Creation of LTS branch "lts_2019_08_08"20190808

  - 9ee91d3e430fb33a4590486573792eb0fa146c2d Export of internal Abseil changes by Abseil Team <absl-team@google.com>
  - 8efba58a3b656e9b41fb0471ae6453425a61c520 Export of internal Abseil changes by Abseil Team <absl-team@google.com>
  - b49b8d16b67ec6912899684b732e6367f258cfdb Export of internal Abseil changes by Abseil Team <absl-team@google.com>
  - 67222ffc4c83d918ce8395aa61769eeb77df4c4d Export of internal Abseil changes by Abseil Team <absl-team@google.com>
  - c5c4db4f5191fe5e76cbf68dcc71fb28702f7d2b Export of internal Abseil changes by Abseil Team <absl-team@google.com>
  - 14550beb3b7b97195e483fb74b5efb906395c31e Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 52e88ee56b72cf32bc66534d942c7398ce481331 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 36d37ab992038f52276ca66b9da80c1cf0f57dc2 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - ad1485c8986246b2ae9105e512738d0e97aec887 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - f3840bc5e33ce4932e35986cf3718450c6f02af2 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 278b26058c036833a4f7f3047d3f4d9296527f87 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - c6c3c1b498e4ee939b24be59cae29d59c3863be8 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 44efe96dfca674a17b45ca53fc77fb69f1e29bf4 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 3c98fcc0461bd2a4b9c149d4748a7373a225cf4b Merge pull request #340 from jtsylve/macos_cxx17_fix by Matt Calabrese <38107210+mattcalabrese-google@users.noreply.github.com>
  - 74d91756c11bc22f9b0108b94da9326f7f9e376f Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - e6b050212c859fbaf67abac76105da10ec348274 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - c964fcffac27bd4a9ff67fe393410dd1146ef8b8 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 72e09a54d993b192db32be14c65adf7e9bd08c31 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - d65e19dfcd8697076f68598c0131c6930cdcd74d Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 5162fc83d2f3b79a9753ed59594c43966afdd37a Merge pull request #336 from shields/patch-2 by Shaindel Schwartz <31392632+shaindelschwartz@users.noreply.github.com>
  - 0389f7bf58fa41f35b3ad60be61d32f31e4f8ed6 Merge pull request #335 from shields/patch-1 by Shaindel Schwartz <31392632+shaindelschwartz@users.noreply.github.com>
  - e9324d926a9189e222741fce6e676f0944661a72 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 43ef2148c0936ebf7cb4be6b19927a9d9d145b8f Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - a13d3df2b3ba68aeead92e2d078fba0510d55024 Merge pull request #323 from gosnik/master by Gennadiy Rozental <rogeeff@google.com>
  - 310a11865c97c5cdcc42a4ee2c2e3578423afe69 Merge pull request #324 from RasPat1/patch-1 by Gennadiy Rozental <rogeeff@google.com>
  - 8f11724067248acc330b4d1f12f0c76d03f2cfb1 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - b1dd425423380126f6441ce4fbb6f8f6c75b793a Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 361cb8a9db2f2130442389fd80593255be26d681 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 0238ab0a831f179518c1a814f9584e99da2d75a3 Merge pull request #321 from christoph-cullmann/c4245_fix... by Xiaoyi Zhang <zhangxy988@gmail.com>
  - 61c9bf3e3e1c28a4aa6d7f1be4b37fd473bb5529 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - bc9101f9982391019521161a36179b52555ed212 Merge pull request #320 from christoph-cullmann/master by Xiaoyi Zhang <zhangxy988@gmail.com>
  - 2f76a9bf50046e396138cc8eeb3cdc17b7a5ac24 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 4adaf5490921f13028b55018c9f550277de5aebb Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 27c30ec671cb7b5ba84c4e79feff7fd0b0ac6338 Avoid undefined behavior when nullptr is passed to memcpy... by Roman Gershman <romange@gmail.com>
  - ce65f5ac3cbf897bb5e3de1a51d80fd00866abaa Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - a18fc7461e7409c2ad64e28537261db1e02e76fa Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 8a394b19c149cab50534b04c5e21d42bc2217a7d Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - daf381e8535a1f1f1b8a75966a74e7cca63dee89 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - fa00c321073c7ea40a4fc3dfc8a06309eae3d025 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 436ba6c4a0ea3a06eca6e055f9c8d296bf3bae12 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 0cbdc774b97f7e80ab60dbe2ed4eaca3b2e33fc8 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 27c2f6e2f3b5929fbd322b0f0ca392eb02efd9f8 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - aa468ad75539619b47979911297efbb629c52e44 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - cd86d0d20ab167c33b23d3875db68d1d4bad3a3b Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 33841c5c963aa9c3f096ef8e6c1e71624b941940 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - ca3f87560a0eef716195cadf66dc6b938a579ec6 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - d902eb869bcfacc1bad14933ed9af4bed006d481 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - a02f62f456f2c4a7ecf2be3104fe0c6e16fbad9a Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 0b545b460141b882b244a1efcef7621d59278160 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - dbae8764fbd429bf7d7745e24bcf73962177a7c0 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 044da8a29c923506af0f0b46bc46f43c1e1300b5 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 6cc6ac44e065b9e8975fadfd6ccb99cbcf89aac4 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 666fc1266bccfd8e6eaaa084e7b42580bb8eb199 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 93dfcf74cb5fccae3da07897d8613ae6cab958a0 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 2c8421e1c6cef0da9e8a20b01c15256ec9ec116d Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 5b65c4af5107176555b23a638e5947686410ac1f Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - eab2078b53c9e3d9d240135c09d27e3393acb50a Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 253eb7416421661873afbaa33828a850db978541 [CMake] Set correct flags for clang-cl (#278) by Loo Rong Jie <loorongjie@gmail.com>
