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-rw-r--r--absl/base/config.h28
-rw-r--r--absl/container/BUILD.bazel26
-rw-r--r--absl/container/btree_benchmark.cc707
-rw-r--r--absl/container/internal/raw_hash_set.h15
-rw-r--r--absl/flags/marshalling.h6
-rw-r--r--absl/strings/internal/str_format/extension.h3
-rw-r--r--absl/strings/numbers.cc52
-rw-r--r--absl/time/internal/cctz/src/zone_info_source.cc40
-rw-r--r--absl/time/time.h76
-rw-r--r--absl/types/compare.h40
-rw-r--r--absl/types/compare_test.cc92
11 files changed, 1025 insertions, 60 deletions
diff --git a/absl/base/config.h b/absl/base/config.h
index edbf224..c4e8dce 100644
--- a/absl/base/config.h
+++ b/absl/base/config.h
@@ -66,6 +66,10 @@
#include "absl/base/options.h"
#include "absl/base/policy_checks.h"
+// Helper macro to convert a CPP variable to a string literal.
+#define ABSL_INTERNAL_DO_TOKEN_STR(x) #x
+#define ABSL_INTERNAL_TOKEN_STR(x) ABSL_INTERNAL_DO_TOKEN_STR(x)
+
// -----------------------------------------------------------------------------
// Abseil namespace annotations
// -----------------------------------------------------------------------------
@@ -98,8 +102,6 @@
// Check that ABSL_OPTION_INLINE_NAMESPACE_NAME is neither "head" nor ""
#if defined(__cplusplus) && ABSL_OPTION_USE_INLINE_NAMESPACE == 1
-#define ABSL_INTERNAL_DO_TOKEN_STR(x) #x
-#define ABSL_INTERNAL_TOKEN_STR(x) ABSL_INTERNAL_DO_TOKEN_STR(x)
#define ABSL_INTERNAL_INLINE_NAMESPACE_STR \
ABSL_INTERNAL_TOKEN_STR(ABSL_OPTION_INLINE_NAMESPACE_NAME)
@@ -617,6 +619,28 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
#define ABSL_INTERNAL_MSVC_2017_DBG_MODE
#endif
+// ABSL_INTERNAL_MANGLED_NS
+// ABSL_INTERNAL_MANGLED_BACKREFERENCE
+//
+// Internal macros for building up mangled names in our internal fork of CCTZ.
+// This implementation detail is only needed and provided for the MSVC build.
+//
+// These macros both expand to string literals. ABSL_INTERNAL_MANGLED_NS is
+// the mangled spelling of the `absl` namespace, and
+// ABSL_INTERNAL_MANGLED_BACKREFERENCE is a back-reference integer representing
+// the proper count to skip past the CCTZ fork namespace names. (This number
+// is one larger when there is an inline namespace name to skip.)
+#if defined(_MSC_VER)
+#if ABSL_OPTION_USE_INLINE_NAMESPACE == 0
+#define ABSL_INTERNAL_MANGLED_NS "absl"
+#define ABSL_INTERNAL_MANGLED_BACKREFERENCE "5"
+#else
+#define ABSL_INTERNAL_MANGLED_NS \
+ ABSL_INTERNAL_TOKEN_STR(ABSL_OPTION_INLINE_NAMESPACE_NAME) "@absl"
+#define ABSL_INTERNAL_MANGLED_BACKREFERENCE "6"
+#endif
+#endif
+
#undef ABSL_INTERNAL_HAS_KEYWORD
#endif // ABSL_BASE_CONFIG_H_
diff --git a/absl/container/BUILD.bazel b/absl/container/BUILD.bazel
index 1f7abe0..f221714 100644
--- a/absl/container/BUILD.bazel
+++ b/absl/container/BUILD.bazel
@@ -874,3 +874,29 @@ cc_test(
"@com_google_googletest//:gtest_main",
],
)
+
+cc_binary(
+ name = "btree_benchmark",
+ testonly = 1,
+ srcs = [
+ "btree_benchmark.cc",
+ ],
+ copts = ABSL_TEST_COPTS,
+ linkopts = ABSL_DEFAULT_LINKOPTS,
+ tags = ["benchmark"],
+ visibility = ["//visibility:private"],
+ deps = [
+ ":btree",
+ ":btree_test_common",
+ ":flat_hash_map",
+ ":flat_hash_set",
+ ":hashtable_debug",
+ "//absl/base:raw_logging_internal",
+ "//absl/flags:flag",
+ "//absl/hash",
+ "//absl/memory",
+ "//absl/strings:str_format",
+ "//absl/time",
+ "@com_github_google_benchmark//:benchmark_main",
+ ],
+)
diff --git a/absl/container/btree_benchmark.cc b/absl/container/btree_benchmark.cc
new file mode 100644
index 0000000..4af92f9
--- /dev/null
+++ b/absl/container/btree_benchmark.cc
@@ -0,0 +1,707 @@
+// 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
+//
+// https://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 <stdint.h>
+
+#include <algorithm>
+#include <functional>
+#include <map>
+#include <numeric>
+#include <random>
+#include <set>
+#include <string>
+#include <type_traits>
+#include <unordered_map>
+#include <unordered_set>
+#include <vector>
+
+#include "absl/base/internal/raw_logging.h"
+#include "absl/container/btree_map.h"
+#include "absl/container/btree_set.h"
+#include "absl/container/btree_test.h"
+#include "absl/container/flat_hash_map.h"
+#include "absl/container/flat_hash_set.h"
+#include "absl/container/internal/hashtable_debug.h"
+#include "absl/flags/flag.h"
+#include "absl/hash/hash.h"
+#include "absl/memory/memory.h"
+#include "absl/strings/str_format.h"
+#include "absl/time/time.h"
+#include "benchmark/benchmark.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace container_internal {
+namespace {
+
+constexpr size_t kBenchmarkValues = 1 << 20;
+
+// How many times we add and remove sub-batches in one batch of *AddRem
+// benchmarks.
+constexpr size_t kAddRemBatchSize = 1 << 2;
+
+// Generates n values in the range [0, 4 * n].
+template <typename V>
+std::vector<V> GenerateValues(int n) {
+ constexpr int kSeed = 23;
+ return GenerateValuesWithSeed<V>(n, 4 * n, kSeed);
+}
+
+// Benchmark insertion of values into a container.
+template <typename T>
+void BM_InsertImpl(benchmark::State& state, bool sorted) {
+ using V = typename remove_pair_const<typename T::value_type>::type;
+ typename KeyOfValue<typename T::key_type, V>::type key_of_value;
+
+ std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
+ if (sorted) {
+ std::sort(values.begin(), values.end());
+ }
+ T container(values.begin(), values.end());
+
+ // Remove and re-insert 10% of the keys per batch.
+ const int batch_size = (kBenchmarkValues + 9) / 10;
+ while (state.KeepRunningBatch(batch_size)) {
+ state.PauseTiming();
+ const auto i = static_cast<int>(state.iterations());
+
+ for (int j = i; j < i + batch_size; j++) {
+ int x = j % kBenchmarkValues;
+ container.erase(key_of_value(values[x]));
+ }
+
+ state.ResumeTiming();
+
+ for (int j = i; j < i + batch_size; j++) {
+ int x = j % kBenchmarkValues;
+ container.insert(values[x]);
+ }
+ }
+}
+
+template <typename T>
+void BM_Insert(benchmark::State& state) {
+ BM_InsertImpl<T>(state, false);
+}
+
+template <typename T>
+void BM_InsertSorted(benchmark::State& state) {
+ BM_InsertImpl<T>(state, true);
+}
+
+// container::insert sometimes returns a pair<iterator, bool> and sometimes
+// returns an iterator (for multi- containers).
