chore(3p/abseil_cpp): unvendor abseil_cpp r/3786

we weren't actually using these sources anymore, okay? Change-Id: If701571d9716de308d3512e1eb22c35db0877a66 Reviewed-on: https://cl.tvl.fyi/c/depot/+/5248 Tested-by: BuildkiteCI Reviewed-by: grfn <grfn@gws.fyi> Autosubmit: tazjin <tazjin@tvl.su>
author: Vincent Ambo <mail@tazj.in> 2022-02-07T23·05+0300
committer: clbot <clbot@tvl.fyi> 2022-02-07T23·09+0000
commit: 5aa5d282eac56a21e74611c1cdbaa97bb5db2dca (patch)
tree: 8cc5dce8157a1470ff76719dd15d65f648a05522 /third_party/abseil_cpp/absl/hash/internal
parent: a25675804c4f429fab5ee5201fe25e89865dfd13 (diff)
7 files changed, 0 insertions, 2334 deletions
diff --git a/third_party/abseil_cpp/absl/hash/internal/city.cc b/third_party/abseil_cpp/absl/hash/internal/city.cc
deleted file mode 100644
index 5460134e5762..000000000000
--- a/third_party/abseil_cpp/absl/hash/internal/city.cc
+++ /dev/null
@@ -1,349 +0,0 @@
-// 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.
-//
-// This file provides CityHash64() and related functions.
-//
-// It's probably possible to create even faster hash functions by
-// writing a program that systematically explores some of the space of
-// possible hash functions, by using SIMD instructions, or by
-// compromising on hash quality.
-
-#include "absl/hash/internal/city.h"
-
-#include <string.h>  // for memcpy and memset
-#include <algorithm>
-
-#include "absl/base/config.h"
-#include "absl/base/internal/endian.h"
-#include "absl/base/internal/unaligned_access.h"
-#include "absl/base/optimization.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-#ifdef ABSL_IS_BIG_ENDIAN
-#define uint32_in_expected_order(x) (absl::gbswap_32(x))
-#define uint64_in_expected_order(x) (absl::gbswap_64(x))
-#else
-#define uint32_in_expected_order(x) (x)
-#define uint64_in_expected_order(x) (x)
-#endif
-
-static uint64_t Fetch64(const char *p) {
-  return uint64_in_expected_order(ABSL_INTERNAL_UNALIGNED_LOAD64(p));
-}
-
-static uint32_t Fetch32(const char *p) {
-  return uint32_in_expected_order(ABSL_INTERNAL_UNALIGNED_LOAD32(p));
-}
-
-// Some primes between 2^63 and 2^64 for various uses.
-static const uint64_t k0 = 0xc3a5c85c97cb3127ULL;
-static const uint64_t k1 = 0xb492b66fbe98f273ULL;
-static const uint64_t k2 = 0x9ae16a3b2f90404fULL;
-
-// Magic numbers for 32-bit hashing.  Copied from Murmur3.
-static const uint32_t c1 = 0xcc9e2d51;
-static const uint32_t c2 = 0x1b873593;
-
-// A 32-bit to 32-bit integer hash copied from Murmur3.
-static uint32_t fmix(uint32_t h) {
-  h ^= h >> 16;
-  h *= 0x85ebca6b;
-  h ^= h >> 13;
-  h *= 0xc2b2ae35;
-  h ^= h >> 16;
-  return h;
-}
-
-static uint32_t Rotate32(uint32_t val, int shift) {
-  // Avoid shifting by 32: doing so yields an undefined result.
-  return shift == 0 ? val : ((val >> shift) | (val << (32 - shift)));
-}
-
-#undef PERMUTE3
-#define PERMUTE3(a, b, c) \
-  do {                    \
-    std::swap(a, b);      \
-    std::swap(a, c);      \
-  } while (0)
-
-static uint32_t Mur(uint32_t a, uint32_t h) {
-  // Helper from Murmur3 for combining two 32-bit values.
-  a *= c1;
-  a = Rotate32(a, 17);
-  a *= c2;
-  h ^= a;
-  h = Rotate32(h, 19);
-  return h * 5 + 0xe6546b64;
-}
-
-static uint32_t Hash32Len13to24(const char *s, size_t len) {
-  uint32_t a = Fetch32(s - 4 + (len >> 1));
-  uint32_t b = Fetch32(s + 4);
-  uint32_t c = Fetch32(s + len - 8);
-  uint32_t d = Fetch32(s + (len >> 1));
-  uint32_t e = Fetch32(s);
-  uint32_t f = Fetch32(s + len - 4);
-  uint32_t h = len;
-
-  return fmix(Mur(f, Mur(e, Mur(d, Mur(c, Mur(b, Mur(a, h)))))));
-}
-
-static uint32_t Hash32Len0to4(const char *s, size_t len) {
-  uint32_t b = 0;
-  uint32_t c = 9;
-  for (size_t i = 0; i < len; i++) {
-    signed char v = s[i];
-    b = b * c1 + v;
-    c ^= b;
-  }
-  return fmix(Mur(b, Mur(len, c)));
-}
-
-static uint32_t Hash32Len5to12(const char *s, size_t len) {
-  uint32_t a = len, b = len * 5, c = 9, d = b;
-  a += Fetch32(s);
-  b += Fetch32(s + len - 4);
-  c += Fetch32(s + ((len >> 1) & 4));
-  return fmix(Mur(c, Mur(b, Mur(a, d))));
-}
-
-uint32_t CityHash32(const char *s, size_t len) {
-  if (len <= 24) {
-    return len <= 12
-               ? (len <= 4 ? Hash32Len0to4(s, len) : Hash32Len5to12(s, len))
-               : Hash32Len13to24(s, len);
-  }
-
-  // len > 24
-  uint32_t h = len, g = c1 * len, f = g;
-
-  uint32_t a0 = Rotate32(Fetch32(s + len - 4) * c1, 17) * c2;
-  uint32_t a1 = Rotate32(Fetch32(s + len - 8) * c1, 17) * c2;
-  uint32_t a2 = Rotate32(Fetch32(s + len - 16) * c1, 17) * c2;
-  uint32_t a3 = Rotate32(Fetch32(s + len - 12) * c1, 17) * c2;
-  uint32_t a4 = Rotate32(Fetch32(s + len - 20) * c1, 17) * c2;
-  h ^= a0;
-  h = Rotate32(h, 19);
-  h = h * 5 + 0xe6546b64;
-  h ^= a2;
-  h = Rotate32(h, 19);
-  h = h * 5 + 0xe6546b64;
-  g ^= a1;
-  g = Rotate32(g, 19);
-  g = g * 5 + 0xe6546b64;
-  g ^= a3;
-  g = Rotate32(g, 19);
-  g = g * 5 + 0xe6546b64;
-  f += a4;
-  f = Rotate32(f, 19);
-  f = f * 5 + 0xe6546b64;
-  size_t iters = (len - 1) / 20;
-  do {
-    uint32_t b0 = Rotate32(Fetch32(s) * c1, 17) * c2;
-    uint32_t b1 = Fetch32(s + 4);
-    uint32_t b2 = Rotate32(Fetch32(s + 8) * c1, 17) * c2;
-    uint32_t b3 = Rotate32(Fetch32(s + 12) * c1, 17) * c2;
-    uint32_t b4 = Fetch32(s + 16);
-    h ^= b0;
-    h = Rotate32(h, 18);
-    h = h * 5 + 0xe6546b64;
-    f += b1;
-    f = Rotate32(f, 19);
-    f = f * c1;
-    g += b2;
-    g = Rotate32(g, 18);
-    g = g * 5 + 0xe6546b64;
-    h ^= b3 + b1;
-    h = Rotate32(h, 19);
-    h = h * 5 + 0xe6546b64;
-    g ^= b4;
-    g = absl::gbswap_32(g) * 5;
-    h += b4 * 5;
-    h = absl::gbswap_32(h);
-    f += b0;
-    PERMUTE3(f, h, g);
-    s += 20;
-  } while (--iters != 0);
-  g = Rotate32(g, 11) * c1;
-  g = Rotate32(g, 17) * c1;
-  f = Rotate32(f, 11) * c1;
-  f = Rotate32(f, 17) * c1;
-  h = Rotate32(h + g, 19);
-  h = h * 5 + 0xe6546b64;
-  h = Rotate32(h, 17) * c1;
-  h = Rotate32(h + f, 19);
-  h = h * 5 + 0xe6546b64;
-  h = Rotate32(h, 17) * c1;
-  return h;
-}
-
-// Bitwise right rotate.  Normally this will compile to a single
-// instruction, especially if the shift is a manifest constant.
-static uint64_t Rotate(uint64_t val, int shift) {
-  // Avoid shifting by 64: doing so yields an undefined result.
-  return shift == 0 ? val : ((val >> shift) | (val << (64 - shift)));
-}
-
-static uint64_t ShiftMix(uint64_t val) { return val ^ (val >> 47); }
-
-static uint64_t HashLen16(uint64_t u, uint64_t v, uint64_t mul) {
-  // Murmur-inspired hashing.
-  uint64_t a = (u ^ v) * mul;
-  a ^= (a >> 47);
-  uint64_t b = (v ^ a) * mul;
-  b ^= (b >> 47);
-  b *= mul;
-  return b;
-}
-
-static uint64_t HashLen16(uint64_t u, uint64_t v) {
-  const uint64_t kMul = 0x9ddfea08eb382d69ULL;
-  return HashLen16(u, v, kMul);
-}
-
-static uint64_t HashLen0to16(const char *s, size_t len) {
-  if (len >= 8) {
-    uint64_t mul = k2 + len * 2;
-    uint64_t a = Fetch64(s) + k2;
-    uint64_t b = Fetch64(s + len - 8);
-    uint64_t c = Rotate(b, 37) * mul + a;
-    uint64_t d = (Rotate(a, 25) + b) * mul;
-    return HashLen16(c, d, mul);
-  }
-  if (len >= 4) {
-    uint64_t mul = k2 + len * 2;
-    uint64_t a = Fetch32(s);
-    return HashLen16(len + (a << 3), Fetch32(s + len - 4), mul);
-  }
-  if (len > 0) {
-    uint8_t a = s[0];
-    uint8_t b = s[len >> 1];
-    uint8_t c = s[len - 1];
-    uint32_t y = static_cast<uint32_t>(a) + (static_cast<uint32_t>(b) << 8);
-    uint32_t z = len + (static_cast<uint32_t>(c) << 2);
-    return ShiftMix(y * k2 ^ z * k0) * k2;
-  }
-  return k2;
-}
-
-// This probably works well for 16-byte strings as well, but it may be overkill
-// in that case.