  - e75672f6afc7e8f23ee7b532e86d1b3b9be3984e Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - bf29470384a101b307873b26d358433138c857fc Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 6fd827124facd8336981e73218997f9e73029b4f Merge pull request #280 from chiumichael/master by Derek Mauro <761129+derekmauro@users.noreply.github.com>
  - 7c7754fb3ed9ffb57d35fe8658f3ba4d73a31e72 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 256be563447a315f2a7993ec669460ba475fa86a Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 88a152ae747c3c42dc9167d46c590929b048d436 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - c1cecb25a94c075725e9d2640f6b978a8f61957b Implement Span::first and Span::last from C++20 (#274) by Girts <girtsf@users.noreply.github.com>
  - 38b704384cd2f17590b3922b97744be0b43622c9 Changed HTTP URLs to HTTPS where possible (#270) by nik7273 <nik8470@gmail.com>
  - febc5ee6a92d0eb7dac1fceaa6c648cf6521b4dc Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 9fdf5e5b805412cb2a2e624d3e9a11588120465f Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 419f3184f8ebcdb23105295eadd2a569f3351eb9 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - b312c3cb53a0aad75a85ac2bf57c4a614fbd48d4 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 308ce31528a7edfa39f5f6d36142278a0ae1bf45 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 93d155bc4414f6c121bb1f19dba9fdb27c8943bc Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 426eaa4aa44e4580418bee46c1bd13911151bfb1 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 2901ec32a919311384d6ad4194e2d927c06831f7 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - d78310fe5a82f2e0e6e16509ef8079c8d7e4674e Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - a4cb1c8ba61531a63f9d309eea01ac1d43d8371d Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 540e2537b92cd4abfae6ceddfe24304345461f32 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 89ea0c5ff34aaa5855cfc7aa41f323b8a0ef0ede Merge pull request #255 from uilianries/hotfix/conan by ahedberg <ahedberg@google.com>
  - 5e0dcf72c64fae912184d2e0de87195fe8f0a425 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 0dffca4e36791c7beeda04da10460b534283948a Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 6b4201f9ef650637510a21b8d6cbcc3bee4a606f Fix GCC8 warnings by Boris Staletic <boris.staletic@gmail.com>
  - 0b1e6d417b414aad9282e32e8c49c719edeb63c1 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - efccc502606bed768e50a6cd5806d8eb13e4e935 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 5e6a78131f7bd5940218462c07d88cdefdd75dbe Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 5eea0f713c14ac17788b83e496f11903f8e2bbb0 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 66f9becbb98ecc083f4db349b4b1e0ca9de93b15 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 018b4db1d73ec8238e6dc4b17fd9e1fd7468d0ed Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 9449ae94397f2fd683851348e25ed8c93f75b3b9 Merge pull request #243 from ThomsonTan/FixIntrinsic by Alex Strelnikov <strel@google.com>
  - b16aeb6756bdab08cdf12d40baab5b51f7d15b16 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 7ffbe09f3d85504bd018783bbe1e2c12992fe47c Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 01b471d9f3ebef27f5aaca14b66509099fa8cd6c Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 7bd8f36c741c7cbe311611d7981bf38ba04c6fef Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 968a34ffdaadd7db062a9621dfbdf8b2d16e05af Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 3e2e9b5557e76d098de4b8a2a659125b98ca519b Merge pull request #231 from uilianries/feature/conan by Mark Barolak <mbxx@users.noreply.github.com>
  - 111ca7060a6ff50115ca85b59f6b5d8c8c5e9105 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 389ec3f906f018661a5308458d623d01f96d7b23 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 8fbcdb90952c57828c4a9c2f6d79fcd7cae9088f Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 455dc17ba1af9635f0b60155bc565bc572a1e722 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - f197d7c72a54064cfde5a2058f1513a4a0ee36fb Export of internal Abseil changes. by Abseil Team <absl-team@google.com>
  - 284378a71b32dfb3af4e3661f585e671d1b603a3 Export of internal Abseil changes. by Abseil Team <absl-team@google.com>

GitOrigin-RevId: 9ee91d3e430fb33a4590486573792eb0fa146c2d
Change-Id: Ia06e548bc106cc9d136f6c65714be6645317aced

1 files changed, 899 insertions, 0 deletions

diff --git a/absl/flags/marshalling_test.cc b/absl/flags/marshalling_test.cc
new file mode 100644
index 00000000..37cd1940
--- /dev/null
+++ b/absl/flags/marshalling_test.cc
@@ -0,0 +1,899 @@
+//
+//  Copyright 2019 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/flags/marshalling.h"
+
+#include <cmath>
+
+#include "gtest/gtest.h"
+
+namespace {
+
+TEST(MarshallingTest, TestBoolParsing) {
+  std::string err;
+  bool value;
+
+  // True values.