+template <typename Iter>
+Iter GetIterFromInsert(const std::pair<Iter, bool>& pair) {
+ return pair.first;
+}
+template <typename Iter>
+Iter GetIterFromInsert(const Iter iter) {
+ return iter;
+}
+
+// Benchmark insertion of values into a container at the end.
+template <typename T>
+void BM_InsertEnd(benchmark::State& state) {
+ using V = typename remove_pair_const<typename T::value_type>::type;
+ typename KeyOfValue<typename T::key_type, V>::type key_of_value;
+
+ T container;
+ const int kSize = 10000;
+ for (int i = 0; i < kSize; ++i) {
+ container.insert(Generator<V>(kSize)(i));
+ }
+ V v = Generator<V>(kSize)(kSize - 1);
+ typename T::key_type k = key_of_value(v);
+
+ auto it = container.find(k);
+ while (state.KeepRunning()) {
+ // Repeatedly removing then adding v.
+ container.erase(it);
+ it = GetIterFromInsert(container.insert(v));
+ }
+}
+
+template <typename T>
+void BM_LookupImpl(benchmark::State& state, bool sorted) {
+ using V = typename remove_pair_const<typename T::value_type>::type;
+ typename KeyOfValue<typename T::key_type, V>::type key_of_value;
+
+ std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
+ if (sorted) {
+ std::sort(values.begin(), values.end());
+ }
+ T container(values.begin(), values.end());
+
+ while (state.KeepRunning()) {
+ int idx = state.iterations() % kBenchmarkValues;
+ benchmark::DoNotOptimize(container.find(key_of_value(values[idx])));
+ }
+}
+
+// Benchmark lookup of values in a container.
+template <typename T>
+void BM_Lookup(benchmark::State& state) {
+ BM_LookupImpl<T>(state, false);
+}
+
+// Benchmark lookup of values in a full container, meaning that values
+// are inserted in-order to take advantage of biased insertion, which
+// yields a full tree.
+template <typename T>
+void BM_FullLookup(benchmark::State& state) {
+ BM_LookupImpl<T>(state, true);
+}
+
+// Benchmark deletion of values from a container.
+template <typename T>
+void BM_Delete(benchmark::State& state) {
+ using V = typename remove_pair_const<typename T::value_type>::type;
+ typename KeyOfValue<typename T::key_type, V>::type key_of_value;
+ std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
+ T container(values.begin(), values.end());
+
+ // Remove and re-insert 10% of the keys per batch.
+ const int batch_size = (kBenchmarkValues + 9) / 10;
+ while (state.KeepRunningBatch(batch_size)) {
+ const int i = state.iterations();
+
+ for (int j = i; j < i + batch_size; j++) {
+ int x = j % kBenchmarkValues;
+ container.erase(key_of_value(values[x]));
+ }
+
+ state.PauseTiming();
+ for (int j = i; j < i + batch_size; j++) {
+ int x = j % kBenchmarkValues;
+ container.insert(values[x]);
+ }
+ state.ResumeTiming();
+ }
+}
+
+// Benchmark deletion of multiple values from a container.
+template <typename T>
+void BM_DeleteRange(benchmark::State& state) {
+ using V = typename remove_pair_const<typename T::value_type>::type;
+ typename KeyOfValue<typename T::key_type, V>::type key_of_value;
+ std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
+ T container(values.begin(), values.end());
+
+ // Remove and re-insert 10% of the keys per batch.
+ const int batch_size = (kBenchmarkValues + 9) / 10;
+ while (state.KeepRunningBatch(batch_size)) {
+ const int i = state.iterations();
+
+ const int start_index = i % kBenchmarkValues;
+
+ state.PauseTiming();
+ {
+ std::vector<V> removed;
+ removed.reserve(batch_size);
+ auto itr = container.find(key_of_value(values[start_index]));
+ auto start = itr;
+ for (int j = 0; j < batch_size; j++) {
+ if (itr == container.end()) {
+ state.ResumeTiming();
+ container.erase(start, itr);
+ state.PauseTiming();
+ itr = container.begin();
+ start = itr;
+ }
+ removed.push_back(*itr++);
+ }
+
+ state.ResumeTiming();
+ container.erase(start, itr);
+ state.PauseTiming();
+
+ container.insert(removed.begin(), removed.end());
+ }
+ state.ResumeTiming();
+ }
+}
+
+// Benchmark steady-state insert (into first half of range) and remove (from
+// second half of range), treating the container approximately like a queue with
+// log-time access for all elements. This benchmark does not test the case where
+// insertion and removal happen in the same region of the tree. This benchmark
+// counts two value constructors.
+template <typename T>
+void BM_QueueAddRem(benchmark::State& state) {
+ using V = typename remove_pair_const<typename T::value_type>::type;
+ typename KeyOfValue<typename T::key_type, V>::type key_of_value;
+
+ ABSL_RAW_CHECK(kBenchmarkValues % 2 == 0, "for performance");
+
+ T container;
+
+ const size_t half = kBenchmarkValues / 2;
+ std::vector<int> remove_keys(half);
+ std::vector<int> add_keys(half);
+
+ // We want to do the exact same work repeatedly, and the benchmark can end
+ // after a different number of iterations depending on the speed of the
+ // individual run so we use a large batch size here and ensure that we do
+ // deterministic work every batch.
+ while (state.KeepRunningBatch(half * kAddRemBatchSize)) {
+ state.PauseTiming();
+
+ container.clear();
+
+ for (size_t i = 0; i < half; ++i) {
+ remove_keys[i] = i;
+ add_keys[i] = i;
+ }
+ constexpr int kSeed = 5;
+ std::mt19937_64 rand(kSeed);
+ std::shuffle(remove_keys.begin(), remove_keys.end(), rand);
+ std::shuffle(add_keys.begin(), add_keys.end(), rand);
+
+ // Note needs lazy generation of values.
+ Generator<V> g(kBenchmarkValues * kAddRemBatchSize);
+
+ for (size_t i = 0; i < half; ++i) {
+ container.insert(g(add_keys[i]));
+ container.insert(g(half + remove_keys[i]));
+ }
+
+ // There are three parts each of size "half":
+ // 1 is being deleted from [offset - half, offset)
+ // 2 is standing [offset, offset + half)
+ // 3 is being inserted into [offset + half, offset + 2 * half)
+ size_t offset = 0;
+
+ for (size_t i = 0; i < kAddRemBatchSize; ++i) {
+ std::shuffle(remove_keys.begin(), remove_keys.end(), rand);
+ std::shuffle(add_keys.begin(), add_keys.end(), rand);
+ offset += half;
+
+ state.ResumeTiming();
+ for (size_t idx = 0; idx < half; ++idx) {
+ container.erase(key_of_value(g(offset - half + remove_keys[idx])));
+ container.insert(g(offset + half + add_keys[idx]));
+ }
+ state.PauseTiming();
+ }
+ state.ResumeTiming();
+ }
+}
+
+// Mixed insertion and deletion in the same range using pre-constructed values.