-static uint64_t HashLen17to32(const char *s, size_t len) {
-  uint64_t mul = k2 + len * 2;
-  uint64_t a = Fetch64(s) * k1;
-  uint64_t b = Fetch64(s + 8);
-  uint64_t c = Fetch64(s + len - 8) * mul;
-  uint64_t d = Fetch64(s + len - 16) * k2;
-  return HashLen16(Rotate(a + b, 43) + Rotate(c, 30) + d,
-                   a + Rotate(b + k2, 18) + c, mul);
-}
-
-// Return a 16-byte hash for 48 bytes.  Quick and dirty.
-// Callers do best to use "random-looking" values for a and b.
-static std::pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(
-    uint64_t w, uint64_t x, uint64_t y, uint64_t z, uint64_t a, uint64_t b) {
-  a += w;
-  b = Rotate(b + a + z, 21);
-  uint64_t c = a;
-  a += x;
-  a += y;
-  b += Rotate(a, 44);
-  return std::make_pair(a + z, b + c);
-}
-
-// Return a 16-byte hash for s[0] ... s[31], a, and b.  Quick and dirty.
-static std::pair<uint64_t, uint64_t> WeakHashLen32WithSeeds(const char *s,
-                                                            uint64_t a,
-                                                            uint64_t b) {
-  return WeakHashLen32WithSeeds(Fetch64(s), Fetch64(s + 8), Fetch64(s + 16),
-                                Fetch64(s + 24), a, b);
-}
-
-// Return an 8-byte hash for 33 to 64 bytes.
-static uint64_t HashLen33to64(const char *s, size_t len) {
-  uint64_t mul = k2 + len * 2;
-  uint64_t a = Fetch64(s) * k2;
-  uint64_t b = Fetch64(s + 8);
-  uint64_t c = Fetch64(s + len - 24);
-  uint64_t d = Fetch64(s + len - 32);
-  uint64_t e = Fetch64(s + 16) * k2;
-  uint64_t f = Fetch64(s + 24) * 9;
-  uint64_t g = Fetch64(s + len - 8);
-  uint64_t h = Fetch64(s + len - 16) * mul;
-  uint64_t u = Rotate(a + g, 43) + (Rotate(b, 30) + c) * 9;
-  uint64_t v = ((a + g) ^ d) + f + 1;
-  uint64_t w = absl::gbswap_64((u + v) * mul) + h;
-  uint64_t x = Rotate(e + f, 42) + c;
-  uint64_t y = (absl::gbswap_64((v + w) * mul) + g) * mul;
-  uint64_t z = e + f + c;
-  a = absl::gbswap_64((x + z) * mul + y) + b;
-  b = ShiftMix((z + a) * mul + d + h) * mul;
-  return b + x;
-}
-
-uint64_t CityHash64(const char *s, size_t len) {
-  if (len <= 32) {
-    if (len <= 16) {
-      return HashLen0to16(s, len);
-    } else {
-      return HashLen17to32(s, len);
-    }
-  } else if (len <= 64) {
-    return HashLen33to64(s, len);
-  }
-
-  // For strings over 64 bytes we hash the end first, and then as we
-  // loop we keep 56 bytes of state: v, w, x, y, and z.
-  uint64_t x = Fetch64(s + len - 40);
-  uint64_t y = Fetch64(s + len - 16) + Fetch64(s + len - 56);
-  uint64_t z = HashLen16(Fetch64(s + len - 48) + len, Fetch64(s + len - 24));
-  std::pair<uint64_t, uint64_t> v =
-      WeakHashLen32WithSeeds(s + len - 64, len, z);
-  std::pair<uint64_t, uint64_t> w =
-      WeakHashLen32WithSeeds(s + len - 32, y + k1, x);
-  x = x * k1 + Fetch64(s);
-
-  // Decrease len to the nearest multiple of 64, and operate on 64-byte chunks.
-  len = (len - 1) & ~static_cast<size_t>(63);
-  do {
-    x = Rotate(x + y + v.first + Fetch64(s + 8), 37) * k1;
-    y = Rotate(y + v.second + Fetch64(s + 48), 42) * k1;
-    x ^= w.second;
-    y += v.first + Fetch64(s + 40);
-    z = Rotate(z + w.first, 33) * k1;
-    v = WeakHashLen32WithSeeds(s, v.second * k1, x + w.first);
-    w = WeakHashLen32WithSeeds(s + 32, z + w.second, y + Fetch64(s + 16));
-    std::swap(z, x);
-    s += 64;
-    len -= 64;
-  } while (len != 0);
-  return HashLen16(HashLen16(v.first, w.first) + ShiftMix(y) * k1 + z,
-                   HashLen16(v.second, w.second) + x);
-}
-
-uint64_t CityHash64WithSeed(const char *s, size_t len, uint64_t seed) {
-  return CityHash64WithSeeds(s, len, k2, seed);
-}
-
-uint64_t CityHash64WithSeeds(const char *s, size_t len, uint64_t seed0,
-                             uint64_t seed1) {
-  return HashLen16(CityHash64(s, len) - seed0, seed1);
-}
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil_cpp/absl/hash/internal/city.h b/third_party/abseil_cpp/absl/hash/internal/city.h
deleted file mode 100644
index 393da0b95d9f..000000000000
--- a/third_party/abseil_cpp/absl/hash/internal/city.h
+++ /dev/null
@@ -1,78 +0,0 @@
-// 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.
-//
-// https://code.google.com/p/cityhash/
-//
-// This file provides a few functions for hashing strings.  All of them are
-// high-quality functions in the sense that they pass standard tests such
-// as Austin Appleby's SMHasher.  They are also fast.
-//
-// For 64-bit x86 code, on short strings, we don't know of anything faster than
-// CityHash64 that is of comparable quality.  We believe our nearest competitor
-// is Murmur3.  For 64-bit x86 code, CityHash64 is an excellent choice for hash
-// tables and most other hashing (excluding cryptography).
-//
-// For 32-bit x86 code, we don't know of anything faster than CityHash32 that
-// is of comparable quality.  We believe our nearest competitor is Murmur3A.
-// (On 64-bit CPUs, it is typically faster to use the other CityHash variants.)
-//
-// Functions in the CityHash family are not suitable for cryptography.
-//
-// Please see CityHash's README file for more details on our performance
-// measurements and so on.
-//
-// WARNING: This code has been only lightly tested on big-endian platforms!
-// It is known to work well on little-endian platforms that have a small penalty
-// for unaligned reads, such as current Intel and AMD moderate-to-high-end CPUs.
-// It should work on all 32-bit and 64-bit platforms that allow unaligned reads;
-// bug reports are welcome.
-//
-// By the way, for some hash functions, given strings a and b, the hash
-// of a+b is easily derived from the hashes of a and b.  This property
-// doesn't hold for any hash functions in this file.
-
-#ifndef ABSL_HASH_INTERNAL_CITY_H_
-#define ABSL_HASH_INTERNAL_CITY_H_
-
-#include <stdint.h>
-#include <stdlib.h>  // for size_t.
-
-#include <utility>
-
-#include "absl/base/config.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-// Hash function for a byte array.
-uint64_t CityHash64(const char *s, size_t len);
-
-// Hash function for a byte array.  For convenience, a 64-bit seed is also
-// hashed into the result.
-uint64_t CityHash64WithSeed(const char *s, size_t len, uint64_t seed);
-
-// Hash function for a byte array.  For convenience, two seeds are also
-// hashed into the result.
-uint64_t CityHash64WithSeeds(const char *s, size_t len, uint64_t seed0,
-                             uint64_t seed1);
-
-// Hash function for a byte array.  Most useful in 32-bit binaries.
-uint32_t CityHash32(const char *s, size_t len);
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HASH_INTERNAL_CITY_H_
diff --git a/third_party/abseil_cpp/absl/hash/internal/city_test.cc b/third_party/abseil_cpp/absl/hash/internal/city_test.cc
deleted file mode 100644
index 251d381d73e1..000000000000
--- a/third_party/abseil_cpp/absl/hash/internal/city_test.cc
+++ /dev/null
@@ -1,595 +0,0 @@
-// 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 "absl/hash/internal/city.h"
-
-#include <string.h>
-#include <cstdio>
-#include <iostream>
-#include "gtest/gtest.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-static const uint64_t k0 = 0xc3a5c85c97cb3127ULL;
-static const uint64_t kSeed0 = 1234567;
-static const uint64_t kSeed1 = k0;
-static const int kDataSize = 1 << 20;
-static const int kTestSize = 300;
-
-static char data[kDataSize];
-
-// Initialize data to pseudorandom values.