+  EXPECT_TRUE(absl::ParseFlag("True", &value, &err));
+  EXPECT_TRUE(value);
+  EXPECT_TRUE(absl::ParseFlag("true", &value, &err));
+  EXPECT_TRUE(value);
+  EXPECT_TRUE(absl::ParseFlag("TRUE", &value, &err));
+  EXPECT_TRUE(value);
+
+  EXPECT_TRUE(absl::ParseFlag("Yes", &value, &err));
+  EXPECT_TRUE(value);
+  EXPECT_TRUE(absl::ParseFlag("yes", &value, &err));
+  EXPECT_TRUE(value);
+  EXPECT_TRUE(absl::ParseFlag("YES", &value, &err));
+  EXPECT_TRUE(value);
+
+  EXPECT_TRUE(absl::ParseFlag("t", &value, &err));
+  EXPECT_TRUE(value);
+  EXPECT_TRUE(absl::ParseFlag("T", &value, &err));
+  EXPECT_TRUE(value);
+
+  EXPECT_TRUE(absl::ParseFlag("y", &value, &err));
+  EXPECT_TRUE(value);
+  EXPECT_TRUE(absl::ParseFlag("Y", &value, &err));
+  EXPECT_TRUE(value);
+
+  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
+  EXPECT_TRUE(value);
+
+  // False values.
+  EXPECT_TRUE(absl::ParseFlag("False", &value, &err));
+  EXPECT_FALSE(value);
+  EXPECT_TRUE(absl::ParseFlag("false", &value, &err));
+  EXPECT_FALSE(value);
+  EXPECT_TRUE(absl::ParseFlag("FALSE", &value, &err));
+  EXPECT_FALSE(value);
+
+  EXPECT_TRUE(absl::ParseFlag("No", &value, &err));
+  EXPECT_FALSE(value);
+  EXPECT_TRUE(absl::ParseFlag("no", &value, &err));
+  EXPECT_FALSE(value);
+  EXPECT_TRUE(absl::ParseFlag("NO", &value, &err));
+  EXPECT_FALSE(value);
+
+  EXPECT_TRUE(absl::ParseFlag("f", &value, &err));
+  EXPECT_FALSE(value);
+  EXPECT_TRUE(absl::ParseFlag("F", &value, &err));
+  EXPECT_FALSE(value);
+
+  EXPECT_TRUE(absl::ParseFlag("n", &value, &err));
+  EXPECT_FALSE(value);
+  EXPECT_TRUE(absl::ParseFlag("N", &value, &err));
+  EXPECT_FALSE(value);
+
+  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
+  EXPECT_FALSE(value);
+
+  // Whitespace handling.
+  EXPECT_TRUE(absl::ParseFlag("  true", &value, &err));
+  EXPECT_TRUE(value);
+  EXPECT_TRUE(absl::ParseFlag("true  ", &value, &err));
+  EXPECT_TRUE(value);
+  EXPECT_TRUE(absl::ParseFlag("  true   ", &value, &err));
+  EXPECT_TRUE(value);
+
+  // Invalid input.
+  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("2", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("11", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("tt", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestInt16Parsing) {
+  std::string err;
+  int16_t value;
+
+  // Decimal values.
+  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
+  EXPECT_EQ(value, 0);
+  EXPECT_TRUE(absl::ParseFlag("-1", &value, &err));
+  EXPECT_EQ(value, -1);
+  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
+  EXPECT_EQ(value, 123);
+  EXPECT_TRUE(absl::ParseFlag("-18765", &value, &err));
+  EXPECT_EQ(value, -18765);
+  EXPECT_TRUE(absl::ParseFlag("+3", &value, &err));
+  EXPECT_EQ(value, 3);
+
+  // Leading zero values.
+  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("-001", &value, &err));
+  EXPECT_EQ(value, -1);
+  EXPECT_TRUE(absl::ParseFlag("0000100", &value, &err));
+  EXPECT_EQ(value, 100);
+
+  // Hex values.
+  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
+  EXPECT_EQ(value, 16);
+  EXPECT_TRUE(absl::ParseFlag("0X234", &value, &err));
+  EXPECT_EQ(value, 564);
+  // TODO(rogeeff): fix below validations
+  EXPECT_FALSE(absl::ParseFlag("-0x7FFD", &value, &err));
+  EXPECT_NE(value, -3);
+  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
+  EXPECT_NE(value, 49);
+
+  // Whitespace handling
+  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
+  EXPECT_EQ(value, 10);
+  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
+  EXPECT_EQ(value, 11);
+  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
+  EXPECT_EQ(value, 12);
+  EXPECT_TRUE(absl::ParseFlag(" 0x22    ", &value, &err));
+  EXPECT_EQ(value, 34);
+
+  // Invalid values.
+  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("40000", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestUint16Parsing) {
+  std::string err;
+  uint16_t value;
+
+  // Decimal values.
+  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
+  EXPECT_EQ(value, 0);
+  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
+  EXPECT_EQ(value, 123);
+  EXPECT_TRUE(absl::ParseFlag("+3", &value, &err));
+  EXPECT_EQ(value, 3);
+
+  // Leading zero values.