+template <typename T>
+void BM_MixedAddRem(benchmark::State& state) {
+ using V = typename remove_pair_const<typename T::value_type>::type;
+ typename KeyOfValue<typename T::key_type, V>::type key_of_value;
+
+ ABSL_RAW_CHECK(kBenchmarkValues % 2 == 0, "for performance");
+
+ T container;
+
+ // Create two random shuffles
+ std::vector<int> remove_keys(kBenchmarkValues);
+ std::vector<int> add_keys(kBenchmarkValues);
+
+ // We want to do the exact same work repeatedly, and the benchmark can end
+ // after a different number of iterations depending on the speed of the
+ // individual run so we use a large batch size here and ensure that we do
+ // deterministic work every batch.
+ while (state.KeepRunningBatch(kBenchmarkValues * kAddRemBatchSize)) {
+ state.PauseTiming();
+
+ container.clear();
+
+ constexpr int kSeed = 7;
+ std::mt19937_64 rand(kSeed);
+
+ std::vector<V> values = GenerateValues<V>(kBenchmarkValues * 2);
+
+ // Insert the first half of the values (already in random order)
+ container.insert(values.begin(), values.begin() + kBenchmarkValues);
+
+ // Insert the first half of the values (already in random order)
+ for (size_t i = 0; i < kBenchmarkValues; ++i) {
+ // remove_keys and add_keys will be swapped before each round,
+ // therefore fill add_keys here w/ the keys being inserted, so
+ // they'll be the first to be removed.
+ remove_keys[i] = i + kBenchmarkValues;
+ add_keys[i] = i;
+ }
+
+ for (size_t i = 0; i < kAddRemBatchSize; ++i) {
+ remove_keys.swap(add_keys);
+ std::shuffle(remove_keys.begin(), remove_keys.end(), rand);
+ std::shuffle(add_keys.begin(), add_keys.end(), rand);
+
+ state.ResumeTiming();
+ for (size_t idx = 0; idx < kBenchmarkValues; ++idx) {
+ container.erase(key_of_value(values[remove_keys[idx]]));
+ container.insert(values[add_keys[idx]]);
+ }
+ state.PauseTiming();
+ }
+ state.ResumeTiming();
+ }
+}
+
+// Insertion at end, removal from the beginning. This benchmark
+// counts two value constructors.
+// TODO(ezb): we could add a GenerateNext version of generator that could reduce
+// noise for string-like types.
+template <typename T>
+void BM_Fifo(benchmark::State& state) {
+ using V = typename remove_pair_const<typename T::value_type>::type;
+
+ T container;
+ // Need lazy generation of values as state.max_iterations is large.
+ Generator<V> g(kBenchmarkValues + state.max_iterations);
+
+ for (int i = 0; i < kBenchmarkValues; i++) {
+ container.insert(g(i));
+ }
+
+ while (state.KeepRunning()) {
+ container.erase(container.begin());
+ container.insert(container.end(), g(state.iterations() + kBenchmarkValues));
+ }
+}
+
+// Iteration (forward) through the tree
+template <typename T>
+void BM_FwdIter(benchmark::State& state) {
+ using V = typename remove_pair_const<typename T::value_type>::type;
+ using R = typename T::value_type const*;
+
+ std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
+ T container(values.begin(), values.end());
+
+ auto iter = container.end();
+
+ R r = nullptr;
+
+ while (state.KeepRunning()) {
+ if (iter == container.end()) iter = container.begin();
+ r = &(*iter);
+ ++iter;
+ }
+
+ benchmark::DoNotOptimize(r);
+}
+
+// Benchmark random range-construction of a container.
+template <typename T>
+void BM_RangeConstructionImpl(benchmark::State& state, bool sorted) {
+ using V = typename remove_pair_const<typename T::value_type>::type;
+
+ std::vector<V> values = GenerateValues<V>(kBenchmarkValues);
+ if (sorted) {
+ std::sort(values.begin(), values.end());
+ }
+ {
+ T container(values.begin(), values.end());
+ }
+
+ while (state.KeepRunning()) {
+ T container(values.begin(), values.end());
+ benchmark::DoNotOptimize(container);
+ }
+}
+
+template <typename T>
+void BM_InsertRangeRandom(benchmark::State& state) {
+ BM_RangeConstructionImpl<T>(state, false);
+}
+
+template <typename T>
+void BM_InsertRangeSorted(benchmark::State& state) {
+ BM_RangeConstructionImpl<T>(state, true);
+}
+
+#define STL_ORDERED_TYPES(value) \
+ using stl_set_##value = std::set<value>; \
+ using stl_map_##value = std::map<value, intptr_t>; \
+ using stl_multiset_##value = std::multiset<value>; \
+ using stl_multimap_##value = std::multimap<value, intptr_t>
+
+using StdString = std::string;
+STL_ORDERED_TYPES(int32_t);
+STL_ORDERED_TYPES(int64_t);
+STL_ORDERED_TYPES(StdString);
+STL_ORDERED_TYPES(Time);
+
+#define STL_UNORDERED_TYPES(value) \
+ using stl_unordered_set_##value = std::unordered_set<value>; \
+ using stl_unordered_map_##value = std::unordered_map<value, intptr_t>; \
+ using flat_hash_set_##value = flat_hash_set<value>; \
+ using flat_hash_map_##value = flat_hash_map<value, intptr_t>; \
+ using stl_unordered_multiset_##value = std::unordered_multiset<value>; \
+ using stl_unordered_multimap_##value = \
+ std::unordered_multimap<value, intptr_t>
+
+#define STL_UNORDERED_TYPES_CUSTOM_HASH(value, hash) \
+ using stl_unordered_set_##value = std::unordered_set<value, hash>; \
+ using stl_unordered_map_##value = std::unordered_map<value, intptr_t, hash>; \
+ using flat_hash_set_##value = flat_hash_set<value, hash>; \
+ using flat_hash_map_##value = flat_hash_map<value, intptr_t, hash>; \
+ using stl_unordered_multiset_##value = std::unordered_multiset<value, hash>; \
+ using stl_unordered_multimap_##value = \
+ std::unordered_multimap<value, intptr_t, hash>
+
+STL_UNORDERED_TYPES(int32_t);
+STL_UNORDERED_TYPES(int64_t);
+STL_UNORDERED_TYPES(StdString);
+STL_UNORDERED_TYPES_CUSTOM_HASH(Time, absl::Hash<absl::Time>);
+
+#define BTREE_TYPES(value) \
+ using btree_256_set_##value = \
+ btree_set<value, std::less<value>, std::allocator<value>>; \
+ using btree_256_map_##value = \
+ btree_map<value, intptr_t, std::less<value>, \
+ std::allocator<std::pair<const value, intptr_t>>>; \
+ using btree_256_multiset_##value = \
+ btree_multiset<value, std::less<value>, std::allocator<value>>; \
+ using btree_256_multimap_##value = \
+ btree_multimap<value, intptr_t, std::less<value>, \
+ std::allocator<std::pair<const value, intptr_t>>>
+
+BTREE_TYPES(int32_t);
+BTREE_TYPES(int64_t);
+BTREE_TYPES(StdString);
+BTREE_TYPES(Time);
+
+#define MY_BENCHMARK4(type, func) \
+ void BM_##type##_##func(benchmark::State& state) { BM_##func<type>(state); } \
+ BENCHMARK(BM_##type##_##func)
+
+#define MY_BENCHMARK3(type) \
+ MY_BENCHMARK4(type, Insert); \
+ MY_BENCHMARK4(type, InsertSorted); \
+ MY_BENCHMARK4(type, InsertEnd); \
+ MY_BENCHMARK4(type, Lookup); \
+ MY_BENCHMARK4(type, FullLookup); \
+ MY_BENCHMARK4(type, Delete); \
+ MY_BENCHMARK4(type, DeleteRange); \
+ MY_BENCHMARK4(type, QueueAddRem); \
+ MY_BENCHMARK4(type, MixedAddRem); \
+ MY_BENCHMARK4(type, Fifo); \
+ MY_BENCHMARK4(type, FwdIter); \
+ MY_BENCHMARK4(type, InsertRangeRandom); \
+ MY_BENCHMARK4(type, InsertRangeSorted)
+
+#define MY_BENCHMARK2_SUPPORTS_MULTI_ONLY(type) \
+ MY_BENCHMARK3(stl_##type); \
+ MY_BENCHMARK3(stl_unordered_##type); \
+ MY_BENCHMARK3(btree_256_##type)
+
+#define MY_BENCHMARK2(type) \
+ MY_BENCHMARK2_SUPPORTS_MULTI_ONLY(type); \
+ MY_BENCHMARK3(flat_hash_##type)
+
+// Define MULTI_TESTING to see benchmarks for multi-containers also.
