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abseil-cpp/absl/container/internal/layout_test.cc

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// Copyright 2018 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "absl/container/internal/layout.h"
// We need ::max_align_t because some libstdc++ versions don't provide
// std::max_align_t
#include <stddef.h>
#include <cstdint>
#include <memory>
#include <sstream>
#include <type_traits>
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/types/span.h"
namespace absl {
namespace container_internal {
namespace {
using ::absl::Span;
using ::testing::ElementsAre;
size_t Distance(const void* from, const void* to) {
ABSL_RAW_CHECK(from <= to, "Distance must be non-negative");
return static_cast<const char*>(to) - static_cast<const char*>(from);
}
template <class Expected, class Actual>
Expected Type(Actual val) {
static_assert(std::is_same<Expected, Actual>(), "");
return val;
}
// Helper classes to test different size and alignments.
struct alignas(8) Int128 {
uint64_t a, b;
friend bool operator==(Int128 lhs, Int128 rhs) {
return std::tie(lhs.a, lhs.b) == std::tie(rhs.a, rhs.b);
}
static std::string Name() {
return internal_layout::adl_barrier::TypeName<Int128>();
}
};
// int64_t is *not* 8-byte aligned on all platforms!
struct alignas(8) Int64 {
int64_t a;
friend bool operator==(Int64 lhs, Int64 rhs) {
return lhs.a == rhs.a;
}
};
// Properties of types that this test relies on.
static_assert(sizeof(int8_t) == 1, "");
static_assert(alignof(int8_t) == 1, "");
static_assert(sizeof(int16_t) == 2, "");
static_assert(alignof(int16_t) == 2, "");
static_assert(sizeof(int32_t) == 4, "");
static_assert(alignof(int32_t) == 4, "");
static_assert(sizeof(Int64) == 8, "");
static_assert(alignof(Int64) == 8, "");
static_assert(sizeof(Int128) == 16, "");
static_assert(alignof(Int128) == 8, "");
template <class Expected, class Actual>
void SameType() {
static_assert(std::is_same<Expected, Actual>(), "");
}
TEST(Layout, ElementType) {
{
using L = Layout<int32_t>;
SameType<int32_t, L::ElementType<0>>();
SameType<int32_t, decltype(L::Partial())::ElementType<0>>();
SameType<int32_t, decltype(L::Partial(0))::ElementType<0>>();
}
{
using L = Layout<int32_t, int32_t>;
SameType<int32_t, L::ElementType<0>>();
SameType<int32_t, L::ElementType<1>>();
SameType<int32_t, decltype(L::Partial())::ElementType<0>>();
SameType<int32_t, decltype(L::Partial())::ElementType<1>>();
SameType<int32_t, decltype(L::Partial(0))::ElementType<0>>();
SameType<int32_t, decltype(L::Partial(0))::ElementType<1>>();
}
{
using L = Layout<int8_t, int32_t, Int128>;
SameType<int8_t, L::ElementType<0>>();
SameType<int32_t, L::ElementType<1>>();
SameType<Int128, L::ElementType<2>>();
SameType<int8_t, decltype(L::Partial())::ElementType<0>>();
SameType<int8_t, decltype(L::Partial(0))::ElementType<0>>();
SameType<int32_t, decltype(L::Partial(0))::ElementType<1>>();
SameType<int8_t, decltype(L::Partial(0, 0))::ElementType<0>>();
SameType<int32_t, decltype(L::Partial(0, 0))::ElementType<1>>();
SameType<Int128, decltype(L::Partial(0, 0))::ElementType<2>>();
SameType<int8_t, decltype(L::Partial(0, 0, 0))::ElementType<0>>();
SameType<int32_t, decltype(L::Partial(0, 0, 0))::ElementType<1>>();
SameType<Int128, decltype(L::Partial(0, 0, 0))::ElementType<2>>();
}
}
TEST(Layout, ElementTypes) {
{
using L = Layout<int32_t>;
SameType<std::tuple<int32_t>, L::ElementTypes>();
SameType<std::tuple<int32_t>, decltype(L::Partial())::ElementTypes>();
SameType<std::tuple<int32_t>, decltype(L::Partial(0))::ElementTypes>();
}
{
using L = Layout<int32_t, int32_t>;
SameType<std::tuple<int32_t, int32_t>, L::ElementTypes>();
SameType<std::tuple<int32_t, int32_t>, decltype(L::Partial())::ElementTypes>();
SameType<std::tuple<int32_t, int32_t>, decltype(L::Partial(0))::ElementTypes>();
}
{
using L = Layout<int8_t, int32_t, Int128>;
SameType<std::tuple<int8_t, int32_t, Int128>, L::ElementTypes>();
SameType<std::tuple<int8_t, int32_t, Int128>,
decltype(L::Partial())::ElementTypes>();
SameType<std::tuple<int8_t, int32_t, Int128>,
decltype(L::Partial(0))::ElementTypes>();
SameType<std::tuple<int8_t, int32_t, Int128>,
decltype(L::Partial(0, 0))::ElementTypes>();
SameType<std::tuple<int8_t, int32_t, Int128>,
decltype(L::Partial(0, 0, 0))::ElementTypes>();
}
}
TEST(Layout, OffsetByIndex) {
{
using L = Layout<int32_t>;
EXPECT_EQ(0, L::Partial().Offset<0>());
EXPECT_EQ(0, L::Partial(3).Offset<0>());
EXPECT_EQ(0, L(3).Offset<0>());
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_EQ(0, L::Partial().Offset<0>());
EXPECT_EQ(0, L::Partial(3).Offset<0>());
EXPECT_EQ(12, L::Partial(3).Offset<1>());
EXPECT_EQ(0, L::Partial(3, 5).Offset<0>());
EXPECT_EQ(12, L::Partial(3, 5).Offset<1>());
EXPECT_EQ(0, L(3, 5).Offset<0>());
EXPECT_EQ(12, L(3, 5).Offset<1>());
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(0, L::Partial().Offset<0>());
EXPECT_EQ(0, L::Partial(0).Offset<0>());
EXPECT_EQ(0, L::Partial(0).Offset<1>());
EXPECT_EQ(0, L::Partial(1).Offset<0>());
EXPECT_EQ(4, L::Partial(1).Offset<1>());
EXPECT_EQ(0, L::Partial(5).Offset<0>());
EXPECT_EQ(8, L::Partial(5).Offset<1>());
EXPECT_EQ(0, L::Partial(0, 0).Offset<0>());
EXPECT_EQ(0, L::Partial(0, 0).Offset<1>());
EXPECT_EQ(0, L::Partial(0, 0).Offset<2>());
EXPECT_EQ(0, L::Partial(1, 0).Offset<0>());
EXPECT_EQ(4, L::Partial(1, 0).Offset<1>());
EXPECT_EQ(8, L::Partial(1, 0).Offset<2>());
EXPECT_EQ(0, L::Partial(5, 3).Offset<0>());
EXPECT_EQ(8, L::Partial(5, 3).Offset<1>());
EXPECT_EQ(24, L::Partial(5, 3).Offset<2>());
EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<0>());
EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<1>());
EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<2>());
EXPECT_EQ(0, L::Partial(1, 0, 0).Offset<0>());
EXPECT_EQ(4, L::Partial(1, 0, 0).Offset<1>());
EXPECT_EQ(8, L::Partial(1, 0, 0).Offset<2>());
EXPECT_EQ(0, L::Partial(5, 3, 1).Offset<0>());
EXPECT_EQ(24, L::Partial(5, 3, 1).Offset<2>());
EXPECT_EQ(8, L::Partial(5, 3, 1).Offset<1>());
EXPECT_EQ(0, L(5, 3, 1).Offset<0>());
EXPECT_EQ(24, L(5, 3, 1).Offset<2>());
EXPECT_EQ(8, L(5, 3, 1).Offset<1>());
}
}
TEST(Layout, OffsetByType) {
{
using L = Layout<int32_t>;
EXPECT_EQ(0, L::Partial().Offset<int32_t>());
EXPECT_EQ(0, L::Partial(3).Offset<int32_t>());
EXPECT_EQ(0, L(3).Offset<int32_t>());
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(0, L::Partial().Offset<int8_t>());
EXPECT_EQ(0, L::Partial(0).Offset<int8_t>());
EXPECT_EQ(0, L::Partial(0).Offset<int32_t>());
EXPECT_EQ(0, L::Partial(1).Offset<int8_t>());