+  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("001", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("0000100", &value, &err));
+  EXPECT_EQ(value, 100);
+
+  // Hex values.
+  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
+  EXPECT_EQ(value, 16);
+  EXPECT_TRUE(absl::ParseFlag("0X234", &value, &err));
+  EXPECT_EQ(value, 564);
+  // TODO(rogeeff): fix below validations
+  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
+  EXPECT_NE(value, 49);
+
+  // Whitespace handling
+  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
+  EXPECT_EQ(value, 10);
+  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
+  EXPECT_EQ(value, 11);
+  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
+  EXPECT_EQ(value, 12);
+  EXPECT_TRUE(absl::ParseFlag(" 0x22    ", &value, &err));
+  EXPECT_EQ(value, 34);
+
+  // Invalid values.
+  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("70000", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("-1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestInt32Parsing) {
+  std::string err;
+  int32_t value;
+
+  // Decimal values.
+  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
+  EXPECT_EQ(value, 0);
+  EXPECT_TRUE(absl::ParseFlag("-1", &value, &err));
+  EXPECT_EQ(value, -1);
+  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
+  EXPECT_EQ(value, 123);
+  EXPECT_TRUE(absl::ParseFlag("-98765", &value, &err));
+  EXPECT_EQ(value, -98765);
+  EXPECT_TRUE(absl::ParseFlag("+3", &value, &err));
+  EXPECT_EQ(value, 3);
+
+  // Leading zero values.
+  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("-001", &value, &err));
+  EXPECT_EQ(value, -1);
+  EXPECT_TRUE(absl::ParseFlag("0000100", &value, &err));
+  EXPECT_EQ(value, 100);
+
+  // Hex values.
+  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
+  EXPECT_EQ(value, 16);
+  EXPECT_TRUE(absl::ParseFlag("0X234", &value, &err));
+  EXPECT_EQ(value, 564);
+  // TODO(rogeeff): fix below validations
+  EXPECT_FALSE(absl::ParseFlag("-0x7FFFFFFD", &value, &err));
+  EXPECT_NE(value, -3);
+  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
+  EXPECT_NE(value, 49);
+
+  // Whitespace handling
+  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
+  EXPECT_EQ(value, 10);
+  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
+  EXPECT_EQ(value, 11);
+  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
+  EXPECT_EQ(value, 12);
+  EXPECT_TRUE(absl::ParseFlag(" 0x22    ", &value, &err));
+  EXPECT_EQ(value, 34);
+
+  // Invalid values.
+  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("70000000000", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestUint32Parsing) {
+  std::string err;
+  uint32_t value;
+
+  // Decimal values.
+  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
+  EXPECT_EQ(value, 0);
+  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
+  EXPECT_EQ(value, 123);
+  EXPECT_TRUE(absl::ParseFlag("+3", &value, &err));
+  EXPECT_EQ(value, 3);
+
+  // Leading zero values.
+  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("0000100", &value, &err));
+  EXPECT_EQ(value, 100);
+
+  // Hex values.
+  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
+  EXPECT_EQ(value, 16);
+  EXPECT_TRUE(absl::ParseFlag("0X234", &value, &err));
+  EXPECT_EQ(value, 564);
+  EXPECT_TRUE(absl::ParseFlag("0xFFFFFFFD", &value, &err));
+  EXPECT_EQ(value, 4294967293);
+  // TODO(rogeeff): fix below validations
+  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
+  EXPECT_NE(value, 49);
+
+  // Whitespace handling
+  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
+  EXPECT_EQ(value, 10);
+  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
+  EXPECT_EQ(value, 11);
+  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
+  EXPECT_EQ(value, 12);
+  EXPECT_TRUE(absl::ParseFlag(" 0x22    ", &value, &err));
+  EXPECT_EQ(value, 34);
+
+  // Invalid values.
+  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("140000000000", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("-1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestInt64Parsing) {
+  std::string err;
+  int64_t value;
+
+  // Decimal values.
+  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
+  EXPECT_EQ(value, 0);
+  EXPECT_TRUE(absl::ParseFlag("-1", &value, &err));
+  EXPECT_EQ(value, -1);
+  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
+  EXPECT_EQ(value, 123);
+  EXPECT_TRUE(absl::ParseFlag("-98765", &value, &err));
+  EXPECT_EQ(value, -98765);
+  EXPECT_TRUE(absl::ParseFlag("+3", &value, &err));
+  EXPECT_EQ(value, 3);
+
+  // Leading zero values.
+  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("001", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("0000100", &value, &err));
+  EXPECT_EQ(value, 100);
+
+  // Hex values.
+  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
+  EXPECT_EQ(value, 16);
+  EXPECT_TRUE(absl::ParseFlag("0XFFFAAABBBCCCDDD", &value, &err));
+  EXPECT_EQ(value, 1152827684197027293);
+  // TODO(rogeeff): fix below validation
+  EXPECT_FALSE(absl::ParseFlag("-0x7FFFFFFFFFFFFFFE", &value, &err));
+  EXPECT_NE(value, -2);
+  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
+  EXPECT_NE(value, 49);
+
+  // Whitespace handling
+  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
+  EXPECT_EQ(value, 10);
+  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
+  EXPECT_EQ(value, 11);
+  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
+  EXPECT_EQ(value, 12);
+  EXPECT_TRUE(absl::ParseFlag(" 0x7F    ", &value, &err));
+  EXPECT_EQ(value, 127);
+
+  // Invalid values.