+//
+// You can use --copt=-DMULTI_TESTING.
+#ifdef MULTI_TESTING
+#define MY_BENCHMARK(type) \
+ MY_BENCHMARK2(set_##type); \
+ MY_BENCHMARK2(map_##type); \
+ MY_BENCHMARK2_SUPPORTS_MULTI_ONLY(multiset_##type); \
+ MY_BENCHMARK2_SUPPORTS_MULTI_ONLY(multimap_##type)
+#else
+#define MY_BENCHMARK(type) \
+ MY_BENCHMARK2(set_##type); \
+ MY_BENCHMARK2(map_##type)
+#endif
+
+MY_BENCHMARK(int32_t);
+MY_BENCHMARK(int64_t);
+MY_BENCHMARK(StdString);
+MY_BENCHMARK(Time);
+
+// Define a type whose size and cost of moving are independently customizable.
+// When sizeof(value_type) increases, we expect btree to no longer have as much
+// cache-locality advantage over STL. When cost of moving increases, we expect
+// btree to actually do more work than STL because it has to move values around
+// and STL doesn't have to.
+template <int Size, int Copies>
+struct BigType {
+ BigType() : BigType(0) {}
+ explicit BigType(int x) { std::iota(values.begin(), values.end(), x); }
+
+ void Copy(const BigType& x) {
+ for (int i = 0; i < Size && i < Copies; ++i) values[i] = x.values[i];
+ // If Copies > Size, do extra copies.
+ for (int i = Size, idx = 0; i < Copies; ++i) {
+ int64_t tmp = x.values[idx];
+ benchmark::DoNotOptimize(tmp);
+ idx = idx + 1 == Size ? 0 : idx + 1;
+ }
+ }
+
+ BigType(const BigType& x) { Copy(x); }
+ BigType& operator=(const BigType& x) {
+ Copy(x);
+ return *this;
+ }
+
+ // Compare only the first Copies elements if Copies is less than Size.
+ bool operator<(const BigType& other) const {
+ return std::lexicographical_compare(
+ values.begin(), values.begin() + std::min(Size, Copies),
+ other.values.begin(), other.values.begin() + std::min(Size, Copies));
+ }
+ bool operator==(const BigType& other) const {
+ return std::equal(values.begin(), values.begin() + std::min(Size, Copies),
+ other.values.begin());
+ }
+
+ // Support absl::Hash.
+ template <typename State>
+ friend State AbslHashValue(State h, const BigType& b) {
+ for (int i = 0; i < Size && i < Copies; ++i)
+ h = State::combine(std::move(h), b.values[i]);
+ return h;
+ }
+
+ std::array<int64_t, Size> values;
+};
+
+#define BIG_TYPE_BENCHMARKS(SIZE, COPIES) \
+ using stl_set_size##SIZE##copies##COPIES = std::set<BigType<SIZE, COPIES>>; \
+ using stl_map_size##SIZE##copies##COPIES = \
+ std::map<BigType<SIZE, COPIES>, intptr_t>; \
+ using stl_multiset_size##SIZE##copies##COPIES = \
+ std::multiset<BigType<SIZE, COPIES>>; \
+ using stl_multimap_size##SIZE##copies##COPIES = \
+ std::multimap<BigType<SIZE, COPIES>, intptr_t>; \
+ using stl_unordered_set_size##SIZE##copies##COPIES = \
+ std::unordered_set<BigType<SIZE, COPIES>, \
+ absl::Hash<BigType<SIZE, COPIES>>>; \
+ using stl_unordered_map_size##SIZE##copies##COPIES = \
+ std::unordered_map<BigType<SIZE, COPIES>, intptr_t, \
+ absl::Hash<BigType<SIZE, COPIES>>>; \
+ using flat_hash_set_size##SIZE##copies##COPIES = \
+ flat_hash_set<BigType<SIZE, COPIES>>; \
+ using flat_hash_map_size##SIZE##copies##COPIES = \
+ flat_hash_map<BigType<SIZE, COPIES>, intptr_t>; \
+ using stl_unordered_multiset_size##SIZE##copies##COPIES = \
+ std::unordered_multiset<BigType<SIZE, COPIES>, \
+ absl::Hash<BigType<SIZE, COPIES>>>; \
+ using stl_unordered_multimap_size##SIZE##copies##COPIES = \
+ std::unordered_multimap<BigType<SIZE, COPIES>, intptr_t, \
+ absl::Hash<BigType<SIZE, COPIES>>>; \
+ using btree_256_set_size##SIZE##copies##COPIES = \
+ btree_set<BigType<SIZE, COPIES>>; \
+ using btree_256_map_size##SIZE##copies##COPIES = \
+ btree_map<BigType<SIZE, COPIES>, intptr_t>; \
+ using btree_256_multiset_size##SIZE##copies##COPIES = \
+ btree_multiset<BigType<SIZE, COPIES>>; \
+ using btree_256_multimap_size##SIZE##copies##COPIES = \
+ btree_multimap<BigType<SIZE, COPIES>, intptr_t>; \
+ MY_BENCHMARK(size##SIZE##copies##COPIES)
+
+// Define BIG_TYPE_TESTING to see benchmarks for more big types.
+//
+// You can use --copt=-DBIG_TYPE_TESTING.