-void setup() {
-  uint64_t a = 9;
-  uint64_t b = 777;
-  for (int i = 0; i < kDataSize; i++) {
-    a += b;
-    b += a;
-    a = (a ^ (a >> 41)) * k0;
-    b = (b ^ (b >> 41)) * k0 + i;
-    uint8_t u = b >> 37;
-    memcpy(data + i, &u, 1);  // uint8_t -> char
-  }
-}
-
-#define C(x) 0x##x##ULL
-static const uint64_t testdata[kTestSize][4] = {
-    {C(9ae16a3b2f90404f), C(75106db890237a4a), C(3feac5f636039766),
-     C(dc56d17a)},
-    {C(541150e87f415e96), C(1aef0d24b3148a1a), C(bacc300e1e82345a),
-     C(99929334)},
-    {C(f3786a4b25827c1), C(34ee1a2bf767bd1c), C(2f15ca2ebfb631f2), C(4252edb7)},
-    {C(ef923a7a1af78eab), C(79163b1e1e9a9b18), C(df3b2aca6e1e4a30),
-     C(ebc34f3c)},
-    {C(11df592596f41d88), C(843ec0bce9042f9c), C(cce2ea1e08b1eb30),
-     C(26f2b463)},
-    {C(831f448bdc5600b3), C(62a24be3120a6919), C(1b44098a41e010da),
-     C(b042c047)},
-    {C(3eca803e70304894), C(d80de767e4a920a), C(a51cfbb292efd53d), C(e73bb0a8)},
-    {C(1b5a063fb4c7f9f1), C(318dbc24af66dee9), C(10ef7b32d5c719af),
-     C(91dfdd75)},
-    {C(a0f10149a0e538d6), C(69d008c20f87419f), C(41b36376185b3e9e),
-     C(c87f95de)},
-    {C(fb8d9c70660b910b), C(a45b0cc3476bff1b), C(b28d1996144f0207),
-     C(3f5538ef)},
-    {C(236827beae282a46), C(e43970221139c946), C(4f3ac6faa837a3aa),
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-    {C(dc107285fd8e1af7), C(a8641a0609321f3f), C(db06e89ffdc54466),
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-    {C(3d69e52049879d61), C(76610636ea9f74fe), C(e9bf5602f89310c0),
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-    {C(461c82656a74fb57), C(d84b491b275aa0f7), C(8f262cb29a6eb8b2),
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-    {C(53c1a66d0b13003), C(731f060e6fe797fc), C(daa56811791371e3), C(88a474a7)},
-    {C(d3a2efec0f047e9), C(1cabce58853e58ea), C(7a17b2eae3256be4), C(5b5bedd)},
-    {C(43c64d7484f7f9b2), C(5da002b64aafaeb7), C(b576c1e45800a716),
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-    {C(a7dec6ad81cf7fa1), C(180c1ab708683063), C(95e0fd7008d67cff),
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-    {C(5408a1df99d4aff), C(b9565e588740f6bd), C(abf241813b08006e), C(cbca8606)},
-    {C(a8b27a6bcaeeed4b), C(aec1eeded6a87e39), C(9daf246d6fed8326),
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-    {C(9a952a8246fdc269), C(d0dcfcac74ef278c), C(250f7139836f0f1f),
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-    {C(c930841d1d88684f), C(5eb66eb18b7f9672), C(e455d413008a2546),
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-    {C(94dc6971e3cf071a), C(994c7003b73b2b34), C(ea16e85978694e5), C(4b3a1d76)},
-    {C(7fc98006e25cac9), C(77fee0484cda86a7), C(376ec3d447060456), C(a8bb6d80)},
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-    {C(da60e6b14479f9df), C(3bdccf69ece16792), C(18ebf45c4fecfdc9),
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-    {C(4ca56a348b6c4d3), C(60618537c3872514), C(2fbb9f0e65871b09), C(1bf31347)},
-    {C(ebd22d4b70946401), C(6863602bf7139017), C(c0b1ac4e11b00666),
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-    {C(3cc4693d6cbcb0c), C(501689ea1c70ffa), C(10a4353e9c89e364), C(459c3930)},
-    {C(38908e43f7ba5ef0), C(1ab035d4e7781e76), C(41d133e8c0a68ff7),
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-    {C(34983ccc6aa40205), C(21802cad34e72bc4), C(1943e8fb3c17bb8), C(ffc7a781)},
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-    {C(1d7a31f5bc8fe2f9), C(4763991092dcf836), C(ed695f55b97416f4),
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-    {C(94129a84c376a26e), C(c245e859dc231933), C(1b8f74fecf917453),
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-    {C(1d3a9809dab05c8d), C(adddeb4f71c93e8), C(ef342eb36631edb), C(fcace348)},
-    {C(90fa3ccbd60848da), C(dfa6e0595b569e11), C(e585d067a1f5135d),
-     C(ed7b6f9a)},
-    {C(2dbb4fc71b554514), C(9650e04b86be0f82), C(60f2304fba9274d3),
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-    {C(b98bf4274d18374a), C(1b669fd4c7f9a19a), C(b1f5972b88ba2b7a),
-     C(7a4d48d5)},
-    {C(d6781d0b5e18eb68), C(b992913cae09b533), C(58f6021caaee3a40),
-     C(e686f3db)},
-    {C(226651cf18f4884c), C(595052a874f0f51c), C(c9b75162b23bab42), C(cce7c55)},
-    {C(a734fb047d3162d6), C(e523170d240ba3a5), C(125a6972809730e8), C(f58b96b)},
-    {C(c6df6364a24f75a3), C(c294e2c84c4f5df8), C(a88df65c6a89313b),
-     C(1bbf6f60)},
-    {C(d8d1364c1fbcd10), C(2d7cc7f54832deaa), C(4e22c876a7c57625), C(ce5e0cc2)},
-    {C(aae06f9146db885f), C(3598736441e280d9), C(fba339b117083e55),
-     C(584cfd6f)},
-    {C(8955ef07631e3bcc), C(7d70965ea3926f83), C(39aed4134f8b2db6),
-     C(8f9bbc33)},
-    {C(ad611c609cfbe412), C(d3c00b18bf253877), C(90b2172e1f3d0bfd),
-     C(d7640d95)},
-    {C(d5339adc295d5d69), C(b633cc1dcb8b586a), C(ee84184cf5b1aeaf), C(3d12a2b)},
-    {C(40d0aeff521375a8), C(77ba1ad7ecebd506), C(547c6f1a7d9df427),
-     C(aaeafed0)},
-    {C(8b2d54ae1a3df769), C(11e7adaee3216679), C(3483781efc563e03),
-     C(95b9b814)},
-    {C(99c175819b4eae28), C(932e8ff9f7a40043), C(ec78dcab07ca9f7c),
-     C(45fbe66e)},
-    {C(2a418335779b82fc), C(af0295987849a76b), C(c12bc5ff0213f46e),
-     C(b4baa7a8)},
-    {C(3b1fc6a3d279e67d), C(70ea1e49c226396), C(25505adcf104697c), C(83e962fe)},
-    {C(d97eacdf10f1c3c9), C(b54f4654043a36e0), C(b128f6eb09d1234), C(aac3531c)},
-    {C(293a5c1c4e203cd4), C(6b3329f1c130cefe), C(f2e32f8ec76aac91),
-     C(2b1db7cc)},
-    {C(4290e018ffaedde7), C(a14948545418eb5e), C(72d851b202284636),
-     C(cf00cd31)},
-    {C(f919a59cbde8bf2f), C(a56d04203b2dc5a5), C(38b06753ac871e48),
-     C(7d3c43b8)},
-    {C(1d70a3f5521d7fa4), C(fb97b3fdc5891965), C(299d49bbbe3535af),
-     C(cbd5fac6)},
-    {C(6af98d7b656d0d7c), C(d2e99ae96d6b5c0c), C(f63bd1603ef80627),
-     C(76d0fec4)},
-    {C(395b7a8adb96ab75), C(582df7165b20f4a), C(e52bd30e9ff657f9), C(405e3402)},
-    {C(3822dd82c7df012f), C(b9029b40bd9f122b), C(fd25b988468266c4),
-     C(c732c481)},
-    {C(79f7efe4a80b951a), C(dd3a3fddfc6c9c41), C(ab4c812f9e27aa40),
-     C(a8d123c9)},
-    {C(ae6e59f5f055921a), C(e9d9b7bf68e82), C(5ce4e4a5b269cc59), C(1e80ad7d)},
-    {C(8959dbbf07387d36), C(b4658afce48ea35d), C(8f3f82437d8cb8d6),
-     C(52aeb863)},
-    {C(4739613234278a49), C(99ea5bcd340bf663), C(258640912e712b12),
-     C(ef7c0c18)},
-    {C(420e6c926bc54841), C(96dbbf6f4e7c75cd), C(d8d40fa70c3c67bb),
-     C(b6ad4b68)},
-    {C(c8601bab561bc1b7), C(72b26272a0ff869a), C(56fdfc986d6bc3c4),
-     C(c1e46b17)},
-    {C(b2d294931a0e20eb), C(284ffd9a0815bc38), C(1f8a103aac9bbe6), C(57b8df25)},
-    {C(7966f53c37b6c6d7), C(8e6abcfb3aa2b88f), C(7f2e5e0724e5f345),
-     C(e9fa36d6)},
-    {C(be9bb0abd03b7368), C(13bca93a3031be55), C(e864f4f52b55b472),
-     C(8f8daefc)},
-    {C(a08d128c5f1649be), C(a8166c3dbbe19aad), C(cb9f914f829ec62c), C(6e1bb7e)},
-    {C(7c386f0ffe0465ac), C(530419c9d843dbf3), C(7450e3a4f72b8d8c),
-     C(fd0076f0)},
-    {C(bb362094e7ef4f8), C(ff3c2a48966f9725), C(55152803acd4a7fe), C(899b17b6)},
-    {C(cd80dea24321eea4), C(52b4fdc8130c2b15), C(f3ea100b154bfb82),
-     C(e3e84e31)},
-    {C(d599a04125372c3a), C(313136c56a56f363), C(1e993c3677625832),
-     C(eef79b6b)},
-    {C(dbbf541e9dfda0a), C(1479fceb6db4f844), C(31ab576b59062534), C(868e3315)},
-    {C(c2ee3288be4fe2bf), C(c65d2f5ddf32b92), C(af6ecdf121ba5485), C(4639a426)},
-    {C(d86603ced1ed4730), C(f9de718aaada7709), C(db8b9755194c6535),
-     C(f3213646)},
-    {C(915263c671b28809), C(a815378e7ad762fd), C(abec6dc9b669f559),
-     C(17f148e9)},
-    {C(2b67cdd38c307a5e), C(cb1d45bb5c9fe1c), C(800baf2a02ec18ad), C(bfd94880)},
-    {C(2d107419073b9cd0), C(a96db0740cef8f54), C(ec41ee91b3ecdc1b),
-     C(bb1fa7f3)},
-    {C(f3e9487ec0e26dfc), C(1ab1f63224e837fa), C(119983bb5a8125d8), C(88816b1)},
-    {C(1160987c8fe86f7d), C(879e6db1481eb91b), C(d7dcb802bfe6885d),
-     C(5c2faeb3)},
-    {C(eab8112c560b967b), C(97f550b58e89dbae), C(846ed506d304051f),
-     C(51b5fc6f)},
-    {C(1addcf0386d35351), C(b5f436561f8f1484), C(85d38e22181c9bb1),
-     C(33d94752)},
-    {C(d445ba84bf803e09), C(1216c2497038f804), C(2293216ea2237207),
-     C(b0c92948)},
-    {C(37235a096a8be435), C(d9b73130493589c2), C(3b1024f59378d3be),
-     C(c7171590)},
-    {C(763ad6ea2fe1c99d), C(cf7af5368ac1e26b), C(4d5e451b3bb8d3d4),
-     C(240a67fb)},
-    {C(ea627fc84cd1b857), C(85e372494520071f), C(69ec61800845780b),
-     C(e1843cd5)},
-    {C(1f2ffd79f2cdc0c8), C(726a1bc31b337aaa), C(678b7f275ef96434),
-     C(fda1452b)},
-    {C(39a9e146ec4b3210), C(f63f75802a78b1ac), C(e2e22539c94741c3),
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-    {C(74cba303e2dd9d6d), C(692699b83289fad1), C(dfb9aa7874678480),
-     C(53467e16)},
-    {C(4cbc2b73a43071e0), C(56c5db4c4ca4e0b7), C(1b275a162f46bd3d),
-     C(da14a8d0)},
-    {C(875638b9715d2221), C(d9ba0615c0c58740), C(616d4be2dfe825aa),
-     C(67333551)},
-    {C(fb686b2782994a8d), C(edee60693756bb48), C(e6bc3cae0ded2ef5),
-     C(a0ebd66e)},
