Export of internal Abseil changes

--
a9eb3c976c6d8ef4fca3d416847f8fca4bd90dd7 by Derek Mauro <dmauro@google.com>:

Remove the deprecated container library, which doesn't do anything.
This will help prevent user confusion, as seen in #183.

PiperOrigin-RevId: 360172262

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4f872f651e25a528bdc59ee4e24543fbbd358f00 by Abseil Team <absl-team@google.com>:

Remove unused nspace alias.

PiperOrigin-RevId: 359487559

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43e877e464886cf9226012f5bb47910b8995e70f by Abseil Team <absl-team@google.com>:

Create a StatusToStringMode to control how the ToString behaves.

PiperOrigin-RevId: 359339603

--
0da1291569e167341613359846948c72c8a838e1 by Greg Falcon <gfalcon@google.com>:

Fix a bug in SimpleAtoi/SimpleAtof, which accepted a prefix of "+-" (e.g., "+-5" was parsed as 5.0).

This regression was introduced when we migrated these functions to use absl::from_chars.

PiperOrigin-RevId: 359135105
GitOrigin-RevId: a9eb3c976c6d8ef4fca3d416847f8fca4bd90dd7
Change-Id: I0e2072cad80651e473ba1d34b1fb3a033dfaba80

7 files changed, 126 insertions, 32 deletions

diff --git a/absl/container/CMakeLists.txt b/absl/container/CMakeLists.txt
index eb202c45..2d7d0e65 100644
--- a/absl/container/CMakeLists.txt
+++ b/absl/container/CMakeLists.txt
@@ -14,15 +14,6 @@
 # limitations under the License.
 #
 
-# This is deprecated and will be removed in the future.  It also doesn't do
-# anything anyways.  Prefer to use the library associated with the API you are
-# using.
-absl_cc_library(
-  NAME
-    container
-  PUBLIC
-)
-
 absl_cc_library(
   NAME
     btree
diff --git a/absl/flags/reflection_test.cc b/absl/flags/reflection_test.cc
index 4c809009..79cfa90c 100644
--- a/absl/flags/reflection_test.cc
+++ b/absl/flags/reflection_test.cc
@@ -34,8 +34,6 @@ ABSL_RETIRED_FLAG(bool, bool_retired_flag, false, "bool_retired_flag help");
 
 namespace {
 
-namespace flags = absl::flags_internal;
-
 class ReflectionTest : public testing::Test {
  protected:
   void SetUp() override { flag_saver_ = absl::make_unique<absl::FlagSaver>(); }
diff --git a/absl/status/status.cc b/absl/status/status.cc
index 7962bb9e..51a0d268 100644
--- a/absl/status/status.cc
+++ b/absl/status/status.cc
@@ -291,20 +291,26 @@ bool Status::EqualsSlow(const absl::Status& a, const absl::Status& b) {
   return true;
 }
 
-std::string Status::ToStringSlow() const {
+std::string Status::ToStringSlow(StatusToStringMode mode) const {
   std::string text;
   absl::StrAppend(&text, absl::StatusCodeToString(code()), ": ", message());
-  status_internal::StatusPayloadPrinter printer =
-      status_internal::GetStatusPayloadPrinter();
-  this->ForEachPayload([&](absl::string_view type_url,
-                           const absl::Cord& payload) {
-    absl::optional<std::string> result;
-    if (printer) result = printer(type_url, payload);
-    absl::StrAppend(
-        &text, " [", type_url, "='",
-        result.has_value() ? *result : absl::CHexEscape(std::string(payload)),
-        "']");
-  });
+
+  const bool with_payload = (mode & StatusToStringMode::kWithPayload) ==
+                      StatusToStringMode::kWithPayload;
+
+  if (with_payload) {
+    status_internal::StatusPayloadPrinter printer =
+        status_internal::GetStatusPayloadPrinter();
+    this->ForEachPayload([&](absl::string_view type_url,
+                             const absl::Cord& payload) {
+      absl::optional<std::string> result;
+      if (printer) result = printer(type_url, payload);
+      absl::StrAppend(
+          &text, " [", type_url, "='",
+          result.has_value() ? *result : absl::CHexEscape(std::string(payload)),
+          "']");
+    });
+  }
 
   return text;
 }
diff --git a/absl/status/status.h b/absl/status/status.h
index 118f64fb..df9e330c 100644
--- a/absl/status/status.h
+++ b/absl/status/status.h
@@ -280,6 +280,55 @@ std::string StatusCodeToString(StatusCode code);
 // Streams StatusCodeToString(code) to `os`.
 std::ostream& operator<<(std::ostream& os, StatusCode code);
 