+#ifndef NODESIZE_TESTING
+#ifdef BIG_TYPE_TESTING
+BIG_TYPE_BENCHMARKS(1, 4);
+BIG_TYPE_BENCHMARKS(4, 1);
+BIG_TYPE_BENCHMARKS(4, 4);
+BIG_TYPE_BENCHMARKS(1, 8);
+BIG_TYPE_BENCHMARKS(8, 1);
+BIG_TYPE_BENCHMARKS(8, 8);
+BIG_TYPE_BENCHMARKS(1, 16);
+BIG_TYPE_BENCHMARKS(16, 1);
+BIG_TYPE_BENCHMARKS(16, 16);
+BIG_TYPE_BENCHMARKS(1, 32);
+BIG_TYPE_BENCHMARKS(32, 1);
+BIG_TYPE_BENCHMARKS(32, 32);
+#else
+BIG_TYPE_BENCHMARKS(32, 32);
+#endif
+#endif
+
+// Benchmark using unique_ptrs to large value types. In order to be able to use
+// the same benchmark code as the other types, use a type that holds a
+// unique_ptr and has a copy constructor.
+template <int Size>
+struct BigTypePtr {
+ BigTypePtr() : BigTypePtr(0) {}
+ explicit BigTypePtr(int x) {
+ ptr = absl::make_unique<BigType<Size, Size>>(x);
+ }
+ BigTypePtr(const BigTypePtr& x) {
+ ptr = absl::make_unique<BigType<Size, Size>>(*x.ptr);
+ }
+ BigTypePtr(BigTypePtr&& x) noexcept = default;
+ BigTypePtr& operator=(const BigTypePtr& x) {
+ ptr = absl::make_unique<BigType<Size, Size>>(*x.ptr);
+ }
+ BigTypePtr& operator=(BigTypePtr&& x) noexcept = default;
+
+ bool operator<(const BigTypePtr& other) const { return *ptr < *other.ptr; }
+ bool operator==(const BigTypePtr& other) const { return *ptr == *other.ptr; }
+
+ std::unique_ptr<BigType<Size, Size>> ptr;
+};
+
+template <int Size>
+double ContainerInfo(const btree_set<BigTypePtr<Size>>& b) {
+ const double bytes_used =
+ b.bytes_used() + b.size() * sizeof(BigType<Size, Size>);
+ const double bytes_per_value = bytes_used / b.size();
+ BtreeContainerInfoLog(b, bytes_used, bytes_per_value);
+ return bytes_per_value;
+}
+template <int Size>
+double ContainerInfo(const btree_map<int, BigTypePtr<Size>>& b) {
+ const double bytes_used =
+ b.bytes_used() + b.size() * sizeof(BigType<Size, Size>);
+ const double bytes_per_value = bytes_used / b.size();
+ BtreeContainerInfoLog(b, bytes_used, bytes_per_value);
+ return bytes_per_value;
+}
+
+#define BIG_TYPE_PTR_BENCHMARKS(SIZE) \
+ using stl_set_size##SIZE##copies##SIZE##ptr = std::set<BigType<SIZE, SIZE>>; \
+ using stl_map_size##SIZE##copies##SIZE##ptr = \
+ std::map<int, BigType<SIZE, SIZE>>; \
+ using stl_unordered_set_size##SIZE##copies##SIZE##ptr = \
+ std::unordered_set<BigType<SIZE, SIZE>, \
+ absl::Hash<BigType<SIZE, SIZE>>>; \
+ using stl_unordered_map_size##SIZE##copies##SIZE##ptr = \
+ std::unordered_map<int, BigType<SIZE, SIZE>>; \
+ using flat_hash_set_size##SIZE##copies##SIZE##ptr = \
+ flat_hash_set<BigType<SIZE, SIZE>>; \
+ using flat_hash_map_size##SIZE##copies##SIZE##ptr = \
+ flat_hash_map<int, BigTypePtr<SIZE>>; \
+ using btree_256_set_size##SIZE##copies##SIZE##ptr = \
+ btree_set<BigTypePtr<SIZE>>; \
+ using btree_256_map_size##SIZE##copies##SIZE##ptr = \
+ btree_map<int, BigTypePtr<SIZE>>; \
+ MY_BENCHMARK3(stl_set_size##SIZE##copies##SIZE##ptr); \
+ MY_BENCHMARK3(stl_unordered_set_size##SIZE##copies##SIZE##ptr); \
+ MY_BENCHMARK3(flat_hash_set_size##SIZE##copies##SIZE##ptr); \
+ MY_BENCHMARK3(btree_256_set_size##SIZE##copies##SIZE##ptr); \
+ MY_BENCHMARK3(stl_map_size##SIZE##copies##SIZE##ptr); \
+ MY_BENCHMARK3(stl_unordered_map_size##SIZE##copies##SIZE##ptr); \
+ MY_BENCHMARK3(flat_hash_map_size##SIZE##copies##SIZE##ptr); \
+ MY_BENCHMARK3(btree_256_map_size##SIZE##copies##SIZE##ptr)
+
+BIG_TYPE_PTR_BENCHMARKS(32);
+
+} // namespace
+} // namespace container_internal
+ABSL_NAMESPACE_END
+} // namespace absl
diff --git a/absl/container/internal/raw_hash_set.h b/absl/container/internal/raw_hash_set.h
index b1c686e..0d3d604 100644
--- a/absl/container/internal/raw_hash_set.h
+++ b/absl/container/internal/raw_hash_set.h
@@ -625,7 +625,7 @@ class raw_hash_set {
// PRECONDITION: not an end() iterator.
iterator& operator++() {
- /* To be enabled: assert_is_full(); */
+ assert_is_full();
++ctrl_;
++slot_;
skip_empty_or_deleted();
@@ -1084,10 +1084,15 @@ class raw_hash_set {
// Extension API: support for lazy emplace.
//
// Looks up key in the table. If found, returns the iterator to the element.
- // Otherwise calls f with one argument of type raw_hash_set::constructor. f
- // MUST call raw_hash_set::constructor with arguments as if a
- // raw_hash_set::value_type is constructed, otherwise the behavior is
- // undefined.
+ // Otherwise calls `f` with one argument of type `raw_hash_set::constructor`.
+ //
+ // `f` must abide by several restrictions:
+ // - it MUST call `raw_hash_set::constructor` with arguments as if a
+ // `raw_hash_set::value_type` is constructed,
+ // - it MUST NOT access the container before the call to
+ // `raw_hash_set::constructor`, and
+ // - it MUST NOT erase the lazily emplaced element.
+ // Doing any of these is undefined behavior.
//
// For example:
//
diff --git a/absl/flags/marshalling.h b/absl/flags/marshalling.h
index 1f3dc2d..0b50335 100644
--- a/absl/flags/marshalling.h
+++ b/absl/flags/marshalling.h
@@ -33,16 +33,16 @@
// * `double`
// * `std::string`
// * `std::vector<std::string>`
-// * `absl::LogSeverity` (provided here due to dependency ordering)
+// * `absl::LogSeverity` (provided natively for layering reasons)
//
// Note that support for integral types is implemented using overloads for
// variable-width fundamental types (`short`, `int`, `long`, etc.). However,
// you should prefer the fixed-width integral types (`int32_t`, `uint64_t`,
// etc.) we've noted above within flag definitions.
-
//
// In addition, several Abseil libraries provide their own custom support for
-// Abseil flags.
+// Abseil flags. Documentation for these formats is provided in the type's
+// `AbslParseFlag()` definition.