-    {C(ab21d81a911e6723), C(4c31b07354852f59), C(835da384c9384744),
-     C(4b769593)},
-    {C(33d013cc0cd46ecf), C(3de726423aea122c), C(116af51117fe21a9),
-     C(6aa75624)},
-    {C(8ca92c7cd39fae5d), C(317e620e1bf20f1), C(4f0b33bf2194b97f), C(602a3f96)},
-    {C(fdde3b03f018f43e), C(38f932946c78660), C(c84084ce946851ee), C(cd183c4d)},
-    {C(9c8502050e9c9458), C(d6d2a1a69964beb9), C(1675766f480229b5),
-     C(960a4d07)},
-    {C(348176ca2fa2fdd2), C(3a89c514cc360c2d), C(9f90b8afb318d6d0),
-     C(9ae998c4)},
-    {C(4a3d3dfbbaea130b), C(4e221c920f61ed01), C(553fd6cd1304531f),
-     C(74e2179d)},
-    {C(b371f768cdf4edb9), C(bdef2ace6d2de0f0), C(e05b4100f7f1baec),
-     C(ee9bae25)},
-    {C(7a1d2e96934f61f), C(eb1760ae6af7d961), C(887eb0da063005df), C(b66edf10)},
-    {C(8be53d466d4728f2), C(86a5ac8e0d416640), C(984aa464cdb5c8bb),
-     C(d6209737)},
-    {C(829677eb03abf042), C(43cad004b6bc2c0), C(f2f224756803971a), C(b994a88)},
-    {C(754435bae3496fc), C(5707fc006f094dcf), C(8951c86ab19d8e40), C(a05d43c0)},
-    {C(fda9877ea8e3805f), C(31e868b6ffd521b7), C(b08c90681fb6a0fd),
-     C(c79f73a8)},
-    {C(2e36f523ca8f5eb5), C(8b22932f89b27513), C(331cd6ecbfadc1bb),
-     C(a490aff5)},
-    {C(21a378ef76828208), C(a5c13037fa841da2), C(506d22a53fbe9812),
-     C(dfad65b4)},
-    {C(ccdd5600054b16ca), C(f78846e84204cb7b), C(1f9faec82c24eac9), C(1d07dfb)},
-    {C(7854468f4e0cabd0), C(3a3f6b4f098d0692), C(ae2423ec7799d30d),
-     C(416df9a0)},
-    {C(7f88db5346d8f997), C(88eac9aacc653798), C(68a4d0295f8eefa1),
-     C(1f8fb9cc)},
-    {C(bb3fb5fb01d60fcf), C(1b7cc0847a215eb6), C(1246c994437990a1),
-     C(7abf48e3)},
-    {C(2e783e1761acd84d), C(39158042bac975a0), C(1cd21c5a8071188d),
-     C(dea4e3dd)},
-    {C(392058251cf22acc), C(944ec4475ead4620), C(b330a10b5cb94166),
-     C(c6064f22)},
-    {C(adf5c1e5d6419947), C(2a9747bc659d28aa), C(95c5b8cb1f5d62c), C(743bed9c)},
-    {C(6bc1db2c2bee5aba), C(e63b0ed635307398), C(7b2eca111f30dbbc),
-     C(fce254d5)},
-    {C(b00f898229efa508), C(83b7590ad7f6985c), C(2780e70a0592e41d),
-     C(e47ec9d1)},
-    {C(b56eb769ce0d9a8c), C(ce196117bfbcaf04), C(b26c3c3797d66165),
-     C(334a145c)},
-    {C(70c0637675b94150), C(259e1669305b0a15), C(46e1dd9fd387a58d),
-     C(adec1e3c)},
-    {C(74c0b8a6821faafe), C(abac39d7491370e7), C(faf0b2a48a4e6aed),
-     C(f6a9fbf8)},
-    {C(5fb5e48ac7b7fa4f), C(a96170f08f5acbc7), C(bbf5c63d4f52a1e5),
-     C(5398210c)},
-};
-
-void TestUnchanging(const uint64_t* expected, int offset, int len) {
-  EXPECT_EQ(expected[0], CityHash64(data + offset, len));
-  EXPECT_EQ(expected[3], CityHash32(data + offset, len));
-  EXPECT_EQ(expected[1], CityHash64WithSeed(data + offset, len, kSeed0));
-  EXPECT_EQ(expected[2],
-            CityHash64WithSeeds(data + offset, len, kSeed0, kSeed1));
-}
-
-TEST(CityHashTest, Unchanging) {
-  setup();
-  int i = 0;
-  for (; i < kTestSize - 1; i++) {
-    TestUnchanging(testdata[i], i * i, i);
-  }
-  TestUnchanging(testdata[i], 0, kDataSize);
-}
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil_cpp/absl/hash/internal/hash.cc b/third_party/abseil_cpp/absl/hash/internal/hash.cc
deleted file mode 100644
index b44ecb3a6b66..000000000000
--- a/third_party/abseil_cpp/absl/hash/internal/hash.cc
+++ /dev/null
@@ -1,55 +0,0 @@
-// 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 "absl/hash/internal/hash.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-uint64_t CityHashState::CombineLargeContiguousImpl32(uint64_t state,
-                                                     const unsigned char* first,
-                                                     size_t len) {
-  while (len >= PiecewiseChunkSize()) {
-    state =
-        Mix(state, absl::hash_internal::CityHash32(reinterpret_cast<const char*>(first),
-                                         PiecewiseChunkSize()));
-    len -= PiecewiseChunkSize();
-    first += PiecewiseChunkSize();
-  }
-  // Handle the remainder.
-  return CombineContiguousImpl(state, first, len,
-                               std::integral_constant<int, 4>{});
-}
-
-uint64_t CityHashState::CombineLargeContiguousImpl64(uint64_t state,
-                                                     const unsigned char* first,
-                                                     size_t len) {
-  while (len >= PiecewiseChunkSize()) {
-    state =
-        Mix(state, absl::hash_internal::CityHash64(reinterpret_cast<const char*>(first),
-                                         PiecewiseChunkSize()));
-    len -= PiecewiseChunkSize();
-    first += PiecewiseChunkSize();
-  }
-  // Handle the remainder.
-  return CombineContiguousImpl(state, first, len,
-                               std::integral_constant<int, 8>{});
-}
-
-ABSL_CONST_INIT const void* const CityHashState::kSeed = &kSeed;
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
diff --git a/third_party/abseil_cpp/absl/hash/internal/hash.h b/third_party/abseil_cpp/absl/hash/internal/hash.h
deleted file mode 100644
index b0132da2069d..000000000000
--- a/third_party/abseil_cpp/absl/hash/internal/hash.h
+++ /dev/null
@@ -1,1003 +0,0 @@
-// 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.
-//
-// -----------------------------------------------------------------------------
-// File: hash.h
-// -----------------------------------------------------------------------------
-//
-#ifndef ABSL_HASH_INTERNAL_HASH_H_
-#define ABSL_HASH_INTERNAL_HASH_H_
-
-#include <algorithm>
-#include <array>
-#include <cmath>
-#include <cstring>
-#include <deque>
-#include <forward_list>
-#include <functional>
-#include <iterator>
-#include <limits>
-#include <list>
-#include <map>
-#include <memory>
-#include <set>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#include "absl/base/internal/endian.h"
-#include "absl/base/port.h"
-#include "absl/container/fixed_array.h"
-#include "absl/meta/type_traits.h"
-#include "absl/numeric/int128.h"
-#include "absl/strings/string_view.h"
-#include "absl/types/optional.h"
-#include "absl/types/variant.h"
-#include "absl/utility/utility.h"
-#include "absl/hash/internal/city.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-// Internal detail: Large buffers are hashed in smaller chunks.  This function
-// returns the size of these chunks.
-constexpr size_t PiecewiseChunkSize() { return 1024; }
-
-// PiecewiseCombiner
-//
-// PiecewiseCombiner is an internal-only helper class for hashing a piecewise
-// buffer of `char` or `unsigned char` as though it were contiguous.  This class
-// provides two methods:
-//
-//   H add_buffer(state, data, size)
-//   H finalize(state)
-//
-// `add_buffer` can be called zero or more times, followed by a single call to
-// `finalize`.  This will produce the same hash expansion as concatenating each
-// buffer piece into a single contiguous buffer, and passing this to
-// `H::combine_contiguous`.
-//
-//  Example usage:
-//    PiecewiseCombiner combiner;
-//    for (const auto& piece : pieces) {
-//      state = combiner.add_buffer(std::move(state), piece.data, piece.size);
-//    }
-//    return combiner.finalize(std::move(state));
-class PiecewiseCombiner {
- public:
-  PiecewiseCombiner() : position_(0) {}
-  PiecewiseCombiner(const PiecewiseCombiner&) = delete;
-  PiecewiseCombiner& operator=(const PiecewiseCombiner&) = delete;
-
-  // PiecewiseCombiner::add_buffer()
-  //
-  // Appends the given range of bytes to the sequence to be hashed, which may
-  // modify the provided hash state.
-  template <typename H>
-  H add_buffer(H state, const unsigned char* data, size_t size);
-  template <typename H>
-  H add_buffer(H state, const char* data, size_t size) {
-    return add_buffer(std::move(state),
-                      reinterpret_cast<const unsigned char*>(data), size);
-  }
-
-  // PiecewiseCombiner::finalize()
-  //
-  // Finishes combining the hash sequence, which may may modify the provided
-  // hash state.
-  //
-  // Once finalize() is called, add_buffer() may no longer be called. The
-  // resulting hash state will be the same as if the pieces passed to
-  // add_buffer() were concatenated into a single flat buffer, and then provided
-  // to H::combine_contiguous().
-  template <typename H>
-  H finalize(H state);
-
- private:
-  unsigned char buf_[PiecewiseChunkSize()];
-  size_t position_;
-};
-
-// HashStateBase
-//
-// A hash state object represents an intermediate state in the computation
-// of an unspecified hash algorithm. `HashStateBase` provides a CRTP style
-// base class for hash state implementations. Developers adding type support
-// for `absl::Hash` should not rely on any parts of the state object other than
-// the following member functions:
-//
-//   * HashStateBase::combine()
-//   * HashStateBase::combine_contiguous()
-//
-// A derived hash state class of type `H` must provide a static member function
-// with a signature similar to the following:
-//
-//    `static H combine_contiguous(H state, const unsigned char*, size_t)`.