+// absl::StatusToStringMode
+//
+// An `absl::StatusToStringMode` is an enumerated type indicating how
+// `absl::Status::ToString()` should construct the output string for an non-ok
+// status.
+enum class StatusToStringMode : int {
+  // ToString will not contain any extra data (such as payloads). It will only
+  // contain the error code and message, if any.
+  kWithNoExtraData = 0,
+  // ToString will contain the payloads.
+  kWithPayload = 1 << 0,
+};
+
+// absl::StatusToStringMode is specified as a bitmask type, which means the
+// following operations must be provided:
+inline constexpr StatusToStringMode operator&(StatusToStringMode lhs,
+                                              StatusToStringMode rhs) {
+  return static_cast<StatusToStringMode>(static_cast<int>(lhs) &
+                                         static_cast<int>(rhs));
+}
+inline constexpr StatusToStringMode operator|(StatusToStringMode lhs,
+                                              StatusToStringMode rhs) {
+  return static_cast<StatusToStringMode>(static_cast<int>(lhs) |
+                                         static_cast<int>(rhs));
+}
+inline constexpr StatusToStringMode operator^(StatusToStringMode lhs,
+                                              StatusToStringMode rhs) {
+  return static_cast<StatusToStringMode>(static_cast<int>(lhs) ^
+                                         static_cast<int>(rhs));
+}
+inline constexpr StatusToStringMode operator~(StatusToStringMode arg) {
+  return static_cast<StatusToStringMode>(~static_cast<int>(arg));
+}
+inline StatusToStringMode& operator&=(StatusToStringMode& lhs,
+                                      StatusToStringMode rhs) {
+  lhs = lhs & rhs;
+  return lhs;
+}
+inline StatusToStringMode& operator|=(StatusToStringMode& lhs,
+                                      StatusToStringMode rhs) {
+  lhs = lhs | rhs;
+  return lhs;
+}
+inline StatusToStringMode& operator^=(StatusToStringMode& lhs,
+                                      StatusToStringMode rhs) {
+  lhs = lhs ^ rhs;
+  return lhs;
+}
+
 // absl::Status
 //
 // The `absl::Status` class is generally used to gracefully handle errors
@@ -443,15 +492,17 @@ class ABSL_MUST_USE_RESULT Status final {
 
   // Status::ToString()
   //
-  // Returns a combination of the error code name, the message and any
-  // associated payload messages. This string is designed simply to be human
-  // readable and its exact format should not be load bearing. Do not depend on
-  // the exact format of the result of `ToString()` which is subject to change.
+  // Returns a string based on the `mode`. By default, it returns combination of
+  // the error code name, the message and any associated payload messages. This
+  // string is designed simply to be human readable and its exact format should
+  // not be load bearing. Do not depend on the exact format of the result of
+  // `ToString()` which is subject to change.
   //
   // The printed code name and the message are generally substrings of the
   // result, and the payloads to be printed use the status payload printer
   // mechanism (which is internal).
-  std::string ToString() const;
+  std::string ToString(
+      StatusToStringMode mode = StatusToStringMode::kWithPayload) const;
 
   // Status::IgnoreError()
   //
@@ -582,8 +633,7 @@ class ABSL_MUST_USE_RESULT Status final {
   static uintptr_t PointerToRep(status_internal::StatusRep* r);
   static status_internal::StatusRep* RepToPointer(uintptr_t r);
 
-  // Returns string for non-ok Status.
-  std::string ToStringSlow() const;
+  std::string ToStringSlow(StatusToStringMode mode) const;
 
   // Status supports two different representations.
   //  - When the low bit is off it is an inlined representation.
@@ -747,8 +797,8 @@ inline bool operator!=(const Status& lhs, const Status& rhs) {
   return !(lhs == rhs);
 }
 
-inline std::string Status::ToString() const {
-  return ok() ? "OK" : ToStringSlow();
+inline std::string Status::ToString(StatusToStringMode mode) const {
+  return ok() ? "OK" : ToStringSlow(mode);
 }
 
 inline void Status::IgnoreError() const {
diff --git a/absl/status/status_test.cc b/absl/status/status_test.cc
index 24eaed61..7116ba67 100644
--- a/absl/status/status_test.cc
+++ b/absl/status/status_test.cc
@@ -280,6 +280,23 @@ TEST(Status, ToString) {
                     HasSubstr("[bar='\\xff']")));
 }
 