//
// The Abseil time library provides the following support for civil time values:
//
diff --git a/absl/strings/internal/str_format/extension.h b/absl/strings/internal/str_format/extension.h
index 5726ea5..51d7dd6 100644
--- a/absl/strings/internal/str_format/extension.h
+++ b/absl/strings/internal/str_format/extension.h
@@ -27,9 +27,6 @@
namespace absl {
ABSL_NAMESPACE_BEGIN
-
-class Cord;
-
namespace str_format_internal {
class FormatRawSinkImpl {
diff --git a/absl/strings/numbers.cc b/absl/strings/numbers.cc
index caab463..a0e5a7f 100644
--- a/absl/strings/numbers.cc
+++ b/absl/strings/numbers.cc
@@ -30,6 +30,7 @@
#include <memory>
#include <utility>
+#include "absl/base/attributes.h"
#include "absl/base/internal/bits.h"
#include "absl/base/internal/raw_logging.h"
#include "absl/strings/ascii.h"
@@ -719,8 +720,8 @@ inline bool safe_parse_sign_and_base(absl::string_view* text /*inout*/,
// commonly used bases.
template <typename IntType>
struct LookupTables {
- static const IntType kVmaxOverBase[];
- static const IntType kVminOverBase[];
+ ABSL_CONST_INIT static const IntType kVmaxOverBase[];
+ ABSL_CONST_INIT static const IntType kVminOverBase[];
};
// An array initializer macro for X/base where base in [0, 36].
@@ -735,6 +736,49 @@ struct LookupTables {
X / 35, X / 36, \
}
+// uint128& operator/=(uint128) is not constexpr, so hardcode the resulting
+// array to avoid a static initializer.
+template <>
+const uint128 LookupTables<uint128>::kVmaxOverBase[] = {
+ 0,
+ 0,
+ MakeUint128(9223372036854775807u, 18446744073709551615u),
+ MakeUint128(6148914691236517205u, 6148914691236517205u),
+ MakeUint128(4611686018427387903u, 18446744073709551615u),
+ MakeUint128(3689348814741910323u, 3689348814741910323u),
+ MakeUint128(3074457345618258602u, 12297829382473034410u),
+ MakeUint128(2635249153387078802u, 5270498306774157604u),
+ MakeUint128(2305843009213693951u, 18446744073709551615u),
+ MakeUint128(2049638230412172401u, 14347467612885206812u),
+ MakeUint128(1844674407370955161u, 11068046444225730969u),
+ MakeUint128(1676976733973595601u, 8384883669867978007u),
+ MakeUint128(1537228672809129301u, 6148914691236517205u),
+ MakeUint128(1418980313362273201u, 4256940940086819603u),
+ MakeUint128(1317624576693539401u, 2635249153387078802u),
+ MakeUint128(1229782938247303441u, 1229782938247303441u),
+ MakeUint128(1152921504606846975u, 18446744073709551615u),
+ MakeUint128(1085102592571150095u, 1085102592571150095u),
+ MakeUint128(1024819115206086200u, 16397105843297379214u),
+ MakeUint128(970881267037344821u, 16504981539634861972u),
+ MakeUint128(922337203685477580u, 14757395258967641292u),
+ MakeUint128(878416384462359600u, 14054662151397753612u),
+ MakeUint128(838488366986797800u, 13415813871788764811u),
+ MakeUint128(802032351030850070u, 4812194106185100421u),
+ MakeUint128(768614336404564650u, 12297829382473034410u),
+ MakeUint128(737869762948382064u, 11805916207174113034u),
+ MakeUint128(709490156681136600u, 11351842506898185609u),
+ MakeUint128(683212743470724133u, 17080318586768103348u),
+ MakeUint128(658812288346769700u, 10540996613548315209u),
+ MakeUint128(636094623231363848u, 15266270957552732371u),
+ MakeUint128(614891469123651720u, 9838263505978427528u),
+ MakeUint128(595056260442243600u, 9520900167075897608u),
+ MakeUint128(576460752303423487u, 18446744073709551615u),
+ MakeUint128(558992244657865200u, 8943875914525843207u),
+ MakeUint128(542551296285575047u, 9765923333140350855u),
+ MakeUint128(527049830677415760u, 8432797290838652167u),
+ MakeUint128(512409557603043100u, 8198552921648689607u),
+};
+
template <typename IntType>
const IntType LookupTables<IntType>::kVmaxOverBase[] =
X_OVER_BASE_INITIALIZER(std::numeric_limits<IntType>::max());
@@ -754,6 +798,8 @@ inline bool safe_parse_positive_int(absl::string_view text, int base,
assert(base >= 0);
assert(vmax >= static_cast<IntType>(base));
const IntType vmax_over_base = LookupTables<IntType>::kVmaxOverBase[base];
+ assert(base < 2 ||
+ std::numeric_limits<IntType>::max() / base == vmax_over_base);
const char* start = text.data();
const char* end = start + text.size();
// loop over digits
@@ -787,6 +833,8 @@ inline bool safe_parse_negative_int(absl::string_view text, int base,
assert(vmin < 0);
assert(vmin <= 0 - base);
IntType vmin_over_base = LookupTables<IntType>::kVminOverBase[base];
+ assert(base < 2 ||
+ std::numeric_limits<IntType>::min() / base == vmin_over_base);
// 2003 c++ standard [expr.mul]
// "... the sign of the remainder is implementation-defined."
// Although (vmin/base)*base + vmin%base is always vmin.
diff --git a/absl/time/internal/cctz/src/zone_info_source.cc b/absl/time/internal/cctz/src/zone_info_source.cc
index 619ac1f..98ea161 100644
--- a/absl/time/internal/cctz/src/zone_info_source.cc
+++ b/absl/time/internal/cctz/src/zone_info_source.cc
@@ -66,13 +66,41 @@ extern ZoneInfoSourceFactory zone_info_source_factory;
extern ZoneInfoSourceFactory default_factory;
ZoneInfoSourceFactory default_factory = DefaultFactory;
#if defined(_M_IX86)
-#pragma comment( \
- linker, \
- "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@absl@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@5@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@5@@ZA=?default_factory@cctz_extension@time_internal@absl@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@5@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@5@@ZA")
+#pragma comment( \
+ linker, \
+ "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+ "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+ "@@ZA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+ "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+ "@@ZA")
#elif defined(_M_IA_64) || defined(_M_AMD64) || defined(_M_ARM64)
-#pragma comment( \
- linker, \
- "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@absl@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@5@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@5@@ZEA=?default_factory@cctz_extension@time_internal@absl@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@5@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@absl@@U?$default_delete@VZoneInfoSource@cctz@time_internal@absl@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@5@@ZEA")
+#pragma comment( \
+ linker, \
+ "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+ "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+ "@@ZEA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+ "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \
+ "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \
+ "@@ZEA")
#else
#error Unsupported MSVC platform
#endif // _M_<PLATFORM>
diff --git a/absl/time/time.h b/absl/time/time.h
index 7507b0c..1be5727 100644
--- a/absl/time/time.h
+++ b/absl/time/time.h
@@ -527,30 +527,59 @@ std::chrono::seconds ToChronoSeconds(Duration d);
std::chrono::minutes ToChronoMinutes(Duration d);
std::chrono::hours ToChronoHours(Duration d);
+
// FormatDuration()
//
-// Returns a string representing the duration in the form "72h3m0.5s".
-// Returns "inf" or "-inf" for +/- `InfiniteDuration()`.
+// Returns a string represention of the duration in a format consisting of a
+// possibly-signed prefix and a sequence of decimal numbers, each with an
+// optional fractional part and a unit suffix.
