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-rw-r--r--absl/strings/BUILD.bazel4
-rw-r--r--absl/strings/CMakeLists.txt4
-rw-r--r--absl/strings/internal/str_format/extension_test.cc37
-rw-r--r--absl/strings/internal/str_format/output.h7
-rw-r--r--absl/strings/internal/str_format/output_test.cc8
-rw-r--r--absl/strings/str_format.h24
-rw-r--r--absl/synchronization/mutex.cc12
-rw-r--r--absl/types/BUILD.bazel6
-rw-r--r--absl/types/CMakeLists.txt6
-rw-r--r--absl/types/internal/conformance_profile.h599
-rw-r--r--absl/types/internal/conformance_testing.h1386
-rw-r--r--absl/types/internal/conformance_testing_helpers.h391
-rw-r--r--absl/types/internal/conformance_testing_test.cc372
-rw-r--r--absl/types/internal/parentheses.h34
-rw-r--r--absl/types/internal/transform_args.h246
15 files changed, 3093 insertions, 43 deletions
diff --git a/absl/strings/BUILD.bazel b/absl/strings/BUILD.bazel
index 404c707f..4ee5a2ca 100644
--- a/absl/strings/BUILD.bazel
+++ b/absl/strings/BUILD.bazel
@@ -651,6 +651,7 @@ cc_test(
copts = ABSL_TEST_COPTS,
visibility = ["//visibility:private"],
deps = [
+ ":cord",
":str_format",
":strings",
"//absl/base:core_headers",
@@ -666,8 +667,10 @@ cc_test(
copts = ABSL_TEST_COPTS,
visibility = ["//visibility:private"],
deps = [
+ ":cord",
":str_format",
":str_format_internal",
+ ":strings",
"@com_google_googletest//:gtest_main",
],
)
@@ -726,6 +729,7 @@ cc_test(
copts = ABSL_TEST_COPTS,
visibility = ["//visibility:private"],
deps = [
+ ":cord",
":str_format_internal",
"@com_google_googletest//:gtest_main",
],
diff --git a/absl/strings/CMakeLists.txt b/absl/strings/CMakeLists.txt
index 2106148c..10213022 100644
--- a/absl/strings/CMakeLists.txt
+++ b/absl/strings/CMakeLists.txt
@@ -409,6 +409,7 @@ absl_cc_test(
${ABSL_TEST_COPTS}
DEPS
absl::str_format
+ absl::cord
absl::strings
absl::core_headers
gmock_main
@@ -424,6 +425,8 @@ absl_cc_test(
DEPS
absl::str_format
absl::str_format_internal
+ absl::cord
+ absl::strings
gmock_main
)
@@ -487,6 +490,7 @@ absl_cc_test(
${ABSL_TEST_COPTS}
DEPS
absl::str_format_internal
+ absl::cord
gmock_main
)
diff --git a/absl/strings/internal/str_format/extension_test.cc b/absl/strings/internal/str_format/extension_test.cc
index 4e23fefb..dc5576b6 100644
--- a/absl/strings/internal/str_format/extension_test.cc
+++ b/absl/strings/internal/str_format/extension_test.cc
@@ -19,9 +19,27 @@
#include <random>
#include <string>
+#include "absl/strings/cord.h"
+#include "gtest/gtest.h"
#include "absl/strings/str_format.h"
+#include "absl/strings/string_view.h"
-#include "gtest/gtest.h"
+namespace my_namespace {
+class UserDefinedType {
+ public:
+ UserDefinedType() = default;
+
+ void Append(absl::string_view str) { value_.append(str.data(), str.size()); }
+ const std::string& Value() const { return value_; }
+
+ friend void AbslFormatFlush(UserDefinedType* x, absl::string_view str) {
+ x->Append(str);
+ }
+
+ private:
+ std::string value_;
+};
+} // namespace my_namespace
namespace {
@@ -63,4 +81,21 @@ TEST(FormatExtensionTest, SinkAppendChars) {
EXPECT_EQ(actual, expected);
}
}
+
+TEST(FormatExtensionTest, CordSink) {
+ absl::Cord c;
+ absl::Format(&c, "There were %04d little %s.", 3, "pigs");
+ EXPECT_EQ(c, "There were 0003 little pigs.");
+ absl::Format(&c, "And %-3llx bad wolf!", 1);
+ EXPECT_EQ(c, "There were 0003 little pigs.And 1 bad wolf!");
+}
+
+TEST(FormatExtensionTest, CustomSink) {
+ my_namespace::UserDefinedType sink;
+ absl::Format(&sink, "There were %04d little %s.", 3, "pigs");
+ EXPECT_EQ("There were 0003 little pigs.", sink.Value());
+ absl::Format(&sink, "And %-3llx bad wolf!", 1);
+ EXPECT_EQ("There were 0003 little pigs.And 1 bad wolf!", sink.Value());
+}
+
} // namespace
diff --git a/absl/strings/internal/str_format/output.h b/absl/strings/internal/str_format/output.h
index 28b288b7..c3168d20 100644
--- a/absl/strings/internal/str_format/output.h
+++ b/absl/strings/internal/str_format/output.h
@@ -91,10 +91,11 @@ inline void AbslFormatFlush(BufferRawSink* sink, string_view v) {
sink->Write(v);
}
+// This is a SFINAE to get a better compiler error message when the type
+// is not supported.
template <typename T>
-auto InvokeFlush(T* out, string_view s)
- -> decltype(str_format_internal::AbslFormatFlush(out, s)) {
- str_format_internal::AbslFormatFlush(out, s);
+auto InvokeFlush(T* out, string_view s) -> decltype(AbslFormatFlush(out, s)) {
+ AbslFormatFlush(out, s);
}
} // namespace str_format_internal
diff --git a/absl/strings/internal/str_format/output_test.cc b/absl/strings/internal/str_format/output_test.cc
index e54e6f70..ce2e91a0 100644
--- a/absl/strings/internal/str_format/output_test.cc
+++ b/absl/strings/internal/str_format/output_test.cc
@@ -19,6 +19,7 @@
#include "gmock/gmock.h"
#include "gtest/gtest.h"
+#include "absl/strings/cord.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
@@ -37,6 +38,12 @@ TEST(InvokeFlush, Stream) {
EXPECT_EQ(str.str(), "ABCDEF");
}
+TEST(InvokeFlush, Cord) {
+ absl::Cord str("ABC");
+ str_format_internal::InvokeFlush(&str, "DEF");
+ EXPECT_EQ(str, "ABCDEF");
+}
+
TEST(BufferRawSink, Limits) {
char buf[16];
{
@@ -70,4 +77,3 @@ TEST(BufferRawSink, Limits) {
} // namespace
ABSL_NAMESPACE_END
} // namespace absl
-
diff --git a/absl/strings/str_format.h b/absl/strings/str_format.h
index d40fca11..2e0b33f7 100644
--- a/absl/strings/str_format.h
+++ b/absl/strings/str_format.h
@@ -57,8 +57,7 @@
// arbitrary sink types:
//
// * A generic `Format()` function to write outputs to arbitrary sink types,
-// which must implement a `RawSinkFormat` interface. (See
-// `str_format_sink.h` for more information.)
+// which must implement a `FormatRawSink` interface.
//
// * A `FormatUntyped()` function that is similar to `Format()` except it is
// loosely typed. `FormatUntyped()` is not a template and does not perform
@@ -432,6 +431,16 @@ int SNPrintF(char* output, std::size_t size, const FormatSpec<Args...>& format,
//
// FormatRawSink is a type erased wrapper around arbitrary sink objects
// specifically used as an argument to `Format()`.
+//
+// All the object has to do define an overload of `AbslFormatFlush()` for the
+// sink, usually by adding a ADL-based free function in the same namespace as
+// the sink:
+//
+// void AbslFormatFlush(MySink* dest, absl::string_view part);
+//
+// where `dest` is the pointer passed to `absl::Format()`. The function should
+// append `part` to `dest`.
+//
// FormatRawSink does not own the passed sink object. The passed object must
// outlive the FormatRawSink.
class FormatRawSink {
@@ -455,12 +464,13 @@ class FormatRawSink {
// `absl::FormatRawSink` interface), using a format string and zero or more
// additional arguments.
//
-// By default, `std::string` and `std::ostream` are supported as destination
-// objects. If a `std::string` is used the formatted string is appended to it.
+// By default, `std::string`, `std::ostream`, and `absl::Cord` are supported as
+// destination objects. If a `std::string` is used the formatted string is
+// appended to it.
//
-// `absl::Format()` is a generic version of `absl::StrFormat(), for custom
-// sinks. The format string, like format strings for `StrFormat()`, is checked
-// at compile-time.
+// `absl::Format()` is a generic version of `absl::StrAppendFormat()`, for
+// custom sinks. The format string, like format strings for `StrFormat()`, is
+// checked at compile-time.
//
// On failure, this function returns `false` and the state of the sink is
// unspecified.
diff --git a/absl/synchronization/mutex.cc b/absl/synchronization/mutex.cc
index 6ee5f235..8cda5a1c 100644
--- a/absl/synchronization/mutex.cc
+++ b/absl/synchronization/mutex.cc
@@ -1439,20 +1439,18 @@ void Mutex::AssertNotHeld() const {
// may spin for a short while if the lock cannot be acquired immediately.
static bool TryAcquireWithSpinning(std::atomic<intptr_t>* mu) {
int c = mutex_globals.spinloop_iterations;
- int result = -1; // result of operation: 0=false, 1=true, -1=unknown
-
do { // do/while somewhat faster on AMD
intptr_t v = mu->load(std::memory_order_relaxed);
- if ((v & (kMuReader|kMuEvent)) != 0) { // a reader or tracing -> give up
- result = 0;
+ if ((v & (kMuReader|kMuEvent)) != 0) {
+ return false; // a reader or tracing -> give up
} else if (((v & kMuWriter) == 0) && // no holder -> try to acquire
mu->compare_exchange_strong(v, kMuWriter | v,
std::memory_order_acquire,
std::memory_order_relaxed)) {
- result = 1;
+ return true;
}
- } while (result == -1 && --c > 0);
- return result == 1;
+ } while (--c > 0);
+ return false;
}
ABSL_XRAY_LOG_ARGS(1) void Mutex::Lock() {
diff --git a/absl/types/BUILD.bazel b/absl/types/BUILD.bazel
index c64417cc..de71c734 100644
--- a/absl/types/BUILD.bazel
+++ b/absl/types/BUILD.bazel
@@ -216,11 +216,15 @@ cc_library(
"internal/conformance_aliases.h",
"internal/conformance_archetype.h",
"internal/conformance_profile.h",
+ "internal/conformance_testing.h",
+ "internal/conformance_testing_helpers.h",
+ "internal/parentheses.h",
+ "internal/transform_args.h",
],
copts = ABSL_TEST_COPTS,
linkopts = ABSL_DEFAULT_LINKOPTS,
deps = [
- "//absl/debugging:demangle_internal",
+ "//absl/algorithm:container",
"//absl/meta:type_traits",
"//absl/strings",
"//absl/utility",
diff --git a/absl/types/CMakeLists.txt b/absl/types/CMakeLists.txt
index 1b4d453b..71b339ae 100644
--- a/absl/types/CMakeLists.txt
+++ b/absl/types/CMakeLists.txt
@@ -246,9 +246,14 @@ absl_cc_library(
"internal/conformance_aliases.h"
"internal/conformance_archetype.h"
"internal/conformance_profile.h"
+ "internal/conformance_testing.h",
+ "internal/conformance_testing_helpers.h",
+ "internal/parentheses.h",
+ "internal/transform_args.h",
COPTS
${ABSL_DEFAULT_COPTS}
DEPS
+ absl::algorithm
absl::debugging
absl::type_traits
absl::strings
@@ -282,6 +287,7 @@ absl_cc_test(
${ABSL_TEST_COPTS}
DEPS
absl::conformance_testing
+ absl::type_traits
gmock_main
)
diff --git a/absl/types/internal/conformance_profile.h b/absl/types/internal/conformance_profile.h
index e62004fd..cf64ff4f 100644
--- a/absl/types/internal/conformance_profile.h
+++ b/absl/types/internal/conformance_profile.h
@@ -36,10 +36,19 @@
#ifndef ABSL_TYPES_INTERNAL_CONFORMANCE_PROFILE_H_
#define ABSL_TYPES_INTERNAL_CONFORMANCE_PROFILE_H_
+#include <set>
#include <type_traits>
#include <utility>
+#include <vector>
+#include "gtest/gtest.h"
+#include "absl/algorithm/container.h"
#include "absl/meta/type_traits.h"
+#include "absl/strings/ascii.h"
+#include "absl/strings/str_cat.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/internal/conformance_testing_helpers.h"
+#include "absl/utility/utility.h"
// TODO(calabrese) Add support for extending profiles.
@@ -47,6 +56,187 @@ namespace absl {
ABSL_NAMESPACE_BEGIN
namespace types_internal {
+// Converts an enum to its underlying integral value.
+template <typename Enum>
+constexpr absl::underlying_type_t<Enum> UnderlyingValue(Enum value) {
+ return static_cast<absl::underlying_type_t<Enum>>(value);
+}
+
+// A tag type used in place of a matcher when checking that an assertion result
+// does not actually contain any errors.
+struct NoError {};
+
+// -----------------------------------------------------------------------------
+// ConformanceErrors
+// -----------------------------------------------------------------------------
+class ConformanceErrors {
+ public:
+ // Setup the error reporting mechanism by seeding it with the name of the type
+ // that is being tested.
+ explicit ConformanceErrors(std::string type_name)
+ : assertion_result_(false), type_name_(std::move(type_name)) {
+ assertion_result_ << "\n\n"
+ "Assuming the following type alias:\n"
+ "\n"
+ " using _T = "
+ << type_name_ << ";\n\n";
+ outputDivider();
+ }
+
+ // Adds the test name to the list of successfully run tests iff it was not
+ // previously reported as failing. This behavior is useful for tests that
+ // have multiple parts, where failures and successes are reported individually
+ // with the same test name.
+ void addTestSuccess(absl::string_view test_name) {
+ auto normalized_test_name = absl::AsciiStrToLower(test_name);
+
+ // If the test is already reported as failing, do not add it to the list of
+ // successes.
+ if (test_failures_.find(normalized_test_name) == test_failures_.end()) {
+ test_successes_.insert(std::move(normalized_test_name));
+ }
+ }
+
+ // Streams a single error description into the internal buffer (a visual
+ // divider is automatically inserted after the error so that multiple errors
+ // are visibly distinct).
+ //
+ // This function increases the error count by 1.
+ //
+ // TODO(calabrese) Determine desired behavior when if this function throws.
+ template <class... P>
+ void addTestFailure(absl::string_view test_name, const P&... args) {
+ // Output a message related to the test failure.
+ assertion_result_ << "\n\n"
+ "Failed test: "
+ << test_name << "\n\n";
+ addTestFailureImpl(args...);
+ assertion_result_ << "\n\n";
+ outputDivider();
+
+ auto normalized_test_name = absl::AsciiStrToLower(test_name);
+
+ // If previous parts of this test succeeded, remove it from that set.
+ test_successes_.erase(normalized_test_name);
+
+ // Add the test name to the list of failed tests.