EXPECT_EQ(4, L::Partial(1).Offset<int32_t>());
EXPECT_EQ(0, L::Partial(5).Offset<int8_t>());
EXPECT_EQ(8, L::Partial(5).Offset<int32_t>());
EXPECT_EQ(0, L::Partial(0, 0).Offset<int8_t>());
EXPECT_EQ(0, L::Partial(0, 0).Offset<int32_t>());
EXPECT_EQ(0, L::Partial(0, 0).Offset<Int128>());
EXPECT_EQ(0, L::Partial(1, 0).Offset<int8_t>());
EXPECT_EQ(4, L::Partial(1, 0).Offset<int32_t>());
EXPECT_EQ(8, L::Partial(1, 0).Offset<Int128>());
EXPECT_EQ(0, L::Partial(5, 3).Offset<int8_t>());
EXPECT_EQ(8, L::Partial(5, 3).Offset<int32_t>());
EXPECT_EQ(24, L::Partial(5, 3).Offset<Int128>());
EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<int8_t>());
EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<int32_t>());
EXPECT_EQ(0, L::Partial(0, 0, 0).Offset<Int128>());
EXPECT_EQ(0, L::Partial(1, 0, 0).Offset<int8_t>());
EXPECT_EQ(4, L::Partial(1, 0, 0).Offset<int32_t>());
EXPECT_EQ(8, L::Partial(1, 0, 0).Offset<Int128>());
EXPECT_EQ(0, L::Partial(5, 3, 1).Offset<int8_t>());
EXPECT_EQ(24, L::Partial(5, 3, 1).Offset<Int128>());
EXPECT_EQ(8, L::Partial(5, 3, 1).Offset<int32_t>());
EXPECT_EQ(0, L(5, 3, 1).Offset<int8_t>());
EXPECT_EQ(24, L(5, 3, 1).Offset<Int128>());
EXPECT_EQ(8, L(5, 3, 1).Offset<int32_t>());
}
}
TEST(Layout, Offsets) {
{
using L = Layout<int32_t>;
EXPECT_THAT(L::Partial().Offsets(), ElementsAre(0));
EXPECT_THAT(L::Partial(3).Offsets(), ElementsAre(0));
EXPECT_THAT(L(3).Offsets(), ElementsAre(0));
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_THAT(L::Partial().Offsets(), ElementsAre(0));
EXPECT_THAT(L::Partial(3).Offsets(), ElementsAre(0, 12));
EXPECT_THAT(L::Partial(3, 5).Offsets(), ElementsAre(0, 12));
EXPECT_THAT(L(3, 5).Offsets(), ElementsAre(0, 12));
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_THAT(L::Partial().Offsets(), ElementsAre(0));
EXPECT_THAT(L::Partial(1).Offsets(), ElementsAre(0, 4));
EXPECT_THAT(L::Partial(5).Offsets(), ElementsAre(0, 8));
EXPECT_THAT(L::Partial(0, 0).Offsets(), ElementsAre(0, 0, 0));
EXPECT_THAT(L::Partial(1, 0).Offsets(), ElementsAre(0, 4, 8));
EXPECT_THAT(L::Partial(5, 3).Offsets(), ElementsAre(0, 8, 24));
EXPECT_THAT(L::Partial(0, 0, 0).Offsets(), ElementsAre(0, 0, 0));
EXPECT_THAT(L::Partial(1, 0, 0).Offsets(), ElementsAre(0, 4, 8));
EXPECT_THAT(L::Partial(5, 3, 1).Offsets(), ElementsAre(0, 8, 24));
EXPECT_THAT(L(5, 3, 1).Offsets(), ElementsAre(0, 8, 24));
}
}
TEST(Layout, AllocSize) {
{
using L = Layout<int32_t>;
EXPECT_EQ(0, L::Partial(0).AllocSize());
EXPECT_EQ(12, L::Partial(3).AllocSize());
EXPECT_EQ(12, L(3).AllocSize());
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_EQ(32, L::Partial(3, 5).AllocSize());
EXPECT_EQ(32, L(3, 5).AllocSize());
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(0, L::Partial(0, 0, 0).AllocSize());
EXPECT_EQ(8, L::Partial(1, 0, 0).AllocSize());
EXPECT_EQ(8, L::Partial(0, 1, 0).AllocSize());
EXPECT_EQ(16, L::Partial(0, 0, 1).AllocSize());
EXPECT_EQ(24, L::Partial(1, 1, 1).AllocSize());
EXPECT_EQ(136, L::Partial(3, 5, 7).AllocSize());
EXPECT_EQ(136, L(3, 5, 7).AllocSize());
}
}
TEST(Layout, SizeByIndex) {
{
using L = Layout<int32_t>;
EXPECT_EQ(0, L::Partial(0).Size<0>());
EXPECT_EQ(3, L::Partial(3).Size<0>());
EXPECT_EQ(3, L(3).Size<0>());
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_EQ(0, L::Partial(0).Size<0>());
EXPECT_EQ(3, L::Partial(3).Size<0>());
EXPECT_EQ(3, L::Partial(3, 5).Size<0>());
EXPECT_EQ(5, L::Partial(3, 5).Size<1>());
EXPECT_EQ(3, L(3, 5).Size<0>());
EXPECT_EQ(5, L(3, 5).Size<1>());
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(3, L::Partial(3).Size<0>());
EXPECT_EQ(3, L::Partial(3, 5).Size<0>());
EXPECT_EQ(5, L::Partial(3, 5).Size<1>());
EXPECT_EQ(3, L::Partial(3, 5, 7).Size<0>());
EXPECT_EQ(5, L::Partial(3, 5, 7).Size<1>());
EXPECT_EQ(7, L::Partial(3, 5, 7).Size<2>());
EXPECT_EQ(3, L(3, 5, 7).Size<0>());
EXPECT_EQ(5, L(3, 5, 7).Size<1>());
EXPECT_EQ(7, L(3, 5, 7).Size<2>());
}
}
TEST(Layout, SizeByType) {
{
using L = Layout<int32_t>;
EXPECT_EQ(0, L::Partial(0).Size<int32_t>());
EXPECT_EQ(3, L::Partial(3).Size<int32_t>());
EXPECT_EQ(3, L(3).Size<int32_t>());
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(3, L::Partial(3).Size<int8_t>());
EXPECT_EQ(3, L::Partial(3, 5).Size<int8_t>());
EXPECT_EQ(5, L::Partial(3, 5).Size<int32_t>());
EXPECT_EQ(3, L::Partial(3, 5, 7).Size<int8_t>());
EXPECT_EQ(5, L::Partial(3, 5, 7).Size<int32_t>());
EXPECT_EQ(7, L::Partial(3, 5, 7).Size<Int128>());
EXPECT_EQ(3, L(3, 5, 7).Size<int8_t>());
EXPECT_EQ(5, L(3, 5, 7).Size<int32_t>());
EXPECT_EQ(7, L(3, 5, 7).Size<Int128>());
}
}
TEST(Layout, Sizes) {
{
using L = Layout<int32_t>;
EXPECT_THAT(L::Partial().Sizes(), ElementsAre());
EXPECT_THAT(L::Partial(3).Sizes(), ElementsAre(3));
EXPECT_THAT(L(3).Sizes(), ElementsAre(3));
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_THAT(L::Partial().Sizes(), ElementsAre());
EXPECT_THAT(L::Partial(3).Sizes(), ElementsAre(3));
EXPECT_THAT(L::Partial(3, 5).Sizes(), ElementsAre(3, 5));
EXPECT_THAT(L(3, 5).Sizes(), ElementsAre(3, 5));
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_THAT(L::Partial().Sizes(), ElementsAre());
EXPECT_THAT(L::Partial(3).Sizes(), ElementsAre(3));
EXPECT_THAT(L::Partial(3, 5).Sizes(), ElementsAre(3, 5));
EXPECT_THAT(L::Partial(3, 5, 7).Sizes(), ElementsAre(3, 5, 7));
EXPECT_THAT(L(3, 5, 7).Sizes(), ElementsAre(3, 5, 7));
}
}
TEST(Layout, PointerByIndex) {
alignas(max_align_t) const unsigned char p[100] = {};
{
using L = Layout<int32_t>;
EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L::Partial().Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L::Partial(3).Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L(3).Pointer<0>(p))));
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L::Partial().Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L::Partial(3).Pointer<0>(p))));
EXPECT_EQ(12, Distance(p, Type<const int32_t*>(L::Partial(3).Pointer<1>(p))));
EXPECT_EQ(0,
Distance(p, Type<const int32_t*>(L::Partial(3, 5).Pointer<0>(p))));
EXPECT_EQ(12,
Distance(p, Type<const int32_t*>(L::Partial(3, 5).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L(3, 5).Pointer<0>(p))));
EXPECT_EQ(12, Distance(p, Type<const int32_t*>(L(3, 5).Pointer<1>(p))));
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L::Partial().Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L::Partial(0).Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L::Partial(0).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L::Partial(1).Pointer<0>(p))));