+  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("0xFFFFFFFFFFFFFFFFFF", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestUInt64Parsing) {
+  std::string err;
+  uint64_t value;
+
+  // Decimal values.
+  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("0", &value, &err));
+  EXPECT_EQ(value, 0);
+  EXPECT_TRUE(absl::ParseFlag("123", &value, &err));
+  EXPECT_EQ(value, 123);
+  EXPECT_TRUE(absl::ParseFlag("+13", &value, &err));
+  EXPECT_EQ(value, 13);
+
+  // Leading zero values.
+  EXPECT_TRUE(absl::ParseFlag("01", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("001", &value, &err));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(absl::ParseFlag("0000300", &value, &err));
+  EXPECT_EQ(value, 300);
+
+  // Hex values.
+  EXPECT_TRUE(absl::ParseFlag("0x10", &value, &err));
+  EXPECT_EQ(value, 16);
+  EXPECT_TRUE(absl::ParseFlag("0XFFFF", &value, &err));
+  EXPECT_EQ(value, 65535);
+  // TODO(rogeeff): fix below validation
+  EXPECT_FALSE(absl::ParseFlag("+0x31", &value, &err));
+  EXPECT_NE(value, 49);
+
+  // Whitespace handling
+  EXPECT_TRUE(absl::ParseFlag("10  ", &value, &err));
+  EXPECT_EQ(value, 10);
+  EXPECT_TRUE(absl::ParseFlag("  11", &value, &err));
+  EXPECT_EQ(value, 11);
+  EXPECT_TRUE(absl::ParseFlag("  012  ", &value, &err));
+  EXPECT_EQ(value, 12);
+
+  // Invalid values.
+  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("0xFFFFFFFFFFFFFFFFFF", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("-1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("2U", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("FFF", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestFloatParsing) {
+  std::string err;
+  float value;
+
+  // Ordinary values.
+  EXPECT_TRUE(absl::ParseFlag("1.3", &value, &err));
+  EXPECT_FLOAT_EQ(value, 1.3f);
+  EXPECT_TRUE(absl::ParseFlag("-0.1", &value, &err));
+  EXPECT_DOUBLE_EQ(value, -0.1f);
+  EXPECT_TRUE(absl::ParseFlag("+0.01", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 0.01f);
+
+  // Scientific values.
+  EXPECT_TRUE(absl::ParseFlag("1.2e3", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 1.2e3f);
+  EXPECT_TRUE(absl::ParseFlag("9.8765402e-37", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 9.8765402e-37f);
+  EXPECT_TRUE(absl::ParseFlag("0.11e+3", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 0.11e+3f);
+  EXPECT_TRUE(absl::ParseFlag("1.e-2300", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 0.f);
+  EXPECT_TRUE(absl::ParseFlag("1.e+2300", &value, &err));
+  EXPECT_TRUE(std::isinf(value));
+
+  // Leading zero values.
+  EXPECT_TRUE(absl::ParseFlag("01.6", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 1.6f);
+  EXPECT_TRUE(absl::ParseFlag("000.0001", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 0.0001f);
+
+  // Trailing zero values.
+  EXPECT_TRUE(absl::ParseFlag("-5.1000", &value, &err));
+  EXPECT_DOUBLE_EQ(value, -5.1f);
+
+  // Exceptional values.
+  EXPECT_TRUE(absl::ParseFlag("NaN", &value, &err));
+  EXPECT_TRUE(std::isnan(value));
+  EXPECT_TRUE(absl::ParseFlag("Inf", &value, &err));
+  EXPECT_TRUE(std::isinf(value));
+
+  // Hex values
+  EXPECT_TRUE(absl::ParseFlag("0x10.23p12", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 66096.f);
+  EXPECT_TRUE(absl::ParseFlag("-0xF1.A3p-2", &value, &err));
+  EXPECT_NEAR(value, -60.4092f, 5e-5f);
+  EXPECT_TRUE(absl::ParseFlag("+0x0.0AAp-12", &value, &err));
+  EXPECT_NEAR(value, 1.01328e-05f, 5e-11f);
+  EXPECT_TRUE(absl::ParseFlag("0x.01p1", &value, &err));
+  EXPECT_NEAR(value, 0.0078125f, 5e-8f);
+
+  // Whitespace handling
+  EXPECT_TRUE(absl::ParseFlag("10.1  ", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 10.1f);
+  EXPECT_TRUE(absl::ParseFlag("  2.34", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 2.34f);
+  EXPECT_TRUE(absl::ParseFlag("  5.7  ", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 5.7f);
+  EXPECT_TRUE(absl::ParseFlag("  -0xE0.F3p01  ", &value, &err));
+  EXPECT_NEAR(value, -449.8984375f, 5e-8f);
+
+  // Invalid values.
+  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("2.3xxx", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("0x0.1pAA", &value, &err));
+  // TODO(rogeeff): below assertion should fail
+  EXPECT_TRUE(absl::ParseFlag("0x0.1", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestDoubleParsing) {
+  std::string err;
+  double value;
+
+  // Ordinary values.