+ test_failures_.insert(std::move(normalized_test_name));
+
+ has_error_ = true;
+ }
+
+ // Convert this object into a testing::AssertionResult instance such that it
+ // can be used with gtest.
+ ::testing::AssertionResult assertionResult() const {
+ return has_error_ ? assertion_result_ : ::testing::AssertionSuccess();
+ }
+
+ // Convert this object into a testing::AssertionResult instance such that it
+ // can be used with gtest. This overload expects errors, using the specified
+ // matcher.
+ ::testing::AssertionResult expectFailedTests(
+ const std::set<std::string>& test_names) const {
+ // Since we are expecting nonconformance, output an error message when the
+ // type actually conformed to the specified profile.
+ if (!has_error_) {
+ return ::testing::AssertionFailure()
+ << "Unexpected conformance of type:\n"
+ " "
+ << type_name_ << "\n\n";
+ }
+
+ // Get a list of all expected failures that did not actually fail
+ // (or that were not run).
+ std::vector<std::string> nonfailing_tests;
+ absl::c_set_difference(test_names, test_failures_,
+ std::back_inserter(nonfailing_tests));
+
+ // Get a list of all "expected failures" that were never actually run.
+ std::vector<std::string> unrun_tests;
+ absl::c_set_difference(nonfailing_tests, test_successes_,
+ std::back_inserter(unrun_tests));
+
+ // Report when the user specified tests that were not run.
+ if (!unrun_tests.empty()) {
+ const bool tests_were_run =
+ !(test_failures_.empty() && test_successes_.empty());
+
+ // Prepare an assertion result used in the case that tests pass that were
+ // expected to fail.
+ ::testing::AssertionResult result = ::testing::AssertionFailure();
+ result << "When testing type:\n " << type_name_
+ << "\n\nThe following tests were expected to fail but were not "
+ "run";
+
+ if (tests_were_run) result << " (was the test name spelled correctly?)";
+
+ result << ":\n\n";
+
+ // List all of the tests that unexpectedly passed.
+ for (const auto& test_name : unrun_tests) {
+ result << " " << test_name << "\n";
+ }
+
+ if (!tests_were_run) result << "\nNo tests were run.";
+
+ if (!test_failures_.empty()) {
+ // List test failures
+ result << "\nThe tests that were run and failed are:\n\n";
+ for (const auto& test_name : test_failures_) {
+ result << " " << test_name << "\n";
+ }
+ }
+
+ if (!test_successes_.empty()) {
+ // List test successes
+ result << "\nThe tests that were run and succeeded are:\n\n";
+ for (const auto& test_name : test_successes_) {
+ result << " " << test_name << "\n";
+ }
+ }
+
+ return result;
+ }
+
+ // If some tests passed when they were expected to fail, alert the caller.
+ if (nonfailing_tests.empty()) return ::testing::AssertionSuccess();
+
+ // Prepare an assertion result used in the case that tests pass that were
+ // expected to fail.
+ ::testing::AssertionResult unexpected_successes =
+ ::testing::AssertionFailure();
+ unexpected_successes << "When testing type:\n " << type_name_
+ << "\n\nThe following tests passed when they were "
+ "expected to fail:\n\n";
+
+ // List all of the tests that unexpectedly passed.
+ for (const auto& test_name : nonfailing_tests) {
+ unexpected_successes << " " << test_name << "\n";
+ }
+
+ return unexpected_successes;
+ }
+
+ private:
+ void outputDivider() {
+ assertion_result_ << "========================================";
+ }
+
+ void addTestFailureImpl() {}
+
+ template <class H, class... T>
+ void addTestFailureImpl(const H& head, const T&... tail) {
+ assertion_result_ << head;
+ addTestFailureImpl(tail...);
+ }
+
+ ::testing::AssertionResult assertion_result_;
+ std::set<std::string> test_failures_;
+ std::set<std::string> test_successes_;
+ std::string type_name_;
+ bool has_error_ = false;
+};
+
template <class T, class /*Enabler*/ = void>
struct PropertiesOfImpl {};
@@ -70,31 +260,100 @@ using PropertiesOfT = typename PropertiesOf<T>::type;
// standard trait names, which is useful since it allows us to match up each
// enum name with a corresponding trait name in macro definitions.
-enum class function_kind { maybe, yes, nothrow, trivial };
+// An enum that describes the various expectations on an operations existence.
+enum class function_support { maybe, yes, nothrow, trivial };
+
+constexpr const char* PessimisticPropertyDescription(function_support v) {
+ return v == function_support::maybe
+ ? "no"
+ : v == function_support::yes
+ ? "yes, potentially throwing"
+ : v == function_support::nothrow ? "yes, nothrow"
+ : "yes, trivial";
+}
+
+// Return a string that describes the kind of property support that was
+// expected.
+inline std::string ExpectedFunctionKindList(function_support min,
+ function_support max) {
+ if (min == max) {
+ std::string result =
+ absl::StrCat("Expected:\n ",
+ PessimisticPropertyDescription(
+ static_cast<function_support>(UnderlyingValue(min))),
+ "\n");
+ return result;
+ }
+
+ std::string result = "Expected one of:\n";
+ for (auto curr_support = UnderlyingValue(min);
+ curr_support <= UnderlyingValue(max); ++curr_support) {
+ absl::StrAppend(&result, " ",
+ PessimisticPropertyDescription(
+ static_cast<function_support>(curr_support)),
+ "\n");
+ }
+
+ return result;
+}
-#define ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM(name) \
- enum class name { maybe, yes, nothrow, trivial }
+template <class Enum>
+void ExpectModelOfImpl(ConformanceErrors* errors, Enum min_support,
+ Enum max_support, Enum kind) {
+ const auto kind_value = UnderlyingValue(kind);
+ const auto min_support_value = UnderlyingValue(min_support);
+ const auto max_support_value = UnderlyingValue(max_support);
+
+ if (!(kind_value >= min_support_value && kind_value <= max_support_value)) {
+ errors->addTestFailure(
+ PropertyName(kind), "**Failed property expectation**\n\n",
+ ExpectedFunctionKindList(
+ static_cast<function_support>(min_support_value),
+ static_cast<function_support>(max_support_value)),
+ '\n', "Actual:\n ",
+ PessimisticPropertyDescription(
+ static_cast<function_support>(kind_value)));
+ } else {
+ errors->addTestSuccess(PropertyName(kind));
+ }
+}
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM(default_constructible);
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM(move_constructible);
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM(copy_constructible);
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM(move_assignable);
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM(copy_assignable);
-ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM(destructible);
+#define ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM(description, name) \
+ enum class name { maybe, yes, nothrow, trivial }; \
+ \
+ constexpr const char* PropertyName(name v) { return description; } \
+ static_assert(true, "") // Force a semicolon when using this macro.
+
+ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for default construction",
+ default_constructible);
+ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for move construction",
+ move_constructible);
+ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for copy construction",
+ copy_constructible);
+ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for move assignment",
+ move_assignable);
+ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for copy assignment",
+ copy_assignable);
+ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM("support for destruction",
+ destructible);
#undef ABSL_INTERNAL_SPECIAL_MEMBER_FUNCTION_ENUM
-#define ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM(name) \
- enum class name { maybe, yes, nothrow }
+#define ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM(description, name) \
+ enum class name { maybe, yes, nothrow }; \
+ \
+ constexpr const char* PropertyName(name v) { return description; } \
+ static_assert(true, "") // Force a semicolon when using this macro.
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM(equality_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM(inequality_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM(less_than_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM(less_equal_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM(greater_equal_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM(greater_than_comparable);
+ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for ==", equality_comparable);
+ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for !=", inequality_comparable);
+ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for <", less_than_comparable);
+ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for <=", less_equal_comparable);
+ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for >=",
+ greater_equal_comparable);
+ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for >", greater_than_comparable);
-ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM(swappable);
+ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM("support for swap", swappable);
#undef ABSL_INTERNAL_INTRINSIC_FUNCTION_ENUM
@@ -104,6 +363,184 @@ constexpr const char* PropertyName(hashable v) {
return "support for std::hash";
}
+template <class T>
+using AlwaysFalse = std::false_type;
+
+#define ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(name, property) \
+ template <class T> \
+ constexpr property property##_support_of() { \
+ return std::is_##property<T>::value \
+ ? std::is_nothrow_##property<T>::value \
+ ? absl::is_trivially_##property<T>::value \
+ ? property::trivial \
+ : property::nothrow \
+ : property::yes \
+ : property::maybe; \
+ } \
+ \
+ template <class T, class MinProf, class MaxProf> \
+ void ExpectModelOf##name(ConformanceErrors* errors) { \
+ (ExpectModelOfImpl)(errors, PropertiesOfT<MinProf>::property##_support, \
+ PropertiesOfT<MaxProf>::property##_support, \
+ property##_support_of<T>()); \
+ }
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(DefaultConstructible,
+ default_constructible);
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(MoveConstructible,
+ move_constructible);
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(CopyConstructible,
+ copy_constructible);
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(MoveAssignable,
+ move_assignable);
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(CopyAssignable,
+ copy_assignable);
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER(Destructible, destructible);
+
+#undef ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_SPECIAL_MEMBER
+
+void BoolFunction(bool) noexcept;
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A metafunction for checking if an operation exists through SFINAE.
+//
+// `T` is the type to test and Op is an alias containing the expression to test.
+template <class T, template <class...> class Op, class = void>
+struct IsOpableImpl : std::false_type {};
+
+template <class T, template <class...> class Op>
+struct IsOpableImpl<T, Op, absl::void_t<Op<T>>> : std::true_type {};
+
+template <template <class...> class Op>
+struct IsOpable {
+ template <class T>
+ using apply = typename IsOpableImpl<T, Op>::type;
+};
+//
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A metafunction for checking if an operation exists and is also noexcept
+// through SFINAE and the noexcept operator.
+///
+// `T` is the type to test and Op is an alias containing the expression to test.
+template <class T, template <class...> class Op, class = void>
+struct IsNothrowOpableImpl : std::false_type {};
+
+template <class T, template <class...> class Op>
+struct IsNothrowOpableImpl<T, Op, absl::enable_if_t<Op<T>::value>>
+ : std::true_type {};
+
+template <template <class...> class Op>
+struct IsNothrowOpable {
+ template <class T>
+ using apply = typename IsNothrowOpableImpl<T, Op>::type;
+};
+//
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A macro that produces the necessary function for reporting what kind of
+// support a specific comparison operation has and a function for reporting an
+// error if a given type's support for that operation does not meet the expected
+// requirements.
+#define ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(name, property, op) \
+ template <class T, \
+ class Result = std::integral_constant< \
+ bool, noexcept((BoolFunction)(std::declval<const T&>() op \
+ std::declval<const T&>()))>> \
+ using name = Result; \
+ \
+ template <class T> \
+ constexpr property property##_support_of() { \
+ return IsOpable<name>::apply<T>::value \
+ ? IsNothrowOpable<name>::apply<T>::value ? property::nothrow \
+ : property::yes \
+ : property::maybe; \
+ } \
+ \
+ template <class T, class MinProf, class MaxProf> \
+ void ExpectModelOf##name(ConformanceErrors* errors) { \
+ (ExpectModelOfImpl)(errors, PropertiesOfT<MinProf>::property##_support, \
+ PropertiesOfT<MaxProf>::property##_support, \
+ property##_support_of<T>()); \
+ }
+//
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Generate the necessary support-checking and error reporting functions for
+// each of the comparison operators.
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(EqualityComparable,
+ equality_comparable, ==);
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(InequalityComparable,
+ inequality_comparable, !=);
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(LessThanComparable,
+ less_than_comparable, <);
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(LessEqualComparable,
+ less_equal_comparable, <=);
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(GreaterEqualComparable,
+ greater_equal_comparable, >=);
+
+ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON(GreaterThanComparable,
+ greater_than_comparable, >);
+
+#undef ABSL_INTERNAL_PESSIMISTIC_MODEL_OF_COMPARISON
+//
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// The necessary support-checking and error-reporting functions for swap.
+template <class T>
+constexpr swappable swappable_support_of() {
+ return type_traits_internal::IsSwappable<T>::value
+ ? type_traits_internal::IsNothrowSwappable<T>::value
+ ? swappable::nothrow
+ : swappable::yes
+ : swappable::maybe;
+}
+
+template <class T, class MinProf, class MaxProf>
+void ExpectModelOfSwappable(ConformanceErrors* errors) {
+ (ExpectModelOfImpl)(errors, PropertiesOfT<MinProf>::swappable_support,
+ PropertiesOfT<MaxProf>::swappable_support,
+ swappable_support_of<T>());
+}
+//
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// The necessary support-checking and error-reporting functions for std::hash.
+template <class T>
+constexpr hashable hashable_support_of() {
+ return type_traits_internal::IsHashable<T>::value ? hashable::yes
+ : hashable::maybe;
+}
+
+template <class T, class MinProf, class MaxProf>
+void ExpectModelOfHashable(ConformanceErrors* errors) {
+ (ExpectModelOfImpl)(errors, PropertiesOfT<MinProf>::hashable_support,
+ PropertiesOfT<MaxProf>::hashable_support,
+ hashable_support_of<T>());
+}
+//
+////////////////////////////////////////////////////////////////////////////////
+
template <
default_constructible DefaultConstructibleValue =
default_constructible::maybe,
@@ -216,6 +653,45 @@ struct ConformanceProfile {
HashableValue != hashable::maybe;
};
+////////////////////////////////////////////////////////////////////////////////
+//
+// Compliant SFINAE-friendliness is not always present on the standard library
+// implementations that we support. This helper-struct (and associated enum) is
+// used as a means to conditionally check the hashability support of a type.
+enum class CheckHashability { no, yes };
+
+template <class T, CheckHashability ShouldCheckHashability>
+struct conservative_hashable_support_of;
+
+template <class T>
+struct conservative_hashable_support_of<T, CheckHashability::no> {
+ static constexpr hashable Invoke() { return hashable::maybe; }
+};
+
+template <class T>
+struct conservative_hashable_support_of<T, CheckHashability::yes> {
+ static constexpr hashable Invoke() { return hashable_support_of<T>(); }
+};
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// The ConformanceProfile that is expected based on introspection into the type
+// by way of trait checks.
+template <class T, CheckHashability ShouldCheckHashability>
+struct SyntacticConformanceProfileOf {
+ using properties = ConformanceProfile<
+ default_constructible_support_of<T>(), move_constructible_support_of<T>(),
+ copy_constructible_support_of<T>(), move_assignable_support_of<T>(),
+ copy_assignable_support_of<T>(), destructible_support_of<T>(),
+ equality_comparable_support_of<T>(),
+ inequality_comparable_support_of<T>(),
+ less_than_comparable_support_of<T>(),
+ less_equal_comparable_support_of<T>(),
+ greater_equal_comparable_support_of<T>(),
+ greater_than_comparable_support_of<T>(), swappable_support_of<T>(),
+ conservative_hashable_support_of<T, ShouldCheckHashability>::Invoke()>;
+};
+
#define ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF_IMPL(type, name) \
template <default_constructible DefaultConstructibleValue, \
move_constructible MoveConstructibleValue, \
@@ -261,12 +737,80 @@ ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF(hashable);
#undef ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF
#undef ABSL_INTERNAL_CONFORMANCE_TESTING_DATA_MEMBER_DEF_IMPL
-// Converts an enum to its underlying integral value.
