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diff --git a/absl/container/internal/layout_test.cc b/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;
+}
+
+using Int128 = int64_t[2];
+
+// 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(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_t>::Alignment() == 8, "");
+ static_assert(Layout<Aligned<int8_t, 64>>::Alignment() == 64, "");
+ static_assert(Layout<int8_t, int32_t, int64_t>::Alignment() == 8, "");
+ static_assert(Layout<int8_t, int64_t, int32_t>::Alignment() == 8, "");
+ static_assert(Layout<int32_t, int8_t, int64_t>::Alignment() == 8, "");
+ static_assert(Layout<int32_t, int64_t, int8_t>::Alignment() == 8, "");
+ static_assert(Layout<int64_t, int8_t, int32_t>::Alignment() == 8, "");
+ static_assert(Layout<int64_t, 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_t, 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) {
+ const std::string int64_type =
+#ifdef _MSC_VER
+ "__int64";
+#else // _MSC_VER
+ std::is_same<int64_t, long long>::value ? "long long" : "long"; // NOLINT
+#endif // _MSC_VER
+ {
+ 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<" +
+ int64_type + " [2]>(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<" +
+ int64_type + " [2]>(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<" +
+ int64_type + " [2]>(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
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 00:23:13 +0000