Data>().c);
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CHECK_EQUAL(1.23, memCast.ref<Data>().d);
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CHECK_EQUAL(1, memCast.ref<Data>().a[0]);
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CHECK_EQUAL(2, memCast.ref<Data>().a[1]);
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CHECK_EQUAL(3, memCast.ref<Data>().a[2]);
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}
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//*************************************************************************
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TEST(test_const_mem_cast_to_type)
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{
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MemCast memCast;
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const MemCast& memCastRef = memCast;
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char* pbuffer = memCast.data();
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*pbuffer = 123;
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CHECK_EQUAL(123, memCastRef.ref<char>());
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*reinterpret_cast<double*>(pbuffer) = 1.23;
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CHECK_EQUAL(1.23, memCastRef.ref<double>());
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*reinterpret_cast<Data*>(pbuffer) = { 123, 1.23, { 1, 2, 3 } };
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CHECK_EQUAL(123, memCastRef.ref<Data>().c);
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CHECK_EQUAL(1.23, memCastRef.ref<Data>().d);
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CHECK_EQUAL(1, memCast.ref<Data>().a[0]);
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CHECK_EQUAL(2, memCast.ref<Data>().a[1]);
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CHECK_EQUAL(3, memCast.ref<Data>().a[2]);
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}
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//*************************************************************************
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TEST(test_mem_cast_types_to_type)
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{
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MemCastTypes memCastTypes;
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char* pbuffer = memCastTypes.data();
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*pbuffer = 123;
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CHECK_EQUAL(123, memCastTypes.ref<char>());
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*reinterpret_cast<double*>(pbuffer) = 1.23;
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CHECK_EQUAL(1.23, memCastTypes.ref<double>());
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*reinterpret_cast<Data*>(pbuffer) = { 123, 1.23, { 1, 2, 3 } };
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CHECK_EQUAL(123, memCastTypes.ref<Data>().c);
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CHECK_EQUAL(1.23, memCastTypes.ref<Data>().d);
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CHECK_EQUAL(1, memCastTypes.ref<Data>().a[0]);
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CHECK_EQUAL(2, memCastTypes.ref<Data>().a[1]);
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CHECK_EQUAL(3, memCastTypes.ref<Data>().a[2]);
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}
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};
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}
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