-template <class Enum>
-constexpr absl::underlying_type_t<Enum> UnderlyingValue(Enum value) {
- return static_cast<absl::underlying_type_t<Enum>>(value);
+// Retrieve the enum with the minimum underlying value.
+// Note: std::min is not constexpr in C++11, which is why this is necessary.
+template <class H>
+constexpr H MinEnum(H head) {
+ return head;
}
+template <class H, class N, class... T>
+constexpr H MinEnum(H head, N next, T... tail) {
+ return (UnderlyingValue)(head) < (UnderlyingValue)(next)
+ ? (MinEnum)(head, tail...)
+ : (MinEnum)(next, tail...);
+}
+
+template <class... Profs>
+struct MinimalProfiles {
+ static constexpr default_constructible
+ default_constructible_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::default_constructible_support...);
+
+ static constexpr move_constructible move_constructible_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::move_constructible_support...);
+
+ static constexpr copy_constructible copy_constructible_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::copy_constructible_support...);
+
+ static constexpr move_assignable move_assignable_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::move_assignable_support...);
+
+ static constexpr copy_assignable copy_assignable_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::copy_assignable_support...);
+
+ static constexpr destructible destructible_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::destructible_support...);
+
+ static constexpr equality_comparable equality_comparable_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::equality_comparable_support...);
+
+ static constexpr inequality_comparable
+ inequality_comparable_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::inequality_comparable_support...);
+
+ static constexpr less_than_comparable
+ less_than_comparable_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::less_than_comparable_support...);
+
+ static constexpr less_equal_comparable
+ less_equal_comparable_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::less_equal_comparable_support...);
+
+ static constexpr greater_equal_comparable
+ greater_equal_comparable_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::greater_equal_comparable_support...);
+
+ static constexpr greater_than_comparable
+ greater_than_comparable_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::greater_than_comparable_support...);
+
+ static constexpr swappable swappable_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::swappable_support...);
+
+ static constexpr hashable hashable_support = // NOLINT
+ (MinEnum)(PropertiesOfT<Profs>::hashable_support...);
+
+ using properties = ConformanceProfile<
+ default_constructible_support, move_constructible_support,
+ copy_constructible_support, move_assignable_support,
+ copy_assignable_support, destructible_support,
+ equality_comparable_support, inequality_comparable_support,
+ less_than_comparable_support, less_equal_comparable_support,
+ greater_equal_comparable_support, greater_than_comparable_support,
+ swappable_support, hashable_support>;
+};
+
// Retrieve the enum with the greatest underlying value.
// Note: std::max is not constexpr in C++11, which is why this is necessary.
template <class H>
@@ -369,6 +913,17 @@ struct IsProfileImpl<T, absl::void_t<PropertiesOfT<T>>> : std::true_type {};
template <class T>
struct IsProfile : IsProfileImpl<T>::type {};
+// A tag that describes which set of properties we will check when the user
+// requires a strict match in conformance (as opposed to a loose match which
+// allows more-refined support of any given operation).
+//
+// Currently only the RegularityDomain exists and it includes all operations
+// that the conformance testing suite knows about. The intent is that if the
+// suite is expanded to support extension, such as for checking conformance of
+// concepts like Iterators or Containers, additional corresponding domains can
+// be created.
+struct RegularityDomain {};
+
} // namespace types_internal
ABSL_NAMESPACE_END
} // namespace absl
diff --git a/absl/types/internal/conformance_testing.h b/absl/types/internal/conformance_testing.h
new file mode 100644
index 00000000..487b0f78
--- /dev/null
+++ b/absl/types/internal/conformance_testing.h
@@ -0,0 +1,1386 @@
+// 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.
+//
+// -----------------------------------------------------------------------------
+// conformance_testing.h
+// -----------------------------------------------------------------------------
+//
+
+#ifndef ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_H_
+#define ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_H_
+
+////////////////////////////////////////////////////////////////////////////////
+// //
+// Many templates in this file take a `T` and a `Prof` type as explicit //
+// template arguments. These are a type to be checked and a //
+// "Regularity Profile" that describes what operations that type `T` is //
+// expected to support. See "regularity_profiles.h" for more details //
+// regarding Regularity Profiles. //
+// //
+////////////////////////////////////////////////////////////////////////////////
+
+#include <cstddef>
+#include <set>
+#include <tuple>
+#include <type_traits>
+#include <utility>
+
+#include "gtest/gtest.h"
+#include "absl/meta/type_traits.h"
+#include "absl/strings/ascii.h"
+#include "absl/strings/str_cat.h"
+#include "absl/strings/string_view.h"
+#include "absl/types/internal/conformance_aliases.h"
+#include "absl/types/internal/conformance_archetype.h"
+#include "absl/types/internal/conformance_profile.h"
+#include "absl/types/internal/conformance_testing_helpers.h"
+#include "absl/types/internal/parentheses.h"
+#include "absl/types/internal/transform_args.h"
+#include "absl/utility/utility.h"
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace types_internal {
+
+// Returns true if the compiler incorrectly greedily instantiates constexpr
+// templates in any unevaluated context.
+constexpr bool constexpr_instantiation_when_unevaluated() {
+#if defined(__apple_build_version__) // TODO(calabrese) Make more specific
+ return true;
+#elif defined(__clang__)
+ return __clang_major__ < 4;
+#elif defined(__GNUC__)
+ // TODO(calabrese) Figure out why gcc 7 fails (seems like a different bug)
+ return __GNUC__ < 5 || (__GNUC__ == 5 && __GNUC_MINOR__ < 2) || __GNUC__ >= 7;
+#else
+ return false;
+#endif
+}
+
+// Returns true if the standard library being used incorrectly produces an error
+// when instantiating the definition of a poisoned std::hash specialization.
+constexpr bool poisoned_hash_fails_instantiation() {
+#if defined(_MSC_VER) && !defined(_LIBCPP_VERSION)
+ return _MSC_VER < 1914;
+#else
+ return false;
+#endif
+}
+
+template <class Fun>
+struct GeneratorType {
+ decltype(std::declval<const Fun&>()()) operator()() const
+ noexcept(noexcept(std::declval<const Fun&>()())) {
+ return fun();
+ }
+
+ Fun fun;
+ const char* description;
+};
+
+// A "make" function for the GeneratorType template that deduces the function
+// object type.
+template <class Fun,
+ absl::enable_if_t<IsNullaryCallable<Fun>::value>** = nullptr>
+GeneratorType<Fun> Generator(Fun fun, const char* description) {
+ return GeneratorType<Fun>{absl::move(fun), description};
+}
+
+// A type that contains a set of nullary function objects that each return an
+// instance of the same type and value (though possibly different
+// representations, such as +0 and -0 or two vectors with the same elements but
+// with different capacities).
+template <class... Funs>
+struct EquivalenceClassType {
+ std::tuple<GeneratorType<Funs>...> generators;
+};
+
+// A "make" function for the EquivalenceClassType template that deduces the
+// function object types and is constrained such that a user can only pass in
+// function objects that all have the same return type.
+template <class... Funs, absl::enable_if_t<AreGeneratorsWithTheSameReturnType<
+ Funs...>::value>** = nullptr>
+EquivalenceClassType<Funs...> EquivalenceClass(GeneratorType<Funs>... funs) {
+ return {std::make_tuple(absl::move(funs)...)};
+}
+
+// A type that contains an ordered series of EquivalenceClassTypes, from
+// smallest value to largest value.
+template <class... EqClasses>
+struct OrderedEquivalenceClasses {
+ std::tuple<EqClasses...> eq_classes;
+};
+
+// An object containing the parts of a given (name, initialization expression),
+// and is capable of generating a string that describes the given.
+struct GivenDeclaration {
+ std::string outputDeclaration(std::size_t width) const {
+ const std::size_t indent_size = 2;
+ std::string result = absl::StrCat(" ", name);
+
+ if (!expression.empty()) {
+ // Indent
+ result.resize(indent_size + width, ' ');
+ absl::StrAppend(&result, " = ", expression, ";\n");
+ } else {
+ absl::StrAppend(&result, ";\n");
+ }
+
+ return result;
+ }
+
+ std::string name;
+ std::string expression;
+};
+
+// Produce a string that contains all of the givens of an error report.
+template <class... Decls>
+std::string PrepareGivenContext(const Decls&... decls) {
+ const std::size_t width = (std::max)({decls.name.size()...});
+ return absl::StrCat("Given:\n", decls.outputDeclaration(width)..., "\n");
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Function objects that perform a check for each comparison operator //
+////////////////////////////////////////////////////////////////////////////////
+
+#define ABSL_INTERNAL_EXPECT_OP(name, op) \
+ struct Expect##name { \
+ template <class T> \
+ void operator()(absl::string_view test_name, absl::string_view context, \
+ const T& lhs, const T& rhs, absl::string_view lhs_name, \
+ absl::string_view rhs_name) const { \
+ if (!static_cast<bool>(lhs op rhs)) { \
+ errors->addTestFailure( \
+ test_name, absl::StrCat(context, \
+ "**Unexpected comparison result**\n" \
+ "\n" \
+ "Expression:\n" \
+ " ", \
+ lhs_name, " " #op " ", rhs_name, \
+ "\n" \
+ "\n" \
+ "Expected: true\n" \
+ " Actual: false")); \
+ } else { \
+ errors->addTestSuccess(test_name); \
+ } \
+ } \
+ \
+ ConformanceErrors* errors; \
+ }; \
+ \
+ struct ExpectNot##name { \
+ template <class T> \
+ void operator()(absl::string_view test_name, absl::string_view context, \
+ const T& lhs, const T& rhs, absl::string_view lhs_name, \
+ absl::string_view rhs_name) const { \
+ if (lhs op rhs) { \
+ errors->addTestFailure( \
+ test_name, absl::StrCat(context, \
+ "**Unexpected comparison result**\n" \
+ "\n" \
+ "Expression:\n" \
+ " ", \
+ lhs_name, " " #op " ", rhs_name, \
+ "\n" \
+ "\n" \
+ "Expected: false\n" \
+ " Actual: true")); \
+ } else { \
+ errors->addTestSuccess(test_name); \
+ } \
+ } \
+ \
+ ConformanceErrors* errors; \
+ }
+
+ABSL_INTERNAL_EXPECT_OP(Eq, ==);
+ABSL_INTERNAL_EXPECT_OP(Ne, !=);
+ABSL_INTERNAL_EXPECT_OP(Lt, <);
+ABSL_INTERNAL_EXPECT_OP(Le, <=);
+ABSL_INTERNAL_EXPECT_OP(Ge, >=);
+ABSL_INTERNAL_EXPECT_OP(Gt, >);
+
+#undef ABSL_INTERNAL_EXPECT_OP
+
+// A function object that verifies that two objects hash to the same value by
+// way of the std::hash specialization.
+struct ExpectSameHash {
+ template <class T>
+ void operator()(absl::string_view test_name, absl::string_view context,
+ const T& lhs, const T& rhs, absl::string_view lhs_name,
+ absl::string_view rhs_name) const {
+ if (std::hash<T>()(lhs) != std::hash<T>()(rhs)) {
+ errors->addTestFailure(
+ test_name, absl::StrCat(context,
+ "**Unexpected hash result**\n"
+ "\n"
+ "Expression:\n"
+ " std::hash<T>()(",
+ lhs_name, ") == std::hash<T>()(", rhs_name,
+ ")\n"
+ "\n"
+ "Expected: true\n"
+ " Actual: false"));
+ } else {
+ errors->addTestSuccess(test_name);
+ }
+ }
+
+ ConformanceErrors* errors;
+};
+
+// A function template that takes two objects and verifies that each comparison
+// operator behaves in a way that is consistent with equality. It has "OneWay"
+// in the name because the first argument will always be the left-hand operand
+// of the corresponding comparison operator and the second argument will
+// always be the right-hand operand. It will never switch that order.
+// At a higher level in the test suite, the one-way form is called once for each
+// of the two possible orders whenever lhs and rhs are not the same initializer.
+template <class T, class Prof>
+void ExpectOneWayEquality(ConformanceErrors* errors,
+ absl::string_view test_name,
+ absl::string_view context, const T& lhs, const T& rhs,
+ absl::string_view lhs_name,
+ absl::string_view rhs_name) {
+ If<PropertiesOfT<Prof>::is_equality_comparable>::Invoke(
+ ExpectEq{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
+
+ If<PropertiesOfT<Prof>::is_inequality_comparable>::Invoke(
+ ExpectNotNe{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
+
+ If<PropertiesOfT<Prof>::is_less_than_comparable>::Invoke(
+ ExpectNotLt{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
+
+ If<PropertiesOfT<Prof>::is_less_equal_comparable>::Invoke(
+ ExpectLe{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
+
+ If<PropertiesOfT<Prof>::is_greater_equal_comparable>::Invoke(
+ ExpectGe{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
+
+ If<PropertiesOfT<Prof>::is_greater_than_comparable>::Invoke(
+ ExpectNotGt{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
+
+ If<PropertiesOfT<Prof>::is_hashable>::Invoke(
+ ExpectSameHash{errors}, test_name, context, lhs, rhs, lhs_name, rhs_name);
+}
+
+// A function template that takes two objects and verifies that each comparison
+// operator behaves in a way that is consistent with equality. This function
+// differs from ExpectOneWayEquality in that this will do checks with argument
+// order reversed in addition to in-order.
+template <class T, class Prof>
+void ExpectEquality(ConformanceErrors* errors, absl::string_view test_name,
+ absl::string_view context, const T& lhs, const T& rhs,
+ absl::string_view lhs_name, absl::string_view rhs_name) {
+ (ExpectOneWayEquality<T, Prof>)(errors, test_name, context, lhs, rhs,
+ lhs_name, rhs_name);
+ (ExpectOneWayEquality<T, Prof>)(errors, test_name, context, rhs, lhs,
+ rhs_name, lhs_name);
+}
+
+// Given a generator, makes sure that a generated value and a moved-from
+// generated value are equal.
+template <class T, class Prof>
+struct ExpectMoveConstructOneGenerator {
+ template <class Fun>
+ void operator()(const Fun& generator) const {
+ const T object = generator();
+ const T moved_object = absl::move(generator()); // Force no elision.
+
+ (ExpectEquality<T, Prof>)(errors, "Move construction",
+ PrepareGivenContext(
+ GivenDeclaration{"const _T object",
+ generator.description},
+ GivenDeclaration{"const _T moved_object",
+ std::string("std::move(") +
+ generator.description +
+ ")"}),
+ object, moved_object, "object", "moved_object");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Given a generator, makes sure that a generated value and a copied-from
+// generated value are equal.
+template <class T, class Prof>
+struct ExpectCopyConstructOneGenerator {
+ template <class Fun>
+ void operator()(const Fun& generator) const {
+ const T object = generator();
+ const T copied_object = static_cast<const T&>(generator());
+
+ (ExpectEquality<T, Prof>)(errors, "Copy construction",
+ PrepareGivenContext(
+ GivenDeclaration{"const _T object",
+ generator.description},
+ GivenDeclaration{
+ "const _T copied_object",
+ std::string("static_cast<const _T&>(") +
+ generator.description + ")"}),
+ object, copied_object, "object", "copied_object");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Default-construct and do nothing before destruction.