EXPECT_EQ(4, Distance(p, Type<const int32_t*>(L::Partial(1).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L::Partial(5).Pointer<0>(p))));
EXPECT_EQ(8, Distance(p, Type<const int32_t*>(L::Partial(5).Pointer<1>(p))));
EXPECT_EQ(0,
Distance(p, Type<const int8_t*>(L::Partial(0, 0).Pointer<0>(p))));
EXPECT_EQ(0,
Distance(p, Type<const int32_t*>(L::Partial(0, 0).Pointer<1>(p))));
EXPECT_EQ(0,
Distance(p, Type<const Int128*>(L::Partial(0, 0).Pointer<2>(p))));
EXPECT_EQ(0,
Distance(p, Type<const int8_t*>(L::Partial(1, 0).Pointer<0>(p))));
EXPECT_EQ(4,
Distance(p, Type<const int32_t*>(L::Partial(1, 0).Pointer<1>(p))));
EXPECT_EQ(8,
Distance(p, Type<const Int128*>(L::Partial(1, 0).Pointer<2>(p))));
EXPECT_EQ(0,
Distance(p, Type<const int8_t*>(L::Partial(5, 3).Pointer<0>(p))));
EXPECT_EQ(8,
Distance(p, Type<const int32_t*>(L::Partial(5, 3).Pointer<1>(p))));
EXPECT_EQ(24,
Distance(p, Type<const Int128*>(L::Partial(5, 3).Pointer<2>(p))));
EXPECT_EQ(
0, Distance(p, Type<const int8_t*>(L::Partial(0, 0, 0).Pointer<0>(p))));
EXPECT_EQ(
0, Distance(p, Type<const int32_t*>(L::Partial(0, 0, 0).Pointer<1>(p))));
EXPECT_EQ(
0, Distance(p, Type<const Int128*>(L::Partial(0, 0, 0).Pointer<2>(p))));
EXPECT_EQ(
0, Distance(p, Type<const int8_t*>(L::Partial(1, 0, 0).Pointer<0>(p))));
EXPECT_EQ(
4, Distance(p, Type<const int32_t*>(L::Partial(1, 0, 0).Pointer<1>(p))));
EXPECT_EQ(
8, Distance(p, Type<const Int128*>(L::Partial(1, 0, 0).Pointer<2>(p))));
EXPECT_EQ(
0, Distance(p, Type<const int8_t*>(L::Partial(5, 3, 1).Pointer<0>(p))));
EXPECT_EQ(
24,
Distance(p, Type<const Int128*>(L::Partial(5, 3, 1).Pointer<2>(p))));
EXPECT_EQ(
8, Distance(p, Type<const int32_t*>(L::Partial(5, 3, 1).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L(5, 3, 1).Pointer<0>(p))));
EXPECT_EQ(24, Distance(p, Type<const Int128*>(L(5, 3, 1).Pointer<2>(p))));
EXPECT_EQ(8, Distance(p, Type<const int32_t*>(L(5, 3, 1).Pointer<1>(p))));
}
}
TEST(Layout, PointerByType) {
alignas(max_align_t) const unsigned char p[100] = {};
{
using L = Layout<int32_t>;
EXPECT_EQ(0,
Distance(p, Type<const int32_t*>(L::Partial().Pointer<int32_t>(p))));
EXPECT_EQ(0,
Distance(p, Type<const int32_t*>(L::Partial(3).Pointer<int32_t>(p))));
EXPECT_EQ(0, Distance(p, Type<const int32_t*>(L(3).Pointer<int32_t>(p))));
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(0, Distance(p, Type<const int8_t*>(L::Partial().Pointer<int8_t>(p))));
EXPECT_EQ(0,
Distance(p, Type<const int8_t*>(L::Partial(0).Pointer<int8_t>(p))));
EXPECT_EQ(0,
Distance(p, Type<const int32_t*>(L::Partial(0).Pointer<int32_t>(p))));
EXPECT_EQ(0,
Distance(p, Type<const int8_t*>(L::Partial(1).Pointer<int8_t>(p))));
EXPECT_EQ(4,
Distance(p, Type<const int32_t*>(L::Partial(1).Pointer<int32_t>(p))));
EXPECT_EQ(0,
Distance(p, Type<const int8_t*>(L::Partial(5).Pointer<int8_t>(p))));
EXPECT_EQ(8,
Distance(p, Type<const int32_t*>(L::Partial(5).Pointer<int32_t>(p))));
EXPECT_EQ(
0, Distance(p, Type<const int8_t*>(L::Partial(0, 0).Pointer<int8_t>(p))));
EXPECT_EQ(
0, Distance(p, Type<const int32_t*>(L::Partial(0, 0).Pointer<int32_t>(p))));
EXPECT_EQ(
0,
Distance(p, Type<const Int128*>(L::Partial(0, 0).Pointer<Int128>(p))));
EXPECT_EQ(
0, Distance(p, Type<const int8_t*>(L::Partial(1, 0).Pointer<int8_t>(p))));
EXPECT_EQ(
4, Distance(p, Type<const int32_t*>(L::Partial(1, 0).Pointer<int32_t>(p))));
EXPECT_EQ(
8,
Distance(p, Type<const Int128*>(L::Partial(1, 0).Pointer<Int128>(p))));
EXPECT_EQ(
0, Distance(p, Type<const int8_t*>(L::Partial(5, 3).Pointer<int8_t>(p))));
EXPECT_EQ(
8, Distance(p, Type<const int32_t*>(L::Partial(5, 3).Pointer<int32_t>(p))));
EXPECT_EQ(
24,
Distance(p, Type<const Int128*>(L::Partial(5, 3).Pointer<Int128>(p))));
EXPECT_EQ(
0,
Distance(p, Type<const int8_t*>(L::Partial(0, 0, 0).Pointer<int8_t>(p))));
EXPECT_EQ(
0,
Distance(p, Type<const int32_t*>(L::Partial(0, 0, 0).Pointer<int32_t>(p))));
EXPECT_EQ(0, Distance(p, Type<const Int128*>(
L::Partial(0, 0, 0).Pointer<Int128>(p))));
EXPECT_EQ(
0,
Distance(p, Type<const int8_t*>(L::Partial(1, 0, 0).Pointer<int8_t>(p))));
EXPECT_EQ(
4,
Distance(p, Type<const int32_t*>(L::Partial(1, 0, 0).Pointer<int32_t>(p))));
EXPECT_EQ(8, Distance(p, Type<const Int128*>(
L::Partial(1, 0, 0).Pointer<Int128>(p))));
EXPECT_EQ(
0,
Distance(p, Type<const int8_t*>(L::Partial(5, 3, 1).Pointer<int8_t>(p))));
EXPECT_EQ(24, Distance(p, Type<const Int128*>(
L::Partial(5, 3, 1).Pointer<Int128>(p))));
EXPECT_EQ(
8,
Distance(p, Type<const int32_t*>(L::Partial(5, 3, 1).Pointer<int32_t>(p))));
EXPECT_EQ(24,
Distance(p, Type<const Int128*>(L(5, 3, 1).Pointer<Int128>(p))));
EXPECT_EQ(8, Distance(p, Type<const int32_t*>(L(5, 3, 1).Pointer<int32_t>(p))));
}
}
TEST(Layout, MutablePointerByIndex) {
alignas(max_align_t) unsigned char p[100];
{
using L = Layout<int32_t>;
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial().Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(3).Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L(3).Pointer<0>(p))));
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial().Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(3).Pointer<0>(p))));
EXPECT_EQ(12, Distance(p, Type<int32_t*>(L::Partial(3).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(3, 5).Pointer<0>(p))));
EXPECT_EQ(12, Distance(p, Type<int32_t*>(L::Partial(3, 5).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L(3, 5).Pointer<0>(p))));
EXPECT_EQ(12, Distance(p, Type<int32_t*>(L(3, 5).Pointer<1>(p))));
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial().Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(0).Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(0).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(1).Pointer<0>(p))));
EXPECT_EQ(4, Distance(p, Type<int32_t*>(L::Partial(1).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(5).Pointer<0>(p))));
EXPECT_EQ(8, Distance(p, Type<int32_t*>(L::Partial(5).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(0, 0).Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(0, 0).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<Int128*>(L::Partial(0, 0).Pointer<2>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(1, 0).Pointer<0>(p))));
EXPECT_EQ(4, Distance(p, Type<int32_t*>(L::Partial(1, 0).Pointer<1>(p))));
EXPECT_EQ(8, Distance(p, Type<Int128*>(L::Partial(1, 0).Pointer<2>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(5, 3).Pointer<0>(p))));
EXPECT_EQ(8, Distance(p, Type<int32_t*>(L::Partial(5, 3).Pointer<1>(p))));