-//
-// `HashStateBase` will provide a complete implementation for a hash state
-// object in terms of this method.
-//
-// Example:
-//
-//   // Use CRTP to define your derived class.
-//   struct MyHashState : HashStateBase<MyHashState> {
-//       static H combine_contiguous(H state, const unsigned char*, size_t);
-//       using MyHashState::HashStateBase::combine;
-//       using MyHashState::HashStateBase::combine_contiguous;
-//   };
-template <typename H>
-class HashStateBase {
- public:
-  // HashStateBase::combine()
-  //
-  // Combines an arbitrary number of values into a hash state, returning the
-  // updated state.
-  //
-  // Each of the value types `T` must be separately hashable by the Abseil
-  // hashing framework.
-  //
-  // NOTE:
-  //
-  //   state = H::combine(std::move(state), value1, value2, value3);
-  //
-  // is guaranteed to produce the same hash expansion as:
-  //
-  //   state = H::combine(std::move(state), value1);
-  //   state = H::combine(std::move(state), value2);
-  //   state = H::combine(std::move(state), value3);
-  template <typename T, typename... Ts>
-  static H combine(H state, const T& value, const Ts&... values);
-  static H combine(H state) { return state; }
-
-  // HashStateBase::combine_contiguous()
-  //
-  // Combines a contiguous array of `size` elements into a hash state, returning
-  // the updated state.
-  //
-  // NOTE:
-  //
-  //   state = H::combine_contiguous(std::move(state), data, size);
-  //
-  // is NOT guaranteed to produce the same hash expansion as a for-loop (it may
-  // perform internal optimizations).  If you need this guarantee, use the
-  // for-loop instead.
-  template <typename T>
-  static H combine_contiguous(H state, const T* data, size_t size);
-
-  using AbslInternalPiecewiseCombiner = PiecewiseCombiner;
-};
-
-// is_uniquely_represented
-//
-// `is_uniquely_represented<T>` is a trait class that indicates whether `T`
-// is uniquely represented.
-//
-// A type is "uniquely represented" if two equal values of that type are
-// guaranteed to have the same bytes in their underlying storage. In other
-// words, if `a == b`, then `memcmp(&a, &b, sizeof(T))` is guaranteed to be
-// zero. This property cannot be detected automatically, so this trait is false
-// by default, but can be specialized by types that wish to assert that they are
-// uniquely represented. This makes them eligible for certain optimizations.
-//
-// If you have any doubt whatsoever, do not specialize this template.
-// The default is completely safe, and merely disables some optimizations
-// that will not matter for most types. Specializing this template,
-// on the other hand, can be very hazardous.
-//
-// To be uniquely represented, a type must not have multiple ways of
-// representing the same value; for example, float and double are not
-// uniquely represented, because they have distinct representations for
-// +0 and -0. Furthermore, the type's byte representation must consist
-// solely of user-controlled data, with no padding bits and no compiler-
-// controlled data such as vptrs or sanitizer metadata. This is usually
-// very difficult to guarantee, because in most cases the compiler can
-// insert data and padding bits at its own discretion.
-//
-// If you specialize this template for a type `T`, you must do so in the file
-// that defines that type (or in this file). If you define that specialization
-// anywhere else, `is_uniquely_represented<T>` could have different meanings
-// in different places.
-//
-// The Enable parameter is meaningless; it is provided as a convenience,
-// to support certain SFINAE techniques when defining specializations.
-template <typename T, typename Enable = void>
-struct is_uniquely_represented : std::false_type {};
-
-// is_uniquely_represented<unsigned char>
-//
-// unsigned char is a synonym for "byte", so it is guaranteed to be
-// uniquely represented.
-template <>
-struct is_uniquely_represented<unsigned char> : std::true_type {};
-
-// is_uniquely_represented for non-standard integral types
-//
-// Integral types other than bool should be uniquely represented on any
-// platform that this will plausibly be ported to.
-template <typename Integral>
-struct is_uniquely_represented<
-    Integral, typename std::enable_if<std::is_integral<Integral>::value>::type>
-    : std::true_type {};
-
-// is_uniquely_represented<bool>
-//
-//
-template <>
-struct is_uniquely_represented<bool> : std::false_type {};
-
-// hash_bytes()
-//
-// Convenience function that combines `hash_state` with the byte representation
-// of `value`.
-template <typename H, typename T>
-H hash_bytes(H hash_state, const T& value) {
-  const unsigned char* start = reinterpret_cast<const unsigned char*>(&value);
-  return H::combine_contiguous(std::move(hash_state), start, sizeof(value));
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Basic Types
-// -----------------------------------------------------------------------------
-
-// Note: Default `AbslHashValue` implementations live in `hash_internal`. This
-// allows us to block lexical scope lookup when doing an unqualified call to
-// `AbslHashValue` below. User-defined implementations of `AbslHashValue` can
-// only be found via ADL.
-
-// AbslHashValue() for hashing bool values
-//
-// We use SFINAE to ensure that this overload only accepts bool, not types that
-// are convertible to bool.
-template <typename H, typename B>
-typename std::enable_if<std::is_same<B, bool>::value, H>::type AbslHashValue(
-    H hash_state, B value) {
-  return H::combine(std::move(hash_state),
-                    static_cast<unsigned char>(value ? 1 : 0));
-}
-
-// AbslHashValue() for hashing enum values
-template <typename H, typename Enum>
-typename std::enable_if<std::is_enum<Enum>::value, H>::type AbslHashValue(
-    H hash_state, Enum e) {
-  // In practice, we could almost certainly just invoke hash_bytes directly,
-  // but it's possible that a sanitizer might one day want to
-  // store data in the unused bits of an enum. To avoid that risk, we
-  // convert to the underlying type before hashing. Hopefully this will get
-  // optimized away; if not, we can reopen discussion with c-toolchain-team.
-  return H::combine(std::move(hash_state),
-                    static_cast<typename std::underlying_type<Enum>::type>(e));
-}
-// AbslHashValue() for hashing floating-point values
-template <typename H, typename Float>
-typename std::enable_if<std::is_same<Float, float>::value ||
-                            std::is_same<Float, double>::value,
-                        H>::type
-AbslHashValue(H hash_state, Float value) {
-  return hash_internal::hash_bytes(std::move(hash_state),
-                                   value == 0 ? 0 : value);
-}
-
-// Long double has the property that it might have extra unused bytes in it.
-// For example, in x86 sizeof(long double)==16 but it only really uses 80-bits
-// of it. This means we can't use hash_bytes on a long double and have to
-// convert it to something else first.
-template <typename H, typename LongDouble>
-typename std::enable_if<std::is_same<LongDouble, long double>::value, H>::type
-AbslHashValue(H hash_state, LongDouble value) {
-  const int category = std::fpclassify(value);
-  switch (category) {
-    case FP_INFINITE:
-      // Add the sign bit to differentiate between +Inf and -Inf
-      hash_state = H::combine(std::move(hash_state), std::signbit(value));
-      break;
-
-    case FP_NAN:
-    case FP_ZERO:
-    default:
-      // Category is enough for these.
-      break;
-
-    case FP_NORMAL:
-    case FP_SUBNORMAL:
-      // We can't convert `value` directly to double because this would have
-      // undefined behavior if the value is out of range.
-      // std::frexp gives us a value in the range (-1, -.5] or [.5, 1) that is
-      // guaranteed to be in range for `double`. The truncation is
-      // implementation defined, but that works as long as it is deterministic.
-      int exp;
-      auto mantissa = static_cast<double>(std::frexp(value, &exp));
-      hash_state = H::combine(std::move(hash_state), mantissa, exp);
-  }
-
-  return H::combine(std::move(hash_state), category);
-}
-
-// AbslHashValue() for hashing pointers
-template <typename H, typename T>
-H AbslHashValue(H hash_state, T* ptr) {
-  auto v = reinterpret_cast<uintptr_t>(ptr);
-  // Due to alignment, pointers tend to have low bits as zero, and the next few
-  // bits follow a pattern since they are also multiples of some base value.
-  // Mixing the pointer twice helps prevent stuck low bits for certain alignment
-  // values.
-  return H::combine(std::move(hash_state), v, v);
-}
-
-// AbslHashValue() for hashing nullptr_t
-template <typename H>
-H AbslHashValue(H hash_state, std::nullptr_t) {
-  return H::combine(std::move(hash_state), static_cast<void*>(nullptr));
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Composite Types
-// -----------------------------------------------------------------------------
-
-// is_hashable()
-//
-// Trait class which returns true if T is hashable by the absl::Hash framework.
-// Used for the AbslHashValue implementations for composite types below.
-template <typename T>
-struct is_hashable;
-
-// AbslHashValue() for hashing pairs
-template <typename H, typename T1, typename T2>
-typename std::enable_if<is_hashable<T1>::value && is_hashable<T2>::value,
-                        H>::type
-AbslHashValue(H hash_state, const std::pair<T1, T2>& p) {
-  return H::combine(std::move(hash_state), p.first, p.second);
-}
-
-// hash_tuple()
-//
-// Helper function for hashing a tuple. The third argument should
-// be an index_sequence running from 0 to tuple_size<Tuple> - 1.
-template <typename H, typename Tuple, size_t... Is>
-H hash_tuple(H hash_state, const Tuple& t, absl::index_sequence<Is...>) {
-  return H::combine(std::move(hash_state), std::get<Is>(t)...);
-}
-
-// AbslHashValue for hashing tuples
-template <typename H, typename... Ts>
-#if defined(_MSC_VER)
-// This SFINAE gets MSVC confused under some conditions. Let's just disable it
-// for now.
-H
-#else  // _MSC_VER
-typename std::enable_if<absl::conjunction<is_hashable<Ts>...>::value, H>::type
-#endif  // _MSC_VER
-AbslHashValue(H hash_state, const std::tuple<Ts...>& t) {
-  return hash_internal::hash_tuple(std::move(hash_state), t,
-                                   absl::make_index_sequence<sizeof...(Ts)>());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Pointers
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing unique_ptr
-template <typename H, typename T, typename D>
-H AbslHashValue(H hash_state, const std::unique_ptr<T, D>& ptr) {
-  return H::combine(std::move(hash_state), ptr.get());
-}
-
-// AbslHashValue for hashing shared_ptr
-template <typename H, typename T>
-H AbslHashValue(H hash_state, const std::shared_ptr<T>& ptr) {
-  return H::combine(std::move(hash_state), ptr.get());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for String-Like Types
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing strings
-//
-// All the string-like types supported here provide the same hash expansion for
-// the same character sequence. These types are:
-//
-//  - `absl::Cord`
-//  - `std::string` (and std::basic_string<char, std::char_traits<char>, A> for
-//      any allocator A)
-//  - `absl::string_view` and `std::string_view`
-//
-// For simplicity, we currently support only `char` strings. This support may
-// be broadened, if necessary, but with some caution - this overload would
-// misbehave in cases where the traits' `eq()` member isn't equivalent to `==`
-// on the underlying character type.