+//
+// This is useful in exercising the codepath of default construction followed by
+// destruction, but does not explicitly test anything. An example of where this
+// might fail is a default destructor that default-initializes a scalar and a
+// destructor reads the value of that member. Sanitizers can catch this as long
+// as our test attempts to execute such a case.
+template <class T>
+struct ExpectDefaultConstructWithDestruct {
+ void operator()() const {
+ // Scoped so that destructor gets called before reporting success.
+ {
+ T object;
+ static_cast<void>(object);
+ }
+
+ errors->addTestSuccess("Default construction");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Check move-assign into a default-constructed object.
+template <class T, class Prof>
+struct ExpectDefaultConstructWithMoveAssign {
+ template <class Fun>
+ void operator()(const Fun& generator) const {
+ const T source_of_truth = generator();
+ T object;
+ object = generator();
+
+ (ExpectEquality<T, Prof>)(errors, "Move assignment",
+ PrepareGivenContext(
+ GivenDeclaration{"const _T object",
+ generator.description},
+ GivenDeclaration{"_T object", ""},
+ GivenDeclaration{"object",
+ generator.description}),
+ object, source_of_truth, "std::as_const(object)",
+ "source_of_truth");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Check copy-assign into a default-constructed object.
+template <class T, class Prof>
+struct ExpectDefaultConstructWithCopyAssign {
+ template <class Fun>
+ void operator()(const Fun& generator) const {
+ const T source_of_truth = generator();
+ T object;
+ object = static_cast<const T&>(generator());
+
+ (ExpectEquality<T, Prof>)(errors, "Copy assignment",
+ PrepareGivenContext(
+ GivenDeclaration{"const _T source_of_truth",
+ generator.description},
+ GivenDeclaration{"_T object", ""},
+ GivenDeclaration{
+ "object",
+ std::string("static_cast<const _T&>(") +
+ generator.description + ")"}),
+ object, source_of_truth, "std::as_const(object)",
+ "source_of_truth");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Perform a self move-assign.
+template <class T, class Prof>
+struct ExpectSelfMoveAssign {
+ template <class Fun>
+ void operator()(const Fun& generator) const {
+ T object = generator();
+ object = absl::move(object);
+
+ // NOTE: Self move-assign results in a valid-but-unspecified state.
+
+ (ExpectEquality<T, Prof>)(errors, "Move assignment",
+ PrepareGivenContext(
+ GivenDeclaration{"_T object",
+ generator.description},
+ GivenDeclaration{"object",
+ "std::move(object)"}),
+ object, object, "object", "object");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Perform a self copy-assign.
+template <class T, class Prof>
+struct ExpectSelfCopyAssign {
+ template <class Fun>
+ void operator()(const Fun& generator) const {
+ const T source_of_truth = generator();
+ T object = generator();
+ const T& const_object = object;
+ object = const_object;
+
+ (ExpectEquality<T, Prof>)(errors, "Copy assignment",
+ PrepareGivenContext(
+ GivenDeclaration{"const _T source_of_truth",
+ generator.description},
+ GivenDeclaration{"_T object",
+ generator.description},
+ GivenDeclaration{"object",
+ "std::as_const(object)"}),
+ const_object, source_of_truth,
+ "std::as_const(object)", "source_of_truth");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Perform a self-swap.
+template <class T, class Prof>
+struct ExpectSelfSwap {
+ template <class Fun>
+ void operator()(const Fun& generator) const {
+ const T source_of_truth = generator();
+ T object = generator();
+
+ type_traits_internal::Swap(object, object);
+
+ std::string preliminary_info = absl::StrCat(
+ PrepareGivenContext(
+ GivenDeclaration{"const _T source_of_truth", generator.description},
+ GivenDeclaration{"_T object", generator.description}),
+ "After performing a self-swap:\n"
+ " using std::swap;\n"
+ " swap(object, object);\n"
+ "\n");
+
+ (ExpectEquality<T, Prof>)(errors, "Swap", std::move(preliminary_info),
+ object, source_of_truth, "std::as_const(object)",
+ "source_of_truth");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Perform each of the single-generator checks when necessary operations are
+// supported.
+template <class T, class Prof>
+struct ExpectSelfComparison {
+ template <class Fun>
+ void operator()(const Fun& generator) const {
+ const T object = generator();
+ (ExpectOneWayEquality<T, Prof>)(errors, "Comparison",
+ PrepareGivenContext(GivenDeclaration{
+ "const _T object",
+ generator.description}),
+ object, object, "object", "object");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Perform each of the single-generator checks when necessary operations are
+// supported.
+template <class T, class Prof>
+struct ExpectConsistency {
+ template <class Fun>
+ void operator()(const Fun& generator) const {
+ If<PropertiesOfT<Prof>::is_move_constructible>::Invoke(
+ ExpectMoveConstructOneGenerator<T, Prof>{errors}, generator);
+
+ If<PropertiesOfT<Prof>::is_copy_constructible>::Invoke(
+ ExpectCopyConstructOneGenerator<T, Prof>{errors}, generator);
+
+ If<PropertiesOfT<Prof>::is_default_constructible &&
+ PropertiesOfT<Prof>::is_move_assignable>::
+ Invoke(ExpectDefaultConstructWithMoveAssign<T, Prof>{errors},
+ generator);
+
+ If<PropertiesOfT<Prof>::is_default_constructible &&
+ PropertiesOfT<Prof>::is_copy_assignable>::
+ Invoke(ExpectDefaultConstructWithCopyAssign<T, Prof>{errors},
+ generator);
+
+ If<PropertiesOfT<Prof>::is_move_assignable>::Invoke(
+ ExpectSelfMoveAssign<T, Prof>{errors}, generator);
+
+ If<PropertiesOfT<Prof>::is_copy_assignable>::Invoke(
+ ExpectSelfCopyAssign<T, Prof>{errors}, generator);
+
+ If<PropertiesOfT<Prof>::is_swappable>::Invoke(
+ ExpectSelfSwap<T, Prof>{errors}, generator);
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Check move-assign with two different values.
+template <class T, class Prof>
+struct ExpectMoveAssign {
+ template <class Fun0, class Fun1>
+ void operator()(const Fun0& generator0, const Fun1& generator1) const {
+ const T source_of_truth1 = generator1();
+ T object = generator0();
+ object = generator1();
+
+ (ExpectEquality<T, Prof>)(errors, "Move assignment",
+ PrepareGivenContext(
+ GivenDeclaration{"const _T source_of_truth1",
+ generator1.description},
+ GivenDeclaration{"_T object",
+ generator0.description},
+ GivenDeclaration{"object",
+ generator1.description}),
+ object, source_of_truth1, "std::as_const(object)",
+ "source_of_truth1");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Check copy-assign with two different values.
+template <class T, class Prof>
+struct ExpectCopyAssign {
+ template <class Fun0, class Fun1>
+ void operator()(const Fun0& generator0, const Fun1& generator1) const {
+ const T source_of_truth1 = generator1();
+ T object = generator0();
+ object = static_cast<const T&>(generator1());
+
+ (ExpectEquality<T, Prof>)(errors, "Copy assignment",
+ PrepareGivenContext(
+ GivenDeclaration{"const _T source_of_truth1",
+ generator1.description},
+ GivenDeclaration{"_T object",
+ generator0.description},
+ GivenDeclaration{
+ "object",
+ std::string("static_cast<const _T&>(") +
+ generator1.description + ")"}),
+ object, source_of_truth1, "std::as_const(object)",
+ "source_of_truth1");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Check swap with two different values.
+template <class T, class Prof>
+struct ExpectSwap {
+ template <class Fun0, class Fun1>
+ void operator()(const Fun0& generator0, const Fun1& generator1) const {
+ const T source_of_truth0 = generator0();
+ const T source_of_truth1 = generator1();
+ T object0 = generator0();
+ T object1 = generator1();
+
+ type_traits_internal::Swap(object0, object1);
+
+ const std::string context =
+ PrepareGivenContext(
+ GivenDeclaration{"const _T source_of_truth0",
+ generator0.description},
+ GivenDeclaration{"const _T source_of_truth1",
+ generator1.description},
+ GivenDeclaration{"_T object0", generator0.description},
+ GivenDeclaration{"_T object1", generator1.description}) +
+ "After performing a swap:\n"
+ " using std::swap;\n"
+ " swap(object0, object1);\n"
+ "\n";
+
+ (ExpectEquality<T, Prof>)(errors, "Swap", context, object0,
+ source_of_truth1, "std::as_const(object0)",
+ "source_of_truth1");
+ (ExpectEquality<T, Prof>)(errors, "Swap", context, object1,
+ source_of_truth0, "std::as_const(object1)",
+ "source_of_truth0");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Validate that `generator0` and `generator1` produce values that are equal.
+template <class T, class Prof>
+struct ExpectEquivalenceClassComparison {
+ template <class Fun0, class Fun1>
+ void operator()(const Fun0& generator0, const Fun1& generator1) const {
+ const T object0 = generator0();
+ const T object1 = generator1();
+
+ (ExpectEquality<T, Prof>)(errors, "Comparison",
+ PrepareGivenContext(
+ GivenDeclaration{"const _T object0",
+ generator0.description},
+ GivenDeclaration{"const _T object1",
+ generator1.description}),
+ object0, object1, "object0", "object1");
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Validate that all objects in the same equivalence-class have the same value.
+template <class T, class Prof>
+struct ExpectEquivalenceClassConsistency {
+ template <class Fun0, class Fun1>
+ void operator()(const Fun0& generator0, const Fun1& generator1) const {
+ If<PropertiesOfT<Prof>::is_move_assignable>::Invoke(
+ ExpectMoveAssign<T, Prof>{errors}, generator0, generator1);
+
+ If<PropertiesOfT<Prof>::is_copy_assignable>::Invoke(
+ ExpectCopyAssign<T, Prof>{errors}, generator0, generator1);
+
+ If<PropertiesOfT<Prof>::is_swappable>::Invoke(ExpectSwap<T, Prof>{errors},
+ generator0, generator1);
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Given a "lesser" object and a "greater" object, perform every combination of
+// comparison operators supported for the type, expecting consistent results.
+template <class T, class Prof>
+void ExpectOrdered(ConformanceErrors* errors, absl::string_view context,
+ const T& small, const T& big, absl::string_view small_name,
+ absl::string_view big_name) {
+ const absl::string_view test_name = "Comparison";
+
+ If<PropertiesOfT<Prof>::is_equality_comparable>::Invoke(
+ ExpectNotEq{errors}, test_name, context, small, big, small_name,
+ big_name);
+ If<PropertiesOfT<Prof>::is_equality_comparable>::Invoke(
+ ExpectNotEq{errors}, test_name, context, big, small, big_name,
+ small_name);
+
+ If<PropertiesOfT<Prof>::is_inequality_comparable>::Invoke(
+ ExpectNe{errors}, test_name, context, small, big, small_name, big_name);
+ If<PropertiesOfT<Prof>::is_inequality_comparable>::Invoke(
+ ExpectNe{errors}, test_name, context, big, small, big_name, small_name);
+
+ If<PropertiesOfT<Prof>::is_less_than_comparable>::Invoke(
+ ExpectLt{errors}, test_name, context, small, big, small_name, big_name);
+ If<PropertiesOfT<Prof>::is_less_than_comparable>::Invoke(
+ ExpectNotLt{errors}, test_name, context, big, small, big_name,
+ small_name);
+
+ If<PropertiesOfT<Prof>::is_less_equal_comparable>::Invoke(
+ ExpectLe{errors}, test_name, context, small, big, small_name, big_name);
+ If<PropertiesOfT<Prof>::is_less_equal_comparable>::Invoke(
+ ExpectNotLe{errors}, test_name, context, big, small, big_name,
+ small_name);
+
+ If<PropertiesOfT<Prof>::is_greater_equal_comparable>::Invoke(
+ ExpectNotGe{errors}, test_name, context, small, big, small_name,
+ big_name);
+ If<PropertiesOfT<Prof>::is_greater_equal_comparable>::Invoke(
+ ExpectGe{errors}, test_name, context, big, small, big_name, small_name);
+
+ If<PropertiesOfT<Prof>::is_greater_than_comparable>::Invoke(
+ ExpectNotGt{errors}, test_name, context, small, big, small_name,
+ big_name);
+ If<PropertiesOfT<Prof>::is_greater_than_comparable>::Invoke(
+ ExpectGt{errors}, test_name, context, big, small, big_name, small_name);
+}
+
+// For every two elements of an equivalence class, makes sure that those two
+// elements compare equal, including checks with the same argument passed as
+// both operands.
+template <class T, class Prof>
+struct ExpectEquivalenceClassComparisons {
+ template <class... Funs>
+ void operator()(EquivalenceClassType<Funs...> eq_class) const {
+ (ForEachTupleElement)(ExpectSelfComparison<T, Prof>{errors},
+ eq_class.generators);
+
+ (ForEveryTwo)(ExpectEquivalenceClassComparison<T, Prof>{errors},
+ eq_class.generators);
+ }
+
+ ConformanceErrors* errors;
+};
+
+// For every element of an equivalence class, makes sure that the element is
+// self-consistent (in other words, if any of move/copy/swap are defined,
+// perform those operations and make such that results and operands still
+// compare equal to known values whenever it is required for that operation.
+template <class T, class Prof>
+struct ExpectEquivalenceClass {
+ template <class... Funs>
+ void operator()(EquivalenceClassType<Funs...> eq_class) const {
+ (ForEachTupleElement)(ExpectConsistency<T, Prof>{errors},
+ eq_class.generators);
+
+ (ForEveryTwo)(ExpectEquivalenceClassConsistency<T, Prof>{errors},
+ eq_class.generators);
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Validate that the passed-in argument is a generator of a greater value than
+// the one produced by the "small_gen" datamember with respect to all of the
+// comparison operators that Prof requires, with both argument orders to test.
+template <class T, class Prof, class SmallGenerator>
+struct ExpectBiggerGeneratorThanComparisons {
+ template <class BigGenerator>
+ void operator()(BigGenerator big_gen) const {
+ const T small = small_gen();
+ const T big = big_gen();
+
+ (ExpectOrdered<T, Prof>)(errors,
+ PrepareGivenContext(
+ GivenDeclaration{"const _T small",
+ small_gen.description},
+ GivenDeclaration{"const _T big",
+ big_gen.description}),
+ small, big, "small", "big");
+ }
+
+ SmallGenerator small_gen;
+ ConformanceErrors* errors;
+};
+
+// Perform all of the move, copy, and swap checks on the value generated by
+// `small_gen` and the value generated by `big_gen`.