+//
+// Valid unit suffixes are "ns", "us" "ms", "s", "m", and "h".
+//
+// Simple examples include "300ms", "-1.5h", and "2h45m". Returns "inf" or
+// "-inf" for +/- `InfiniteDuration()` values and "0" for `ZeroDuration()`
+// values.
+//
+// This string format is used both as an input for parsing (when handling
+// command-line flags of type `absl::Duration`) and as an output in
+// `FormatDuration()`
std::string FormatDuration(Duration d);
-// Output stream operator.
-inline std::ostream& operator<<(std::ostream& os, Duration d) {
- return os << FormatDuration(d);
-}
-
// ParseDuration()
//
-// Parses a duration string consisting of a possibly signed sequence of
-// decimal numbers, each with an optional fractional part and a unit
-// suffix. The valid suffixes are "ns", "us" "ms", "s", "m", and "h".
-// Simple examples include "300ms", "-1.5h", and "2h45m". Parses "0" as
-// `ZeroDuration()`. Parses "inf" and "-inf" as +/- `InfiniteDuration()`.
+// Parses a `dur_string` of the format noted above into an `absl::Duration`
+// value.
+//
+// Parses "0" as a zero-length duration value. Parses "-inf" or "+inf" as
+// infinite durations values.
bool ParseDuration(const std::string& dur_string, Duration* d);
-// Support for flag values of type Duration. Duration flags must be specified
-// in a format that is valid input for absl::ParseDuration().
+// AbslParseFlag()
+//
+// Parses the command-line flag string representation `text` (using the format
+// noted above) into an `absl::Duration` destination, setting `error` on
+// failure.
+//
+// Example:
+//
+// --timeout=6h30m
+// --timeout=inf // Equivalent to `InfiniteDuration()`
+// --timeout=0 // Equivalent to `ZeroDuration()`
bool AbslParseFlag(absl::string_view text, Duration* dst, std::string* error);
+
+// AbslUnparseFlag()
+//
+// Unparses an `absl::Duration` into a command-line string representation using
+// the format noted above.
std::string AbslUnparseFlag(Duration d);
+
+// operator<<()
+//
+// Output stream operator, returning a stream in the format noted above.
+inline std::ostream& operator<<(std::ostream& os, Duration d) {
+ return os << FormatDuration(d);
+}
+
ABSL_DEPRECATED("Use AbslParseFlag() instead.")
bool ParseFlag(const std::string& text, Duration* dst, std::string* error);
ABSL_DEPRECATED("Use AbslUnparseFlag() instead.")
@@ -813,18 +842,29 @@ Time FromChrono(const std::chrono::system_clock::time_point& tp);
// // tp == std::chrono::system_clock::from_time_t(123);
std::chrono::system_clock::time_point ToChronoTime(Time);
-// Support for flag values of type Time. Time flags must be specified in a
-// format that matches absl::RFC3339_full. For example:
+// AbslParseFlag()
+//
+// Parses the command-line flag string representation `text` into an
+// `absl::Time` destination, setting `error` on failure. Time flag string
+// representations must be specified in a format that matches
+// `absl::RFC3339_full`.
+//
+// Example:
//
// --start_time=2016-01-02T03:04:05.678+08:00
//
// Note: A UTC offset (or 'Z' indicating a zero-offset from UTC) is required.
//
// Additionally, if you'd like to specify a time as a count of
-// seconds/milliseconds/etc from the Unix epoch, use an absl::Duration flag
-// and add that duration to absl::UnixEpoch() to get an absl::Time.
+// seconds/milliseconds/etc from the Unix epoch, use an `absl::Duration` flag
+// and add that duration to `absl::UnixEpoch()` to get an `absl::Time`.
bool AbslParseFlag(absl::string_view text, Time* t, std::string* error);
+
+// AbslUnparseFlag()
+//
+// Unparses an `absl::Time` into a command-line string format as noted above.
std::string AbslUnparseFlag(Time t);
+
ABSL_DEPRECATED("Use AbslParseFlag() instead.")
bool ParseFlag(const std::string& text, Time* t, std::string* error);
ABSL_DEPRECATED("Use AbslUnparseFlag() instead.")
diff --git a/absl/types/compare.h b/absl/types/compare.h
index c29ced5..62ca70f 100644
--- a/absl/types/compare.h
+++ b/absl/types/compare.h
@@ -176,6 +176,14 @@ class weak_equality
weak_equality v) noexcept {
return 0 != v.value_;
}
+ friend constexpr bool operator==(weak_equality v1,
+ weak_equality v2) noexcept {
+ return v1.value_ == v2.value_;
+ }
+ friend constexpr bool operator!=(weak_equality v1,
+ weak_equality v2) noexcept {
+ return v1.value_ != v2.value_;
+ }
private:
compare_internal::value_type value_;
@@ -219,6 +227,14 @@ class strong_equality
strong_equality v) noexcept {
return 0 != v.value_;
}
+ friend constexpr bool operator==(strong_equality v1,
+ strong_equality v2) noexcept {
+ return v1.value_ == v2.value_;
+ }
+ friend constexpr bool operator!=(strong_equality v1,
+ strong_equality v2) noexcept {
+ return v1.value_ != v2.value_;
+ }
private:
compare_internal::value_type value_;
@@ -306,6 +322,14 @@ class partial_ordering
partial_ordering v) noexcept {
return v.is_ordered() && 0 >= v.value_;
}
+ friend constexpr bool operator==(partial_ordering v1,
+ partial_ordering v2) noexcept {
+ return v1.value_ == v2.value_;
+ }
+ friend constexpr bool operator!=(partial_ordering v1,
+ partial_ordering v2) noexcept {
+ return v1.value_ != v2.value_;
+ }
private:
compare_internal::value_type value_;
@@ -390,6 +414,14 @@ class weak_ordering
weak_ordering v) noexcept {
return 0 >= v.value_;
}
+ friend constexpr bool operator==(weak_ordering v1,
+ weak_ordering v2) noexcept {
+ return v1.value_ == v2.value_;
+ }
+ friend constexpr bool operator!=(weak_ordering v1,
+ weak_ordering v2) noexcept {
+ return v1.value_ != v2.value_;
+ }
private:
compare_internal::value_type value_;
@@ -481,6 +513,14 @@ class strong_ordering
strong_ordering v) noexcept {
return 0 >= v.value_;
}
+ friend constexpr bool operator==(strong_ordering v1,
+ strong_ordering v2) noexcept {
+ return v1.value_ == v2.value_;
+ }
+ friend constexpr bool operator!=(strong_ordering v1,
+ strong_ordering v2) noexcept {
+ return v1.value_ != v2.value_;
+ }
private:
compare_internal::value_type value_;
diff --git a/absl/types/compare_test.cc b/absl/types/compare_test.cc
index 955844b..8095baf 100644
--- a/absl/types/compare_test.cc