+  EXPECT_TRUE(absl::ParseFlag("1.3", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 1.3);
+  EXPECT_TRUE(absl::ParseFlag("-0.1", &value, &err));
+  EXPECT_DOUBLE_EQ(value, -0.1);
+  EXPECT_TRUE(absl::ParseFlag("+0.01", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 0.01);
+
+  // Scientific values.
+  EXPECT_TRUE(absl::ParseFlag("1.2e3", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 1.2e3);
+  EXPECT_TRUE(absl::ParseFlag("9.00000002e-123", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 9.00000002e-123);
+  EXPECT_TRUE(absl::ParseFlag("0.11e+3", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 0.11e+3);
+  EXPECT_TRUE(absl::ParseFlag("1.e-2300", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 0);
+  EXPECT_TRUE(absl::ParseFlag("1.e+2300", &value, &err));
+  EXPECT_TRUE(std::isinf(value));
+
+  // Leading zero values.
+  EXPECT_TRUE(absl::ParseFlag("01.6", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 1.6);
+  EXPECT_TRUE(absl::ParseFlag("000.0001", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 0.0001);
+
+  // Trailing zero values.
+  EXPECT_TRUE(absl::ParseFlag("-5.1000", &value, &err));
+  EXPECT_DOUBLE_EQ(value, -5.1);
+
+  // Exceptional values.
+  EXPECT_TRUE(absl::ParseFlag("NaN", &value, &err));
+  EXPECT_TRUE(std::isnan(value));
+  EXPECT_TRUE(absl::ParseFlag("nan", &value, &err));
+  EXPECT_TRUE(std::isnan(value));
+  EXPECT_TRUE(absl::ParseFlag("Inf", &value, &err));
+  EXPECT_TRUE(std::isinf(value));
+  EXPECT_TRUE(absl::ParseFlag("inf", &value, &err));
+  EXPECT_TRUE(std::isinf(value));
+
+  // Hex values
+  EXPECT_TRUE(absl::ParseFlag("0x10.23p12", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 66096);
+  EXPECT_TRUE(absl::ParseFlag("-0xF1.A3p-2", &value, &err));
+  EXPECT_NEAR(value, -60.4092, 5e-5);
+  EXPECT_TRUE(absl::ParseFlag("+0x0.0AAp-12", &value, &err));
+  EXPECT_NEAR(value, 1.01328e-05, 5e-11);
+  EXPECT_TRUE(absl::ParseFlag("0x.01p1", &value, &err));
+  EXPECT_NEAR(value, 0.0078125, 5e-8);
+
+  // Whitespace handling
+  EXPECT_TRUE(absl::ParseFlag("10.1  ", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 10.1);
+  EXPECT_TRUE(absl::ParseFlag("  2.34", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 2.34);
+  EXPECT_TRUE(absl::ParseFlag("  5.7  ", &value, &err));
+  EXPECT_DOUBLE_EQ(value, 5.7);
+  EXPECT_TRUE(absl::ParseFlag("  -0xE0.F3p01  ", &value, &err));
+  EXPECT_NEAR(value, -449.8984375, 5e-8);
+
+  // Invalid values.
+  EXPECT_FALSE(absl::ParseFlag("", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag(" ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("  ", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("--1", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\n", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("\t", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("2.3xxx", &value, &err));
+  EXPECT_FALSE(absl::ParseFlag("0x0.1pAA", &value, &err));
+  // TODO(rogeeff): below assertion should fail
+  EXPECT_TRUE(absl::ParseFlag("0x0.1", &value, &err));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestStringParsing) {
+  std::string err;
+  std::string value;
+
+  EXPECT_TRUE(absl::ParseFlag("", &value, &err));
+  EXPECT_EQ(value, "");
+  EXPECT_TRUE(absl::ParseFlag(" ", &value, &err));
+  EXPECT_EQ(value, " ");
+  EXPECT_TRUE(absl::ParseFlag("   ", &value, &err));
+  EXPECT_EQ(value, "   ");
+  EXPECT_TRUE(absl::ParseFlag("\n", &value, &err));
+  EXPECT_EQ(value, "\n");
+  EXPECT_TRUE(absl::ParseFlag("\t", &value, &err));
+  EXPECT_EQ(value, "\t");
+  EXPECT_TRUE(absl::ParseFlag("asdfg", &value, &err));
+  EXPECT_EQ(value, "asdfg");
+  EXPECT_TRUE(absl::ParseFlag("asdf ghjk", &value, &err));
+  EXPECT_EQ(value, "asdf ghjk");
+  EXPECT_TRUE(absl::ParseFlag("a\nb\nc", &value, &err));
+  EXPECT_EQ(value, "a\nb\nc");
+  EXPECT_TRUE(absl::ParseFlag("asd\0fgh", &value, &err));