+template <class T, class Prof, class SmallGenerator>
+struct ExpectBiggerGeneratorThan {
+ template <class BigGenerator>
+ void operator()(BigGenerator big_gen) const {
+ If<PropertiesOfT<Prof>::is_move_assignable>::Invoke(
+ ExpectMoveAssign<T, Prof>{errors}, small_gen, big_gen);
+ If<PropertiesOfT<Prof>::is_move_assignable>::Invoke(
+ ExpectMoveAssign<T, Prof>{errors}, big_gen, small_gen);
+
+ If<PropertiesOfT<Prof>::is_copy_assignable>::Invoke(
+ ExpectCopyAssign<T, Prof>{errors}, small_gen, big_gen);
+ If<PropertiesOfT<Prof>::is_copy_assignable>::Invoke(
+ ExpectCopyAssign<T, Prof>{errors}, big_gen, small_gen);
+
+ If<PropertiesOfT<Prof>::is_swappable>::Invoke(ExpectSwap<T, Prof>{errors},
+ small_gen, big_gen);
+ }
+
+ SmallGenerator small_gen;
+ ConformanceErrors* errors;
+};
+
+// Validate that the result of a generator is greater than the results of all
+// generators in an equivalence class with respect to comparisons.
+template <class T, class Prof, class SmallGenerator>
+struct ExpectBiggerGeneratorThanEqClassesComparisons {
+ template <class BigEqClass>
+ void operator()(BigEqClass big_eq_class) const {
+ (ForEachTupleElement)(
+ ExpectBiggerGeneratorThanComparisons<T, Prof, SmallGenerator>{small_gen,
+ errors},
+ big_eq_class.generators);
+ }
+
+ SmallGenerator small_gen;
+ ConformanceErrors* errors;
+};
+
+// Validate that the non-comparison binary operations required by Prof are
+// correct for the result of each generator of big_eq_class and a generator of
+// the logically smaller value returned by small_gen.
+template <class T, class Prof, class SmallGenerator>
+struct ExpectBiggerGeneratorThanEqClasses {
+ template <class BigEqClass>
+ void operator()(BigEqClass big_eq_class) const {
+ (ForEachTupleElement)(
+ ExpectBiggerGeneratorThan<T, Prof, SmallGenerator>{small_gen, errors},
+ big_eq_class.generators);
+ }
+
+ SmallGenerator small_gen;
+ ConformanceErrors* errors;
+};
+
+// Validate that each equivalence class that is passed is logically less than
+// the equivalence classes that comes later on in the argument list.
+template <class T, class Prof>
+struct ExpectOrderedEquivalenceClassesComparisons {
+ template <class... BigEqClasses>
+ struct Impl {
+ // Validate that the value produced by `small_gen` is less than all of the
+ // values generated by those of the logically larger equivalence classes.
+ template <class SmallGenerator>
+ void operator()(SmallGenerator small_gen) const {
+ (ForEachTupleElement)(ExpectBiggerGeneratorThanEqClassesComparisons<
+ T, Prof, SmallGenerator>{small_gen, errors},
+ big_eq_classes);
+ }
+
+ std::tuple<BigEqClasses...> big_eq_classes;
+ ConformanceErrors* errors;
+ };
+
+ // When given no equivalence classes, no validation is necessary.
+ void operator()() const {}
+
+ template <class SmallEqClass, class... BigEqClasses>
+ void operator()(SmallEqClass small_eq_class,
+ BigEqClasses... big_eq_classes) const {
+ // For each generator in the first equivalence class, make sure that it is
+ // less than each of those in the logically greater equivalence classes.
+ (ForEachTupleElement)(
+ Impl<BigEqClasses...>{std::make_tuple(absl::move(big_eq_classes)...),
+ errors},
+ small_eq_class.generators);
+
+ // Recurse so that all equivalence class combinations are checked.
+ (*this)(absl::move(big_eq_classes)...);
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Validate that the non-comparison binary operations required by Prof are
+// correct for the result of each generator of big_eq_classes and a generator of
+// the logically smaller value returned by small_gen.
+template <class T, class Prof>
+struct ExpectOrderedEquivalenceClasses {
+ template <class... BigEqClasses>
+ struct Impl {
+ template <class SmallGenerator>
+ void operator()(SmallGenerator small_gen) const {
+ (ForEachTupleElement)(
+ ExpectBiggerGeneratorThanEqClasses<T, Prof, SmallGenerator>{small_gen,
+ errors},
+ big_eq_classes);
+ }
+
+ std::tuple<BigEqClasses...> big_eq_classes;
+ ConformanceErrors* errors;
+ };
+
+ // Check that small_eq_class is logically consistent and also is logically
+ // less than all values in big_eq_classes.
+ template <class SmallEqClass, class... BigEqClasses>
+ void operator()(SmallEqClass small_eq_class,
+ BigEqClasses... big_eq_classes) const {
+ (ForEachTupleElement)(
+ Impl<BigEqClasses...>{std::make_tuple(absl::move(big_eq_classes)...),
+ errors},
+ small_eq_class.generators);
+
+ (*this)(absl::move(big_eq_classes)...);
+ }
+
+ // Terminating case of operator().
+ void operator()() const {}
+
+ ConformanceErrors* errors;
+};
+
+// Validate that a type meets the syntactic requirements of std::hash if the
+// range of profiles requires it.
+template <class T, class MinProf, class MaxProf>
+struct ExpectHashable {
+ void operator()() const {
+ ExpectModelOfHashable<T, MinProf, MaxProf>(errors);
+ }
+
+ ConformanceErrors* errors;
+};
+
+// Validate that the type `T` meets all of the requirements associated with
+// `MinProf` and without going beyond the syntactic properties of `MaxProf`.
+template <class T, class MinProf, class MaxProf>
+struct ExpectModels {
+ void operator()(ConformanceErrors* errors) const {
+ ExpectModelOfDefaultConstructible<T, MinProf, MaxProf>(errors);
+ ExpectModelOfMoveConstructible<T, MinProf, MaxProf>(errors);
+ ExpectModelOfCopyConstructible<T, MinProf, MaxProf>(errors);
+ ExpectModelOfMoveAssignable<T, MinProf, MaxProf>(errors);
+ ExpectModelOfCopyAssignable<T, MinProf, MaxProf>(errors);
+ ExpectModelOfDestructible<T, MinProf, MaxProf>(errors);
+ ExpectModelOfEqualityComparable<T, MinProf, MaxProf>(errors);
+ ExpectModelOfInequalityComparable<T, MinProf, MaxProf>(errors);
+ ExpectModelOfLessThanComparable<T, MinProf, MaxProf>(errors);
+ ExpectModelOfLessEqualComparable<T, MinProf, MaxProf>(errors);
+ ExpectModelOfGreaterEqualComparable<T, MinProf, MaxProf>(errors);
+ ExpectModelOfGreaterThanComparable<T, MinProf, MaxProf>(errors);
+ ExpectModelOfSwappable<T, MinProf, MaxProf>(errors);
+
+ // Only check hashability on compilers that have a compliant default-hash.
+ If<!poisoned_hash_fails_instantiation()>::Invoke(
+ ExpectHashable<T, MinProf, MaxProf>{errors});
+ }
+};
+
+// A metafunction that yields a Profile matching the set of properties that are
+// safe to be checked (lack-of-hashability is only checked on standard library
+// implementations that are standards compliant in that they provide a std::hash
+// primary template that is SFINAE-friendly)
+template <class LogicalProf, class T>
+struct MinimalCheckableProfile {
+ using type =
+ MinimalProfiles<PropertiesOfT<LogicalProf>,
+ PropertiesOfT<SyntacticConformanceProfileOf<
+ T, !PropertiesOfT<LogicalProf>::is_hashable &&
+ poisoned_hash_fails_instantiation()
+ ? CheckHashability::no
+ : CheckHashability::yes>>>;
+};
+
+// An identity metafunction
+template <class T>
+struct Always {
+ using type = T;
+};
+
+// Validate the T meets all of the necessary requirements of LogicalProf, with
+// syntactic requirements defined by the profile range [MinProf, MaxProf].
+template <class T, class LogicalProf, class MinProf, class MaxProf,
+ class... EqClasses>
+ConformanceErrors ExpectRegularityImpl(
+ OrderedEquivalenceClasses<EqClasses...> vals) {
+ ConformanceErrors errors((NameOf<T>()));
+
+ If<!constexpr_instantiation_when_unevaluated()>::Invoke(
+ ExpectModels<T, MinProf, MaxProf>(), &errors);
+
+ using minimal_profile = typename absl::conditional_t<
+ constexpr_instantiation_when_unevaluated(), Always<LogicalProf>,
+ MinimalCheckableProfile<LogicalProf, T>>::type;
+
+ If<PropertiesOfT<minimal_profile>::is_default_constructible>::Invoke(
+ ExpectDefaultConstructWithDestruct<T>{&errors});
+
+ //////////////////////////////////////////////////////////////////////////////
+ // Perform all comparison checks first, since later checks depend on their
+ // correctness.
+ //
+ // Check all of the comparisons for all values in the same equivalence
+ // class (equal with respect to comparison operators and hash the same).
+ (ForEachTupleElement)(
+ ExpectEquivalenceClassComparisons<T, minimal_profile>{&errors},
+ vals.eq_classes);
+
+ // Check all of the comparisons for each combination of values that are in
+ // different equivalence classes (not equal with respect to comparison
+ // operators).
+ absl::apply(
+ ExpectOrderedEquivalenceClassesComparisons<T, minimal_profile>{&errors},
+ vals.eq_classes);
+ //
+ //////////////////////////////////////////////////////////////////////////////
+
+ // Perform remaining checks, relying on comparisons.
+ // TODO(calabrese) short circuit if any comparisons above failed.
+ (ForEachTupleElement)(ExpectEquivalenceClass<T, minimal_profile>{&errors},
+ vals.eq_classes);
+
+ absl::apply(ExpectOrderedEquivalenceClasses<T, minimal_profile>{&errors},
+ vals.eq_classes);
+
+ return errors;
+}
+
+// A type that represents a range of profiles that are acceptable to be matched.
+//
+// `MinProf` is the minimum set of syntactic requirements that must be met.
+//
+// `MaxProf` is the maximum set of syntactic requirements that must be met.
+// This maximum is particularly useful for certain "strictness" checking. Some
+// examples for when this is useful:
+//
+// * Making sure that a type is move-only (rather than simply movable)
+//
+// * Making sure that a member function is *not* noexcept in cases where it
+// cannot be noexcept, such as if a dependent datamember has certain
+// operations that are not noexcept.
+//
+// * Making sure that a type tightly matches a spec, such as the standard.
+//
+// `LogicalProf` is the Profile for which run-time testing is to take place.
+//
+// Note: The reason for `LogicalProf` is because it is often the case, when
+// dealing with templates, that a declaration of a given operation is specified,
+// but whose body would fail to instantiate. Examples include the
+// copy-constructor of a standard container when the element-type is move-only,
+// or the comparison operators of a standard container when the element-type
+// does not have the necessary comparison operations defined. The `LogicalProf`
+// parameter allows us to capture the intent of what should be tested at
+// run-time, even in the cases where syntactically it might otherwise appear as
+// though the type undergoing testing supports more than it actually does.
+template <class LogicalProf, class MinProf = LogicalProf,
+ class MaxProf = MinProf>
+struct ProfileRange {
+ using logical_profile = LogicalProf;
+ using min_profile = MinProf;
+ using max_profile = MaxProf;
+};
+
+// Similar to ProfileRange except that it creates a profile range that is
+// coupled with a Domain and is used when testing that a type matches exactly
+// the "minimum" requirements of LogicalProf.
+template <class StrictnessDomain, class LogicalProf,
+ class MinProf = LogicalProf, class MaxProf = MinProf>
+struct StrictProfileRange {
+ // We do not yet support extension.
+ static_assert(
+ std::is_same<StrictnessDomain, RegularityDomain>::value,
+ "Currently, the only valid StrictnessDomain is RegularityDomain.");
+ using strictness_domain = StrictnessDomain;
+ using logical_profile = LogicalProf;
+ using min_profile = MinProf;
+ using max_profile = MaxProf;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A metafunction that creates a StrictProfileRange from a Domain and either a
+// Profile or ProfileRange.
+template <class StrictnessDomain, class ProfOrRange>
+struct MakeStrictProfileRange;
+
+template <class StrictnessDomain, class LogicalProf>
+struct MakeStrictProfileRange {
+ using type = StrictProfileRange<StrictnessDomain, LogicalProf>;
+};
+
+template <class StrictnessDomain, class LogicalProf, class MinProf,
+ class MaxProf>
+struct MakeStrictProfileRange<StrictnessDomain,
+ ProfileRange<LogicalProf, MinProf, MaxProf>> {
+ using type =
+ StrictProfileRange<StrictnessDomain, LogicalProf, MinProf, MaxProf>;
+};
+
+template <class StrictnessDomain, class ProfOrRange>
+using MakeStrictProfileRangeT =
+ typename MakeStrictProfileRange<StrictnessDomain, ProfOrRange>::type;
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// A profile in the RegularityDomain with the strongest possible requirements.
+using MostStrictProfile =
+ CombineProfiles<TriviallyCompleteProfile, NothrowComparableProfile>;
+
+// Forms a ProfileRange that treats the Profile as the bare minimum requirements
+// of a type.
+template <class LogicalProf, class MinProf = LogicalProf>
+using LooseProfileRange = StrictProfileRange<RegularityDomain, LogicalProf,
+ MinProf, MostStrictProfile>;
+
+template <class Prof>
+using MakeLooseProfileRangeT = Prof;
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// The following classes implement the metafunction ProfileRangeOfT<T> that
+// takes either a Profile or ProfileRange and yields the ProfileRange to be
+// used during testing.
+//
+template <class T, class /*Enabler*/ = void>
+struct ProfileRangeOfImpl;
+
+template <class T>
+struct ProfileRangeOfImpl<T, absl::void_t<PropertiesOfT<T>>> {
+ using type = LooseProfileRange<T>;
+};
+
+template <class T>
+struct ProfileRangeOf : ProfileRangeOfImpl<T> {};
+
+template <class StrictnessDomain, class LogicalProf, class MinProf,
+ class MaxProf>
+struct ProfileRangeOf<
+ StrictProfileRange<StrictnessDomain, LogicalProf, MinProf, MaxProf>> {
+ using type =
+ StrictProfileRange<StrictnessDomain, LogicalProf, MinProf, MaxProf>;
+};
+
+template <class T>
+using ProfileRangeOfT = typename ProfileRangeOf<T>::type;
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// Extract the logical profile of a range (what will be runtime tested).
+template <class T>
+using LogicalProfileOfT = typename ProfileRangeOfT<T>::logical_profile;
+
+// Extract the minimal syntactic profile of a range (error if not at least).
+template <class T>
+using MinProfileOfT = typename ProfileRangeOfT<T>::min_profile;
+
+// Extract the maximum syntactic profile of a range (error if more than).
+template <class T>
+using MaxProfileOfT = typename ProfileRangeOfT<T>::max_profile;
+
+////////////////////////////////////////////////////////////////////////////////
+//
+template <class T>
+struct IsProfileOrProfileRange : IsProfile<T>::type {};
+
+template <class StrictnessDomain, class LogicalProf, class MinProf,
+ class MaxProf>
+struct IsProfileOrProfileRange<
+ StrictProfileRange<StrictnessDomain, LogicalProf, MinProf, MaxProf>>
+ : std::true_type {};
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// TODO(calabrese): Consider naming the functions in this class the same as
+// the macros (defined later on) so that auto-complete leads to the correct name
+// and so that a user cannot accidentally call a function rather than the macro
+// form.