EXPECT_EQ(24, Distance(p, Type<Int128*>(L::Partial(5, 3).Pointer<2>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(0, 0, 0).Pointer<0>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(0, 0, 0).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<Int128*>(L::Partial(0, 0, 0).Pointer<2>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(1, 0, 0).Pointer<0>(p))));
EXPECT_EQ(4, Distance(p, Type<int32_t*>(L::Partial(1, 0, 0).Pointer<1>(p))));
EXPECT_EQ(8, Distance(p, Type<Int128*>(L::Partial(1, 0, 0).Pointer<2>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(5, 3, 1).Pointer<0>(p))));
EXPECT_EQ(24,
Distance(p, Type<Int128*>(L::Partial(5, 3, 1).Pointer<2>(p))));
EXPECT_EQ(8, Distance(p, Type<int32_t*>(L::Partial(5, 3, 1).Pointer<1>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L(5, 3, 1).Pointer<0>(p))));
EXPECT_EQ(24, Distance(p, Type<Int128*>(L(5, 3, 1).Pointer<2>(p))));
EXPECT_EQ(8, Distance(p, Type<int32_t*>(L(5, 3, 1).Pointer<1>(p))));
}
}
TEST(Layout, MutablePointerByType) {
alignas(max_align_t) unsigned char p[100];
{
using L = Layout<int32_t>;
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial().Pointer<int32_t>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(3).Pointer<int32_t>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L(3).Pointer<int32_t>(p))));
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial().Pointer<int8_t>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(0).Pointer<int8_t>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(0).Pointer<int32_t>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(1).Pointer<int8_t>(p))));
EXPECT_EQ(4, Distance(p, Type<int32_t*>(L::Partial(1).Pointer<int32_t>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(5).Pointer<int8_t>(p))));
EXPECT_EQ(8, Distance(p, Type<int32_t*>(L::Partial(5).Pointer<int32_t>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(0, 0).Pointer<int8_t>(p))));
EXPECT_EQ(0, Distance(p, Type<int32_t*>(L::Partial(0, 0).Pointer<int32_t>(p))));
EXPECT_EQ(0,
Distance(p, Type<Int128*>(L::Partial(0, 0).Pointer<Int128>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(1, 0).Pointer<int8_t>(p))));
EXPECT_EQ(4, Distance(p, Type<int32_t*>(L::Partial(1, 0).Pointer<int32_t>(p))));
EXPECT_EQ(8,
Distance(p, Type<Int128*>(L::Partial(1, 0).Pointer<Int128>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L::Partial(5, 3).Pointer<int8_t>(p))));
EXPECT_EQ(8, Distance(p, Type<int32_t*>(L::Partial(5, 3).Pointer<int32_t>(p))));
EXPECT_EQ(24,
Distance(p, Type<Int128*>(L::Partial(5, 3).Pointer<Int128>(p))));
EXPECT_EQ(0,
Distance(p, Type<int8_t*>(L::Partial(0, 0, 0).Pointer<int8_t>(p))));
EXPECT_EQ(0,
Distance(p, Type<int32_t*>(L::Partial(0, 0, 0).Pointer<int32_t>(p))));
EXPECT_EQ(
0, Distance(p, Type<Int128*>(L::Partial(0, 0, 0).Pointer<Int128>(p))));
EXPECT_EQ(0,
Distance(p, Type<int8_t*>(L::Partial(1, 0, 0).Pointer<int8_t>(p))));
EXPECT_EQ(4,
Distance(p, Type<int32_t*>(L::Partial(1, 0, 0).Pointer<int32_t>(p))));
EXPECT_EQ(
8, Distance(p, Type<Int128*>(L::Partial(1, 0, 0).Pointer<Int128>(p))));
EXPECT_EQ(0,
Distance(p, Type<int8_t*>(L::Partial(5, 3, 1).Pointer<int8_t>(p))));
EXPECT_EQ(
24, Distance(p, Type<Int128*>(L::Partial(5, 3, 1).Pointer<Int128>(p))));
EXPECT_EQ(8,
Distance(p, Type<int32_t*>(L::Partial(5, 3, 1).Pointer<int32_t>(p))));
EXPECT_EQ(0, Distance(p, Type<int8_t*>(L(5, 3, 1).Pointer<int8_t>(p))));
EXPECT_EQ(24, Distance(p, Type<Int128*>(L(5, 3, 1).Pointer<Int128>(p))));
EXPECT_EQ(8, Distance(p, Type<int32_t*>(L(5, 3, 1).Pointer<int32_t>(p))));
}
}
TEST(Layout, Pointers) {
alignas(max_align_t) const unsigned char p[100] = {};
using L = Layout<int8_t, int8_t, Int128>;
{
const auto x = L::Partial();
EXPECT_EQ(std::make_tuple(x.Pointer<0>(p)),
Type<std::tuple<const int8_t*>>(x.Pointers(p)));
}
{
const auto x = L::Partial(1);
EXPECT_EQ(std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p)),
(Type<std::tuple<const int8_t*, const int8_t*>>(x.Pointers(p))));
}
{
const auto x = L::Partial(1, 2);
EXPECT_EQ(
std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
(Type<std::tuple<const int8_t*, const int8_t*, const Int128*>>(
x.Pointers(p))));
}
{
const auto x = L::Partial(1, 2, 3);
EXPECT_EQ(
std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
(Type<std::tuple<const int8_t*, const int8_t*, const Int128*>>(
x.Pointers(p))));
}
{
const L x(1, 2, 3);
EXPECT_EQ(
std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
(Type<std::tuple<const int8_t*, const int8_t*, const Int128*>>(
x.Pointers(p))));
}
}
TEST(Layout, MutablePointers) {
alignas(max_align_t) unsigned char p[100];
using L = Layout<int8_t, int8_t, Int128>;
{
const auto x = L::Partial();
EXPECT_EQ(std::make_tuple(x.Pointer<0>(p)),
Type<std::tuple<int8_t*>>(x.Pointers(p)));
}
{
const auto x = L::Partial(1);
EXPECT_EQ(std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p)),
(Type<std::tuple<int8_t*, int8_t*>>(x.Pointers(p))));
}
{
const auto x = L::Partial(1, 2);
EXPECT_EQ(
std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
(Type<std::tuple<int8_t*, int8_t*, Int128*>>(x.Pointers(p))));
}
{
const auto x = L::Partial(1, 2, 3);
EXPECT_EQ(
std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
(Type<std::tuple<int8_t*, int8_t*, Int128*>>(x.Pointers(p))));
}
{
const L x(1, 2, 3);
EXPECT_EQ(
std::make_tuple(x.Pointer<0>(p), x.Pointer<1>(p), x.Pointer<2>(p)),
(Type<std::tuple<int8_t*, int8_t*, Int128*>>(x.Pointers(p))));
}
}
TEST(Layout, SliceByIndexSize) {
alignas(max_align_t) const unsigned char p[100] = {};
{
using L = Layout<int32_t>;
EXPECT_EQ(0, L::Partial(0).Slice<0>(p).size());
EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
EXPECT_EQ(3, L(3).Slice<0>(p).size());
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
EXPECT_EQ(5, L::Partial(3, 5).Slice<1>(p).size());
EXPECT_EQ(5, L(3, 5).Slice<1>(p).size());
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
EXPECT_EQ(3, L::Partial(3, 5).Slice<0>(p).size());
EXPECT_EQ(5, L::Partial(3, 5).Slice<1>(p).size());
EXPECT_EQ(3, L::Partial(3, 5, 7).Slice<0>(p).size());
EXPECT_EQ(5, L::Partial(3, 5, 7).Slice<1>(p).size());
EXPECT_EQ(7, L::Partial(3, 5, 7).Slice<2>(p).size());
EXPECT_EQ(3, L(3, 5, 7).Slice<0>(p).size());
EXPECT_EQ(5, L(3, 5, 7).Slice<1>(p).size());
EXPECT_EQ(7, L(3, 5, 7).Slice<2>(p).size());
}
}
TEST(Layout, SliceByTypeSize) {
alignas(max_align_t) const unsigned char p[100] = {};
{
using L = Layout<int32_t>;
EXPECT_EQ(0, L::Partial(0).Slice<int32_t>(p).size());
EXPECT_EQ(3, L::Partial(3).Slice<int32_t>(p).size());
EXPECT_EQ(3, L(3).Slice<int32_t>(p).size());
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(3, L::Partial(3).Slice<int8_t>(p).size());
EXPECT_EQ(3, L::Partial(3, 5).Slice<int8_t>(p).size());