+TEST(Status, ToStringMode) {
+  absl::Status s(absl::StatusCode::kInternal, "fail");
+  s.SetPayload("foo", absl::Cord("bar"));
+  s.SetPayload("bar", absl::Cord("\377"));
+
+  EXPECT_EQ("INTERNAL: fail",
+            s.ToString(absl::StatusToStringMode::kWithNoExtraData));
+
+  EXPECT_THAT(s.ToString(absl::StatusToStringMode::kWithPayload),
+              AllOf(HasSubstr("INTERNAL: fail"), HasSubstr("[foo='bar']"),
+                    HasSubstr("[bar='\\xff']")));
+
+  EXPECT_THAT(s.ToString(~absl::StatusToStringMode::kWithPayload),
+              AllOf(HasSubstr("INTERNAL: fail"), Not(HasSubstr("[foo='bar']")),
+                    Not(HasSubstr("[bar='\\xff']"))));
+}
+
 absl::Status EraseAndReturn(const absl::Status& base) {
   absl::Status copy = base;
   EXPECT_TRUE(copy.ErasePayload(kUrl1));
diff --git a/absl/strings/numbers.cc b/absl/strings/numbers.cc
index e6bf44ce..966d94bd 100644
--- a/absl/strings/numbers.cc
+++ b/absl/strings/numbers.cc
@@ -46,8 +46,13 @@ ABSL_NAMESPACE_BEGIN
 bool SimpleAtof(absl::string_view str, float* out) {
   *out = 0.0;
   str = StripAsciiWhitespace(str);
+  // std::from_chars doesn't accept an initial +, but SimpleAtof does, so if one
+  // is present, skip it, while avoiding accepting "+-0" as valid.
   if (!str.empty() && str[0] == '+') {
     str.remove_prefix(1);
+    if (!str.empty() && str[0] == '-') {
+      return false;
+    }
   }
   auto result = absl::from_chars(str.data(), str.data() + str.size(), *out);
   if (result.ec == std::errc::invalid_argument) {
@@ -72,8 +77,13 @@ bool SimpleAtof(absl::string_view str, float* out) {
 bool SimpleAtod(absl::string_view str, double* out) {
   *out = 0.0;
   str = StripAsciiWhitespace(str);
+  // std::from_chars doesn't accept an initial +, but SimpleAtod does, so if one
+  // is present, skip it, while avoiding accepting "+-0" as valid.
   if (!str.empty() && str[0] == '+') {
     str.remove_prefix(1);
+    if (!str.empty() && str[0] == '-') {
+      return false;
+    }
   }
   auto result = absl::from_chars(str.data(), str.data() + str.size(), *out);
   if (result.ec == std::errc::invalid_argument) {
diff --git a/absl/strings/numbers_test.cc b/absl/strings/numbers_test.cc
index 27616bf8..f3103106 100644
--- a/absl/strings/numbers_test.cc
+++ b/absl/strings/numbers_test.cc
@@ -392,6 +392,28 @@ TEST(NumbersTest, Atod) {
   EXPECT_TRUE(std::isnan(d));
 }
 
+TEST(NumbersTest, Prefixes) {
+  double d;
+  EXPECT_FALSE(absl::SimpleAtod("++1", &d));
+  EXPECT_FALSE(absl::SimpleAtod("+-1", &d));
+  EXPECT_FALSE(absl::SimpleAtod("-+1", &d));
+  EXPECT_FALSE(absl::SimpleAtod("--1", &d));
+  EXPECT_TRUE(absl::SimpleAtod("-1", &d));
+  EXPECT_EQ(d, -1.);
+  EXPECT_TRUE(absl::SimpleAtod("+1", &d));
+  EXPECT_EQ(d, +1.);
+
+  float f;
+  EXPECT_FALSE(absl::SimpleAtof("++1", &f));
+  EXPECT_FALSE(absl::SimpleAtof("+-1", &f));
+  EXPECT_FALSE(absl::SimpleAtof("-+1", &f));
+  EXPECT_FALSE(absl::SimpleAtof("--1", &f));
+  EXPECT_TRUE(absl::SimpleAtof("-1", &f));
+  EXPECT_EQ(f, -1.f);
+  EXPECT_TRUE(absl::SimpleAtof("+1", &f));
+  EXPECT_EQ(f, +1.f);
+}
+
 TEST(NumbersTest, Atoenum) {
   enum E01 {
     E01_zero = 0,