+template <bool ExpectSuccess, class T, class... EqClasses>
+struct ExpectConformanceOf {
+ // Add a value to be tested. Subsequent calls to this function on the same
+ // object must specify logically "larger" values with respect to the
+ // comparison operators of the type, if any.
+ //
+ // NOTE: This function should not be called directly. A stateless lambda is
+ // implicitly formed and passed when using the INITIALIZER macro at the bottom
+ // of this file.
+ template <class Fun,
+ absl::enable_if_t<std::is_same<
+ ResultOfGeneratorT<GeneratorType<Fun>>, T>::value>** = nullptr>
+ ABSL_MUST_USE_RESULT ExpectConformanceOf<ExpectSuccess, T, EqClasses...,
+ EquivalenceClassType<Fun>>
+ initializer(GeneratorType<Fun> fun) && {
+ return {
+ {std::tuple_cat(absl::move(ordered_vals.eq_classes),
+ std::make_tuple((EquivalenceClass)(absl::move(fun))))},
+ std::move(expected_failed_tests)};
+ }
+
+ template <class... TestNames,
+ absl::enable_if_t<!ExpectSuccess && sizeof...(EqClasses) == 0 &&
+ absl::conjunction<std::is_convertible<
+ TestNames, absl::string_view>...>::value>** =
+ nullptr>
+ ABSL_MUST_USE_RESULT ExpectConformanceOf<ExpectSuccess, T, EqClasses...>
+ due_to(TestNames&&... test_names) && {
+ (InsertEach)(&expected_failed_tests,
+ absl::AsciiStrToLower(absl::string_view(test_names))...);
+
+ return {absl::move(ordered_vals), std::move(expected_failed_tests)};
+ }
+
+ template <class... TestNames, int = 0, // MSVC disambiguator
+ absl::enable_if_t<ExpectSuccess && sizeof...(EqClasses) == 0 &&
+ absl::conjunction<std::is_convertible<
+ TestNames, absl::string_view>...>::value>** =
+ nullptr>
+ ABSL_MUST_USE_RESULT ExpectConformanceOf<ExpectSuccess, T, EqClasses...>
+ due_to(TestNames&&... test_names) && {
+ // TODO(calabrese) Instead have DUE_TO only exist via a CRTP base.
+ // This would produce better errors messages than the static_assert.
+ static_assert(!ExpectSuccess,
+ "DUE_TO cannot be called when conformance is expected -- did "
+ "you mean to use ASSERT_NONCONFORMANCE_OF?");
+ }
+
+ // Add a value to be tested. Subsequent calls to this function on the same
+ // object must specify logically "larger" values with respect to the
+ // comparison operators of the type, if any.
+ //
+ // NOTE: This function should not be called directly. A stateful lambda is
+ // implicitly formed and passed when using the INITIALIZER macro at the bottom
+ // of this file.
+ template <class Fun,
+ absl::enable_if_t<std::is_same<
+ ResultOfGeneratorT<GeneratorType<Fun>>, T>::value>** = nullptr>
+ ABSL_MUST_USE_RESULT ExpectConformanceOf<ExpectSuccess, T, EqClasses...,
+ EquivalenceClassType<Fun>>
+ dont_class_directly_stateful_initializer(GeneratorType<Fun> fun) && {
+ return {
+ {std::tuple_cat(absl::move(ordered_vals.eq_classes),
+ std::make_tuple((EquivalenceClass)(absl::move(fun))))},
+ std::move(expected_failed_tests)};
+ }
+
+ // Add a set of value to be tested, where each value is equal with respect to
+ // the comparison operators and std::hash specialization, if defined.
+ template <
+ class... Funs,
+ absl::void_t<absl::enable_if_t<std::is_same<
+ ResultOfGeneratorT<GeneratorType<Funs>>, T>::value>...>** = nullptr>
+ ABSL_MUST_USE_RESULT ExpectConformanceOf<ExpectSuccess, T, EqClasses...,
+ EquivalenceClassType<Funs...>>
+ equivalence_class(GeneratorType<Funs>... funs) && {
+ return {{std::tuple_cat(
+ absl::move(ordered_vals.eq_classes),
+ std::make_tuple((EquivalenceClass)(absl::move(funs)...)))},
+ std::move(expected_failed_tests)};
+ }
+
+ // Execute the tests for the captured set of values, strictly matching a range
+ // of expected profiles in a given domain.
+ template <
+ class ProfRange,
+ absl::enable_if_t<IsProfileOrProfileRange<ProfRange>::value>** = nullptr>
+ ABSL_MUST_USE_RESULT ::testing::AssertionResult with_strict_profile(
+ ProfRange /*profile*/) {
+ ConformanceErrors test_result =
+ (ExpectRegularityImpl<
+ T, LogicalProfileOfT<ProfRange>, MinProfileOfT<ProfRange>,
+ MaxProfileOfT<ProfRange>>)(absl::move(ordered_vals));
+
+ return ExpectSuccess ? test_result.assertionResult()
+ : test_result.expectFailedTests(expected_failed_tests);
+ }
+
+ // Execute the tests for the captured set of values, loosely matching a range
+ // of expected profiles (loose in that an interface is allowed to be more
+ // refined that a profile suggests, such as a type having a noexcept copy
+ // constructor when all that is required is that the copy constructor exists).
+ template <class Prof, absl::enable_if_t<IsProfile<Prof>::value>** = nullptr>
+ ABSL_MUST_USE_RESULT ::testing::AssertionResult with_loose_profile(
+ Prof /*profile*/) {
+ ConformanceErrors test_result =
+ (ExpectRegularityImpl<
+ T, Prof, Prof,
+ CombineProfiles<TriviallyCompleteProfile,
+ NothrowComparableProfile>>)(absl::
+ move(ordered_vals));
+
+ return ExpectSuccess ? test_result.assertionResult()
+ : test_result.expectFailedTests(expected_failed_tests);
+ }
+
+ OrderedEquivalenceClasses<EqClasses...> ordered_vals;
+ std::set<std::string> expected_failed_tests;
+};
+
+template <class T>
+using ExpectConformanceOfType = ExpectConformanceOf</*ExpectSuccess=*/true, T>;
+
+template <class T>
+using ExpectNonconformanceOfType =
+ ExpectConformanceOf</*ExpectSuccess=*/false, T>;
+
+struct EquivalenceClassMaker {
+ // TODO(calabrese) Constrain to callable
+ template <class Fun>
+ static GeneratorType<Fun> initializer(GeneratorType<Fun> fun) {
+ return fun;
+ }
+};
+
+// A top-level macro that begins the builder pattern.
+//
+// The argument here takes the datatype to be tested.
+#define ABSL_INTERNAL_ASSERT_CONFORMANCE_OF(...) \
+ GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
+ if ABSL_INTERNAL_LPAREN \
+ const ::testing::AssertionResult gtest_ar = \
+ ABSL_INTERNAL_LPAREN ::absl::types_internal::ExpectConformanceOfType< \
+ __VA_ARGS__>()
+
+// Akin to ASSERT_CONFORMANCE_OF except that it expects failure and tries to
+// match text.
+#define ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(...) \
+ GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
+ if ABSL_INTERNAL_LPAREN \
+ const ::testing::AssertionResult gtest_ar = \
+ ABSL_INTERNAL_LPAREN ::absl::types_internal::ExpectNonconformanceOfType< \
+ __VA_ARGS__>()
+
+////////////////////////////////////////////////////////////////////////////////
+// NOTE: The following macros look like they are recursive, but are not (macros
+// cannot recurse). These actually refer to member functions of the same name.
+// This is done intentionally so that a user cannot accidentally invoke a
+// member function of the conformance-testing suite without going through the
+// macro.
+////////////////////////////////////////////////////////////////////////////////
+
+// Specify expected test failures as comma-separated strings.
+#define DUE_TO(...) due_to(__VA_ARGS__)
+
+// Specify a value to be tested.
+//
+// Note: Internally, this takes an expression and turns it into the return value
+// of lambda that captures no data. The expression is stringized during
+// preprocessing so that it can be used in error reports.
+#define INITIALIZER(...) \
+ initializer(::absl::types_internal::Generator( \
+ [] { return __VA_ARGS__; }, ABSL_INTERNAL_STRINGIZE(__VA_ARGS__)))
+
+// Specify a value to be tested.
+//
+// Note: Internally, this takes an expression and turns it into the return value
+// of lambda that captures data by reference. The expression is stringized
+// during preprocessing so that it can be used in error reports.
+#define STATEFUL_INITIALIZER(...) \
+ stateful_initializer(::absl::types_internal::Generator( \
+ [&] { return __VA_ARGS__; }, ABSL_INTERNAL_STRINGIZE(__VA_ARGS__)))
+
+// Used in the builder-pattern.
+//
+// Takes a series of INITIALIZER and/or STATEFUL_INITIALIZER invocations and
+// forwards them along to be tested, grouping them such that the testing suite
+// knows that they are supposed to represent the same logical value (the values
+// compare the same, hash the same, etc.).
+#define EQUIVALENCE_CLASS(...) \
+ equivalence_class(ABSL_INTERNAL_TRANSFORM_ARGS( \
+ ABSL_INTERNAL_PREPEND_EQ_MAKER, __VA_ARGS__))
+
+// An invocation of this or WITH_STRICT_PROFILE must end the builder-pattern.
+// It takes a Profile as its argument.
+//
+// This executes the tests and allows types that are "more referined" than the
+// profile specifies, but not less. For instance, if the Profile specifies
+// noexcept copy-constructiblity, the test will fail if the copy-constructor is
+// not noexcept, however, it will succeed if the copy constructor is trivial.
+//
+// This is useful for testing that a type meets some minimum set of
+// requirements.
+#define WITH_LOOSE_PROFILE(...) \
+ with_loose_profile( \
+ ::absl::types_internal::MakeLooseProfileRangeT<__VA_ARGS__>()) \
+ ABSL_INTERNAL_RPAREN ABSL_INTERNAL_RPAREN; \
+ else GTEST_FATAL_FAILURE_(gtest_ar.failure_message()) // NOLINT
+
+// An invocation of this or WITH_STRICT_PROFILE must end the builder-pattern.
+// It takes a Domain and a Profile as its arguments.
+//
+// This executes the tests and disallows types that differ at all from the
+// properties of the Profile. For instance, if the Profile specifies noexcept
+// copy-constructiblity, the test will fail if the copy constructor is trivial.
+//
+// This is useful for testing that a type does not do anything more than a
+// specification requires, such as to minimize things like Hyrum's Law, or more
+// commonly, to prevent a type from being "accidentally" copy-constructible in
+// a way that may produce incorrect results, simply because the user forget to
+// delete that operation.
+#define WITH_STRICT_PROFILE(...) \
+ with_strict_profile( \
+ ::absl::types_internal::MakeStrictProfileRangeT<__VA_ARGS__>()) \
+ ABSL_INTERNAL_RPAREN ABSL_INTERNAL_RPAREN; \
+ else GTEST_FATAL_FAILURE_(gtest_ar.failure_message()) // NOLINT
+
+// Internal macro that is used in the internals of the EDSL when forming
+// equivalence classes.
+#define ABSL_INTERNAL_PREPEND_EQ_MAKER(arg) \
+ ::absl::types_internal::EquivalenceClassMaker().arg
+
+} // namespace types_internal
+ABSL_NAMESPACE_END
+} // namespace absl
+
+#endif // ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_H_
diff --git a/absl/types/internal/conformance_testing_helpers.h b/absl/types/internal/conformance_testing_helpers.h
new file mode 100644
index 00000000..00775f96
--- /dev/null
+++ b/absl/types/internal/conformance_testing_helpers.h
@@ -0,0 +1,391 @@
+// 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.
+
+#ifndef ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_HELPERS_H_
+#define ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_HELPERS_H_
+
+// Checks to determine whether or not we can use abi::__cxa_demangle
+#if (defined(__ANDROID__) || defined(ANDROID)) && !defined(OS_ANDROID)
+#define ABSL_INTERNAL_OS_ANDROID
+#endif
+
+// We support certain compilers only. See demangle.h for details.
+#if defined(OS_ANDROID) && (defined(__i386__) || defined(__x86_64__))
+#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 0
+#elif (__GNUC__ >= 4 || (__GNUC__ >= 3 && __GNUC_MINOR__ >= 4)) && \
+ !defined(__mips__)
+#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 1
+#elif defined(__clang__) && !defined(_MSC_VER)
+#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 1
+#else
+#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 0
+#endif
+
+#include <tuple>
+#include <type_traits>
+#include <utility>
+
+#include "absl/meta/type_traits.h"
+#include "absl/strings/string_view.h"
+#include "absl/utility/utility.h"
+
+#if ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE
+#include <cxxabi.h>
+
+#include <cstdlib>
+#endif
+
+namespace absl {
+ABSL_NAMESPACE_BEGIN
+namespace types_internal {
+
+// Return a readable name for type T.
+template <class T>
+absl::string_view NameOfImpl() {
+// TODO(calabrese) Investigate using debugging:internal_demangle as a fallback.
+#if ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE
+ int status = 0;
+ char* demangled_name = nullptr;
+
+ demangled_name =
+ abi::__cxa_demangle(typeid(T).name(), nullptr, nullptr, &status);
+
+ if (status == 0 && demangled_name != nullptr) {
+ return demangled_name;
+ } else {
+ return typeid(T).name();
+ }
+#else
+ return typeid(T).name();
+#endif
+ // NOTE: We intentionally leak demangled_name so that it remains valid
+ // throughout the remainder of the program.
+}
+
+// Given a type, returns as nice of a type name as we can produce (demangled).
+//
+// Note: This currently strips cv-qualifiers and references, but that is okay
+// because we only use this internally with unqualified object types.
+template <class T>
+std::string NameOf() {
+ static const absl::string_view result = NameOfImpl<T>();
+ return std::string(result);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Metafunction to check if a type is callable with no explicit arguments
+template <class Fun, class /*Enabler*/ = void>
+struct IsNullaryCallableImpl : std::false_type {};
+
+template <class Fun>
+struct IsNullaryCallableImpl<
+ Fun, absl::void_t<decltype(std::declval<const Fun&>()())>>
+ : std::true_type {
+ using result_type = decltype(std::declval<const Fun&>()());
+
+ template <class ValueType>
+ using for_type = std::is_same<ValueType, result_type>;
+
+ using void_if_true = void;
+};
+
+template <class Fun>
+struct IsNullaryCallable : IsNullaryCallableImpl<Fun> {};
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// A type that contains a function object that returns an instance of a type
+// that is undergoing conformance testing. This function is required to always
+// return the same value upon invocation.
+template <class Fun>
+struct GeneratorType;
+
+// A type that contains a tuple of GeneratorType<Fun> where each Fun has the
+// same return type. The result of each of the different generators should all
+// be equal values, though the underlying object representation may differ (such
+// as if one returns 0.0 and another return -0.0, or if one returns an empty
+// vector and another returns an empty vector with a different capacity.