EXPECT_EQ(5, L::Partial(3, 5).Slice<int32_t>(p).size());
EXPECT_EQ(3, L::Partial(3, 5, 7).Slice<int8_t>(p).size());
EXPECT_EQ(5, L::Partial(3, 5, 7).Slice<int32_t>(p).size());
EXPECT_EQ(7, L::Partial(3, 5, 7).Slice<Int128>(p).size());
EXPECT_EQ(3, L(3, 5, 7).Slice<int8_t>(p).size());
EXPECT_EQ(5, L(3, 5, 7).Slice<int32_t>(p).size());
EXPECT_EQ(7, L(3, 5, 7).Slice<Int128>(p).size());
}
}
TEST(Layout, MutableSliceByIndexSize) {
alignas(max_align_t) unsigned char p[100];
{
using L = Layout<int32_t>;
EXPECT_EQ(0, L::Partial(0).Slice<0>(p).size());
EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
EXPECT_EQ(3, L(3).Slice<0>(p).size());
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
EXPECT_EQ(5, L::Partial(3, 5).Slice<1>(p).size());
EXPECT_EQ(5, L(3, 5).Slice<1>(p).size());
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(3, L::Partial(3).Slice<0>(p).size());
EXPECT_EQ(3, L::Partial(3, 5).Slice<0>(p).size());
EXPECT_EQ(5, L::Partial(3, 5).Slice<1>(p).size());
EXPECT_EQ(3, L::Partial(3, 5, 7).Slice<0>(p).size());
EXPECT_EQ(5, L::Partial(3, 5, 7).Slice<1>(p).size());
EXPECT_EQ(7, L::Partial(3, 5, 7).Slice<2>(p).size());
EXPECT_EQ(3, L(3, 5, 7).Slice<0>(p).size());
EXPECT_EQ(5, L(3, 5, 7).Slice<1>(p).size());
EXPECT_EQ(7, L(3, 5, 7).Slice<2>(p).size());
}
}
TEST(Layout, MutableSliceByTypeSize) {
alignas(max_align_t) unsigned char p[100];
{
using L = Layout<int32_t>;
EXPECT_EQ(0, L::Partial(0).Slice<int32_t>(p).size());
EXPECT_EQ(3, L::Partial(3).Slice<int32_t>(p).size());
EXPECT_EQ(3, L(3).Slice<int32_t>(p).size());
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(3, L::Partial(3).Slice<int8_t>(p).size());
EXPECT_EQ(3, L::Partial(3, 5).Slice<int8_t>(p).size());
EXPECT_EQ(5, L::Partial(3, 5).Slice<int32_t>(p).size());
EXPECT_EQ(3, L::Partial(3, 5, 7).Slice<int8_t>(p).size());
EXPECT_EQ(5, L::Partial(3, 5, 7).Slice<int32_t>(p).size());
EXPECT_EQ(7, L::Partial(3, 5, 7).Slice<Int128>(p).size());
EXPECT_EQ(3, L(3, 5, 7).Slice<int8_t>(p).size());
EXPECT_EQ(5, L(3, 5, 7).Slice<int32_t>(p).size());
EXPECT_EQ(7, L(3, 5, 7).Slice<Int128>(p).size());
}
}
TEST(Layout, SliceByIndexData) {
alignas(max_align_t) const unsigned char p[100] = {};
{
using L = Layout<int32_t>;
EXPECT_EQ(
0,
Distance(p, Type<Span<const int32_t>>(L::Partial(0).Slice<0>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<const int32_t>>(L::Partial(3).Slice<0>(p)).data()));
EXPECT_EQ(0, Distance(p, Type<Span<const int32_t>>(L(3).Slice<0>(p)).data()));
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_EQ(
0,
Distance(p, Type<Span<const int32_t>>(L::Partial(3).Slice<0>(p)).data()));
EXPECT_EQ(
0,
Distance(p,
Type<Span<const int32_t>>(L::Partial(3, 5).Slice<0>(p)).data()));
EXPECT_EQ(
12,
Distance(p,
Type<Span<const int32_t>>(L::Partial(3, 5).Slice<1>(p)).data()));
EXPECT_EQ(0,
Distance(p, Type<Span<const int32_t>>(L(3, 5).Slice<0>(p)).data()));
EXPECT_EQ(12,
Distance(p, Type<Span<const int32_t>>(L(3, 5).Slice<1>(p)).data()));
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(
0,
Distance(p, Type<Span<const int8_t>>(L::Partial(0).Slice<0>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<const int8_t>>(L::Partial(1).Slice<0>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<const int8_t>>(L::Partial(5).Slice<0>(p)).data()));
EXPECT_EQ(
0, Distance(
p, Type<Span<const int8_t>>(L::Partial(0, 0).Slice<0>(p)).data()));
EXPECT_EQ(
0,
Distance(p,
Type<Span<const int32_t>>(L::Partial(0, 0).Slice<1>(p)).data()));
EXPECT_EQ(
0, Distance(
p, Type<Span<const int8_t>>(L::Partial(1, 0).Slice<0>(p)).data()));
EXPECT_EQ(
4,
Distance(p,
Type<Span<const int32_t>>(L::Partial(1, 0).Slice<1>(p)).data()));
EXPECT_EQ(
0, Distance(
p, Type<Span<const int8_t>>(L::Partial(5, 3).Slice<0>(p)).data()));
EXPECT_EQ(
8,
Distance(p,
Type<Span<const int32_t>>(L::Partial(5, 3).Slice<1>(p)).data()));
EXPECT_EQ(
0,
Distance(
p, Type<Span<const int8_t>>(L::Partial(0, 0, 0).Slice<0>(p)).data()));
EXPECT_EQ(
0,
Distance(
p,
Type<Span<const int32_t>>(L::Partial(0, 0, 0).Slice<1>(p)).data()));
EXPECT_EQ(
0,
Distance(
p,
Type<Span<const Int128>>(L::Partial(0, 0, 0).Slice<2>(p)).data()));
EXPECT_EQ(
0,
Distance(
p, Type<Span<const int8_t>>(L::Partial(1, 0, 0).Slice<0>(p)).data()));
EXPECT_EQ(
4,
Distance(
p,
Type<Span<const int32_t>>(L::Partial(1, 0, 0).Slice<1>(p)).data()));
EXPECT_EQ(
8,
Distance(
p,
Type<Span<const Int128>>(L::Partial(1, 0, 0).Slice<2>(p)).data()));
EXPECT_EQ(
0,
Distance(
p, Type<Span<const int8_t>>(L::Partial(5, 3, 1).Slice<0>(p)).data()));
EXPECT_EQ(
24,
Distance(
p,
Type<Span<const Int128>>(L::Partial(5, 3, 1).Slice<2>(p)).data()));
EXPECT_EQ(
8,
Distance(
p,
Type<Span<const int32_t>>(L::Partial(5, 3, 1).Slice<1>(p)).data()));
EXPECT_EQ(
0, Distance(p, Type<Span<const int8_t>>(L(5, 3, 1).Slice<0>(p)).data()));
EXPECT_EQ(
24,
Distance(p, Type<Span<const Int128>>(L(5, 3, 1).Slice<2>(p)).data()));
EXPECT_EQ(
8, Distance(p, Type<Span<const int32_t>>(L(5, 3, 1).Slice<1>(p)).data()));
}
}
TEST(Layout, SliceByTypeData) {
alignas(max_align_t) const unsigned char p[100] = {};
{
using L = Layout<int32_t>;
EXPECT_EQ(
0,
Distance(
p, Type<Span<const int32_t>>(L::Partial(0).Slice<int32_t>(p)).data()));
EXPECT_EQ(
0,
Distance(
p, Type<Span<const int32_t>>(L::Partial(3).Slice<int32_t>(p)).data()));
EXPECT_EQ(
0, Distance(p, Type<Span<const int32_t>>(L(3).Slice<int32_t>(p)).data()));
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(
0, Distance(
p, Type<Span<const int8_t>>(L::Partial(0).Slice<int8_t>(p)).data()));
EXPECT_EQ(
0, Distance(
p, Type<Span<const int8_t>>(L::Partial(1).Slice<int8_t>(p)).data()));
EXPECT_EQ(
0, Distance(
p, Type<Span<const int8_t>>(L::Partial(5).Slice<int8_t>(p)).data()));
EXPECT_EQ(
0,
Distance(
p, Type<Span<const int8_t>>(L::Partial(0, 0).Slice<int8_t>(p)).data()));
EXPECT_EQ(
0,
Distance(
p,
Type<Span<const int32_t>>(L::Partial(0, 0).Slice<int32_t>(p)).data()));
EXPECT_EQ(
0,
Distance(
p, Type<Span<const int8_t>>(L::Partial(1, 0).Slice<int8_t>(p)).data()));
EXPECT_EQ(
4,
Distance(
p,
Type<Span<const int32_t>>(L::Partial(1, 0).Slice<int32_t>(p)).data()));
EXPECT_EQ(
0,
Distance(
p, Type<Span<const int8_t>>(L::Partial(5, 3).Slice<int8_t>(p)).data()));
EXPECT_EQ(
8,
Distance(
p,
Type<Span<const int32_t>>(L::Partial(5, 3).Slice<int32_t>(p)).data()));
EXPECT_EQ(
0,
Distance(
p,
Type<Span<const int8_t>>(L::Partial(0, 0, 0).Slice<int8_t>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<const int32_t>>(L::Partial(0, 0, 0).Slice<int32_t>(p))
.data()));
EXPECT_EQ(0, Distance(p, Type<Span<const Int128>>(