+  EXPECT_EQ(value, "asd");
+  EXPECT_TRUE(absl::ParseFlag("\\\\", &value, &err));
+  EXPECT_EQ(value, "\\\\");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestVectorOfStringParsing) {
+  std::string err;
+  std::vector<std::string> value;
+
+  EXPECT_TRUE(absl::ParseFlag("", &value, &err));
+  EXPECT_EQ(value, std::vector<std::string>{});
+  EXPECT_TRUE(absl::ParseFlag("1", &value, &err));
+  EXPECT_EQ(value, std::vector<std::string>({"1"}));
+  EXPECT_TRUE(absl::ParseFlag("a,b", &value, &err));
+  EXPECT_EQ(value, std::vector<std::string>({"a", "b"}));
+  EXPECT_TRUE(absl::ParseFlag("a,b,c,", &value, &err));
+  EXPECT_EQ(value, std::vector<std::string>({"a", "b", "c", ""}));
+  EXPECT_TRUE(absl::ParseFlag("a,,", &value, &err));
+  EXPECT_EQ(value, std::vector<std::string>({"a", "", ""}));
+  EXPECT_TRUE(absl::ParseFlag(",", &value, &err));
+  EXPECT_EQ(value, std::vector<std::string>({"", ""}));
+  EXPECT_TRUE(absl::ParseFlag("a, b,c ", &value, &err));
+  EXPECT_EQ(value, std::vector<std::string>({"a", " b", "c "}));
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestBoolUnparsing) {
+  EXPECT_EQ(absl::UnparseFlag(true), "true");
+  EXPECT_EQ(absl::UnparseFlag(false), "false");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestInt16Unparsing) {
+  int16_t value;
+
+  value = 1;
+  EXPECT_EQ(absl::UnparseFlag(value), "1");
+  value = 0;
+  EXPECT_EQ(absl::UnparseFlag(value), "0");
+  value = -1;
+  EXPECT_EQ(absl::UnparseFlag(value), "-1");
+  value = 9876;
+  EXPECT_EQ(absl::UnparseFlag(value), "9876");
+  value = -987;
+  EXPECT_EQ(absl::UnparseFlag(value), "-987");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestUint16Unparsing) {
+  uint16_t value;
+
+  value = 1;
+  EXPECT_EQ(absl::UnparseFlag(value), "1");
+  value = 0;
+  EXPECT_EQ(absl::UnparseFlag(value), "0");
+  value = 19876;
+  EXPECT_EQ(absl::UnparseFlag(value), "19876");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestInt32Unparsing) {
+  int32_t value;
+
+  value = 1;
+  EXPECT_EQ(absl::UnparseFlag(value), "1");
+  value = 0;
+  EXPECT_EQ(absl::UnparseFlag(value), "0");
+  value = -1;
+  EXPECT_EQ(absl::UnparseFlag(value), "-1");
+  value = 12345;
+  EXPECT_EQ(absl::UnparseFlag(value), "12345");
+  value = -987;
+  EXPECT_EQ(absl::UnparseFlag(value), "-987");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestUint32Unparsing) {
+  uint32_t value;
+
+  value = 1;
+  EXPECT_EQ(absl::UnparseFlag(value), "1");
+  value = 0;
+  EXPECT_EQ(absl::UnparseFlag(value), "0");
+  value = 1234500;
+  EXPECT_EQ(absl::UnparseFlag(value), "1234500");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestInt64Unparsing) {
+  int64_t value;
+
+  value = 1;
+  EXPECT_EQ(absl::UnparseFlag(value), "1");
+  value = 0;
+  EXPECT_EQ(absl::UnparseFlag(value), "0");
+  value = -1;
+  EXPECT_EQ(absl::UnparseFlag(value), "-1");
+  value = 123456789L;
+  EXPECT_EQ(absl::UnparseFlag(value), "123456789");
+  value = -987654321L;
+  EXPECT_EQ(absl::UnparseFlag(value), "-987654321");
+  value = 0x7FFFFFFFFFFFFFFF;
+  EXPECT_EQ(absl::UnparseFlag(value), "9223372036854775807");
+  value = 0xFFFFFFFFFFFFFFFF;
+  EXPECT_EQ(absl::UnparseFlag(value), "-1");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestUint64Unparsing) {
+  uint64_t value;
+
+  value = 1;
+  EXPECT_EQ(absl::UnparseFlag(value), "1");
+  value = 0;
+  EXPECT_EQ(absl::UnparseFlag(value), "0");
+  value = 123456789L;
+  EXPECT_EQ(absl::UnparseFlag(value), "123456789");
+  value = 0xFFFFFFFFFFFFFFFF;
+  EXPECT_EQ(absl::UnparseFlag(value), "18446744073709551615");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestFloatUnparsing) {
+  float value;
+
+  value = 1.1f;
+  EXPECT_EQ(absl::UnparseFlag(value), "1.1");
+  value = 0.01f;
+  EXPECT_EQ(absl::UnparseFlag(value), "0.01");
+  value = 1.23e-2f;
+  EXPECT_EQ(absl::UnparseFlag(value), "0.0123");