+template <class... Funs>
+struct EquivalenceClassType;
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A metafunction to check if a type is a specialization of EquivalenceClassType
+template <class T>
+struct IsEquivalenceClass : std::false_type {};
+
+template <>
+struct IsEquivalenceClass<EquivalenceClassType<>> : std::true_type {
+ using self = IsEquivalenceClass;
+
+ // A metafunction to check if this EquivalenceClassType is a valid
+ // EquivalenceClassType for a type `ValueType` that is undergoing testing
+ template <class ValueType>
+ using for_type = std::true_type;
+};
+
+template <class Head, class... Tail>
+struct IsEquivalenceClass<EquivalenceClassType<Head, Tail...>>
+ : std::true_type {
+ using self = IsEquivalenceClass;
+
+ // The type undergoing conformance testing that this EquivalenceClass
+ // corresponds to
+ using result_type = typename IsNullaryCallable<Head>::result_type;
+
+ // A metafunction to check if this EquivalenceClassType is a valid
+ // EquivalenceClassType for a type `ValueType` that is undergoing testing
+ template <class ValueType>
+ using for_type = std::is_same<ValueType, result_type>;
+};
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// A type that contains an ordered series of EquivalenceClassTypes, where the
+// the function object of each underlying GeneratorType has the same return type
+//
+// These equivalence classes are required to be in a logical ascending order
+// that is consistent with comparison operators that are defined for the return
+// type of each GeneratorType, if any.
+template <class... EqClasses>
+struct OrderedEquivalenceClasses;
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A metafunction to determine the return type of the function object contained
+// in a GeneratorType specialization.
+template <class T>
+struct ResultOfGenerator {};
+
+template <class Fun>
+struct ResultOfGenerator<GeneratorType<Fun>> {
+ using type = decltype(std::declval<const Fun&>()());
+};
+
+template <class Fun>
+using ResultOfGeneratorT = typename ResultOfGenerator<GeneratorType<Fun>>::type;
+//
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A metafunction that yields true iff each of Funs is a GeneratorType
+// specialization and they all contain functions with the same return type
+template <class /*Enabler*/, class... Funs>
+struct AreGeneratorsWithTheSameReturnTypeImpl : std::false_type {};
+
+template <>
+struct AreGeneratorsWithTheSameReturnTypeImpl<void> : std::true_type {};
+
+template <class Head, class... Tail>
+struct AreGeneratorsWithTheSameReturnTypeImpl<
+ typename std::enable_if<absl::conjunction<std::is_same<
+ ResultOfGeneratorT<Head>, ResultOfGeneratorT<Tail>>...>::value>::type,
+ Head, Tail...> : std::true_type {};
+
+template <class... Funs>
+struct AreGeneratorsWithTheSameReturnType
+ : AreGeneratorsWithTheSameReturnTypeImpl<void, Funs...>::type {};
+//
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// A metafunction that yields true iff each of Funs is an EquivalenceClassType
+// specialization and they all contain GeneratorType specializations that have
+// the same return type
+template <class... EqClasses>
+struct AreEquivalenceClassesOfTheSameType {
+ static_assert(sizeof...(EqClasses) != sizeof...(EqClasses), "");
+};
+
+template <>
+struct AreEquivalenceClassesOfTheSameType<> : std::true_type {
+ using self = AreEquivalenceClassesOfTheSameType;
+
+ // Metafunction to check that a type is the same as all of the equivalence
+ // classes, if any.
+ // Note: In this specialization there are no equivalence classes, so the
+ // value type is always compatible.
+ template <class /*ValueType*/>
+ using for_type = std::true_type;
+};
+
+template <class... Funs>
+struct AreEquivalenceClassesOfTheSameType<EquivalenceClassType<Funs...>>
+ : std::true_type {
+ using self = AreEquivalenceClassesOfTheSameType;
+
+ // Metafunction to check that a type is the same as all of the equivalence
+ // classes, if any.
+ template <class ValueType>
+ using for_type = typename IsEquivalenceClass<
+ EquivalenceClassType<Funs...>>::template for_type<ValueType>;
+};
+
+template <class... TailEqClasses>
+struct AreEquivalenceClassesOfTheSameType<
+ EquivalenceClassType<>, EquivalenceClassType<>, TailEqClasses...>
+ : AreEquivalenceClassesOfTheSameType<TailEqClasses...>::self {};
+
+template <class HeadNextFun, class... TailNextFuns, class... TailEqClasses>
+struct AreEquivalenceClassesOfTheSameType<
+ EquivalenceClassType<>, EquivalenceClassType<HeadNextFun, TailNextFuns...>,
+ TailEqClasses...>
+ : AreEquivalenceClassesOfTheSameType<
+ EquivalenceClassType<HeadNextFun, TailNextFuns...>,
+ TailEqClasses...>::self {};
+
+template <class HeadHeadFun, class... TailHeadFuns, class... TailEqClasses>
+struct AreEquivalenceClassesOfTheSameType<
+ EquivalenceClassType<HeadHeadFun, TailHeadFuns...>, EquivalenceClassType<>,
+ TailEqClasses...>
+ : AreEquivalenceClassesOfTheSameType<
+ EquivalenceClassType<HeadHeadFun, TailHeadFuns...>,
+ TailEqClasses...>::self {};
+
+template <class HeadHeadFun, class... TailHeadFuns, class HeadNextFun,
+ class... TailNextFuns, class... TailEqClasses>
+struct AreEquivalenceClassesOfTheSameType<
+ EquivalenceClassType<HeadHeadFun, TailHeadFuns...>,
+ EquivalenceClassType<HeadNextFun, TailNextFuns...>, TailEqClasses...>
+ : absl::conditional_t<
+ IsNullaryCallable<HeadNextFun>::template for_type<
+ typename IsNullaryCallable<HeadHeadFun>::result_type>::value,
+ AreEquivalenceClassesOfTheSameType<
+ EquivalenceClassType<HeadHeadFun, TailHeadFuns...>,
+ TailEqClasses...>,
+ std::false_type> {};
+//
+////////////////////////////////////////////////////////////////////////////////
+
+// Execute a function for each passed-in parameter.
+template <class Fun, class... Cases>
+void ForEachParameter(const Fun& fun, const Cases&... cases) {
+ const std::initializer_list<bool> results = {
+ (static_cast<void>(fun(cases)), true)...};
+
+ (void)results;
+}
+
+// Execute a function on each passed-in parameter (using a bound function).
+template <class Fun>
+struct ForEachParameterFun {
+ template <class... T>
+ void operator()(const T&... cases) const {
+ (ForEachParameter)(fun, cases...);
+ }
+
+ Fun fun;
+};
+
+// Execute a function on each element of a tuple.
+template <class Fun, class Tup>
+void ForEachTupleElement(const Fun& fun, const Tup& tup) {
+ absl::apply(ForEachParameterFun<Fun>{fun}, tup);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Execute a function for each combination of two elements of a tuple, including
+// combinations of an element with itself.
+template <class Fun, class... T>
+struct ForEveryTwoImpl {
+ template <class Lhs>
+ struct WithBoundLhs {
+ template <class Rhs>
+ void operator()(const Rhs& rhs) const {
+ fun(lhs, rhs);
+ }
+
+ Fun fun;
+ Lhs lhs;
+ };
+
+ template <class Lhs>
+ void operator()(const Lhs& lhs) const {
+ (ForEachTupleElement)(WithBoundLhs<Lhs>{fun, lhs}, args);
+ }
+
+ Fun fun;
+ std::tuple<T...> args;
+};
+
+template <class Fun, class... T>
+void ForEveryTwo(const Fun& fun, std::tuple<T...> args) {
+ (ForEachTupleElement)(ForEveryTwoImpl<Fun, T...>{fun, args}, args);
+}
+//
+////////////////////////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Insert all values into an associative container
+template<class Container>
+void InsertEach(Container* cont) {
+}
+
+template<class Container, class H, class... T>
+void InsertEach(Container* cont, H&& head, T&&... tail) {
+ cont->insert(head);
+ (InsertEach)(cont, tail...);
+}
+//
+////////////////////////////////////////////////////////////////////////////////
+// A template with a nested "Invoke" static-member-function that executes a
+// passed-in Callable when `Condition` is true, otherwise it ignores the
+// Callable. This is useful for executing a function object with a condition
+// that corresponds to whether or not the Callable can be safely instantiated.
+// It has some overlapping uses with C++17 `if constexpr`.
+template <bool Condition>
+struct If;
+
+template <>
+struct If</*Condition =*/false> {
+ template <class Fun, class... P>
+ static void Invoke(const Fun& /*fun*/, P&&... /*args*/) {}
+};
+
+template <>
+struct If</*Condition =*/true> {
+ template <class Fun, class... P>
+ static void Invoke(const Fun& fun, P&&... args) {
+ // TODO(calabrese) Use std::invoke equivalent instead of function-call.
+ fun(absl::forward<P>(args)...);
+ }
+};
+
+//
+// ABSL_INTERNAL_STRINGIZE(...)
+//
+// This variadic macro transforms its arguments into a c-string literal after
+// expansion.
+//
+// Example:
+//
+// ABSL_INTERNAL_STRINGIZE(std::array<int, 10>)
+//
+// Results in:
+//
+// "std::array<int, 10>"
+#define ABSL_INTERNAL_STRINGIZE(...) ABSL_INTERNAL_STRINGIZE_IMPL((__VA_ARGS__))
+#define ABSL_INTERNAL_STRINGIZE_IMPL(arg) ABSL_INTERNAL_STRINGIZE_IMPL2 arg
+#define ABSL_INTERNAL_STRINGIZE_IMPL2(...) #__VA_ARGS__
+
+} // namespace types_internal
+ABSL_NAMESPACE_END
+} // namespace absl
+
+#endif // ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_HELPERS_H_
diff --git a/absl/types/internal/conformance_testing_test.cc b/absl/types/internal/conformance_testing_test.cc
index 3dcf5305..cf262fa6 100644
--- a/absl/types/internal/conformance_testing_test.cc
+++ b/absl/types/internal/conformance_testing_test.cc
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+#include "absl/types/internal/conformance_testing.h"
+
#include <new>
#include <type_traits>
#include <utility>
@@ -19,6 +21,7 @@
#include "gtest/gtest.h"
#include "absl/meta/type_traits.h"
#include "absl/types/internal/conformance_aliases.h"
+#include "absl/types/internal/conformance_profile.h"
namespace {
@@ -1181,6 +1184,373 @@ INSTANTIATE_TYPED_TEST_SUITE_P(CommonComparable, ProfileTest,
CommonComparableProfilesToTest);
INSTANTIATE_TYPED_TEST_SUITE_P(Trivial, ProfileTest, TrivialProfilesToTest);
-// TODO(calabrese) Test runtime results
+TEST(ConformanceTestingTest, Basic) {
+ using profile = ti::CombineProfiles<ti::TriviallyCompleteProfile,
+ ti::NothrowComparableProfile>;
+
+ using lim = std::numeric_limits<float>;
+
+ ABSL_INTERNAL_ASSERT_CONFORMANCE_OF(float)
+ .INITIALIZER(-lim::infinity())
+ .INITIALIZER(lim::lowest())
+ .INITIALIZER(-1.f)
+ .INITIALIZER(-lim::min())
+ .EQUIVALENCE_CLASS(INITIALIZER(-0.f), INITIALIZER(0.f))
+ .INITIALIZER(lim::min())
+ .INITIALIZER(1.f)
+ .INITIALIZER(lim::max())
+ .INITIALIZER(lim::infinity())
+ .WITH_STRICT_PROFILE(absl::types_internal::RegularityDomain, profile);
+}
+
+struct BadMoveConstruct {
+ BadMoveConstruct() = default;
+ BadMoveConstruct(BadMoveConstruct&& other) noexcept
+ : value(other.value + 1) {}
+ BadMoveConstruct& operator=(BadMoveConstruct&& other) noexcept = default;
+ int value = 0;
+
+ friend bool operator==(BadMoveConstruct const& lhs,
+ BadMoveConstruct const& rhs) {
+ return lhs.value == rhs.value;
+ }
+ friend bool operator!=(BadMoveConstruct const& lhs,
+ BadMoveConstruct const& rhs) {
+ return lhs.value != rhs.value;
+ }
+};
+
+struct BadMoveAssign {
+ BadMoveAssign() = default;
+ BadMoveAssign(BadMoveAssign&& other) noexcept = default;
+ BadMoveAssign& operator=(BadMoveAssign&& other) noexcept {
+ int new_value = other.value + 1;
+ value = new_value;
+ return *this;
+ }
+ int value = 0;
+
+ friend bool operator==(BadMoveAssign const& lhs, BadMoveAssign const& rhs) {
+ return lhs.value == rhs.value;
+ }
+ friend bool operator!=(BadMoveAssign const& lhs, BadMoveAssign const& rhs) {
+ return lhs.value != rhs.value;
+ }
+};
+
+enum class WhichCompIsBad { eq, ne, lt, le, ge, gt };
+
+template <WhichCompIsBad Which>
+struct BadCompare {
+ int value;
+
+ friend bool operator==(BadCompare const& lhs, BadCompare const& rhs) {
+ return Which == WhichCompIsBad::eq ? lhs.value != rhs.value
+ : lhs.value == rhs.value;
+ }
+
+ friend bool operator!=(BadCompare const& lhs, BadCompare const& rhs) {
+ return Which == WhichCompIsBad::ne ? lhs.value == rhs.value
+ : lhs.value != rhs.value;
+ }
+
+ friend bool operator<(BadCompare const& lhs, BadCompare const& rhs) {
+ return Which == WhichCompIsBad::lt ? lhs.value >= rhs.value
+ : lhs.value < rhs.value;
+ }
+
+ friend bool operator<=(BadCompare const& lhs, BadCompare const& rhs) {
+ return Which == WhichCompIsBad::le ? lhs.value > rhs.value
+ : lhs.value <= rhs.value;
+ }
+
+ friend bool operator>=(BadCompare const& lhs, BadCompare const& rhs) {
+ return Which == WhichCompIsBad::ge ? lhs.value < rhs.value
+ : lhs.value >= rhs.value;
+ }
+
+ friend bool operator>(BadCompare const& lhs, BadCompare const& rhs) {
+ return Which == WhichCompIsBad::gt ? lhs.value <= rhs.value
+ : lhs.value > rhs.value;
+ }
+};
+
+TEST(ConformanceTestingDeathTest, Failures) {
+ {
+ using profile = ti::CombineProfiles<ti::TriviallyCompleteProfile,
+ ti::NothrowComparableProfile>;
+
+ // Note: The initializers are intentionally in the wrong order.