-template <typename H>
-H AbslHashValue(H hash_state, absl::string_view str) {
-  return H::combine(
-      H::combine_contiguous(std::move(hash_state), str.data(), str.size()),
-      str.size());
-}
-
-// Support std::wstring, std::u16string and std::u32string.
-template <typename Char, typename Alloc, typename H,
-          typename = absl::enable_if_t<std::is_same<Char, wchar_t>::value ||
-                                       std::is_same<Char, char16_t>::value ||
-                                       std::is_same<Char, char32_t>::value>>
-H AbslHashValue(
-    H hash_state,
-    const std::basic_string<Char, std::char_traits<Char>, Alloc>& str) {
-  return H::combine(
-      H::combine_contiguous(std::move(hash_state), str.data(), str.size()),
-      str.size());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Sequence Containers
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing std::array
-template <typename H, typename T, size_t N>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, const std::array<T, N>& array) {
-  return H::combine_contiguous(std::move(hash_state), array.data(),
-                               array.size());
-}
-
-// AbslHashValue for hashing std::deque
-template <typename H, typename T, typename Allocator>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, const std::deque<T, Allocator>& deque) {
-  // TODO(gromer): investigate a more efficient implementation taking
-  // advantage of the chunk structure.
-  for (const auto& t : deque) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), deque.size());
-}
-
-// AbslHashValue for hashing std::forward_list
-template <typename H, typename T, typename Allocator>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, const std::forward_list<T, Allocator>& list) {
-  size_t size = 0;
-  for (const T& t : list) {
-    hash_state = H::combine(std::move(hash_state), t);
-    ++size;
-  }
-  return H::combine(std::move(hash_state), size);
-}
-
-// AbslHashValue for hashing std::list
-template <typename H, typename T, typename Allocator>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, const std::list<T, Allocator>& list) {
-  for (const auto& t : list) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), list.size());
-}
-
-// AbslHashValue for hashing std::vector
-//
-// Do not use this for vector<bool>. It does not have a .data(), and a fallback
-// for std::hash<> is most likely faster.
-template <typename H, typename T, typename Allocator>
-typename std::enable_if<is_hashable<T>::value && !std::is_same<T, bool>::value,
-                        H>::type
-AbslHashValue(H hash_state, const std::vector<T, Allocator>& vector) {
-  return H::combine(H::combine_contiguous(std::move(hash_state), vector.data(),
-                                          vector.size()),
-                    vector.size());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Ordered Associative Containers
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing std::map
-template <typename H, typename Key, typename T, typename Compare,
-          typename Allocator>
-typename std::enable_if<is_hashable<Key>::value && is_hashable<T>::value,
-                        H>::type
-AbslHashValue(H hash_state, const std::map<Key, T, Compare, Allocator>& map) {
-  for (const auto& t : map) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), map.size());
-}
-
-// AbslHashValue for hashing std::multimap
-template <typename H, typename Key, typename T, typename Compare,
-          typename Allocator>
-typename std::enable_if<is_hashable<Key>::value && is_hashable<T>::value,
-                        H>::type
-AbslHashValue(H hash_state,
-              const std::multimap<Key, T, Compare, Allocator>& map) {
-  for (const auto& t : map) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), map.size());
-}
-
-// AbslHashValue for hashing std::set
-template <typename H, typename Key, typename Compare, typename Allocator>
-typename std::enable_if<is_hashable<Key>::value, H>::type AbslHashValue(
-    H hash_state, const std::set<Key, Compare, Allocator>& set) {
-  for (const auto& t : set) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), set.size());
-}
-
-// AbslHashValue for hashing std::multiset
-template <typename H, typename Key, typename Compare, typename Allocator>
-typename std::enable_if<is_hashable<Key>::value, H>::type AbslHashValue(
-    H hash_state, const std::multiset<Key, Compare, Allocator>& set) {
-  for (const auto& t : set) {
-    hash_state = H::combine(std::move(hash_state), t);
-  }
-  return H::combine(std::move(hash_state), set.size());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Wrapper Types
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing std::reference_wrapper
-template <typename H, typename T>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, std::reference_wrapper<T> opt) {
-  return H::combine(std::move(hash_state), opt.get());
-}
-
-// AbslHashValue for hashing absl::optional
-template <typename H, typename T>
-typename std::enable_if<is_hashable<T>::value, H>::type AbslHashValue(
-    H hash_state, const absl::optional<T>& opt) {
-  if (opt) hash_state = H::combine(std::move(hash_state), *opt);
-  return H::combine(std::move(hash_state), opt.has_value());
-}
-
-// VariantVisitor
-template <typename H>
-struct VariantVisitor {
-  H&& hash_state;
-  template <typename T>
-  H operator()(const T& t) const {
-    return H::combine(std::move(hash_state), t);
-  }
-};
-
-// AbslHashValue for hashing absl::variant
-template <typename H, typename... T>
-typename std::enable_if<conjunction<is_hashable<T>...>::value, H>::type
-AbslHashValue(H hash_state, const absl::variant<T...>& v) {
-  if (!v.valueless_by_exception()) {
-    hash_state = absl::visit(VariantVisitor<H>{std::move(hash_state)}, v);
-  }
-  return H::combine(std::move(hash_state), v.index());
-}
-
-// -----------------------------------------------------------------------------
-// AbslHashValue for Other Types
-// -----------------------------------------------------------------------------
-
-// AbslHashValue for hashing std::bitset is not defined, for the same reason as
-// for vector<bool> (see std::vector above): It does not expose the raw bytes,
-// and a fallback to std::hash<> is most likely faster.
-
-// -----------------------------------------------------------------------------
-
-// hash_range_or_bytes()
-//
-// Mixes all values in the range [data, data+size) into the hash state.
-// This overload accepts only uniquely-represented types, and hashes them by
-// hashing the entire range of bytes.
-template <typename H, typename T>
-typename std::enable_if<is_uniquely_represented<T>::value, H>::type
-hash_range_or_bytes(H hash_state, const T* data, size_t size) {
-  const auto* bytes = reinterpret_cast<const unsigned char*>(data);
-  return H::combine_contiguous(std::move(hash_state), bytes, sizeof(T) * size);
-}
-
-// hash_range_or_bytes()
-template <typename H, typename T>
-typename std::enable_if<!is_uniquely_represented<T>::value, H>::type
-hash_range_or_bytes(H hash_state, const T* data, size_t size) {
-  for (const auto end = data + size; data < end; ++data) {
-    hash_state = H::combine(std::move(hash_state), *data);
-  }
-  return hash_state;
-}
-
-#if defined(ABSL_INTERNAL_LEGACY_HASH_NAMESPACE) && \
-    ABSL_META_INTERNAL_STD_HASH_SFINAE_FRIENDLY_
-#define ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_ 1
-#else
-#define ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_ 0
-#endif
-
-// HashSelect
-//
-// Type trait to select the appropriate hash implementation to use.
-// HashSelect::type<T> will give the proper hash implementation, to be invoked
-// as:
-//   HashSelect::type<T>::Invoke(state, value)
-// Also, HashSelect::type<T>::value is a boolean equal to `true` if there is a
-// valid `Invoke` function. Types that are not hashable will have a ::value of
-// `false`.
-struct HashSelect {
- private:
-  struct State : HashStateBase<State> {
-    static State combine_contiguous(State hash_state, const unsigned char*,
-                                    size_t);
-    using State::HashStateBase::combine_contiguous;
-  };
-
-  struct UniquelyRepresentedProbe {
-    template <typename H, typename T>
-    static auto Invoke(H state, const T& value)
-        -> absl::enable_if_t<is_uniquely_represented<T>::value, H> {
-      return hash_internal::hash_bytes(std::move(state), value);
-    }
-  };
-
-  struct HashValueProbe {
-    template <typename H, typename T>
-    static auto Invoke(H state, const T& value) -> absl::enable_if_t<
-        std::is_same<H,
-                     decltype(AbslHashValue(std::move(state), value))>::value,
-        H> {
-      return AbslHashValue(std::move(state), value);
-    }
-  };
-
-  struct LegacyHashProbe {
-#if ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_
-    template <typename H, typename T>
-    static auto Invoke(H state, const T& value) -> absl::enable_if_t<
-        std::is_convertible<
-            decltype(ABSL_INTERNAL_LEGACY_HASH_NAMESPACE::hash<T>()(value)),
-            size_t>::value,
-        H> {
-      return hash_internal::hash_bytes(
-          std::move(state),
-          ABSL_INTERNAL_LEGACY_HASH_NAMESPACE::hash<T>{}(value));
-    }
-#endif  // ABSL_HASH_INTERNAL_SUPPORT_LEGACY_HASH_
-  };
-
-  struct StdHashProbe {
-    template <typename H, typename T>
-    static auto Invoke(H state, const T& value)
-        -> absl::enable_if_t<type_traits_internal::IsHashable<T>::value, H> {
-      return hash_internal::hash_bytes(std::move(state), std::hash<T>{}(value));
-    }
-  };
-
-  template <typename Hash, typename T>
-  struct Probe : Hash {
-   private:
-    template <typename H, typename = decltype(H::Invoke(
-                              std::declval<State>(), std::declval<const T&>()))>
-    static std::true_type Test(int);
-    template <typename U>
-    static std::false_type Test(char);
-
-   public:
-    static constexpr bool value = decltype(Test<Hash>(0))::value;
-  };
-
- public:
-  // Probe each implementation in order.
-  // disjunction provides short circuiting wrt instantiation.
-  template <typename T>
-  using Apply = absl::disjunction<         //
-      Probe<UniquelyRepresentedProbe, T>,  //
-      Probe<HashValueProbe, T>,            //
-      Probe<LegacyHashProbe, T>,           //
-      Probe<StdHashProbe, T>,              //
-      std::false_type>;
-};
-
-template <typename T>
-struct is_hashable
-    : std::integral_constant<bool, HashSelect::template Apply<T>::value> {};
-
-// CityHashState
-class ABSL_DLL CityHashState
-    : public HashStateBase<CityHashState> {
-  // absl::uint128 is not an alias or a thin wrapper around the intrinsic.