L::Partial(0, 0, 0).Slice<Int128>(p))
.data()));
EXPECT_EQ(
0,
Distance(
p,
Type<Span<const int8_t>>(L::Partial(1, 0, 0).Slice<int8_t>(p)).data()));
EXPECT_EQ(
4,
Distance(p, Type<Span<const int32_t>>(L::Partial(1, 0, 0).Slice<int32_t>(p))
.data()));
EXPECT_EQ(8, Distance(p, Type<Span<const Int128>>(
L::Partial(1, 0, 0).Slice<Int128>(p))
.data()));
EXPECT_EQ(
0,
Distance(
p,
Type<Span<const int8_t>>(L::Partial(5, 3, 1).Slice<int8_t>(p)).data()));
EXPECT_EQ(24, Distance(p, Type<Span<const Int128>>(
L::Partial(5, 3, 1).Slice<Int128>(p))
.data()));
EXPECT_EQ(
8,
Distance(p, Type<Span<const int32_t>>(L::Partial(5, 3, 1).Slice<int32_t>(p))
.data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<const int8_t>>(L(5, 3, 1).Slice<int8_t>(p)).data()));
EXPECT_EQ(
24,
Distance(p,
Type<Span<const Int128>>(L(5, 3, 1).Slice<Int128>(p)).data()));
EXPECT_EQ(
8, Distance(
p, Type<Span<const int32_t>>(L(5, 3, 1).Slice<int32_t>(p)).data()));
}
}
TEST(Layout, MutableSliceByIndexData) {
alignas(max_align_t) unsigned char p[100];
{
using L = Layout<int32_t>;
EXPECT_EQ(0,
Distance(p, Type<Span<int32_t>>(L::Partial(0).Slice<0>(p)).data()));
EXPECT_EQ(0,
Distance(p, Type<Span<int32_t>>(L::Partial(3).Slice<0>(p)).data()));
EXPECT_EQ(0, Distance(p, Type<Span<int32_t>>(L(3).Slice<0>(p)).data()));
}
{
using L = Layout<int32_t, int32_t>;
EXPECT_EQ(0,
Distance(p, Type<Span<int32_t>>(L::Partial(3).Slice<0>(p)).data()));
EXPECT_EQ(
0, Distance(p, Type<Span<int32_t>>(L::Partial(3, 5).Slice<0>(p)).data()));
EXPECT_EQ(
12,
Distance(p, Type<Span<int32_t>>(L::Partial(3, 5).Slice<1>(p)).data()));
EXPECT_EQ(0, Distance(p, Type<Span<int32_t>>(L(3, 5).Slice<0>(p)).data()));
EXPECT_EQ(12, Distance(p, Type<Span<int32_t>>(L(3, 5).Slice<1>(p)).data()));
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(0,
Distance(p, Type<Span<int8_t>>(L::Partial(0).Slice<0>(p)).data()));
EXPECT_EQ(0,
Distance(p, Type<Span<int8_t>>(L::Partial(1).Slice<0>(p)).data()));
EXPECT_EQ(0,
Distance(p, Type<Span<int8_t>>(L::Partial(5).Slice<0>(p)).data()));
EXPECT_EQ(
0, Distance(p, Type<Span<int8_t>>(L::Partial(0, 0).Slice<0>(p)).data()));
EXPECT_EQ(
0, Distance(p, Type<Span<int32_t>>(L::Partial(0, 0).Slice<1>(p)).data()));
EXPECT_EQ(
0, Distance(p, Type<Span<int8_t>>(L::Partial(1, 0).Slice<0>(p)).data()));
EXPECT_EQ(
4, Distance(p, Type<Span<int32_t>>(L::Partial(1, 0).Slice<1>(p)).data()));
EXPECT_EQ(
0, Distance(p, Type<Span<int8_t>>(L::Partial(5, 3).Slice<0>(p)).data()));
EXPECT_EQ(
8, Distance(p, Type<Span<int32_t>>(L::Partial(5, 3).Slice<1>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<int8_t>>(L::Partial(0, 0, 0).Slice<0>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<int32_t>>(L::Partial(0, 0, 0).Slice<1>(p)).data()));
EXPECT_EQ(
0, Distance(
p, Type<Span<Int128>>(L::Partial(0, 0, 0).Slice<2>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<int8_t>>(L::Partial(1, 0, 0).Slice<0>(p)).data()));
EXPECT_EQ(
4,
Distance(p, Type<Span<int32_t>>(L::Partial(1, 0, 0).Slice<1>(p)).data()));
EXPECT_EQ(
8, Distance(
p, Type<Span<Int128>>(L::Partial(1, 0, 0).Slice<2>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<int8_t>>(L::Partial(5, 3, 1).Slice<0>(p)).data()));
EXPECT_EQ(
24, Distance(
p, Type<Span<Int128>>(L::Partial(5, 3, 1).Slice<2>(p)).data()));
EXPECT_EQ(
8,
Distance(p, Type<Span<int32_t>>(L::Partial(5, 3, 1).Slice<1>(p)).data()));
EXPECT_EQ(0, Distance(p, Type<Span<int8_t>>(L(5, 3, 1).Slice<0>(p)).data()));
EXPECT_EQ(24,
Distance(p, Type<Span<Int128>>(L(5, 3, 1).Slice<2>(p)).data()));
EXPECT_EQ(8, Distance(p, Type<Span<int32_t>>(L(5, 3, 1).Slice<1>(p)).data()));
}
}
TEST(Layout, MutableSliceByTypeData) {
alignas(max_align_t) unsigned char p[100];
{
using L = Layout<int32_t>;
EXPECT_EQ(
0,
Distance(p, Type<Span<int32_t>>(L::Partial(0).Slice<int32_t>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<int32_t>>(L::Partial(3).Slice<int32_t>(p)).data()));
EXPECT_EQ(0, Distance(p, Type<Span<int32_t>>(L(3).Slice<int32_t>(p)).data()));
}
{
using L = Layout<int8_t, int32_t, Int128>;
EXPECT_EQ(
0, Distance(p, Type<Span<int8_t>>(L::Partial(0).Slice<int8_t>(p)).data()));
EXPECT_EQ(
0, Distance(p, Type<Span<int8_t>>(L::Partial(1).Slice<int8_t>(p)).data()));
EXPECT_EQ(
0, Distance(p, Type<Span<int8_t>>(L::Partial(5).Slice<int8_t>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<int8_t>>(L::Partial(0, 0).Slice<int8_t>(p)).data()));
EXPECT_EQ(
0, Distance(
p, Type<Span<int32_t>>(L::Partial(0, 0).Slice<int32_t>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<int8_t>>(L::Partial(1, 0).Slice<int8_t>(p)).data()));
EXPECT_EQ(
4, Distance(
p, Type<Span<int32_t>>(L::Partial(1, 0).Slice<int32_t>(p)).data()));
EXPECT_EQ(
0,
Distance(p, Type<Span<int8_t>>(L::Partial(5, 3).Slice<int8_t>(p)).data()));
EXPECT_EQ(
8, Distance(
p, Type<Span<int32_t>>(L::Partial(5, 3).Slice<int32_t>(p)).data()));
EXPECT_EQ(
0, Distance(
p, Type<Span<int8_t>>(L::Partial(0, 0, 0).Slice<int8_t>(p)).data()));
EXPECT_EQ(
0,
Distance(
p, Type<Span<int32_t>>(L::Partial(0, 0, 0).Slice<int32_t>(p)).data()));
EXPECT_EQ(
0,
Distance(
p,
Type<Span<Int128>>(L::Partial(0, 0, 0).Slice<Int128>(p)).data()));
EXPECT_EQ(
0, Distance(
p, Type<Span<int8_t>>(L::Partial(1, 0, 0).Slice<int8_t>(p)).data()));
EXPECT_EQ(
4,
Distance(
p, Type<Span<int32_t>>(L::Partial(1, 0, 0).Slice<int32_t>(p)).data()));
EXPECT_EQ(
8,
Distance(
p,
Type<Span<Int128>>(L::Partial(1, 0, 0).Slice<Int128>(p)).data()));
EXPECT_EQ(
0, Distance(
p, Type<Span<int8_t>>(L::Partial(5, 3, 1).Slice<int8_t>(p)).data()));
EXPECT_EQ(
24,
Distance(
p,
Type<Span<Int128>>(L::Partial(5, 3, 1).Slice<Int128>(p)).data()));
EXPECT_EQ(
8,
Distance(
p, Type<Span<int32_t>>(L::Partial(5, 3, 1).Slice<int32_t>(p)).data()));
EXPECT_EQ(0,
Distance(p, Type<Span<int8_t>>(L(5, 3, 1).Slice<int8_t>(p)).data()));
EXPECT_EQ(
24,
Distance(p, Type<Span<Int128>>(L(5, 3, 1).Slice<Int128>(p)).data()));
EXPECT_EQ(
8, Distance(p, Type<Span<int32_t>>(L(5, 3, 1).Slice<int32_t>(p)).data()));
}
}
MATCHER_P(IsSameSlice, slice, "") {
return arg.size() == slice.size() && arg.data() == slice.data();
}
template <typename... M>
class TupleMatcher {
public:
explicit TupleMatcher(M... matchers) : matchers_(std::move(matchers)...) {}
template <typename Tuple>
bool MatchAndExplain(const Tuple& p,
testing::MatchResultListener* /* listener */) const {
static_assert(std::tuple_size<Tuple>::value == sizeof...(M), "");
return MatchAndExplainImpl(
p, absl::make_index_sequence<std::tuple_size<Tuple>::value>{});
}
// For the matcher concept. Left empty as we don't really need the diagnostics
// right now.