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(float)
+ .INITIALIZER(1.f)
+ .INITIALIZER(0.f)
+ .WITH_LOOSE_PROFILE(profile);
+ }
+
+ {
+ using profile =
+ ti::CombineProfiles<ti::NothrowMovableProfile, ti::EquatableProfile>;
+
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadMoveConstruct)
+ .DUE_TO("Move construction")
+ .INITIALIZER(BadMoveConstruct())
+ .WITH_LOOSE_PROFILE(profile);
+ }
+
+ {
+ using profile =
+ ti::CombineProfiles<ti::NothrowMovableProfile, ti::EquatableProfile>;
+
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadMoveAssign)
+ .DUE_TO("Move assignment")
+ .INITIALIZER(BadMoveAssign())
+ .WITH_LOOSE_PROFILE(profile);
+ }
+}
+
+TEST(ConformanceTestingDeathTest, CompFailures) {
+ using profile = ti::ComparableProfile;
+
+ {
+ using BadComp = BadCompare<WhichCompIsBad::eq>;
+
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
+ .DUE_TO("Comparison")
+ .INITIALIZER(BadComp{0})
+ .INITIALIZER(BadComp{1})
+ .WITH_LOOSE_PROFILE(profile);
+ }
+
+ {
+ using BadComp = BadCompare<WhichCompIsBad::ne>;
+
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
+ .DUE_TO("Comparison")
+ .INITIALIZER(BadComp{0})
+ .INITIALIZER(BadComp{1})
+ .WITH_LOOSE_PROFILE(profile);
+ }
+
+ {
+ using BadComp = BadCompare<WhichCompIsBad::lt>;
+
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
+ .DUE_TO("Comparison")
+ .INITIALIZER(BadComp{0})
+ .INITIALIZER(BadComp{1})
+ .WITH_LOOSE_PROFILE(profile);
+ }
+
+ {
+ using BadComp = BadCompare<WhichCompIsBad::le>;
+
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
+ .DUE_TO("Comparison")
+ .INITIALIZER(BadComp{0})
+ .INITIALIZER(BadComp{1})
+ .WITH_LOOSE_PROFILE(profile);
+ }
+
+ {
+ using BadComp = BadCompare<WhichCompIsBad::ge>;
+
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
+ .DUE_TO("Comparison")
+ .INITIALIZER(BadComp{0})
+ .INITIALIZER(BadComp{1})
+ .WITH_LOOSE_PROFILE(profile);
+ }
+
+ {
+ using BadComp = BadCompare<WhichCompIsBad::gt>;
+
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadComp)
+ .DUE_TO("Comparison")
+ .INITIALIZER(BadComp{0})
+ .INITIALIZER(BadComp{1})
+ .WITH_LOOSE_PROFILE(profile);
+ }
+}
+
+struct BadSelfMove {
+ BadSelfMove() = default;
+ BadSelfMove(BadSelfMove&&) = default;
+ BadSelfMove& operator=(BadSelfMove&& other) noexcept {
+ if (this == &other) {
+ broken_state = true;
+ }
+ return *this;
+ }
+
+ friend bool operator==(const BadSelfMove& lhs, const BadSelfMove& rhs) {
+ return !(lhs.broken_state || rhs.broken_state);
+ }
+
+ friend bool operator!=(const BadSelfMove& lhs, const BadSelfMove& rhs) {
+ return lhs.broken_state || rhs.broken_state;
+ }
+
+ bool broken_state = false;
+};
+
+TEST(ConformanceTestingDeathTest, SelfMoveFailure) {
+ using profile = ti::EquatableNothrowMovableProfile;
+
+ {
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadSelfMove)
+ .DUE_TO("Move assignment")
+ .INITIALIZER(BadSelfMove())
+ .WITH_LOOSE_PROFILE(profile);
+ }
+}
+
+struct BadSelfCopy {
+ BadSelfCopy() = default;
+ BadSelfCopy(BadSelfCopy&&) = default;
+ BadSelfCopy(const BadSelfCopy&) = default;
+ BadSelfCopy& operator=(BadSelfCopy&&) = default;
+ BadSelfCopy& operator=(BadSelfCopy const& other) {
+ if (this == &other) {
+ broken_state = true;
+ }
+ return *this;
+ }
+
+ friend bool operator==(const BadSelfCopy& lhs, const BadSelfCopy& rhs) {
+ return !(lhs.broken_state || rhs.broken_state);
+ }
+
+ friend bool operator!=(const BadSelfCopy& lhs, const BadSelfCopy& rhs) {
+ return lhs.broken_state || rhs.broken_state;
+ }
+
+ bool broken_state = false;
+};
+
+TEST(ConformanceTestingDeathTest, SelfCopyFailure) {
+ using profile = ti::EquatableValueProfile;
+
+ {
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadSelfCopy)
+ .DUE_TO("Copy assignment")
+ .INITIALIZER(BadSelfCopy())
+ .WITH_LOOSE_PROFILE(profile);
+ }
+}
+
+struct BadSelfSwap {
+ friend void swap(BadSelfSwap& lhs, BadSelfSwap& rhs) noexcept {
+ if (&lhs == &rhs) lhs.broken_state = true;
+ }
+
+ friend bool operator==(const BadSelfSwap& lhs, const BadSelfSwap& rhs) {
+ return !(lhs.broken_state || rhs.broken_state);
+ }
+
+ friend bool operator!=(const BadSelfSwap& lhs, const BadSelfSwap& rhs) {
+ return lhs.broken_state || rhs.broken_state;
+ }
+
+ bool broken_state = false;
+};
+
+TEST(ConformanceTestingDeathTest, SelfSwapFailure) {
+ using profile = ti::EquatableNothrowMovableProfile;
+
+ {
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadSelfSwap)
+ .DUE_TO("Swap")
+ .INITIALIZER(BadSelfSwap())
+ .WITH_LOOSE_PROFILE(profile);
+ }
+}
+
+struct BadDefaultInitializedMoveAssign {
+ BadDefaultInitializedMoveAssign() : default_initialized(true) {}
+ explicit BadDefaultInitializedMoveAssign(int v) : value(v) {}
+ BadDefaultInitializedMoveAssign(
+ BadDefaultInitializedMoveAssign&& other) noexcept
+ : value(other.value) {}
+ BadDefaultInitializedMoveAssign& operator=(
+ BadDefaultInitializedMoveAssign&& other) noexcept {
+ value = other.value;
+ if (default_initialized) ++value; // Bad move if lhs is default initialized
+ return *this;
+ }
+
+ friend bool operator==(const BadDefaultInitializedMoveAssign& lhs,
+ const BadDefaultInitializedMoveAssign& rhs) {
+ return lhs.value == rhs.value;
+ }
+
+ friend bool operator!=(const BadDefaultInitializedMoveAssign& lhs,
+ const BadDefaultInitializedMoveAssign& rhs) {
+ return lhs.value != rhs.value;
+ }
+
+ bool default_initialized = false;
+ int value = 0;
+};
+
+TEST(ConformanceTestingDeathTest, DefaultInitializedMoveAssignFailure) {
+ using profile =
+ ti::CombineProfiles<ti::DefaultConstructibleNothrowMovableProfile,
+ ti::EquatableProfile>;
+
+ {
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadDefaultInitializedMoveAssign)
+ .DUE_TO("move assignment")
+ .INITIALIZER(BadDefaultInitializedMoveAssign(0))
+ .WITH_LOOSE_PROFILE(profile);
+ }
+}
+
+struct BadDefaultInitializedCopyAssign {
+ BadDefaultInitializedCopyAssign() : default_initialized(true) {}
+ explicit BadDefaultInitializedCopyAssign(int v) : value(v) {}
+ BadDefaultInitializedCopyAssign(
+ BadDefaultInitializedCopyAssign&& other) noexcept
+ : value(other.value) {}
+ BadDefaultInitializedCopyAssign(const BadDefaultInitializedCopyAssign& other)
+ : value(other.value) {}
+
+ BadDefaultInitializedCopyAssign& operator=(
+ BadDefaultInitializedCopyAssign&& other) noexcept {
+ value = other.value;
+ return *this;
+ }
+
+ BadDefaultInitializedCopyAssign& operator=(
+ const BadDefaultInitializedCopyAssign& other) {
+ value = other.value;
+ if (default_initialized) ++value; // Bad move if lhs is default initialized
+ return *this;
+ }
+
+ friend bool operator==(const BadDefaultInitializedCopyAssign& lhs,
+ const BadDefaultInitializedCopyAssign& rhs) {
+ return lhs.value == rhs.value;
+ }
+
+ friend bool operator!=(const BadDefaultInitializedCopyAssign& lhs,
+ const BadDefaultInitializedCopyAssign& rhs) {
+ return lhs.value != rhs.value;
+ }
+
+ bool default_initialized = false;
+ int value = 0;
+};
+
+TEST(ConformanceTestingDeathTest, DefaultInitializedAssignFailure) {
+ using profile = ti::CombineProfiles<ti::DefaultConstructibleValueProfile,
+ ti::EquatableProfile>;
+
+ {
+ ABSL_INTERNAL_ASSERT_NONCONFORMANCE_OF(BadDefaultInitializedCopyAssign)
+ .DUE_TO("copy assignment")
+ .INITIALIZER(BadDefaultInitializedCopyAssign(0))
+ .WITH_LOOSE_PROFILE(profile);
+ }
+}
} // namespace
diff --git a/absl/types/internal/parentheses.h b/absl/types/internal/parentheses.h
new file mode 100644
index 00000000..5aebee8f
--- /dev/null
+++ b/absl/types/internal/parentheses.h
@@ -0,0 +1,34 @@
+// 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.
+//
+// -----------------------------------------------------------------------------
+// parentheses.h
+// -----------------------------------------------------------------------------
+//
+// This file contains macros that expand to a left parenthesis and a right
+// parenthesis. These are in their own file and are generated from macros
+// because otherwise clang-format gets confused and clang-format off directives
+// do not help.
+//
+// The parentheses macros are used when wanting to require a rescan before
+// expansion of parenthesized text appearing after a function-style macro name.
+
+#ifndef ABSL_TYPES_INTERNAL_PARENTHESES_H_
+#define ABSL_TYPES_INTERNAL_PARENTHESES_H_
+
+#define ABSL_INTERNAL_LPAREN (
+
+#define ABSL_INTERNAL_RPAREN )
+
+#endif // ABSL_TYPES_INTERNAL_PARENTHESES_H_
diff --git a/absl/types/internal/transform_args.h b/absl/types/internal/transform_args.h
new file mode 100644
index 00000000..4a0ab42a
--- /dev/null
+++ b/absl/types/internal/transform_args.h
@@ -0,0 +1,246 @@
+// 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.
+//
+// -----------------------------------------------------------------------------
+// transform_args.h
+// -----------------------------------------------------------------------------
+//
+// This file contains a higher-order macro that "transforms" each element of a
+// a variadic argument by a provided secondary macro.
+
+#ifndef ABSL_TYPES_INTERNAL_TRANSFORM_ARGS_H_
+#define ABSL_TYPES_INTERNAL_TRANSFORM_ARGS_H_
+
+//
+// ABSL_INTERNAL_CAT(a, b)
+//
+// This macro takes two arguments and concatenates them together via ## after
+// expansion.
+//
+// Example:
+//
+// ABSL_INTERNAL_CAT(foo_, bar)
+//
+// Results in:
+//
+// foo_bar
+#define ABSL_INTERNAL_CAT(a, b) ABSL_INTERNAL_CAT_IMPL(a, b)
+#define ABSL_INTERNAL_CAT_IMPL(a, b) a##b
+
+//
+// ABSL_INTERNAL_TRANSFORM_ARGS(m, ...)
+//
+// This macro takes another macro as an argument followed by a trailing series
+// of additional parameters (up to 32 additional arguments). It invokes the
+// passed-in macro once for each of the additional arguments, with the
+// expansions separated by commas.
+//
+// Example:
+//
+// ABSL_INTERNAL_TRANSFORM_ARGS(MY_MACRO, a, b, c)
+//
+// Results in:
+//
+// MY_MACRO(a), MY_MACRO(b), MY_MACRO(c)
+//
+// TODO(calabrese) Handle no arguments as a special case.
+#define ABSL_INTERNAL_TRANSFORM_ARGS(m, ...) \
+ ABSL_INTERNAL_CAT(ABSL_INTERNAL_TRANSFORM_ARGS, \
+ ABSL_INTERNAL_NUM_ARGS(__VA_ARGS__)) \
+ (m, __VA_ARGS__)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS1(m, a0) m(a0)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS2(m, a0, a1) m(a0), m(a1)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS3(m, a0, a1, a2) m(a0), m(a1), m(a2)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS4(m, a0, a1, a2, a3) \
+ m(a0), m(a1), m(a2), m(a3)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS5(m, a0, a1, a2, a3, a4) \
+ m(a0), m(a1), m(a2), m(a3), m(a4)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS6(m, a0, a1, a2, a3, a4, a5) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS7(m, a0, a1, a2, a3, a4, a5, a6) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS8(m, a0, a1, a2, a3, a4, a5, a6, a7) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS9(m, a0, a1, a2, a3, a4, a5, a6, a7, a8) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS10(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS11(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), m(a10)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS12(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS13(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS14(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS15(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS16(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS17(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15, a16) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS18(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15, a16, \
+ a17) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS19(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15, a16, \
+ a17, a18) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS20(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15, a16, \
+ a17, a18, a19) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS21(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15, a16, \
+ a17, a18, a19, a20) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS22(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15, a16, \
+ a17, a18, a19, a20, a21) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS23(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15, a16, \
+ a17, a18, a19, a20, a21, a22) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21), m(a22)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS24(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15, a16, \
+ a17, a18, a19, a20, a21, a22, a23) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21), m(a22), m(a23)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS25(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15, a16, \
+ a17, a18, a19, a20, a21, a22, a23, a24) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21), m(a22), m(a23), m(a24)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS26( \
+ m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
+ a16, a17, a18, a19, a20, a21, a22, a23, a24, a25) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS27( \
+ m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
+ a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS28( \
+ m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
+ a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS29( \
+ m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
+ a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27), \
+ m(a28)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS30( \
+ m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
+ a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27), \
+ m(a28), m(a29)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS31( \
+ m, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, \
+ a16, a17, a18, a19, a20, a21, a22, a23, a24, a25, a26, a27, a28, a29, a30) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27), \
+ m(a28), m(a29), m(a30)
+
+#define ABSL_INTERNAL_TRANSFORM_ARGS32(m, a0, a1, a2, a3, a4, a5, a6, a7, a8, \
+ a9, a10, a11, a12, a13, a14, a15, a16, \
+ a17, a18, a19, a20, a21, a22, a23, a24, \
+ a25, a26, a27, a28, a29, a30, a31) \
+ m(a0), m(a1), m(a2), m(a3), m(a4), m(a5), m(a6), m(a7), m(a8), m(a9), \
+ m(a10), m(a11), m(a12), m(a13), m(a14), m(a15), m(a16), m(a17), m(a18), \
+ m(a19), m(a20), m(a21), m(a22), m(a23), m(a24), m(a25), m(a26), m(a27), \
+ m(a28), m(a29), m(a30), m(a31)
+
+#define ABSL_INTERNAL_NUM_ARGS_IMPL(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, \
+ a10, a11, a12, a13, a14, a15, a16, a17, \
+ a18, a19, a20, a21, a22, a23, a24, a25, \
+ a26, a27, a28, a29, a30, a31, result, ...) \
+ result
+
+#define ABSL_INTERNAL_FORCE_EXPANSION(...) __VA_ARGS__
+
+#define ABSL_INTERNAL_NUM_ARGS(...) \
+ ABSL_INTERNAL_FORCE_EXPANSION(ABSL_INTERNAL_NUM_ARGS_IMPL( \
+ __VA_ARGS__, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, \
+ 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, ))
+
+#endif // ABSL_TYPES_INTERNAL_TRANSFORM_ARGS_H_