-  // We use the intrinsic when available to improve performance.
-#ifdef ABSL_HAVE_INTRINSIC_INT128
-  using uint128 = __uint128_t;
-#else   // ABSL_HAVE_INTRINSIC_INT128
-  using uint128 = absl::uint128;
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-  static constexpr uint64_t kMul =
-      sizeof(size_t) == 4 ? uint64_t{0xcc9e2d51}
-                          : uint64_t{0x9ddfea08eb382d69};
-
-  template <typename T>
-  using IntegralFastPath =
-      conjunction<std::is_integral<T>, is_uniquely_represented<T>>;
-
- public:
-  // Move only
-  CityHashState(CityHashState&&) = default;
-  CityHashState& operator=(CityHashState&&) = default;
-
-  // CityHashState::combine_contiguous()
-  //
-  // Fundamental base case for hash recursion: mixes the given range of bytes
-  // into the hash state.
-  static CityHashState combine_contiguous(CityHashState hash_state,
-                                          const unsigned char* first,
-                                          size_t size) {
-    return CityHashState(
-        CombineContiguousImpl(hash_state.state_, first, size,
-                              std::integral_constant<int, sizeof(size_t)>{}));
-  }
-  using CityHashState::HashStateBase::combine_contiguous;
-
-  // CityHashState::hash()
-  //
-  // For performance reasons in non-opt mode, we specialize this for
-  // integral types.
-  // Otherwise we would be instantiating and calling dozens of functions for
-  // something that is just one multiplication and a couple xor's.
-  // The result should be the same as running the whole algorithm, but faster.
-  template <typename T, absl::enable_if_t<IntegralFastPath<T>::value, int> = 0>
-  static size_t hash(T value) {
-    return static_cast<size_t>(Mix(Seed(), static_cast<uint64_t>(value)));
-  }
-
-  // Overload of CityHashState::hash()
-  template <typename T, absl::enable_if_t<!IntegralFastPath<T>::value, int> = 0>
-  static size_t hash(const T& value) {
-    return static_cast<size_t>(combine(CityHashState{}, value).state_);
-  }
-
- private:
-  // Invoked only once for a given argument; that plus the fact that this is
-  // move-only ensures that there is only one non-moved-from object.
-  CityHashState() : state_(Seed()) {}
-
-  // Workaround for MSVC bug.
-  // We make the type copyable to fix the calling convention, even though we
-  // never actually copy it. Keep it private to not affect the public API of the
-  // type.
-  CityHashState(const CityHashState&) = default;
-
-  explicit CityHashState(uint64_t state) : state_(state) {}
-
-  // Implementation of the base case for combine_contiguous where we actually
-  // mix the bytes into the state.
-  // Dispatch to different implementations of the combine_contiguous depending
-  // on the value of `sizeof(size_t)`.
-  static uint64_t CombineContiguousImpl(uint64_t state,
-                                        const unsigned char* first, size_t len,
-                                        std::integral_constant<int, 4>
-                                        /* sizeof_size_t */);
-  static uint64_t CombineContiguousImpl(uint64_t state,
-                                        const unsigned char* first, size_t len,
-                                        std::integral_constant<int, 8>
-                                        /* sizeof_size_t*/);
-
-  // Slow dispatch path for calls to CombineContiguousImpl with a size argument
-  // larger than PiecewiseChunkSize().  Has the same effect as calling
-  // CombineContiguousImpl() repeatedly with the chunk stride size.
-  static uint64_t CombineLargeContiguousImpl32(uint64_t state,
-                                               const unsigned char* first,
-                                               size_t len);
-  static uint64_t CombineLargeContiguousImpl64(uint64_t state,
-                                               const unsigned char* first,
-                                               size_t len);
-
-  // Reads 9 to 16 bytes from p.
-  // The first 8 bytes are in .first, the rest (zero padded) bytes are in
-  // .second.
-  static std::pair<uint64_t, uint64_t> Read9To16(const unsigned char* p,
-                                                 size_t len) {
-    uint64_t high = little_endian::Load64(p + len - 8);
-    return {little_endian::Load64(p), high >> (128 - len * 8)};
-  }
-
-  // Reads 4 to 8 bytes from p. Zero pads to fill uint64_t.
-  static uint64_t Read4To8(const unsigned char* p, size_t len) {
-    return (static_cast<uint64_t>(little_endian::Load32(p + len - 4))
-            << (len - 4) * 8) |
-           little_endian::Load32(p);
-  }
-
-  // Reads 1 to 3 bytes from p. Zero pads to fill uint32_t.
-  static uint32_t Read1To3(const unsigned char* p, size_t len) {
-    return static_cast<uint32_t>((p[0]) |                         //
-                                 (p[len / 2] << (len / 2 * 8)) |  //
-                                 (p[len - 1] << ((len - 1) * 8)));
-  }
-
-  ABSL_ATTRIBUTE_ALWAYS_INLINE static uint64_t Mix(uint64_t state, uint64_t v) {
-    using MultType =
-        absl::conditional_t<sizeof(size_t) == 4, uint64_t, uint128>;
-    // We do the addition in 64-bit space to make sure the 128-bit
-    // multiplication is fast. If we were to do it as MultType the compiler has
-    // to assume that the high word is non-zero and needs to perform 2
-    // multiplications instead of one.
-    MultType m = state + v;
-    m *= kMul;
-    return static_cast<uint64_t>(m ^ (m >> (sizeof(m) * 8 / 2)));
-  }
-
-  // Seed()
-  //
-  // A non-deterministic seed.
-  //
-  // The current purpose of this seed is to generate non-deterministic results
-  // and prevent having users depend on the particular hash values.
-  // It is not meant as a security feature right now, but it leaves the door
-  // open to upgrade it to a true per-process random seed. A true random seed
-  // costs more and we don't need to pay for that right now.
-  //
-  // On platforms with ASLR, we take advantage of it to make a per-process
-  // random value.
-  // See https://en.wikipedia.org/wiki/Address_space_layout_randomization
-  //
-  // On other platforms this is still going to be non-deterministic but most
-  // probably per-build and not per-process.
-  ABSL_ATTRIBUTE_ALWAYS_INLINE static uint64_t Seed() {
-#if (!defined(__clang__) || __clang_major__ > 11) && \
-    !defined(__apple_build_version__)
-    return static_cast<uint64_t>(reinterpret_cast<uintptr_t>(&kSeed));
-#else
-    // Workaround the absence of
-    // https://github.com/llvm/llvm-project/commit/bc15bf66dcca76cc06fe71fca35b74dc4d521021.
-    return static_cast<uint64_t>(reinterpret_cast<uintptr_t>(kSeed));
-#endif
-  }
-  static const void* const kSeed;
-
-  uint64_t state_;
-};
-
-// CityHashState::CombineContiguousImpl()
-inline uint64_t CityHashState::CombineContiguousImpl(
-    uint64_t state, const unsigned char* first, size_t len,
-    std::integral_constant<int, 4> /* sizeof_size_t */) {
-  // For large values we use CityHash, for small ones we just use a
-  // multiplicative hash.
-  uint64_t v;
-  if (len > 8) {
-    if (ABSL_PREDICT_FALSE(len > PiecewiseChunkSize())) {
-      return CombineLargeContiguousImpl32(state, first, len);
-    }
-    v = absl::hash_internal::CityHash32(reinterpret_cast<const char*>(first), len);
-  } else if (len >= 4) {
-    v = Read4To8(first, len);
-  } else if (len > 0) {
-    v = Read1To3(first, len);
-  } else {
-    // Empty ranges have no effect.
-    return state;
-  }
-  return Mix(state, v);
-}
-
-// Overload of CityHashState::CombineContiguousImpl()
-inline uint64_t CityHashState::CombineContiguousImpl(
-    uint64_t state, const unsigned char* first, size_t len,
-    std::integral_constant<int, 8> /* sizeof_size_t */) {
-  // For large values we use CityHash, for small ones we just use a
-  // multiplicative hash.
-  uint64_t v;
-  if (len > 16) {
-    if (ABSL_PREDICT_FALSE(len > PiecewiseChunkSize())) {
-      return CombineLargeContiguousImpl64(state, first, len);
-    }
-    v = absl::hash_internal::CityHash64(reinterpret_cast<const char*>(first), len);
-  } else if (len > 8) {
-    auto p = Read9To16(first, len);
-    state = Mix(state, p.first);
-    v = p.second;
-  } else if (len >= 4) {
-    v = Read4To8(first, len);
-  } else if (len > 0) {
-    v = Read1To3(first, len);
-  } else {
-    // Empty ranges have no effect.
-    return state;
-  }
-  return Mix(state, v);
-}
-
-struct AggregateBarrier {};
-
-// HashImpl
-
-// Add a private base class to make sure this type is not an aggregate.
-// Aggregates can be aggregate initialized even if the default constructor is
-// deleted.
-struct PoisonedHash : private AggregateBarrier {
-  PoisonedHash() = delete;
-  PoisonedHash(const PoisonedHash&) = delete;
-  PoisonedHash& operator=(const PoisonedHash&) = delete;
-};
-
-template <typename T>
-struct HashImpl {
-  size_t operator()(const T& value) const { return CityHashState::hash(value); }
-};
-
-template <typename T>
-struct Hash
-    : absl::conditional_t<is_hashable<T>::value, HashImpl<T>, PoisonedHash> {};
-
-template <typename H>
-template <typename T, typename... Ts>
-H HashStateBase<H>::combine(H state, const T& value, const Ts&... values) {
-  return H::combine(hash_internal::HashSelect::template Apply<T>::Invoke(
-                        std::move(state), value),
-                    values...);
-}
-
-// HashStateBase::combine_contiguous()
-template <typename H>
-template <typename T>
-H HashStateBase<H>::combine_contiguous(H state, const T* data, size_t size) {
-  return hash_internal::hash_range_or_bytes(std::move(state), data, size);
-}
-
-// HashStateBase::PiecewiseCombiner::add_buffer()
-template <typename H>
-H PiecewiseCombiner::add_buffer(H state, const unsigned char* data,
-                                size_t size) {
-  if (position_ + size < PiecewiseChunkSize()) {
-    // This partial chunk does not fill our existing buffer
-    memcpy(buf_ + position_, data, size);
-    position_ += size;
-    return state;
-  }
-
-  // If the buffer is partially filled we need to complete the buffer
-  // and hash it.