void DescribeTo(::std::ostream* os) const {}
void DescribeNegationTo(::std::ostream* os) const {}
private:
template <typename Tuple, size_t... Is>
bool MatchAndExplainImpl(const Tuple& p, absl::index_sequence<Is...>) const {
// Using std::min as a simple variadic "and".
return std::min(
{true, testing::SafeMatcherCast<
const typename std::tuple_element<Is, Tuple>::type&>(
std::get<Is>(matchers_))
.Matches(std::get<Is>(p))...});
}
std::tuple<M...> matchers_;
};
template <typename... M>
testing::PolymorphicMatcher<TupleMatcher<M...>> Tuple(M... matchers) {
return testing::MakePolymorphicMatcher(
TupleMatcher<M...>(std::move(matchers)...));
}
TEST(Layout, Slices) {
alignas(max_align_t) const unsigned char p[100] = {};
using L = Layout<int8_t, int8_t, Int128>;
{
const auto x = L::Partial();
EXPECT_THAT(Type<std::tuple<>>(x.Slices(p)), Tuple());
}
{
const auto x = L::Partial(1);
EXPECT_THAT(Type<std::tuple<Span<const int8_t>>>(x.Slices(p)),
Tuple(IsSameSlice(x.Slice<0>(p))));
}
{
const auto x = L::Partial(1, 2);
EXPECT_THAT(
(Type<std::tuple<Span<const int8_t>, Span<const int8_t>>>(x.Slices(p))),
Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p))));
}
{
const auto x = L::Partial(1, 2, 3);
EXPECT_THAT((Type<std::tuple<Span<const int8_t>, Span<const int8_t>,
Span<const Int128>>>(x.Slices(p))),
Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p)),
IsSameSlice(x.Slice<2>(p))));
}
{
const L x(1, 2, 3);
EXPECT_THAT((Type<std::tuple<Span<const int8_t>, Span<const int8_t>,
Span<const Int128>>>(x.Slices(p))),
Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p)),
IsSameSlice(x.Slice<2>(p))));
}
}
TEST(Layout, MutableSlices) {
alignas(max_align_t) unsigned char p[100] = {};
using L = Layout<int8_t, int8_t, Int128>;
{
const auto x = L::Partial();
EXPECT_THAT(Type<std::tuple<>>(x.Slices(p)), Tuple());
}
{
const auto x = L::Partial(1);
EXPECT_THAT(Type<std::tuple<Span<int8_t>>>(x.Slices(p)),
Tuple(IsSameSlice(x.Slice<0>(p))));
}
{
const auto x = L::Partial(1, 2);
EXPECT_THAT((Type<std::tuple<Span<int8_t>, Span<int8_t>>>(x.Slices(p))),
Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p))));
}
{
const auto x = L::Partial(1, 2, 3);
EXPECT_THAT(
(Type<std::tuple<Span<int8_t>, Span<int8_t>, Span<Int128>>>(x.Slices(p))),
Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p)),
IsSameSlice(x.Slice<2>(p))));
}
{
const L x(1, 2, 3);
EXPECT_THAT(
(Type<std::tuple<Span<int8_t>, Span<int8_t>, Span<Int128>>>(x.Slices(p))),
Tuple(IsSameSlice(x.Slice<0>(p)), IsSameSlice(x.Slice<1>(p)),
IsSameSlice(x.Slice<2>(p))));
}
}
TEST(Layout, UnalignedTypes) {
constexpr Layout<unsigned char, unsigned char, unsigned char> x(1, 2, 3);
alignas(max_align_t) unsigned char p[x.AllocSize() + 1];
EXPECT_THAT(x.Pointers(p + 1), Tuple(p + 1, p + 2, p + 4));
}
TEST(Layout, CustomAlignment) {
constexpr Layout<unsigned char, Aligned<unsigned char, 8>> x(1, 2);
alignas(max_align_t) unsigned char p[x.AllocSize()];
EXPECT_EQ(10, x.AllocSize());
EXPECT_THAT(x.Pointers(p), Tuple(p + 0, p + 8));
}
TEST(Layout, OverAligned) {
constexpr size_t M = alignof(max_align_t);
constexpr Layout<unsigned char, Aligned<unsigned char, 2 * M>> x(1, 3);
alignas(2 * M) unsigned char p[x.AllocSize()];
EXPECT_EQ(2 * M + 3, x.AllocSize());
EXPECT_THAT(x.Pointers(p), Tuple(p + 0, p + 2 * M));
}
TEST(Layout, Alignment) {
static_assert(Layout<int8_t>::Alignment() == 1, "");
static_assert(Layout<int32_t>::Alignment() == 4, "");
static_assert(Layout<Int64>::Alignment() == 8, "");
static_assert(Layout<Aligned<int8_t, 64>>::Alignment() == 64, "");
static_assert(Layout<int8_t, int32_t, Int64>::Alignment() == 8, "");
static_assert(Layout<int8_t, Int64, int32_t>::Alignment() == 8, "");
static_assert(Layout<int32_t, int8_t, Int64>::Alignment() == 8, "");
static_assert(Layout<int32_t, Int64, int8_t>::Alignment() == 8, "");
static_assert(Layout<Int64, int8_t, int32_t>::Alignment() == 8, "");
static_assert(Layout<Int64, int32_t, int8_t>::Alignment() == 8, "");
}
TEST(Layout, ConstexprPartial) {
constexpr size_t M = alignof(max_align_t);
constexpr Layout<unsigned char, Aligned<unsigned char, 2 * M>> x(1, 3);
static_assert(x.Partial(1).template Offset<1>() == 2 * M, "");
}
// [from, to)
struct Region {
size_t from;
size_t to;
};
void ExpectRegionPoisoned(const unsigned char* p, size_t n, bool poisoned) {
#ifdef ADDRESS_SANITIZER
for (size_t i = 0; i != n; ++i) {
EXPECT_EQ(poisoned, __asan_address_is_poisoned(p + i));
}
#endif
}
template <size_t N>
void ExpectPoisoned(const unsigned char (&buf)[N],
std::initializer_list<Region> reg) {
size_t prev = 0;
for (const Region& r : reg) {
ExpectRegionPoisoned(buf + prev, r.from - prev, false);
ExpectRegionPoisoned(buf + r.from, r.to - r.from, true);
prev = r.to;
}
ExpectRegionPoisoned(buf + prev, N - prev, false);
}
TEST(Layout, PoisonPadding) {
using L = Layout<int8_t, Int64, int32_t, Int128>;
constexpr size_t n = L::Partial(1, 2, 3, 4).AllocSize();
{
constexpr auto x = L::Partial();
alignas(max_align_t) const unsigned char c[n] = {};
x.PoisonPadding(c);
EXPECT_EQ(x.Slices(c), x.Slices(c));
ExpectPoisoned(c, {});
}
{
constexpr auto x = L::Partial(1);
alignas(max_align_t) const unsigned char c[n] = {};
x.PoisonPadding(c);
EXPECT_EQ(x.Slices(c), x.Slices(c));
ExpectPoisoned(c, {{1, 8}});
}
{
constexpr auto x = L::Partial(1, 2);
alignas(max_align_t) const unsigned char c[n] = {};
x.PoisonPadding(c);
EXPECT_EQ(x.Slices(c), x.Slices(c));
ExpectPoisoned(c, {{1, 8}});
}
{
constexpr auto x = L::Partial(1, 2, 3);
alignas(max_align_t) const unsigned char c[n] = {};
x.PoisonPadding(c);
EXPECT_EQ(x.Slices(c), x.Slices(c));
ExpectPoisoned(c, {{1, 8}, {36, 40}});
}
{
constexpr auto x = L::Partial(1, 2, 3, 4);
alignas(max_align_t) const unsigned char c[n] = {};
x.PoisonPadding(c);
EXPECT_EQ(x.Slices(c), x.Slices(c));
ExpectPoisoned(c, {{1, 8}, {36, 40}});
}
{
constexpr L x(1, 2, 3, 4);
alignas(max_align_t) const unsigned char c[n] = {};
x.PoisonPadding(c);
EXPECT_EQ(x.Slices(c), x.Slices(c));