+++ b/absl/types/compare_test.cc
@@ -31,6 +31,15 @@ TEST(Compare, WeakEquality) {
EXPECT_TRUE(Identity(0 == weak_equality::equivalent));
EXPECT_TRUE(Identity(weak_equality::nonequivalent != 0));
EXPECT_TRUE(Identity(0 != weak_equality::nonequivalent));
+ const weak_equality values[] = {weak_equality::equivalent,
+ weak_equality::nonequivalent};
+ for (const auto& lhs : values) {
+ for (const auto& rhs : values) {
+ const bool are_equal = &lhs == &rhs;
+ EXPECT_EQ(lhs == rhs, are_equal);
+ EXPECT_EQ(lhs != rhs, !are_equal);
+ }
+ }
}
TEST(Compare, StrongEquality) {
@@ -42,6 +51,18 @@ TEST(Compare, StrongEquality) {
EXPECT_TRUE(Identity(0 == strong_equality::equivalent));
EXPECT_TRUE(Identity(strong_equality::nonequivalent != 0));
EXPECT_TRUE(Identity(0 != strong_equality::nonequivalent));
+ const strong_equality values[] = {strong_equality::equal,
+ strong_equality::nonequal};
+ for (const auto& lhs : values) {
+ for (const auto& rhs : values) {
+ const bool are_equal = &lhs == &rhs;
+ EXPECT_EQ(lhs == rhs, are_equal);
+ EXPECT_EQ(lhs != rhs, !are_equal);
+ }
+ }
+ EXPECT_TRUE(Identity(strong_equality::equivalent == strong_equality::equal));
+ EXPECT_TRUE(
+ Identity(strong_equality::nonequivalent == strong_equality::nonequal));
}
TEST(Compare, PartialOrdering) {
@@ -65,6 +86,16 @@ TEST(Compare, PartialOrdering) {
EXPECT_FALSE(Identity(0 > partial_ordering::unordered));
EXPECT_FALSE(Identity(partial_ordering::unordered >= 0));
EXPECT_FALSE(Identity(0 >= partial_ordering::unordered));
+ const partial_ordering values[] = {
+ partial_ordering::less, partial_ordering::equivalent,
+ partial_ordering::greater, partial_ordering::unordered};
+ for (const auto& lhs : values) {
+ for (const auto& rhs : values) {
+ const bool are_equal = &lhs == &rhs;
+ EXPECT_EQ(lhs == rhs, are_equal);
+ EXPECT_EQ(lhs != rhs, !are_equal);
+ }
+ }
}
TEST(Compare, WeakOrdering) {
@@ -78,6 +109,15 @@ TEST(Compare, WeakOrdering) {
EXPECT_TRUE(Identity(0 < weak_ordering::greater));
EXPECT_TRUE(Identity(weak_ordering::greater >= 0));
EXPECT_TRUE(Identity(0 <= weak_ordering::greater));
+ const weak_ordering values[] = {
+ weak_ordering::less, weak_ordering::equivalent, weak_ordering::greater};
+ for (const auto& lhs : values) {
+ for (const auto& rhs : values) {
+ const bool are_equal = &lhs == &rhs;
+ EXPECT_EQ(lhs == rhs, are_equal);
+ EXPECT_EQ(lhs != rhs, !are_equal);
+ }
+ }
}
TEST(Compare, StrongOrdering) {
@@ -93,6 +133,16 @@ TEST(Compare, StrongOrdering) {
EXPECT_TRUE(Identity(0 < strong_ordering::greater));
EXPECT_TRUE(Identity(strong_ordering::greater >= 0));
EXPECT_TRUE(Identity(0 <= strong_ordering::greater));
+ const strong_ordering values[] = {
+ strong_ordering::less, strong_ordering::equal, strong_ordering::greater};
+ for (const auto& lhs : values) {
+ for (const auto& rhs : values) {
+ const bool are_equal = &lhs == &rhs;
+ EXPECT_EQ(lhs == rhs, are_equal);
+ EXPECT_EQ(lhs != rhs, !are_equal);
+ }
+ }
+ EXPECT_TRUE(Identity(strong_ordering::equivalent == strong_ordering::equal));
}
TEST(Compare, Conversions) {
@@ -190,7 +240,7 @@ TEST(Compare, Conversions) {
struct WeakOrderingLess {
template <typename T>
- absl::weak_ordering operator()(const T &a, const T &b) const {
+ absl::weak_ordering operator()(const T& a, const T& b) const {
return a < b ? absl::weak_ordering::less
: a == b ? absl::weak_ordering::equivalent
: absl::weak_ordering::greater;
@@ -224,10 +274,10 @@ TEST(DoLessThanComparison, SanityTest) {
}
TEST(CompareResultAsOrdering, SanityTest) {
- EXPECT_TRUE(Identity(
- absl::compare_internal::compare_result_as_ordering(-1) < 0));
- EXPECT_FALSE(Identity(
- absl::compare_internal::compare_result_as_ordering(-1) == 0));
+ EXPECT_TRUE(
+ Identity(absl::compare_internal::compare_result_as_ordering(-1) < 0));
+ EXPECT_FALSE(
+ Identity(absl::compare_internal::compare_result_as_ordering(-1) == 0));
EXPECT_FALSE(
Identity(absl::compare_internal::compare_result_as_ordering(-1) > 0));
EXPECT_TRUE(Identity(absl::compare_internal::compare_result_as_ordering(
@@ -237,31 +287,31 @@ TEST(CompareResultAsOrdering, SanityTest) {
EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
weak_ordering::less) > 0));
- EXPECT_FALSE(Identity(
- absl::compare_internal::compare_result_as_ordering(0) < 0));
- EXPECT_TRUE(Identity(
- absl::compare_internal::compare_result_as_ordering(0) == 0));
- EXPECT_FALSE(Identity(
- absl::compare_internal::compare_result_as_ordering(0) > 0));
+ EXPECT_FALSE(
+ Identity(absl::compare_internal::compare_result_as_ordering(0) < 0));
+ EXPECT_TRUE(
+ Identity(absl::compare_internal::compare_result_as_ordering(0) == 0));
+ EXPECT_FALSE(
+ Identity(absl::compare_internal::compare_result_as_ordering(0) > 0));
EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
- weak_ordering::equivalent) < 0));
+ weak_ordering::equivalent) < 0));
EXPECT_TRUE(Identity(absl::compare_internal::compare_result_as_ordering(
- weak_ordering::equivalent) == 0));
+ weak_ordering::equivalent) == 0));
EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
weak_ordering::equivalent) > 0));
- EXPECT_FALSE(Identity(
- absl::compare_internal::compare_result_as_ordering(1) < 0));
- EXPECT_FALSE(Identity(
- absl::compare_internal::compare_result_as_ordering(1) == 0));
- EXPECT_TRUE(Identity(
- absl::compare_internal::compare_result_as_ordering(1) > 0));
+ EXPECT_FALSE(
+ Identity(absl::compare_internal::compare_result_as_ordering(1) < 0));
+ EXPECT_FALSE(
+ Identity(absl::compare_internal::compare_result_as_ordering(1) == 0));
+ EXPECT_TRUE(
+ Identity(absl::compare_internal::compare_result_as_ordering(1) > 0));
EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
- weak_ordering::greater) < 0));
+ weak_ordering::greater) < 0));
EXPECT_FALSE(Identity(absl::compare_internal::compare_result_as_ordering(
weak_ordering::greater) == 0));
EXPECT_TRUE(Identity(absl::compare_internal::compare_result_as_ordering(
- weak_ordering::greater) > 0));
+ weak_ordering::greater) > 0));
}
TEST(DoThreeWayComparison, SanityTest) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-01 19:28:11 +0000