-  if (position_ != 0) {
-    const size_t bytes_needed = PiecewiseChunkSize() - position_;
-    memcpy(buf_ + position_, data, bytes_needed);
-    state = H::combine_contiguous(std::move(state), buf_, PiecewiseChunkSize());
-    data += bytes_needed;
-    size -= bytes_needed;
-  }
-
-  // Hash whatever chunks we can without copying
-  while (size >= PiecewiseChunkSize()) {
-    state = H::combine_contiguous(std::move(state), data, PiecewiseChunkSize());
-    data += PiecewiseChunkSize();
-    size -= PiecewiseChunkSize();
-  }
-  // Fill the buffer with the remainder
-  memcpy(buf_, data, size);
-  position_ = size;
-  return state;
-}
-
-// HashStateBase::PiecewiseCombiner::finalize()
-template <typename H>
-H PiecewiseCombiner::finalize(H state) {
-  // Hash the remainder left in the buffer, which may be empty
-  return H::combine_contiguous(std::move(state), buf_, position_);
-}
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HASH_INTERNAL_HASH_H_
diff --git a/third_party/abseil_cpp/absl/hash/internal/print_hash_of.cc b/third_party/abseil_cpp/absl/hash/internal/print_hash_of.cc
deleted file mode 100644
index c392125a69fa..000000000000
--- a/third_party/abseil_cpp/absl/hash/internal/print_hash_of.cc
+++ /dev/null
@@ -1,23 +0,0 @@
-// 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 <cstdlib>
-
-#include "absl/hash/hash.h"
-
-// Prints the hash of argv[1].
-int main(int argc, char** argv) {
-  if (argc < 2) return 1;
-  printf("%zu\n", absl::Hash<int>{}(std::atoi(argv[1])));  // NOLINT
-}
diff --git a/third_party/abseil_cpp/absl/hash/internal/spy_hash_state.h b/third_party/abseil_cpp/absl/hash/internal/spy_hash_state.h
deleted file mode 100644
index c08312081180..000000000000
--- a/third_party/abseil_cpp/absl/hash/internal/spy_hash_state.h
+++ /dev/null
@@ -1,231 +0,0 @@
-// 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.
-
-#ifndef ABSL_HASH_INTERNAL_SPY_HASH_STATE_H_
-#define ABSL_HASH_INTERNAL_SPY_HASH_STATE_H_
-
-#include <ostream>
-#include <string>
-#include <vector>
-
-#include "absl/hash/hash.h"
-#include "absl/strings/match.h"
-#include "absl/strings/str_format.h"
-#include "absl/strings/str_join.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace hash_internal {
-
-// SpyHashState is an implementation of the HashState API that simply
-// accumulates all input bytes in an internal buffer. This makes it useful
-// for testing AbslHashValue overloads (so long as they are templated on the
-// HashState parameter), since it can report the exact hash representation
-// that the AbslHashValue overload produces.
-//
-// Sample usage:
-// EXPECT_EQ(SpyHashState::combine(SpyHashState(), foo),
-//           SpyHashState::combine(SpyHashState(), bar));
-template <typename T>
-class SpyHashStateImpl : public HashStateBase<SpyHashStateImpl<T>> {
- public:
-  SpyHashStateImpl() : error_(std::make_shared<absl::optional<std::string>>()) {
-    static_assert(std::is_void<T>::value, "");
-  }
-
-  // Move-only
-  SpyHashStateImpl(const SpyHashStateImpl&) = delete;
-  SpyHashStateImpl& operator=(const SpyHashStateImpl&) = delete;
-
-  SpyHashStateImpl(SpyHashStateImpl&& other) noexcept {
-    *this = std::move(other);
-  }
-
-  SpyHashStateImpl& operator=(SpyHashStateImpl&& other) noexcept {
-    hash_representation_ = std::move(other.hash_representation_);
-    error_ = other.error_;
-    moved_from_ = other.moved_from_;
-    other.moved_from_ = true;
-    return *this;
-  }
-
-  template <typename U>
-  SpyHashStateImpl(SpyHashStateImpl<U>&& other) {  // NOLINT
-    hash_representation_ = std::move(other.hash_representation_);
-    error_ = other.error_;
-    moved_from_ = other.moved_from_;
-    other.moved_from_ = true;
-  }
-
-  template <typename A, typename... Args>
-  static SpyHashStateImpl combine(SpyHashStateImpl s, const A& a,
-                                  const Args&... args) {
-    // Pass an instance of SpyHashStateImpl<A> when trying to combine `A`. This
-    // allows us to test that the user only uses this instance for combine calls
-    // and does not call AbslHashValue directly.
-    // See AbslHashValue implementation at the bottom.
-    s = SpyHashStateImpl<A>::HashStateBase::combine(std::move(s), a);
-    return SpyHashStateImpl::combine(std::move(s), args...);
-  }
-  static SpyHashStateImpl combine(SpyHashStateImpl s) {
-    if (direct_absl_hash_value_error_) {
-      *s.error_ = "AbslHashValue should not be invoked directly.";
-    } else if (s.moved_from_) {
-      *s.error_ = "Used moved-from instance of the hash state object.";
-    }
-    return s;
-  }
-
-  static void SetDirectAbslHashValueError() {
-    direct_absl_hash_value_error_ = true;
-  }
-
-  // Two SpyHashStateImpl objects are equal if they hold equal hash
-  // representations.
-  friend bool operator==(const SpyHashStateImpl& lhs,
-                         const SpyHashStateImpl& rhs) {
-    return lhs.hash_representation_ == rhs.hash_representation_;
-  }
-
-  friend bool operator!=(const SpyHashStateImpl& lhs,
-                         const SpyHashStateImpl& rhs) {
-    return !(lhs == rhs);
-  }
-
-  enum class CompareResult {
-    kEqual,
-    kASuffixB,
-    kBSuffixA,
-    kUnequal,
-  };
-
-  static CompareResult Compare(const SpyHashStateImpl& a,
-                               const SpyHashStateImpl& b) {
-    const std::string a_flat = absl::StrJoin(a.hash_representation_, "");
-    const std::string b_flat = absl::StrJoin(b.hash_representation_, "");
-    if (a_flat == b_flat) return CompareResult::kEqual;
-    if (absl::EndsWith(a_flat, b_flat)) return CompareResult::kBSuffixA;
-    if (absl::EndsWith(b_flat, a_flat)) return CompareResult::kASuffixB;
-    return CompareResult::kUnequal;
-  }
-
-  // operator<< prints the hash representation as a hex and ASCII dump, to
-  // facilitate debugging.
-  friend std::ostream& operator<<(std::ostream& out,
-                                  const SpyHashStateImpl& hash_state) {
-    out << "[\n";
-    for (auto& s : hash_state.hash_representation_) {
-      size_t offset = 0;
-      for (char c : s) {
-        if (offset % 16 == 0) {
-          out << absl::StreamFormat("\n0x%04x: ", offset);
-        }
-        if (offset % 2 == 0) {
-          out << " ";
-        }
-        out << absl::StreamFormat("%02x", c);
-        ++offset;
-      }
-      out << "\n";
-    }
-    return out << "]";
-  }
-
-  // The base case of the combine recursion, which writes raw bytes into the
-  // internal buffer.
-  static SpyHashStateImpl combine_contiguous(SpyHashStateImpl hash_state,
-                                             const unsigned char* begin,
-                                             size_t size) {
-    const size_t large_chunk_stride = PiecewiseChunkSize();
-    if (size > large_chunk_stride) {
-      // Combining a large contiguous buffer must have the same effect as
-      // doing it piecewise by the stride length, followed by the (possibly
-      // empty) remainder.
-      while (size >= large_chunk_stride) {
-        hash_state = SpyHashStateImpl::combine_contiguous(
-            std::move(hash_state), begin, large_chunk_stride);
-        begin += large_chunk_stride;
-        size -= large_chunk_stride;
-      }
-    }
-
-    hash_state.hash_representation_.emplace_back(
-        reinterpret_cast<const char*>(begin), size);
-    return hash_state;
-  }
-
-  using SpyHashStateImpl::HashStateBase::combine_contiguous;
-
-  absl::optional<std::string> error() const {
-    if (moved_from_) {
-      return "Returned a moved-from instance of the hash state object.";
-    }
-    return *error_;
-  }
-
- private:
-  template <typename U>
-  friend class SpyHashStateImpl;
-
-  // This is true if SpyHashStateImpl<T> has been passed to a call of
-  // AbslHashValue with the wrong type. This detects that the user called
-  // AbslHashValue directly (because the hash state type does not match).
-  static bool direct_absl_hash_value_error_;
-
-  std::vector<std::string> hash_representation_;
-  // This is a shared_ptr because we want all instances of the particular
-  // SpyHashState run to share the field. This way we can set the error for
-  // use-after-move and all the copies will see it.
-  std::shared_ptr<absl::optional<std::string>> error_;
-  bool moved_from_ = false;
-};
-
-template <typename T>
-bool SpyHashStateImpl<T>::direct_absl_hash_value_error_;
-
-template <bool& B>
-struct OdrUse {
-  constexpr OdrUse() {}
-  bool& b = B;
-};
-
-template <void (*)()>
-struct RunOnStartup {
-  static bool run;
-  static constexpr OdrUse<run> kOdrUse{};
-};
-
-template <void (*f)()>
-bool RunOnStartup<f>::run = (f(), true);
-
-template <
-    typename T, typename U,
-    // Only trigger for when (T != U),
-    typename = absl::enable_if_t<!std::is_same<T, U>::value>,
-    // This statement works in two ways:
-    //  - First, it instantiates RunOnStartup and forces the initialization of
-    //    `run`, which set the global variable.
-    //  - Second, it triggers a SFINAE error disabling the overload to prevent
-    //    compile time errors. If we didn't disable the overload we would get
-    //    ambiguous overload errors, which we don't want.
-    int = RunOnStartup<SpyHashStateImpl<T>::SetDirectAbslHashValueError>::run>
-void AbslHashValue(SpyHashStateImpl<T>, const U&);
-
-using SpyHashState = SpyHashStateImpl<void>;
-
-}  // namespace hash_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-#endif  // ABSL_HASH_INTERNAL_SPY_HASH_STATE_H_
author	Vincent Ambo <mail@tazj.in>	2022-02-07T23·05+0300
committer	clbot <clbot@tvl.fyi>	2022-02-07T23·09+0000
commit	5aa5d282eac56a21e74611c1cdbaa97bb5db2dca (patch)
tree	8cc5dce8157a1470ff76719dd15d65f648a05522 /third_party/abseil_cpp/absl/hash/internal
parent	a25675804c4f429fab5ee5201fe25e89865dfd13 (diff)