+  value = -0.71f;
+  EXPECT_EQ(absl::UnparseFlag(value), "-0.71");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestDoubleUnparsing) {
+  double value;
+
+  value = 1.1;
+  EXPECT_EQ(absl::UnparseFlag(value), "1.1");
+  value = 0.01;
+  EXPECT_EQ(absl::UnparseFlag(value), "0.01");
+  value = 1.23e-2;
+  EXPECT_EQ(absl::UnparseFlag(value), "0.0123");
+  value = -0.71;
+  EXPECT_EQ(absl::UnparseFlag(value), "-0.71");
+  value = -0;
+  EXPECT_EQ(absl::UnparseFlag(value), "0");
+  value = std::nan("");
+  EXPECT_EQ(absl::UnparseFlag(value), "nan");
+  value = std::numeric_limits<double>::infinity();
+  EXPECT_EQ(absl::UnparseFlag(value), "inf");
+}
+
+// --------------------------------------------------------------------
+
+TEST(MarshallingTest, TestStringUnparsing) {
+  EXPECT_EQ(absl::UnparseFlag(""), "");
+  EXPECT_EQ(absl::UnparseFlag(" "), " ");
+  EXPECT_EQ(absl::UnparseFlag("qwerty"), "qwerty");
+  EXPECT_EQ(absl::UnparseFlag("ASDFGH"), "ASDFGH");
+  EXPECT_EQ(absl::UnparseFlag("\n\t  "), "\n\t  ");
+}
+
+// --------------------------------------------------------------------
+
+template <typename T>
+void TestRoundtrip(T v) {
+  T new_v;
+  std::string err;
+  EXPECT_TRUE(absl::ParseFlag(absl::UnparseFlag(v), &new_v, &err));
+  EXPECT_EQ(new_v, v);
+}
+
+TEST(MarshallingTest, TestFloatRoundTrip) {
+  TestRoundtrip(0.1f);
+  TestRoundtrip(0.12f);
+  TestRoundtrip(0.123f);
+  TestRoundtrip(0.1234f);
+  TestRoundtrip(0.12345f);
+  TestRoundtrip(0.123456f);
+  TestRoundtrip(0.1234567f);
+  TestRoundtrip(0.12345678f);
+
+  TestRoundtrip(0.1e20f);
+  TestRoundtrip(0.12e20f);
+  TestRoundtrip(0.123e20f);
+  TestRoundtrip(0.1234e20f);
+  TestRoundtrip(0.12345e20f);
+  TestRoundtrip(0.123456e20f);
+  TestRoundtrip(0.1234567e20f);
+  TestRoundtrip(0.12345678e20f);
+
+  TestRoundtrip(0.1e-20f);
+  TestRoundtrip(0.12e-20f);
+  TestRoundtrip(0.123e-20f);
+  TestRoundtrip(0.1234e-20f);
+  TestRoundtrip(0.12345e-20f);
+  TestRoundtrip(0.123456e-20f);
+  TestRoundtrip(0.1234567e-20f);
+  TestRoundtrip(0.12345678e-20f);
+}
+
+TEST(MarshallingTest, TestDoubleRoundTrip) {
+  TestRoundtrip(0.1);
+  TestRoundtrip(0.12);
+  TestRoundtrip(0.123);
+  TestRoundtrip(0.1234);
+  TestRoundtrip(0.12345);
+  TestRoundtrip(0.123456);
+  TestRoundtrip(0.1234567);
+  TestRoundtrip(0.12345678);
+  TestRoundtrip(0.123456789);
+  TestRoundtrip(0.1234567891);
+  TestRoundtrip(0.12345678912);
+  TestRoundtrip(0.123456789123);
+  TestRoundtrip(0.1234567891234);
+  TestRoundtrip(0.12345678912345);
+  TestRoundtrip(0.123456789123456);
+  TestRoundtrip(0.1234567891234567);
+  TestRoundtrip(0.12345678912345678);
+
+  TestRoundtrip(0.1e50);
+  TestRoundtrip(0.12e50);
+  TestRoundtrip(0.123e50);
+  TestRoundtrip(0.1234e50);
+  TestRoundtrip(0.12345e50);
+  TestRoundtrip(0.123456e50);
+  TestRoundtrip(0.1234567e50);
+  TestRoundtrip(0.12345678e50);
+  TestRoundtrip(0.123456789e50);
+  TestRoundtrip(0.1234567891e50);
+  TestRoundtrip(0.12345678912e50);
+  TestRoundtrip(0.123456789123e50);
+  TestRoundtrip(0.1234567891234e50);
+  TestRoundtrip(0.12345678912345e50);
+  TestRoundtrip(0.123456789123456e50);
+  TestRoundtrip(0.1234567891234567e50);
+  TestRoundtrip(0.12345678912345678e50);
+
+  TestRoundtrip(0.1e-50);
+  TestRoundtrip(0.12e-50);
+  TestRoundtrip(0.123e-50);
+  TestRoundtrip(0.1234e-50);
+  TestRoundtrip(0.12345e-50);
+  TestRoundtrip(0.123456e-50);
+  TestRoundtrip(0.1234567e-50);
+  TestRoundtrip(0.12345678e-50);
+  TestRoundtrip(0.123456789e-50);
+  TestRoundtrip(0.1234567891e-50);
+  TestRoundtrip(0.12345678912e-50);
+  TestRoundtrip(0.123456789123e-50);
+  TestRoundtrip(0.1234567891234e-50);
+  TestRoundtrip(0.12345678912345e-50);
+  TestRoundtrip(0.123456789123456e-50);
+  TestRoundtrip(0.1234567891234567e-50);
+  TestRoundtrip(0.12345678912345678e-50);
+}
+
+}  // namespace