ExpectPoisoned(c, {{1, 8}, {36, 40}});
}
}
TEST(Layout, DebugString) {
{
constexpr auto x = Layout<int8_t, int32_t, int8_t, Int128>::Partial();
EXPECT_EQ("@0<signed char>(1)", x.DebugString());
}
{
constexpr auto x = Layout<int8_t, int32_t, int8_t, Int128>::Partial(1);
EXPECT_EQ("@0<signed char>(1)[1]; @4<int>(4)", x.DebugString());
}
{
constexpr auto x = Layout<int8_t, int32_t, int8_t, Int128>::Partial(1, 2);
EXPECT_EQ("@0<signed char>(1)[1]; @4<int>(4)[2]; @12<signed char>(1)",
x.DebugString());
}
{
constexpr auto x = Layout<int8_t, int32_t, int8_t, Int128>::Partial(1, 2, 3);
EXPECT_EQ(
"@0<signed char>(1)[1]; @4<int>(4)[2]; @12<signed char>(1)[3]; "
"@16" +
Int128::Name() + "(16)",
x.DebugString());
}
{
constexpr auto x = Layout<int8_t, int32_t, int8_t, Int128>::Partial(1, 2, 3, 4);
EXPECT_EQ(
"@0<signed char>(1)[1]; @4<int>(4)[2]; @12<signed char>(1)[3]; "
"@16" +
Int128::Name() + "(16)[4]",
x.DebugString());
}
{
constexpr Layout<int8_t, int32_t, int8_t, Int128> x(1, 2, 3, 4);
EXPECT_EQ(
"@0<signed char>(1)[1]; @4<int>(4)[2]; @12<signed char>(1)[3]; "
"@16" +
Int128::Name() + "(16)[4]",
x.DebugString());
}
}
TEST(Layout, CharTypes) {
constexpr Layout<int32_t> x(1);
alignas(max_align_t) char c[x.AllocSize()] = {};
alignas(max_align_t) unsigned char uc[x.AllocSize()] = {};
alignas(max_align_t) signed char sc[x.AllocSize()] = {};
alignas(max_align_t) const char cc[x.AllocSize()] = {};
alignas(max_align_t) const unsigned char cuc[x.AllocSize()] = {};
alignas(max_align_t) const signed char csc[x.AllocSize()] = {};
Type<int32_t*>(x.Pointer<0>(c));
Type<int32_t*>(x.Pointer<0>(uc));
Type<int32_t*>(x.Pointer<0>(sc));
Type<const int32_t*>(x.Pointer<0>(cc));
Type<const int32_t*>(x.Pointer<0>(cuc));
Type<const int32_t*>(x.Pointer<0>(csc));
Type<int32_t*>(x.Pointer<int32_t>(c));
Type<int32_t*>(x.Pointer<int32_t>(uc));
Type<int32_t*>(x.Pointer<int32_t>(sc));
Type<const int32_t*>(x.Pointer<int32_t>(cc));
Type<const int32_t*>(x.Pointer<int32_t>(cuc));
Type<const int32_t*>(x.Pointer<int32_t>(csc));
Type<std::tuple<int32_t*>>(x.Pointers(c));
Type<std::tuple<int32_t*>>(x.Pointers(uc));
Type<std::tuple<int32_t*>>(x.Pointers(sc));
Type<std::tuple<const int32_t*>>(x.Pointers(cc));
Type<std::tuple<const int32_t*>>(x.Pointers(cuc));
Type<std::tuple<const int32_t*>>(x.Pointers(csc));
Type<Span<int32_t>>(x.Slice<0>(c));
Type<Span<int32_t>>(x.Slice<0>(uc));
Type<Span<int32_t>>(x.Slice<0>(sc));
Type<Span<const int32_t>>(x.Slice<0>(cc));
Type<Span<const int32_t>>(x.Slice<0>(cuc));
Type<Span<const int32_t>>(x.Slice<0>(csc));
Type<std::tuple<Span<int32_t>>>(x.Slices(c));
Type<std::tuple<Span<int32_t>>>(x.Slices(uc));
Type<std::tuple<Span<int32_t>>>(x.Slices(sc));
Type<std::tuple<Span<const int32_t>>>(x.Slices(cc));
Type<std::tuple<Span<const int32_t>>>(x.Slices(cuc));
Type<std::tuple<Span<const int32_t>>>(x.Slices(csc));
}
TEST(Layout, ConstElementType) {
constexpr Layout<const int32_t> x(1);
alignas(int32_t) char c[x.AllocSize()] = {};
const char* cc = c;
const int32_t* p = reinterpret_cast<const int32_t*>(cc);
EXPECT_EQ(alignof(int32_t), x.Alignment());
EXPECT_EQ(0, x.Offset<0>());
EXPECT_EQ(0, x.Offset<const int32_t>());
EXPECT_THAT(x.Offsets(), ElementsAre(0));
EXPECT_EQ(1, x.Size<0>());
EXPECT_EQ(1, x.Size<const int32_t>());
EXPECT_THAT(x.Sizes(), ElementsAre(1));
EXPECT_EQ(sizeof(int32_t), x.AllocSize());
EXPECT_EQ(p, Type<const int32_t*>(x.Pointer<0>(c)));
EXPECT_EQ(p, Type<const int32_t*>(x.Pointer<0>(cc)));
EXPECT_EQ(p, Type<const int32_t*>(x.Pointer<const int32_t>(c)));
EXPECT_EQ(p, Type<const int32_t*>(x.Pointer<const int32_t>(cc)));
EXPECT_THAT(Type<std::tuple<const int32_t*>>(x.Pointers(c)), Tuple(p));
EXPECT_THAT(Type<std::tuple<const int32_t*>>(x.Pointers(cc)), Tuple(p));
EXPECT_THAT(Type<Span<const int32_t>>(x.Slice<0>(c)),
IsSameSlice(Span<const int32_t>(p, 1)));
EXPECT_THAT(Type<Span<const int32_t>>(x.Slice<0>(cc)),
IsSameSlice(Span<const int32_t>(p, 1)));
EXPECT_THAT(Type<Span<const int32_t>>(x.Slice<const int32_t>(c)),
IsSameSlice(Span<const int32_t>(p, 1)));
EXPECT_THAT(Type<Span<const int32_t>>(x.Slice<const int32_t>(cc)),
IsSameSlice(Span<const int32_t>(p, 1)));
EXPECT_THAT(Type<std::tuple<Span<const int32_t>>>(x.Slices(c)),
Tuple(IsSameSlice(Span<const int32_t>(p, 1))));
EXPECT_THAT(Type<std::tuple<Span<const int32_t>>>(x.Slices(cc)),
Tuple(IsSameSlice(Span<const int32_t>(p, 1))));
}
namespace example {
// Immutable move-only string with sizeof equal to sizeof(void*). The string
// size and the characters are kept in the same heap allocation.
class CompactString {
public:
CompactString(const char* s = "") { // NOLINT
const size_t size = strlen(s);
// size_t[1], followed by char[size + 1].
// This statement doesn't allocate memory.
const L layout(1, size + 1);
// AllocSize() tells us how much memory we need to allocate for all our
// data.
p_.reset(new unsigned char[layout.AllocSize()]);
// If running under ASAN, mark the padding bytes, if any, to catch memory
// errors.
layout.PoisonPadding(p_.get());
// Store the size in the allocation.
// Pointer<size_t>() is a synonym for Pointer<0>().
*layout.Pointer<size_t>(p_.get()) = size;
// Store the characters in the allocation.
memcpy(layout.Pointer<char>(p_.get()), s, size + 1);
}
size_t size() const {
// Equivalent to reinterpret_cast<size_t&>(*p).
return *L::Partial().Pointer<size_t>(p_.get());
}
const char* c_str() const {
// Equivalent to reinterpret_cast<char*>(p.get() + sizeof(size_t)).
// The argument in Partial(1) specifies that we have size_t[1] in front of
// the characters.
return L::Partial(1).Pointer<char>(p_.get());
}
private:
// Our heap allocation contains a size_t followed by an array of chars.
using L = Layout<size_t, char>;
std::unique_ptr<unsigned char[]> p_;
};
TEST(CompactString, Works) {
CompactString s = "hello";
EXPECT_EQ(5, s.size());
EXPECT_STREQ("hello", s.c_str());
}
} // namespace example
} // namespace
} // namespace container_internal
} // namespace absl